Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline
Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentr...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Jinxin [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Self-assembled 3D hierarchical MnCO - Rajendiran, Rajmohan ELSEVIER, 2020, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:362 ; year:2022 ; day:15 ; month:08 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.jclepro.2022.132469 |
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ELV05817771X |
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| 245 | 1 | 0 | |a Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline |
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| 520 | |a Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. | ||
| 520 | |a Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. | ||
| 650 | 7 | |a Perovskite |2 Elsevier | |
| 650 | 7 | |a Fenton |2 Elsevier | |
| 650 | 7 | |a A-site deficient |2 Elsevier | |
| 650 | 7 | |a Oxygen vacancy |2 Elsevier | |
| 650 | 7 | |a Tetracycline |2 Elsevier | |
| 700 | 1 | |a Ma, Wencheng |4 oth | |
| 700 | 1 | |a Zhong, Dan |4 oth | |
| 700 | 1 | |a Li, Kefei |4 oth | |
| 700 | 1 | |a Ma, Jun |4 oth | |
| 700 | 1 | |a Zhang, Shaobo |4 oth | |
| 700 | 1 | |a Du, Xuan |4 oth | |
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10.1016/j.jclepro.2022.132469 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001937.pica (DE-627)ELV05817771X (ELSEVIER)S0959-6526(22)02070-4 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Jinxin verfasserin aut Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Perovskite Elsevier Fenton Elsevier A-site deficient Elsevier Oxygen vacancy Elsevier Tetracycline Elsevier Ma, Wencheng oth Zhong, Dan oth Li, Kefei oth Ma, Jun oth Zhang, Shaobo oth Du, Xuan oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:362 year:2022 day:15 month:08 pages:0 https://doi.org/10.1016/j.jclepro.2022.132469 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 362 2022 15 0815 0 |
| spelling |
10.1016/j.jclepro.2022.132469 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001937.pica (DE-627)ELV05817771X (ELSEVIER)S0959-6526(22)02070-4 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Jinxin verfasserin aut Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Perovskite Elsevier Fenton Elsevier A-site deficient Elsevier Oxygen vacancy Elsevier Tetracycline Elsevier Ma, Wencheng oth Zhong, Dan oth Li, Kefei oth Ma, Jun oth Zhang, Shaobo oth Du, Xuan oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:362 year:2022 day:15 month:08 pages:0 https://doi.org/10.1016/j.jclepro.2022.132469 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 362 2022 15 0815 0 |
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10.1016/j.jclepro.2022.132469 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001937.pica (DE-627)ELV05817771X (ELSEVIER)S0959-6526(22)02070-4 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Jinxin verfasserin aut Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Perovskite Elsevier Fenton Elsevier A-site deficient Elsevier Oxygen vacancy Elsevier Tetracycline Elsevier Ma, Wencheng oth Zhong, Dan oth Li, Kefei oth Ma, Jun oth Zhang, Shaobo oth Du, Xuan oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:362 year:2022 day:15 month:08 pages:0 https://doi.org/10.1016/j.jclepro.2022.132469 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 362 2022 15 0815 0 |
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10.1016/j.jclepro.2022.132469 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001937.pica (DE-627)ELV05817771X (ELSEVIER)S0959-6526(22)02070-4 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Jinxin verfasserin aut Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Perovskite Elsevier Fenton Elsevier A-site deficient Elsevier Oxygen vacancy Elsevier Tetracycline Elsevier Ma, Wencheng oth Zhong, Dan oth Li, Kefei oth Ma, Jun oth Zhang, Shaobo oth Du, Xuan oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:362 year:2022 day:15 month:08 pages:0 https://doi.org/10.1016/j.jclepro.2022.132469 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 362 2022 15 0815 0 |
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10.1016/j.jclepro.2022.132469 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001937.pica (DE-627)ELV05817771X (ELSEVIER)S0959-6526(22)02070-4 DE-627 ger DE-627 rakwb eng 540 VZ 35.18 bkl Li, Jinxin verfasserin aut Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. Perovskite Elsevier Fenton Elsevier A-site deficient Elsevier Oxygen vacancy Elsevier Tetracycline Elsevier Ma, Wencheng oth Zhong, Dan oth Li, Kefei oth Ma, Jun oth Zhang, Shaobo oth Du, Xuan oth Enthalten in Elsevier Science Rajendiran, Rajmohan ELSEVIER Self-assembled 3D hierarchical MnCO 2020 Amsterdam [u.a.] (DE-627)ELV003750353 volume:362 year:2022 day:15 month:08 pages:0 https://doi.org/10.1016/j.jclepro.2022.132469 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 35.18 Kolloidchemie Grenzflächenchemie VZ AR 362 2022 15 0815 0 |
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oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for fenton-like oxidation of tetracycline |
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Oxygen vacancy concentration modulation of perovskite-based heterogeneous catalysts for Fenton-like oxidation of tetracycline |
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Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. |
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Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. |
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Oxygen vacancies (VO) constructing in metallic compounds have been verified to enhance hydrogen peroxide (H2O2) activation for pollutants treatment. However, the interactions between surface VO concentration and H2O2 were still ambiguous. In this study, perovskites with different surface VO concentration were successfully prepared by a simple sol-gel process. Experimental results showed that A-site cation deficient was capable of distorting FeO6 octahedra in Ca1−xFeO3-δ (x = 0, 0.1, 0.2) orthorhombic perovskites for the regulation of surface VO concentration. Afterwards, Ca0.9FeO3-δ exhibited excellent catalytic activity and stability for tetracycline (TC) degradation, which was 4 times higher of catalytic enhancement than that of the raw Ca1.0FeO3-δ. Moreover, up to 9, 17 and 27 times of catalytic enhancement as compared with commercial Fe3O4, ɑ-FeOOH and Fe2O3 towards TC degradation. Based on electron spin resonance and free radical quenching experiments, the hydroxyl radical (∙OH) was the main active species for the catalytic degradation of TC. Meanwhile, higher or lower surface VO concentration was harmful to the production of ∙OH. Additionally, the toxicity of TC degradation by-products exhibited a decreasing trend according to the results of toxicological simulation. This work provides a new strategy for designing an efficient and promising heterogeneous Fenton-likes catalyst for environmental remediation. |
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