Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions
Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washe...
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| Autor*in: |
Yang, Juan [verfasserIn] Mei, Sen [verfasserIn] Ferreira, José M. F. [verfasserIn] |
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| Format: |
E-Artikel |
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| Erschienen: |
Westerville, Ohio: American Ceramics Society ; 2000 |
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| Schlagwörter: |
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| Umfang: |
Online-Ressource |
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| Reproduktion: |
2004 ; Blackwell Publishing Journal Backfiles 1879-2005 |
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| Übergeordnetes Werk: |
In: Journal of the American Ceramic Society - American Ceramic Society ; GKD-ID: 6113X, Oxford [u.a.] : Wiley-Blackwell, 1918, 83(2000), 6, Seite 0 |
| Übergeordnetes Werk: |
volume:83 ; year:2000 ; number:6 ; pages:0 |
| Links: |
|---|
| DOI / URN: |
10.1111/j.1151-2916.2000.tb01394.x |
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NLEJ243471157 |
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| 245 | 1 | 0 | |a Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
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| 520 | |a Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. | ||
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10.1111/j.1151-2916.2000.tb01394.x doi (DE-627)NLEJ243471157 DE-627 ger DE-627 rakwb Yang, Juan verfasserin aut Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions Westerville, Ohio American Ceramics Society 2000 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| titanium oxide Mei, Sen verfasserin aut Ferreira, José M. F. verfasserin aut In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 83(2000), 6, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:83 year:2000 number:6 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2000.tb01394.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 83 2000 6 0 |
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10.1111/j.1151-2916.2000.tb01394.x doi (DE-627)NLEJ243471157 DE-627 ger DE-627 rakwb Yang, Juan verfasserin aut Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions Westerville, Ohio American Ceramics Society 2000 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| titanium oxide Mei, Sen verfasserin aut Ferreira, José M. F. verfasserin aut In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 83(2000), 6, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:83 year:2000 number:6 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2000.tb01394.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 83 2000 6 0 |
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10.1111/j.1151-2916.2000.tb01394.x doi (DE-627)NLEJ243471157 DE-627 ger DE-627 rakwb Yang, Juan verfasserin aut Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions Westerville, Ohio American Ceramics Society 2000 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| titanium oxide Mei, Sen verfasserin aut Ferreira, José M. F. verfasserin aut In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 83(2000), 6, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:83 year:2000 number:6 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2000.tb01394.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 83 2000 6 0 |
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10.1111/j.1151-2916.2000.tb01394.x doi (DE-627)NLEJ243471157 DE-627 ger DE-627 rakwb Yang, Juan verfasserin aut Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions Westerville, Ohio American Ceramics Society 2000 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| titanium oxide Mei, Sen verfasserin aut Ferreira, José M. F. verfasserin aut In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 83(2000), 6, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:83 year:2000 number:6 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2000.tb01394.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 83 2000 6 0 |
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10.1111/j.1151-2916.2000.tb01394.x doi (DE-627)NLEJ243471157 DE-627 ger DE-627 rakwb Yang, Juan verfasserin aut Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions Westerville, Ohio American Ceramics Society 2000 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| titanium oxide Mei, Sen verfasserin aut Ferreira, José M. F. verfasserin aut In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 83(2000), 6, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:83 year:2000 number:6 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2000.tb01394.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 83 2000 6 0 |
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Yang, Juan misc titanium oxide Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
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Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions titanium oxide |
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American Ceramics Society |
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Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
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Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
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Yang, Juan |
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Journal of the American Ceramic Society |
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Yang, Juan Mei, Sen Ferreira, José M. F. |
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Yang, Juan |
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10.1111/j.1151-2916.2000.tb01394.x |
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hydrothermal synthesis of nanosized titania powders: influence of peptization and peptizing agents on the crystalline phases and phase transitions |
| title_auth |
Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
| abstract |
Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. |
| abstractGer |
Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. |
| abstract_unstemmed |
Nanocrystalline TiO2 particles were prepared by hydrothermally treating three different titanium alkoxide species, which were derived from (i) the hydrolysis of Ti(OPr)4 and Ti(OBu)4 (PT and BT, respectively) in the presence of HNO3, tetraethylammonium hydroxide (TENOH), or NH3·H2O; (ii) water-washed precipitates; or (iii) sols that were obtained from the precipitates by peptizing with HNO3 or TENOH. X-ray diffractometry, Brunauer–Emmitt–Teller (BET) surface area analysis, differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to characterize the powders. The results showed that peptization of the precipitate favored formation of the rutile phase and highly crystalline anatase under hydrothermal treatment. Particles of 100% rutile phase with high specific surface areas were obtained at a relatively low temperatures: room temperature, for HNO3-peptized ([H+]/[Ti] = 4) PT sample (BET surface area of 96 m2/g); 200°C, for the HNO3-peptized ([H+]/[Ti] = 1) PT sample (BET surface area of 49 m2/g); and 240°C for the HNO3-peptized ([H+]/[Ti] = 1) BT sample (BET surface area of 42 m2/g). Particles that contained highly crystalline anatase, together with a small portion of rutile, were formed in both TENOH-peptized samples. However, rutile was difficult to form, both in the water-washed precipitates and in the species that was hydrolyzed in the presence of HNO3, TENOH, and NH3·H2O. The peptization effect of the H+ ion mainly lies in the breakage of oxolation by attacking the electrophilic O atoms among Ti atoms, thus creating conditions for the formation of rutile or anatase nuclei, after structural rearrangement. |
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Hydrothermal Synthesis of Nanosized Titania Powders: Influence of Peptization and Peptizing Agents on the Crystalline Phases and Phase Transitions |
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