Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions

This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a convention...
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Autor*in:	Diogo Lopes [verfasserIn] Ana Luísa Daniel-da-Silva [verfasserIn] Artur R. Sarabando [verfasserIn] Blanca I. Arias-Serrano [verfasserIn] Elena Rodríguez-Aguado [verfasserIn] Enrique Rodríguez-Castellón [verfasserIn] Tito Trindade [verfasserIn] Jorge R. Frade [verfasserIn] Andrei V. Kovalevsky [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	photocatalysis tio anatase silicon carbide taguchi plan redox reaction

Übergeordnetes Werk:	In: Materials - MDPI AG, 2009, 13(2020), 3, p 758
Übergeordnetes Werk:	volume:13 ; year:2020 ; number:3, p 758

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/ma13030758

Katalog-ID:	DOAJ017209919

Internformat


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allfields	10.3390/ma13030758 doi (DE-627)DOAJ017209919 (DE-599)DOAJ1a1cf6aa77ea4e2a852bbaac9020136d DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Diogo Lopes verfasserin aut Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements. photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Ana Luísa Daniel-da-Silva verfasserin aut Artur R. Sarabando verfasserin aut Blanca I. Arias-Serrano verfasserin aut Elena Rodríguez-Aguado verfasserin aut Enrique Rodríguez-Castellón verfasserin aut Tito Trindade verfasserin aut Jorge R. Frade verfasserin aut Andrei V. Kovalevsky verfasserin aut In Materials MDPI AG, 2009 13(2020), 3, p 758 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:13 year:2020 number:3, p 758 https://doi.org/10.3390/ma13030758 kostenfrei https://doaj.org/article/1a1cf6aa77ea4e2a852bbaac9020136d kostenfrei https://www.mdpi.com/1996-1944/13/3/758 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 3, p 758
spelling	10.3390/ma13030758 doi (DE-627)DOAJ017209919 (DE-599)DOAJ1a1cf6aa77ea4e2a852bbaac9020136d DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Diogo Lopes verfasserin aut Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements. photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Ana Luísa Daniel-da-Silva verfasserin aut Artur R. Sarabando verfasserin aut Blanca I. Arias-Serrano verfasserin aut Elena Rodríguez-Aguado verfasserin aut Enrique Rodríguez-Castellón verfasserin aut Tito Trindade verfasserin aut Jorge R. Frade verfasserin aut Andrei V. Kovalevsky verfasserin aut In Materials MDPI AG, 2009 13(2020), 3, p 758 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:13 year:2020 number:3, p 758 https://doi.org/10.3390/ma13030758 kostenfrei https://doaj.org/article/1a1cf6aa77ea4e2a852bbaac9020136d kostenfrei https://www.mdpi.com/1996-1944/13/3/758 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 3, p 758
allfields_unstemmed	10.3390/ma13030758 doi (DE-627)DOAJ017209919 (DE-599)DOAJ1a1cf6aa77ea4e2a852bbaac9020136d DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Diogo Lopes verfasserin aut Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements. photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Ana Luísa Daniel-da-Silva verfasserin aut Artur R. Sarabando verfasserin aut Blanca I. Arias-Serrano verfasserin aut Elena Rodríguez-Aguado verfasserin aut Enrique Rodríguez-Castellón verfasserin aut Tito Trindade verfasserin aut Jorge R. Frade verfasserin aut Andrei V. Kovalevsky verfasserin aut In Materials MDPI AG, 2009 13(2020), 3, p 758 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:13 year:2020 number:3, p 758 https://doi.org/10.3390/ma13030758 kostenfrei https://doaj.org/article/1a1cf6aa77ea4e2a852bbaac9020136d kostenfrei https://www.mdpi.com/1996-1944/13/3/758 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 3, p 758
allfieldsGer	10.3390/ma13030758 doi (DE-627)DOAJ017209919 (DE-599)DOAJ1a1cf6aa77ea4e2a852bbaac9020136d DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Diogo Lopes verfasserin aut Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements. photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Ana Luísa Daniel-da-Silva verfasserin aut Artur R. Sarabando verfasserin aut Blanca I. Arias-Serrano verfasserin aut Elena Rodríguez-Aguado verfasserin aut Enrique Rodríguez-Castellón verfasserin aut Tito Trindade verfasserin aut Jorge R. Frade verfasserin aut Andrei V. Kovalevsky verfasserin aut In Materials MDPI AG, 2009 13(2020), 3, p 758 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:13 year:2020 number:3, p 758 https://doi.org/10.3390/ma13030758 kostenfrei https://doaj.org/article/1a1cf6aa77ea4e2a852bbaac9020136d kostenfrei https://www.mdpi.com/1996-1944/13/3/758 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 3, p 758
allfieldsSound	10.3390/ma13030758 doi (DE-627)DOAJ017209919 (DE-599)DOAJ1a1cf6aa77ea4e2a852bbaac9020136d DE-627 ger DE-627 rakwb eng TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Diogo Lopes verfasserin aut Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements. photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics Ana Luísa Daniel-da-Silva verfasserin aut Artur R. Sarabando verfasserin aut Blanca I. Arias-Serrano verfasserin aut Elena Rodríguez-Aguado verfasserin aut Enrique Rodríguez-Castellón verfasserin aut Tito Trindade verfasserin aut Jorge R. Frade verfasserin aut Andrei V. Kovalevsky verfasserin aut In Materials MDPI AG, 2009 13(2020), 3, p 758 (DE-627)595712649 (DE-600)2487261-1 19961944 nnns volume:13 year:2020 number:3, p 758 https://doi.org/10.3390/ma13030758 kostenfrei https://doaj.org/article/1a1cf6aa77ea4e2a852bbaac9020136d kostenfrei https://www.mdpi.com/1996-1944/13/3/758 kostenfrei https://doaj.org/toc/1996-1944 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 3, p 758
language	English
source	In Materials 13(2020), 3, p 758 volume:13 year:2020 number:3, p 758
sourceStr	In Materials 13(2020), 3, p 758 volume:13 year:2020 number:3, p 758
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction Technology T Electrical engineering. Electronics. Nuclear engineering Engineering (General). Civil engineering (General) Microscopy Descriptive and experimental mechanics
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container_title	Materials
authorswithroles_txt_mv	Diogo Lopes @@aut@@ Ana Luísa Daniel-da-Silva @@aut@@ Artur R. Sarabando @@aut@@ Blanca I. Arias-Serrano @@aut@@ Elena Rodríguez-Aguado @@aut@@ Enrique Rodríguez-Castellón @@aut@@ Tito Trindade @@aut@@ Jorge R. Frade @@aut@@ Andrei V. Kovalevsky @@aut@@
publishDateDaySort_date	2020-01-01T00:00:00Z
hierarchy_top_id	595712649
id	DOAJ017209919
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callnumber-first	T - Technology
author	Diogo Lopes
spellingShingle	Diogo Lopes misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc photocatalysis misc tio<sub<2</sub< misc anatase misc silicon carbide misc taguchi plan misc redox reaction misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions
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topic_title	TK1-9971 TA1-2040 QH201-278.5 QC120-168.85 Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions photocatalysis tio<sub<2</sub< anatase silicon carbide taguchi plan redox reaction
topic	misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc photocatalysis misc tio<sub<2</sub< misc anatase misc silicon carbide misc taguchi plan misc redox reaction misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics
topic_unstemmed	misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc photocatalysis misc tio<sub<2</sub< misc anatase misc silicon carbide misc taguchi plan misc redox reaction misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics
topic_browse	misc TK1-9971 misc TA1-2040 misc QH201-278.5 misc QC120-168.85 misc photocatalysis misc tio<sub<2</sub< misc anatase misc silicon carbide misc taguchi plan misc redox reaction misc Technology misc T misc Electrical engineering. Electronics. Nuclear engineering misc Engineering (General). Civil engineering (General) misc Microscopy misc Descriptive and experimental mechanics
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title	Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions
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title_full	Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions
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author_browse	Diogo Lopes Ana Luísa Daniel-da-Silva Artur R. Sarabando Blanca I. Arias-Serrano Elena Rodríguez-Aguado Enrique Rodríguez-Castellón Tito Trindade Jorge R. Frade Andrei V. Kovalevsky
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title_sort	design of multifunctional titania-based photocatalysts by controlled redox reactions
callnumber	TK1-9971
title_auth	Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions
abstract	This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements.
abstractGer	This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements.
abstract_unstemmed	This work aims at the preparation of multifunctional titania-based photocatalysts with inherent capabilities for thermal co-activation and stabilisation of anatase polymorph, by designing the phase composition and microstructure of rutile-silicon carbide mixture. The processing involved a conventional solid state route, including partial pre-reduction of rutile by SiC in inert Ar atmosphere, followed by post-oxidation in air. The impacts of processing conditions on the phase composition and photocatalytic activity were evaluated using Taguchi planning. The XRD studies confirmed the presence of rutile/anatase mixtures in the post-oxidised samples. The results emphasise that pre-reduction and post-oxidation temperatures are critical in defining the phase composition, while post-oxidation time is relevant for the photocatalytic performance. Microstructural studies revealed the formation of core-shell particles, which can suppress the photocatalytic activity. The highest apparent reaction rate of the photodegradation of methylene blue was observed for the sample pre-reduced in Ar at 1300 °C for 5 h and then calcined in air at 400 °C for 25 h. Though its performance was ~1.6-times lower than that for the same amount of nanostructured industrial P25 photocatalyst, it was achieved in the material possessing 2−3 times lower surface area and containing ~50 mol% of SiO<sub<2</sub< and SiC, thus demonstrating excellent prospects for further improvements.
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title_short	Design of Multifunctional Titania-Based Photocatalysts by Controlled Redox Reactions
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