Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route
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2016
Authors
Albrbar, Asma JumaĐokić, Veljko
Bjelajac, Anđelika
Kovač, Janez
Ćirković, Jovana
Mitrić, Miodrag
Janaćković, Đorđe
Petrović, Rada
Article (Published version)
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Visible-light active mesoporous N,S-doped and co-doped anatase TiO2 powders were synthesized by non-hydrolytic sol-gel route, starting from TiCl4 and Ti((OPr)-Pr-i)(4) dissolved in cyclohexane or dimethyl sulfoxide, later used as a S-doping agent. After drying in an inert atmosphere, the gels were annealed at 500 degrees C for 3 h, in air or ammonia flow, later used for N-doping. The undoped titania powder, obtained by annealing in air of the cyclohexane-based gel, was also annealed in ammonia to deduce which method is more efficient for N-doping: gel or powder annealing. The post-annealing in air after annealing in ammonia was optimized to attain the best photocatalytic activity for dye degradation under simulated visible light. The size of anatase nanocrystals decreased by doping and the specific surface area of the powders increased. The XPS analysis confirmed a successful substitution of Ti4+ by S(4+) and/or S(6+), which caused a very small band-gap narrowing. The gel annealing in ...ammonia was much more efficient for interstitial nitrogen incorporation in TiO2 lattice than the powder annealing. The annealing in ammonia of the gel synthesized with dimethyl sulfoxide provided the highest visible-light activity owing to high specific surface area, appropriate mesoporosity and high photoabsorption due to efficient N,S co-doping.
Keywords:
Visible-light photocatalytic activity / Non-hydrolytic sol-gel processing / Mesoporosity / N,S-doped TiO2Source:
Ceramics International, 2016, 42, 15, 16718-16728Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
DOI: 10.1016/j.ceramint.2016.07.144
ISSN: 0272-8842
WoS: 000384784100039
Scopus: 2-s2.0-85027948248
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Tehnološko-metalurški fakultetTY - JOUR AU - Albrbar, Asma Juma AU - Đokić, Veljko AU - Bjelajac, Anđelika AU - Kovač, Janez AU - Ćirković, Jovana AU - Mitrić, Miodrag AU - Janaćković, Đorđe AU - Petrović, Rada PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3330 AB - Visible-light active mesoporous N,S-doped and co-doped anatase TiO2 powders were synthesized by non-hydrolytic sol-gel route, starting from TiCl4 and Ti((OPr)-Pr-i)(4) dissolved in cyclohexane or dimethyl sulfoxide, later used as a S-doping agent. After drying in an inert atmosphere, the gels were annealed at 500 degrees C for 3 h, in air or ammonia flow, later used for N-doping. The undoped titania powder, obtained by annealing in air of the cyclohexane-based gel, was also annealed in ammonia to deduce which method is more efficient for N-doping: gel or powder annealing. The post-annealing in air after annealing in ammonia was optimized to attain the best photocatalytic activity for dye degradation under simulated visible light. The size of anatase nanocrystals decreased by doping and the specific surface area of the powders increased. The XPS analysis confirmed a successful substitution of Ti4+ by S(4+) and/or S(6+), which caused a very small band-gap narrowing. The gel annealing in ammonia was much more efficient for interstitial nitrogen incorporation in TiO2 lattice than the powder annealing. The annealing in ammonia of the gel synthesized with dimethyl sulfoxide provided the highest visible-light activity owing to high specific surface area, appropriate mesoporosity and high photoabsorption due to efficient N,S co-doping. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route EP - 16728 IS - 15 SP - 16718 VL - 42 DO - 10.1016/j.ceramint.2016.07.144 ER -
@article{ author = "Albrbar, Asma Juma and Đokić, Veljko and Bjelajac, Anđelika and Kovač, Janez and Ćirković, Jovana and Mitrić, Miodrag and Janaćković, Đorđe and Petrović, Rada", year = "2016", abstract = "Visible-light active mesoporous N,S-doped and co-doped anatase TiO2 powders were synthesized by non-hydrolytic sol-gel route, starting from TiCl4 and Ti((OPr)-Pr-i)(4) dissolved in cyclohexane or dimethyl sulfoxide, later used as a S-doping agent. After drying in an inert atmosphere, the gels were annealed at 500 degrees C for 3 h, in air or ammonia flow, later used for N-doping. The undoped titania powder, obtained by annealing in air of the cyclohexane-based gel, was also annealed in ammonia to deduce which method is more efficient for N-doping: gel or powder annealing. The post-annealing in air after annealing in ammonia was optimized to attain the best photocatalytic activity for dye degradation under simulated visible light. The size of anatase nanocrystals decreased by doping and the specific surface area of the powders increased. The XPS analysis confirmed a successful substitution of Ti4+ by S(4+) and/or S(6+), which caused a very small band-gap narrowing. The gel annealing in ammonia was much more efficient for interstitial nitrogen incorporation in TiO2 lattice than the powder annealing. The annealing in ammonia of the gel synthesized with dimethyl sulfoxide provided the highest visible-light activity owing to high specific surface area, appropriate mesoporosity and high photoabsorption due to efficient N,S co-doping.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route", pages = "16728-16718", number = "15", volume = "42", doi = "10.1016/j.ceramint.2016.07.144" }
Albrbar, A. J., Đokić, V., Bjelajac, A., Kovač, J., Ćirković, J., Mitrić, M., Janaćković, Đ.,& Petrović, R.. (2016). Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route. in Ceramics International Elsevier Sci Ltd, Oxford., 42(15), 16718-16728. https://doi.org/10.1016/j.ceramint.2016.07.144
Albrbar AJ, Đokić V, Bjelajac A, Kovač J, Ćirković J, Mitrić M, Janaćković Đ, Petrović R. Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route. in Ceramics International. 2016;42(15):16718-16728. doi:10.1016/j.ceramint.2016.07.144 .
Albrbar, Asma Juma, Đokić, Veljko, Bjelajac, Anđelika, Kovač, Janez, Ćirković, Jovana, Mitrić, Miodrag, Janaćković, Đorđe, Petrović, Rada, "Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route" in Ceramics International, 42, no. 15 (2016):16718-16728, https://doi.org/10.1016/j.ceramint.2016.07.144 . .