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Combinational effect of Pt/SrTiO3:Rh photocatalyst and SnPd/Al2O3 non-photocatalyst for photocatalytic reduction of nitrate to nitrogen in water under visible light irradiation
| Title: | Combinational effect of Pt/SrTiO3:Rh photocatalyst and SnPd/Al2O3 non-photocatalyst for photocatalytic reduction of nitrate to nitrogen in water under visible light irradiation |
| Authors: | Hirayama, Jun Browse this author | | Abe, Ryu Browse this author →KAKEN DB | | Kamiya, Yuichi Browse this author →KAKEN DB |
| Keywords: | Nitrate reduction | | Photocatalyst | | Groundwater purification | | Tin-palladium bimetal |
| Issue Date: | Jan-2014 |
| Publisher: | Elsevier Science B.V. |
| Journal Title: | Applied Catalysis B: Environmental |
| Volume: | 144 |
| Start Page: | 721 |
| End Page: | 729 |
| Publisher DOI: | 10.1016/j.apcatb.2013.08.005 |
| Abstract: | Photocatalytic reduction of nitrate in water in the co-presence of Pt/SrTiO3:Rh and SnPd/Al2O3 under visible light irradiation (lambda > 420 nm) was investigated. This reaction system efficiently and selectively promoted the photocatalytic reduction of nitrate to nitrogen, whereas Pt/SrTiO3:Rh or SnPd/Al2O3 alone showed little activity under the reaction conditions. The selectivity to N-2 was 94% under the optimum reaction conditions, where the amounts of Pt/SrTiO3:Rh and SnPd/Al2O3 loaded in the reaction system were 500 mg and 150 mg, respectively. This reaction system showed a superior nitrate decomposition rate and superior selectivity to nitrogen compared with SrTiO3:Rh directly modified with SnPd bimetal. From analysis of the reaction mechanism, hydrogen formed by photoreduction of water over Pt/SrTiO3:Rh acted as the reductant for a non-photocatalytic nitrate conversion reaction over SnPd/Al2O3. Moreover, the products, including formaldehyde and formic acid, formed by photo-oxidation of methanol over Pt/SrTiO3:Rh acted as reductants for nitrate over SnPd/Al2O3. |
| Rights: | (C) 2013 Elsevier B.V. All rights reserved. |
| Relation: | http://www.sciencedirect.com/science/article/pii/S0926337313005055 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/54112 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 神谷 裕一
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