Photocatalytic reduction of nitrate ions in water over metal-modified TiO2

被引：60
|
作者：
Luiz, Danielle de Bem [1 ,2 ]
Floriani Andersen, Silvia Layara [2 ]
Berger, Carolina [2 ]
Jose, Humberto Jorge [2 ]
Peralta Muniz Moreira, Regina de Fatima [2 ]
机构：
[1] Brazilian Agr Res Corp, Embrapa Fisheries & Aquaculture, BR-77015012 Palmas, TO, Brazil
[2] Univ Fed Santa Catarina, Dept Chem & Food Engn, BR-88040900 Florianopolis, SC, Brazil
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2012年 / 246卷
关键词：
Photocatalysis; Formic acid; Nitrate; Photoreduction; Zn-TiO2; DEGRADATION; CATALYSTS; ACID; MORPHOLOGY; NITROGEN; REMOVAL; TITANIA; CR;
D O I：
10.1016/j.jphotochem.2012.07.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
TiO2 and TiO2 doped with Zn2+, Cu2+ and Cr3+ were used as photocatalysts to reduce nitrate and to oxidize formic acid. The metals were added to the TiO2 support by photodeposition and this method did not affect the form of the original crystalline semiconductor (100% anatase). The data obtained in the structural characterization and in the nitrate photoreduction experiments showed that 1.0 g L-1 4.4% Zn-TiO2 photocatalyst had the highest photocatalytic activity and selectivity toward nitrogen. The selectivity and conversion were higher than 95 and 91%, respectively, using a CHOOH:nitrate molar ratio of 16:1, which is twice the theoretical demand in the absence of dissolved oxygen. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：36 / 44
页数：9
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