光催化
催化作用
煅烧
草酸盐
草酸钠
硝酸盐
无机化学
硝酸钠
复合数
材料科学
化学
核化学
化学工程
复合材料
有机化学
工程类
作者
Ruicai Jin,Wenliang Gao,Jixin Chen,Haisheng Zeng,Fuxiang Zhang,Zhiguang Liu,Naijia Guan
标识
DOI:10.1016/s1010-6030(03)00420-9
摘要
Photocatalytic reduction of nitrate ions was examined by using Cu/MgTiO3-TiO2 catalyst in the presence of sodium oxalate as hole scavenger. Many factors such as catalyst calcination temperature, Cu:Mg atom molar ratio, different hole scavengers and different concentrations of sodium oxalate were tested to search for the optimal reaction conditions. X-ray diffraction (XRD) and Transmission Electron Micrograph (TEM) were performed to characterize the composite semiconductors catalyst. Our results indicated that Cu/MgTiO3-TiO2 catalyst calcined at 873 K showed the highest photocatalytic activity and nitrate conversion reached 39.2% after 2 h irradiation. The enhanced effect for photocatalytic nitrate reduction activity was most likely to result from the formation of composite semiconductor MgTiO3-TiO2 and the transformation of TiO2 crystalline phase.
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