Chromate Reduction on the Novel Hetero-system La2NiO4/TiO2 under Solar Light

被引：0
|
作者：
Lahmar, Hicham [1 ]
Benamira, Messaoud [2 ]
机构：
[1] Jijel Univ, MSBY, Dept Chem, Jijel, Algeria
[2] Jijel Univ, LIME, MSBY, Dept Chem, Jijel, Algeria
来源：
PROCEEDINGS OF 2017 INTERNATIONAL RENEWABLE & SUSTAINABLE ENERGY CONFERENCE (IRSEC' 17) | 2017年
关键词：
La2NiO4/TiO2; Hetero-system; Chromate; Solar light;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The removal of hexavalent chromium Cr(VI) from aqueous solutions is successfully achieved over the new hetero-system La2NiO4/TiO2 at pH similar to 4 under solar light. La2NiO4 was found to be a direct band gap semiconductor with an optical transition of 1.30 eV. The photo-electrochemical characterization of the sensitizer La2NiO4 is undertaken to predict the electrons injection in TiO2 which acts as electrons Bridge to adsorbed HCrO4-. This compound presents a p-type semiconductor with a flat band potential of 0.18 V-SCE, more cathodic than that of TiO2. The photoactivity is strongly enhanced in the presence of oxalic acid as hole scavenger. The saturation is due to Cr3+ oxidation by photoholes and the competitive water reduction. The re-utilization shows a negligible deactivation effect and the hetero-system could be promising for increasing the quality of water.
引用
收藏
页码：811 / 814
页数：4
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