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

页码：811 / 814

页数：4

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