Cr(VI) photocatalytic reduction under sunlight followed by Cr(III) extraction from TiO2 surface
Cr(VI) photocatalytic reduction under sunlight followed by Cr(III) extraction from TiO2 surface
复制标题
DOI：
10.1016/j.matlet.2016.04.090
复制
发表时间：
2016-08
影响因子：
3
通讯作者：
R. Djellabi;F. Ghorab;Sana Nouacer;A. Smara;Ouahida Khireddine
中科院分区：
文献类型：
--
作者：
R. Djellabi;F. Ghorab;Sana Nouacer;A. Smara;Ouahida Khireddine
本工作的主要目的是提取的Cr（III）从TiO 2表面沉积后，Cr（VI）还原TiO 2太阳能电池。结果表明，在[Cr（VI）]：20 ppm，[TiO 2]：2 g/L，[A.T]：60 ppm和pH：2.2的条件下，以酒石酸（A.T）为空穴清除剂，在自然光照下，2 h后，Cr（VI）被TiO 2完全还原为Cr（III）。生成的Cr（III）分为沉积在TiO 2表面（39.75%）和溶液中（60.25%）。用柠檬酸和EDTA对TiO 2表面进行连续萃取，三次洗涤后Cr（III）的去除率分别为90.13%和42.62%。
The main objective of this work was the extraction of Cr(III) from TiO2surface deposited after Cr(VI) reduction by TiO2solar photocatalysis. The results show that the reduction of Cr(VI) to Cr(III) by TiO2under natural sunlight is total after 2 h using tartaric acid (A.T) as a hole scavenger under the following conditions: [Cr(VI)]: 20 ppm, [TiO2]: 2 g/L, [A.T]: 60 ppm and pH: 2.2. The produced Cr(III) is divided between deposited onto TiO2surface (39.75%) and in the solution (60.25%). The Cr(III) removal from TiO2surface by the sequential extraction after three washing were 90.13% and 42.62% using citric acid and EDTA respectively.