BiVO4/Fe/Mt composite for visible-light-driven degradation of acid red 18
BiVO4/Fe/Mt composite for visible-light-driven degradation of acid red 18
复制标题
BiVO4/Fe/Mt 复合材料用于可见光驱动的酸性红 18 降解
DOI：
10.1016/j.clay.2016.04.018
复制
发表时间：
2016-08
影响因子：
5.6
通讯作者：
He Hongping
中科院分区：
文献类型：
--
作者：
Xu Tianyuan;Zhu Runliang;Zhu Jianxi;Liang Xiaoliang;Liu Yun;Xu Yin;He Hongping
采用羟基铁柱撑蒙脱石（Fe/Mt）负载钒酸铋（BiVO 4）的方法，将钒酸盐和铋依次负载到Fe/Mt上，制备了具有高光Fenton催化活性的BiVO 4/Fe/Mt复合材料。采用X射线衍射、电感耦合等离子体质谱、氮吸附-脱附等温线和紫外-可见漫反射光谱研究了所得材料的结构特征。然后，使用酸性红18（AR 18）作为模型污染物在可见光照射下测试所获得的催化剂的光芬顿催化活性。此外，通过高效液相色谱法研究了羟基自由基（自由基dotOH）的浓度。结果表明，BiVO 4不仅负载在Fe/Mt的外表面，而且还负载在Fe/Mt的中间层中。8%BiVO4/Fe/Mt复合材料具有较高的光催化活性，其对AR 18的脱色率、TOC去除率和dotOH自由基的生成量均高于Fe/Mt。BiVO 4/Fe/Mt的高去除率和显著的自由基dotOH生成性能应归因于BiVO 4的存在，其可以通过提供BiVO 4的光生电子来加速Fe 3+还原为Fe 2+。反应180 min后，BiVO 4/Fe/Mt的铁浸出量为0.32 mg/L，远小于Fe/Mt的0.66 mg/L。本工作的结果表明，半导体材料的引入可能是一种可行的方法来提高非均相光芬顿催化剂的光芬顿催化活性。
This work described a strategy for loading bismuth vanadate (BiVO4) on hydroxy-iron pillared montmorillonite (Fe/Mt), in which vanadate and bismuth were successively loaded on Fe/Mt to synthesize a BiVO4/Fe/Mt composite with high photo-Fenton catalytic activity. The structural characteristics of the resulting materials were studied using X-ray diffraction, inductively coupled plasma mass spectrometry, nitrogen adsorption–desorption isotherms, and UV–vis diffuse reflectance spectra. Then, the photo-Fenton catalytic activity of the obtained catalysts was tested using acid red 18 (AR18) as a model contaminant under visible light irradiation. Furthermore, the concentration of hydroxyl radical (radical dotOH) was studied by high performance liquid chromatography. The results indicated that BiVO4loaded not only on the outer surface but also into the interlayers of Fe/Mt. The 8%BiVO4/Fe/Mt composite exhibited high photocatalytic activity, and the decolorization efficiency, TOC removal efficiency of AR18, and the production of radical dotOH by BiVO4/Fe/Mt were higher than those by Fe/Mt. The high removal efficiency of AR18 and remarkable radical dotOH generation performance by BiVO4/Fe/Mt should be attributed to the presence of BiVO4, which can accelerate the reduction of Fe3 +to Fe2 +by providing photo-induced electrons from BiVO4. In addition, the leached amount of Fe from BiVO4/Fe/Mt was 0.32 mg/L after 180 min reaction, much smaller than that from Fe/Mt (0.66 mg/L). The results of this work suggest that the introduction of semiconductor materials may be a feasible way for enhancing the photo-Fenton catalytic activity of heterogeneous photo-Fenton catalysts.
登录
查看更多内容
影响因子：
3.3
作者：
Long, Mingce;Cai, Weimin;Wu, Yahui
通讯作者：
Wu, Yahui
影响因子：
12.8
作者：
D. Karamanis;P. Assimakopoulos
通讯作者：
D. Karamanis;P. Assimakopoulos
影响因子：
11.4
作者：
T. Waite;F. Morel
通讯作者：
T. Waite;F. Morel
影响因子：
11.4
作者：
Feng, JY;Hu, XJ;Yue, PL
通讯作者：
Yue, PL
DOI：
10.1007/s11144-013-0593-y
发表时间：
2013-06
期刊：
Reaction Kinetics, Mechanisms and Catalysis
影响因子：
--
作者：
M. A. León;M. Sergio;J. Bussi
通讯作者：
M. A. León;M. Sergio;J. Bussi