Enhanced photocatalytic treatment of Cr(VI) and phenol by monoclinic BiVO4 with {010}-orientation growth
Enhanced photocatalytic treatment of Cr(VI) and phenol by monoclinic BiVO4 with {010}-orientation growth
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单斜 BiVO4 {010} 取向生长增强光催化处理 Cr(VI) 和苯酚
DOI：
10.1016/j.materresbull.2018.07.033
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发表时间：
2018-11
影响因子：
5.4
通讯作者：
Xin Tan
中科院分区：
文献类型：
--
作者：
Tao Yu;Luyang Lv;Hongmei Wang;Xin Tan
光催化技术在处理含铬有机废水方面具有独特的优势。同时，以{010}为取向生长的BiVO4催化剂显著提高了铬(VI)和苯酚的光降解效率。在对材料物性进行表征的基础上，系统分析了pH值对铬(VI)光还原反应的影响以及苯酚浓度对同时光催化反应过程的影响。结果表明，在以{010}为取向的BiVO4上，光催化活性的提高归因于充分利用了{010}和{110}之间的表面结。这些结实现了更高的分离效率和光生载流子在两个表面之间的选择性转移。因此，铬(VI)的光还原和苯酚的光氧化可以选择性地发生在不同的晶面上。本研究论证了利用光催化技术净化含铬(VI)等有毒重金属有机废水的可能性，为高活性光催化材料的设计提供了新的思路和方法。
Photocatalytic technology has unique advantages in the purification of organic wastewater containing chromium(VI). Simultaneously photodegradation efficiency of Cr(VI) and phenol was significantly enhanced over BiVO4with {010}-oriented growth. In this study, the effect of pH values in photoreduction of Cr(VI) and concentrations of phenol in the simultaneous photocatalytic reaction process were systematically analyzed based on characterizations about material physical properties. The results suggested that the enhanced photocatalytic activity over {010}-oriented BiVO4was attributed to sufficient utilization of surface junction between {010} and {110}. These junctions achieved higher separation efficiency and selectively transfer of photogenerated charge carriers between two surfaces. Thus the photoreduction of Cr(VI) and photooxidation of phenol can selectively occur on the different crystal surfaces. This study demonstrates the possibility of purification of organic wastewater containing toxic heavy metals such as Cr(VI) using photocatalytic technology and provides new ideas and methods for the design of highly active photocatalytic materials.
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