多孔钒酸铋的制备及其光催化性能

Preparation and Photoelectric Properties of Porous Bismuth Vanadate

作为一种新型高效的可见光催化剂,钒酸铋已经成为目前研究人员研究的重点。本实验采用硝酸铋和偏钒酸铵作为反应原料,白炭黑作为模板剂,利用水热反应,制备了不同形貌的钒酸铋材料。光催化降解罗丹明B以及电化学性能均表明当Si与Bi元素摩尔比为1时,材料的光催化性能最好,扫描电子显微镜也表明其具有较为规整的形貌以及较多的孔数,同时,孔富集于特定的晶面,使得富集空穴的表面有更大的接触面积,进而提高了氧化性能。

As a new type of highly efficient visible light catalyst,bismuth vanadate has become the focus of current research. In this experiment,bismuth nitrate and ammonium metavanadate were used as reaction materials,carbon-white was used as a template to prepare bismuth vanadate materials with different morphologies by hydrothermal reaction. Photocatalytic degradation of rhodamine B and electrochemical properties indicated that the photocatalytic performance of the material is best when the molar ratio of Si with Bi is 1. Scanning electron microscopy also showed that it has a more regular morphology with more pores. Also,the pores are concentrated on a specific crystal face,so that the surface enriched in holes has a larger contact area,thereby improving the oxidation performance.