摘要
围绕目前常用的处理化学污染的方法存在效率低、易产生二次污染、消耗能量高等问题,针对现在被人们普遍关注的具有能隙窄、可见光催化活性高等优点的新型可见光响应型光催化材料钒酸饿(BiVO_4),提出采用水热法合成BiVO_4光催化材料,通过对合成的样品进行XRD、SEM表征,以罗丹明B为催化降解剂,添加物质的量比不同的CTAB。在可见光下,探究BiVO_4的光催化活性性能。实验研究表明,反应物物质的量比n(Bi)∶n(V)∶n(CTAB)是1∶1∶1,温度180℃、时间24h的条件下可制备出结晶良好的片状BiVO_4晶体,且制备的样品具有最优的光催化性能。
There are problems such as low efficiency,secondary pollution and high energy consumption in the commonly used methods to deal with chemical pollution.Bismuth vanadate(BiVO_4),as a new photocatalytic material responsive to visible light,has been widely concerned due to its advantages of narrow energy gap and high visible light catalytic activity.In this paper,BiVO_4 photocatalytic materials are synthesized by hydrothermal synthesis,and the synthesized samples are characterized by XRD and SEM.Rhodamine B is used as the catalytic degradation agent,and CTAB with different mole ratios has been added to explore the photocatalytic activity of BiVO_4 in visible light.Experimental study shows that with the conditions of the ratio of reactants n(Bi)∶n(V)∶n(CTAB)=1∶1∶1,the temperature is 180 ℃,the time of 24 h,good flake BiVO_4 crystals can be prepared with good crystallization,and the preparation sample has the best photocatalytic propertiy.
引文
[1]高晓波.不同形貌钒酸铋纳米材料的可控制备及光催化性能研究[D].郑州:河南师范大学,2013.
[2]Tributsch Helmut.Photovoltaic hydrogen generation[J].International Journal of Hydrogen Energy,2008,33(21):5911-5930.
[3]白雪.钒酸铋光催化材料的制备与性能调控[D].北京:北京工业大学,2012.
[4]Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38.
[5]Han X G,Kuang Q,Jin M,et al.Synthesis of Titania Nanosheets with a Large Percentage of Exposed(001)Facets and Related Photocatalytic Properties[J].J.Am.Chem.Soc.,2009,131:3152.
[6]郑皓心,朱丽伟.纳米钒酸锌的制备及表面特性研究[J].黑龙江科技信息,2013,11(5):
[7]高善民,乔青安,赵培培,等.沉淀法制备不同形貌和结构的纳米BiVO4[J].无机化学学报,2007,23(7):1153-115.
[8]周建伟,黄建新,李洁,等.纳米钒酸铋的制备表征及光催化性能研究[J].化学试剂,2009,31(3):169-172.