光催化下的BiVO_4材料的合成与表征
|
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.
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.
[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.