CAJ | 학술논문

采用水热法制备了一系列Bi2 WO6/ZnO异质结光催化剂,并对其进行X射线衍射( XRD)、紫外-可见光谱( UV-Vis DRS)、扫描电镜( SEM)、光电子能谱( EDS)等手段对其结构性质进行了表征。在含酚废水的液相反应体系中,研究了异质结Bi2 WO6/ZnO复合光催化剂光催化降解苯酚的性能。结果表明,Bi2 WO6/ZnO异质结的形成可以有效的抑制光生电子和空穴对的结合,使其光催化活性明显优于纯的ZnO和Bi2 WO6；另外,异质结型Bi2 WO6/ZnO 复合光催化剂的表面 OH·自由基更有利于光催化活性的提高。当 Bi2 WO6复合量为4wt%时,异质结Bi2 WO6/ZnO复合光催化剂光催化降解苯酚的效果最佳。
채용수열법제비료일계렬Bi2 WO6/ZnO이질결광최화제,병대기진행X사선연사( XRD)、자외-가견광보( UV-Vis DRS)、소묘전경( SEM)、광전자능보( EDS)등수단대기결구성질진행료표정。재함분폐수적액상반응체계중,연구료이질결Bi2 WO6/ZnO복합광최화제광최화강해분분적성능。결과표명,Bi2 WO6/ZnO이질결적형성가이유효적억제광생전자화공혈대적결합,사기광최화활성명현우우순적ZnO화Bi2 WO6；령외,이질결형Bi2 WO6/ZnO 복합광최화제적표면 OH·자유기경유리우광최화활성적제고。당 Bi2 WO6복합량위4wt%시,이질결Bi2 WO6/ZnO복합광최화제광최화강해분분적효과최가。
A series of Bi2 WO6/ZnO heterojunction photocatalysts were prepared by hydrothermal method and were characterized by X-ray powder diffraction(XRD),UV-vis diffuse reflectance spectroscopy(DRS)and energy dispersive X-ray spectroscopy(EDS) . The photocatalytic activity of the prepared catalysts was evaluated by photocatalytic degradation of phenol. The results show that the photocatalytic activity of Bi2 WO6/ZnO heterojunction photocatalysts was superior to that of pure ZnO and Bi2 WO6 . The formation of Bi2 WO6/ZnO heterojunction could effectively suppress the recombination of the photogenerated electron-hole pairs,which resulted in an increase in photocatalytic activity. Moreover,more surface OH groups of the Bi2 WO6/ZnO heterojunction photo catalysts will further benefit the improvement of photo catalytic activity. The optimal amounts of Bi2 WO6 were 4wt%.