负载型CoS_(2)/Bi_(2)WO_(6)的制备及其光催化性能研究  

Preparation and Photocatalytic Properties of Loaded CoS_(2)/Bi_(2)WO_(6)

作　　者：马鑫 钱湘 范小强 马江权[1] MA Xin;QIAN Xiang;FAN Xiaoqiang;MA Jiangquan(Jiangsu Province Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏省先进催化与绿色制造协同创新中心,常州大学石油化工学院,江苏常州213164

出　　处：《化学反应工程与工艺》2020年第4期297-306,共10页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(51070226);江苏省研究生研究与实践创新计划(KYCX19-1780)。

摘　　要：选择钨酸铋(Bi_(2)WO_(6))和金属硫化物(CoS_(2))为原料,通过水热法合成一种新型可见光响应的异质结钨酸铋CoS_(2)/Bi_(2)WO_(6)复合光催化剂。采用扫描X射线衍射(XRD),扫描电子显微镜(SEM),X射线光电子能谱(XPS),Brunaue-Emmett-Teller(BET),光致发光(PL)和紫外-可见光漫射(UV-DRS)等分析手段对目标光催化剂的结构和性能进行了表征。结果表明:CoS_(2)成功地负载在Bi_(2)WO_(6)表面上形成了CoS2/Bi2WO6异质结,促进了光生电子和空穴的分离,扩大了光吸收范围,并提高了复合催化剂在可见光下的光催化活性。可见光下CoS_(2)/Bi_(2)WO_(6)-0.3%样品催化活性最佳,在180 min内对亚甲基蓝的降解率达到97.71%,表明CoS2/Bi2WO6复合材料是一种新型的具有高催化效率的光催化剂。A novel visible-light-responsive heterojunction bismuth tungstate(CoS_(2)/Bi_(2)WO_(6))composite photocatalyst was synthesized from bismuth tungstate(Bi_(2)WO_(6))and metal sulfide(CoS_(2))by a hydrothermal method.The structure and properties of the prepared photocatalysts were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Brunaue-Emmett-Teller(BET),photoluminescence(PL)and ultraviolet-visible light diffusion(UV-DRS).The results showed that CoS_(2) was successfully loaded on the surface of Bi_(2)WO_(6) to form CoS_(2)/Bi_(2)WO_(6) heterojunction,which promoted the separation of photo-generated electrons and holes,expanded the light absorption range,and improved the photocatalytic activity of the composite catalyst under visible light.The CoS_(2)/Bi_(2)WO_(6)-0.3%sample showed the best catalytic activity and the degradation ratio of MB reached 97.71%within 180 min under visible light,which indicated that CoS_(2)/Bi_(2)WO_(6) composite material was a new type of photocatalyst with high catalytic efficiency.

关 键 词：钨酸铋 硫化钴 异质结 光催化剂 亚甲基蓝 降解反应 

分 类 号：X703[环境科学与工程—环境工程] O643.3[理学—物理化学]