WO_(3)/g-C_(3)N_(4)复合光催化剂制备及其可见光催化性能  

Preparation and visible light catalytic performance of WO_(3)/g-C_(3)N_(4) composite photocatalyst

作　　者：黄有鹏 吴福礼 李兵[2] 杨本宏[2] Youpeng HUANG;Fuli WU;Bing LI;Benhong YANG(School of Biology Food and Environmental Engineering,Hefei University,Hefei 230601,China;School of Energy Materials and Chemical Engineering,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院生物食品与环境学院,合肥230601 [2]合肥学院能源材料与化工学院,合肥230601

出　　处：《复合材料学报》2021年第12期4265-4272,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51403048);合肥学院研究生创新研究项目(CX201906)。

摘　　要：将自制层状石墨相氮化碳(g-C_(3)N_(4))和WO_(3)纳米片均匀混合,经煅烧制备WO_(3)/g-C_(3)N_(4)复合半导体。利用XRD、SEM、TEM、UV-Vis DRS和PL对其进行表征。结果表明,g-C_(3)N_(4)呈现类石墨烯状片层结构,WO_(3)为纳米片状结构,且分散在g-C_(3)N_(4)表面;与WO_(3)复合后,UV-Vis吸收边发生了红移,拓宽了g-C_(3)N_(4)对可见光的响应。以罗丹明B(RhB)为模拟污染物,考察WO_(3)/g-C_(3)N_(4)的光催化降解性能。WO_(3)/g-C_(3)N_(4)质量比为1∶5时,表现出最佳的光催化活性,可见光照60 min后,RhB降解率可达到94.9%。光催化剂具有良好的稳定性,重复使用6次后,RhB的降解率依然达到88.9%。光催化机制研究表明,超氧自由基(·O^(−)_(2))是光催化降解RhB的主要活性物种。The WO_(3)/graphite phase carbon nitride(g-C_(3)N_(4))composites were prepared by mixing self-made layered g-C_(3)N_(4) with WO_(3) nanoplates and afterward calcination process,and were characterized by XRD,SEM,TEM,UV-Vis DRS and PL.The results show that g-C_(3)N_(4) presents graphene-like layered structure,and WO_(3) indicates nanoplate structure,and scatters on the surfaces of g-C_(3)N_(4).After compounding with WO_(3),the absorption edge of UV-Vis spectrum shifts to red,which widens the response of g-C_(3)N_(4) to visible light.The photocatalytic degradation properties of WO_(3)/g-C_(3)N_(4) were examined using rodamine B(RhB)as a simulated pollutant.When the mass ratio of WO_(3)/g-C_(3)N_(4) is 1∶5,the best photocatalytic activity is obtained.After 60 min of visible light irradiation,the degradation rate of RhB can reach 94.9%.The photocatalyst shows good stability,as the photodegradation rate of RhB reaches 88.9%after repeated use of the same photocatalyst for 6 times.The study of photocatalytic mechanism shows that superoxide radical(·O^(−)_(2))is the main active species for photocatalytic degradation of RhB.

关 键 词：WO_(3)/g-C_(3)N_(4) 复合半导体 罗丹明B 光催化降解 纳米片 

分 类 号：O643.3[理学—物理化学]