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Hydrothermal Synthesis of Disk-Like Bi2WO6-BiPO4 Heterojunctions and Enhanced Photocatalytic Performance for Rhodamine B Degradation (cited: 1)
Xue Lin*,Xiao-yu Guo,Shi-duo Zhao,Xin Gao,Hong-ju Zhai,Qing-wei Wang*,Li-min Chang
Author NameAffiliationE-mail
Xue Lin* Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China jlsdlinxue@126.com 
Xiao-yu Guo Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Shi-duo Zhao Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Xin Gao Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Hong-ju Zhai Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Qing-wei Wang* Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Li-min Chang Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China  
Abstract:
Novel Bi2WO6-BiPO4 photocatalysts with heterojunction structure were fabricated through a facile hydrothermal route. The photocatalytic properties of Bi2WO6-BiPO4 composites were evaluated by photocatalytic degradation of rhodamine B (Rh B) under simulated sunlight irradiation. The results showed that Bi2WO6-BiPO4 photocatalysts displayed much higher photocatalytic performances for Rh B degradation than the single BiPO4 and Bi2WO6. The best photocatalytic activity of Bi2WO6-BiPO4 with nearly 100% Rh B degradation located at molar ratio of 1:1 after 20 min irradiation. The enhanced photo-catalytic performance could be mainly ascribed to the formation of heterojunction interface in Bi2WO6-BiPO4 which facilitated the transfer and separation of photogenerated electron-hole pairs, as well as the strong visible light absorption originating from the sensitization role of Bi2WO6 to BiPO4. It was also found that the photodegradation of Rh B molecules was mainly attributed to the oxidation action of the generated 2· - radicals and partly to the action of h+ vb via direct hole oxidation process.
Key words:  Bi2WO6, BiPO4, Heterojunction, Photocatalytic activity, Mechanism
FundProject:
圆盘状Bi2WO6-BiPO4异质结的水热合成及光催化性能 (cited: 1)
林雪*,郭晓宇,赵世铎,高新,翟宏菊,王庆伟*,常立民
摘要:
采用水热法制备Bi2WO6-BiPO4异质结光催化剂.利用模拟太阳光照射下的罗丹明B降解实验评价了Bi2WO6-BiPO4复合物的光催化性能.结果表明,Bi2WO6-BiPO4光催化活性比Bi2WO6和BiPO4高得多.当Bi2WO6与BiPO4的摩尔比为1:1时复合光催化剂对罗丹明B的降解率最高.Bi2WO6-BiPO4催化活性增强主要归结为两者之间形成了有效的异质结结构,其内建电场能够促进光生载流子的分离.同时,Bi2WO6的加入增强了其对可见光的吸收.研究表明O2· -和h+在光催化降解过程中是主要的活性物种
关键词:  钨酸铋,磷酸铋,异质结,可见光,机制
DOI:10.1063/1674-0068/27/06/725-731
分类号: