| 圆盘状Bi2WO6-BiPO4异质结的水热合成及光催化性能 (cited: 1) |
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| 引用本文： | 林雪,郭晓宇,赵世铎,高新,翟宏菊,王庆伟,常立民.圆盘状Bi2WO6-BiPO4异质结的水热合成及光催化性能 (cited: 1)[J].化学物理学报,2014,27(6):725-731. |
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| 作者姓名： | 林雪 郭晓宇 赵世铎 高新 翟宏菊 王庆伟 常立民 |
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| 作者单位： | 吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000,吉林师范大学环境友好材料制备与应用教育部重点实验室，四平 136000 |
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| 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
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| 关 键 词： | 钨酸铋，磷酸铋，异质结，可见光，机制 |
| 收稿时间： | 2014/8/25 0:00:00 |
Hydrothermal Synthesis of Disk-Like Bi2WO6-BiPO4 Heterojunctions and Enhanced Photocatalytic Performance for Rhodamine B Degradation (cited: 1) |
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| Xue Lin,Xiao-yu Guo,Shi-duo Zhao,Xin Gao,Hong-ju Zhai,Qing-wei Wang and Li-min Chang.Hydrothermal Synthesis of Disk-Like Bi2WO6-BiPO4 Heterojunctions and Enhanced Photocatalytic Performance for Rhodamine B Degradation (cited: 1)[J].Chinese Journal of Chemical Physics,2014,27(6):725-731. |
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| Authors: | Xue Lin Xiao-yu Guo Shi-duo Zhao Xin Gao Hong-ju Zhai Qing-wei Wang and Li-min Chang |
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| Institution: | Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China,Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China,Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China,Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China,Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China,Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China and Key Laboratory of Preparation and Application Environmentally Friendly Materials of Ministry of Edu-cation, Jilin Normal University, Siping 136000, China |
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| 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. |
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| Keywords: | Bi2WO6 BiPO4 Heterojunction Photocatalytic activity Mechanism |
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