| 马占营.TiO2/Bi2WO6纳米异质结的制备及其可见光光催化性能[J].分子催化,2016,30(6):575-582 |
| TiO2/Bi2WO6纳米异质结的制备及其可见光光催化性能 |
| Preparation and Visible-light-driven Photocatalytic Performance of TiO2/Bi2WO6 Nano-heterostructure |
| 投稿时间：2016-07-12 修订日期：2016-12-03 |
| DOI： |
| 中文关键词: Bi2WO6 TiO2 异质结 光催化 |
| 英文关键词:Bi2WO6 TiO2 Heterostructure Photocatalysis |
| 基金项目: |
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| 摘要点击次数: 1752 |
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| 中文摘要: |
| 采用共沉淀法制备了不同Ti/Bi摩尔比的TiO2/Bi2WO6纳米异质结可见光光催化剂。采用XRD、HR-TEM、EDS、XPS及UV-vis DRS测试技术对样品的晶相结构、微观形貌、组成及吸光性能等进行了表征分析。以MB模拟环境污染物，考察了TiO2/Bi2WO6纳米异质结的可见光光催化活性。结果表明，当热处理温度为700℃，n(Ti):n(Bi) 的比值为1:5.4，可见光照射180 min时，TiO2/Bi2WO6纳米异质结对MB的降解率达80.0%，是纯Bi2WO6的12倍。光催化活性的提高可归因于TiO2与Bi2WO6复合后可以产生能带交叠效应，从而促进光生电子-空穴对的有效分离。 |
| 英文摘要: |
| TiO2/Bi2WO6 Nano-heterostructures with different Ti/Bi molar ratio were successfully prepared by a simple co-precipitation method. The crystal structure, morphology, constitute and photo-absorbance of the obtained samples were characterized by XRD、HR-TEM、EDS、XPS and UV-vis DRS techniques. The photocatalytic performance of the TiO2/Bi2WO6 nano-heterostructure was evaluated by degradation of methylene blue (MB) solution under visible light irradiation. Results indicated that when calcination temperature was 700℃and n(Ti):n(Bi) = 1:5.4, TiO2/Bi2WO6 can achieve the decomposition of about 80.0% MB in 180 min, which was as 12 times as that of pure Bi2WO6. The enhanced performance could be attributed to band overlap effect of TiO2 and Bi2WO6, which promoted the effective separation of photogenerated charges. |
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