| 司梦银,崔立峰.ZnO/Bi2WO6异质结的制备及光催化制氢研究[J].有色金属材料与工程,2018,39(1):25-30. |
| ZnO/Bi2WO6异质结的制备及光催化制氢研究 |
| Synthesis of ZnO/Bi2WO6 Heterojunction and Research of Photocatalytic Hydrogen Evolution |
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| DOI：10.13258/j.cnki.nmme.2018.01.005 |
| 中文关键词: 水热法 自组装 光催化制氢 |
| 英文关键词:hydrothermal synthesis self-assembly photocatalytic H2 evolution |
| 基金项目:国家自然科学基金资助项目（3217307008） |
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| 摘要点击次数: 1895 |
| 全文下载次数: 1526 |
| 中文摘要: |
| 试验采用水热法制备出薄片状Bi2WO6，并通过异质外延生长法在Bi2WO6薄片上生长ZnO纳米线微米盘，得到ZnO/Bi2WO6异质结。对样品进行的主要表征有扫描电子显微镜形貌观察、X射线粉末衍射、能谱分析、电化学阻抗谱等。结果表明，ZnO/Bi2WO6异质结由直径约1 μm、厚度为40~60 nm的Bi2WO6微米盘负载ZnO纳米线构成。在可见光下，ZnO/Bi2WO6异质结的光催化制氢性能明显优于纯ZnO及纯Bi2WO6，ZnO/Bi2WO6异质结的稳定性也较高。试验对比了纯Bi2WO6与ZnO/Bi2WO6异质结在可见光下催化制氢的速率，发现ZnO/Bi2WO6异质结的光催化效果明显高于纯Bi2WO6，且当生长母液浓度为8 mM （mmol/L）时，制氢速率最大为12 290.2 μm·mol·h-1·g-1，比纯Bi2WO6提高了2.2倍，在其循环试验18 h后，ZnO/Bi2WO6异质结仍能保持较稳定的制氢速率，保持率达到90%。 |
| 英文摘要: |
| Hydrothermal method was used to synthesize Bi2WO6 sheets, and ZnO/Bi2WO6 heterojunction material was prepared by heteripitaxial growth of ZnO nanorod microdisk on Bi2WO6 sheets.The prepared catalysts were characterized by X-ray powder diffraction,scanning electron microscopy,energy dispersive spectroscopy,electrochemical impedance spectroscopy and UV-visible diffuse reflectance spectroscopy.The results show that ZnO/Bi2WO6 heterojunctions are composed of ZnO nanowire arrays with different sizes and circular Bi2WO6 with diameter of about 1 μm and thickness of 40-60 nm.The photocatalytic activity of ZnO/Bi2WO6 heterogeneous composite photocatalyst is better than that of pure ZnO and pure Bi2WO6.The photocatalytic activity of ZnO/Bi2WO6 heterojunction photocatalyst was significantly higher than that of pure Bi2WO6.When the concentration of the growth solution was 8 mM(mmol/L),the maximum rate of hydrogen production is 12 290.2 μm·mol·h-1·g-1,which is 2.2 times higher than that of pure Bi2WO6,the ZnO/Bi2WO6 heterojunction could maintain certain stability of hydrogen production rate after 18 h,and the retention rate had reached 90%. |
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