| 水热法合成Ag2CO3/ZnO异质结复合光催化剂及其光催化性能 |
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| 引用本文： | 魏龙福,余长林,陈建钗,樊启哲.水热法合成Ag2CO3/ZnO异质结复合光催化剂及其光催化性能[J].有色金属科学与工程,2014,5(1):47-53. |
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| 作者姓名： | 魏龙福 余长林 陈建钗 樊启哲 |
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| 作者单位： | 1.江西理工大学冶金与化学工程学院，江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金资助项目21067004，21263005江西省自然科学基金青年科学基金计划项目20133BAB21003江西省教育厅科技基金资助项目GJJ12344江西省青年科学家培养项目20122BCB23015 |
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| 摘 要： | 采用水热法合成了一系列不同Ag2CO3含量的新型Ag2CO3/ZnO异质结复合光催化剂, 运用X射线粉末衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫反射吸收光谱(UV-vis DRS)等系列手段对所制备的光催化剂进行了表征, 并以紫外光(254 nm)为光源, 评价了催化剂光催化降解甲基橙的活性, 考察了不同Ag2CO3复合量、不同水热温度对ZnO复合光催化剂反应活性的影响.结果表明, 当Ag2CO3含量为2 %、水热温度为140 ℃, 复合光催化剂具有最大的光催化活性, 降解率达到86.31 %.Ag2CO3/ZnO异质结复合光催化剂具有更高的光催化活性主要原因是复合光催化剂对紫外光有很强的吸收能力, 适量Ag2CO3能提高光生电子-空穴对的分离效率, 并改善催化剂的物理性能.
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| 关 键 词： | 水热法 异质结 复合光催化剂 紫外光 甲基橙 光催化活性 |
| 收稿时间： | 2013-10-30 |
Hydrothermal Synthesis and Photocatalytic Performance of Ag2CO3/ZnO |
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| Affiliation: | 1.School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China2.Fujian Provincial Key Lab of Photocatalysis, Fuzhou University, Fuzhou 350002, China |
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| Abstract: | A series of novel Ag2CO3/ZnO heterostructures composite photocatalysts were synthesized by hydrothermal method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscope (FT-IR), and UV-vis diffuse reflectance spectra, respectively. The photocatalytic activity of the prepared samples was evaluated by photocatalytic degradation of methyl orange (MO) under UV light (λ=254nm) irradiation. The different Ag2CO3 compound quantity and different hydrothermal temperature of ZnO composite photocatalyst were researched. The results show that the photocatalyst prepared with two-percent of Ag2CO3 and 140 ℃ of hydrothermal temperature exhibits the highest photocatalytic activity, owing to the 86.31% of degradation rate. The high photocatalytic performance of the heterostructures composite photocatalysts could be attributed to the strong UV light absorption. A certain amount of Ag2CO3 could improve the separation efficiency of the e-/h+ pairs and the physical property of the catalysts. |
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