| g-C3N4/BiVO4复合催化剂的制备及应用于光催化还原CO2的性能 |
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| 引用本文： | 黄艳,傅敏,贺涛.g-C3N4/BiVO4复合催化剂的制备及应用于光催化还原CO2的性能[J].物理化学学报,2015,31(6):1145-1152. |
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| 作者姓名： | 黄艳 傅敏 贺涛 |
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| 作者单位： | 1 重庆工商大学环境与生物工程学院, 催化与功能有机分子重庆市重点实验室, 重庆400067;
2 国家纳米科学中心, 中国科学院纳米系统与多级次制造重点实验室, 北京100190 |
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| 基金项目： | The project was supported by the Ministry of Science and Technology of China (2015DFG62610). |
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| 摘 要： | 用简单的超声分散法合成了具有可见光响应的类石墨氮化碳(g-C3N4)/BiVO4复合光催化剂. 采用X射线衍射(XRD), X射线光电子能谱(XPS), 扫描电子显微镜(SEM), 透射电子显微镜(TEM), 紫外-可见(UV-Vis)分光光谱, 傅里叶红外变换(FTIR)光谱, 荧光发射谱(PL)和光电流响应等技术对所制备催化剂进行相关表征. 通过可见光下(λ> 420 nm)光催化还原CO2的性能来评价样品的光催化活性, 发现不同复合比的催化剂中, 含40% (w) g-C3N4的复合催化剂表现出最高的光催化活性, 其催化活性分别为纯g-C3N4纳米片和纯BiVO4的催化活性的2倍和4倍.光催化活性增加的主要原因是g-C3N4和BiVO4之间形成了异质结, 且相互间能级匹配, 有利于光生电子和空穴的分离.
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| 关 键 词： | 光催化 CO2转化 甲烷 氮化碳 钒酸铋 |
| 收稿时间： | 2015-02-09 |
Synthesis of g-C3N4/BiVO4 Nanocomposite Photocatalyst and Its Application in Photocatalytic Reduction of CO2 |
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| HUANG Yan,FU Min,HE Tao.Synthesis of g-C3N4/BiVO4 Nanocomposite Photocatalyst and Its Application in Photocatalytic Reduction of CO2[J].Acta Physico-Chimica Sinica,2015,31(6):1145-1152. |
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| Authors: | HUANG Yan FU Min HE Tao |
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| Affiliation: | 1.Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, College of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing 400067, P. R. China;2.CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China |
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| Abstract: | A visible-light-active graphitic-like carbon nitride (g-C3N4)/BiVO4 nanocomposite photocatalyst was synthesized using a facile ultrasonic dispersion method. The nanocomposite was characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence (PL) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and photocurrent response measurements. The photocatalytic activity in the photoreduction of CO2 under visible-light irradiation (λ>420 nm) was determined. The g-C3N4/BiVO4 catalyst containing 40% (w) g-C3N4 showed the highest photocatalytic activity; it was almost twice that of g-C3N4 nanosheets and four times that of BiVO4. The enhanced photocatalytic activity is attributed to the formation of heterostructures at the g-C3N4/BiVO4 interface and appropriate alignment of the energy levels between them, which can facilitate separation of photogenerated electrons and holes. |
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| Keywords: | Photocatalysis CO2 conversion Methane Carbon nitride Bismuth vanadate |
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