| Z型Ag-Cu2O/BiVO4光催化剂的光催化还原CO2性能 |
| Photocatalytic CO2 reduction performance of Z-scheme Ag-Cu2O/BiVO4 photocatalyst |
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| 摘要: 利用简单的化学还原沉积法将Cu2O纳米球和Ag纳米颗粒均匀包裹在十面体BiVO4表面，成功构建了一种具有高效电荷载流子分离/转移特性的Z型异质结光催化剂Ag-Cu2O/BiVO4。Ag-Cu2O/BiVO4在可见光下光催化CO2还原为CO的产率可达5.37 μmol·g-1·h-1，分别是纯BiVO4和Cu2O的35.8倍和6.25倍。通过X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、X射线能谱(EDS)、紫外可见漫反射光谱(UV-Vis DRS)、光致发光(PL)光谱、瞬态光电流响应(TPC)和电化学阻抗谱(EIS)对Ag-Cu2O/BiVO4的晶体结构、形貌、组成、能带结构和吸光能力等进行了系统表征分析，并提出了其光催化体系还原CO2的催化机理。 |
| 关键词: Ag-Cu2O/BiVO4 Z型异质结 光催化CO2还原 可见光照射 |
| 基金项目: 国家自然科学基金（No.21776317）、湖南省自然科学基金（No.2021JJ30787）和中南大学中央高校基本科研业务费专项资金（No.1053320210679）资助。 |
| Abstract: A Z-scheme heterojunction photocatalyst Ag-Cu2O/BiVO4 was successfully constructed with effective charge carrier separation/transfer by uniformly encapsulating Cu2O nanospheres and Ag nanoparticles on the surface of decahedral BiVO4 using a simple chemical reduction deposition strategy. The photo-reduction of carbon dioxide reaction result indicated that the as-prepared Ag-Cu2O/BiVO4 heterostructure exhibited excellent activity of photo-reduction CO2 with the CO yield of 5.37 μmol·g-1·h-1, about 35.8 times and 6.25 times of original BiVO4 and Cu2O, respectively. Ag-Cu2O/BiVO4 was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), UV-Vis diffuse reflectance absorption spectra (UV-Vis DRS), photoluminescence (PL) spectra, transient photocurrent responses (TPC), and electrochemical impedance spectroscopy (EIS), and the possible reaction mechanism for the reduction of CO2 in the photocatalytic system was proposed. |
| Keywords: Ag-Cu2O/BiVO4 Z-scheme heterojunction photocatalytic CO2 reduction visible light irradiation |
| 投稿时间：2023-11-20 修订日期：2024-03-21 |
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| 杨懿,王爽,王文丹,陈立妙.Z型Ag-Cu2O/BiVO4光催化剂的光催化还原CO2性能[J].无机化学学报,2024,40(5):895-906. |
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