| 热分解制备CeO2-还原氧化石墨烯及其光催化性能 | |
| Preparation and photocatalytic performance of CeO2-reduced graphene oxide by thermal decomposition | |
| 摘要: 通过一步水热法制备了CeCO3OH-rGO (还原氧化石墨烯)，并在氩气(Ar)气氛下焙烧制备得到CeO2-rGO复合材料。采用X射线衍射、扫描电子显微镜、X射线光电子能谱以及紫外可见漫反射光谱(UV-Vis DRS)等研究了复合材料的物相组成、微观形貌、空位缺陷和光电化学特性等。对比研究了不同GO (氧化石墨烯)负载量和NH4HCO3添加量下所制备材料的光催化性能，发现GO负载量为10 mg、NH4HCO3添加量为15 mmol的样品(CeO2-10rGO-15)具有最窄的禁带宽度(3.17 eV)，对亚甲蓝(MB)的光催化降解率达80.66%。适宜的rGO负载量有利于促进CeO2空位缺陷的形成，也有利于光生载流子的分离，进而促进光催化性能。 | |
| 关键词: 二氧化铈 氧化石墨烯 热分解 复合材料 光催化 | |
| 基金项目: 国家自然科学基金(No.52164025)、贵大培育[2019]30号、贵大SRT字(2022)012号资助。 | |
| Abstract: CeCO3OH-rGO (reduced graphene oxide) was prepared by a one-step hydrothermal method, and CeO2-rGO composites were prepared by roasting under argon (Ar) atmosphere. The phase composition, microstructure, vacancy defects, and photoelectrochemical properties of the composites were studied by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV visible diffuse reflectance spectroscopy (UV-Vis DRS), etc. The photocatalytic performance of the composites with different GO (graphene oxide) and NH4HCO3 addition amounts respectively were comparatively studied. It was found that the CeO2-10rGO-15 with GO and NH4HCO3 addition amounts of 10 mg and 15 mmol respectively had the narrowest band-gap width (3.17 eV), and the photocatalytic degradation ratio of methylene blue (MB) could reach 80.66%. It is beneficial to the formation vacancy defect of CeO2 and the separation of photogenic carriers for rGO loading suitably, thus promoting photocatalytic performance. | |
| Keywords: CeO2 graphene oxide thermal decomposition composite photocatalysis | |
| 投稿时间：2024-02-27 修订日期：2024-07-11 | |
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| 王卓,张俊山,杨绍艳,周玲艳,李叶迪,兰苑培.热分解制备CeO2-还原氧化石墨烯及其光催化性能[J].无机化学学报,2024,40(9):1708-1718. | |
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