碳包覆氮掺杂纳米ZnO光催化剂的制备及其可见光活性  

Preparation and visible light activity of carbon coated N-ZnO photocatalyst

作　　者：黄珍 李欢[1,2] 胡海平 甘建昌 陈海燕 彭清琪 刘笑开 王辉虎 HUANG Zhen;LI Huan;HU Haiping;GAN Jianchang;CHEN Haiyan;PENG Qingqi;LIU Xiaokai;WANG Huihu(Hubei Provincial Key Laboratory of Green Materials for Light Industry,Hubei University of Technology,Wuhan 430068,China;School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学绿色轻工材料湖北省重点实验室,武汉430068 [2]湖北工业大学材料与化学工程学院,武汉430068

出　　处：《功能材料》2020年第10期10122-10128,共7页Journal of Functional Materials

基　　金：湖北省教育厅重点资助项目(D20171405)。

摘　　要：以尿素为氮源,纳米ZnO颗粒作为源材料,采用高温煅烧法制备了氮掺杂氧化锌(N-ZnO),并在此基础上,利用葡萄糖水热碳化法制备了氮掺杂碳包覆纳米ZnO光催化剂(C@N-ZnO)。研究结果显示氮掺杂和碳包覆可有效改变纳米ZnO的尺寸与形貌。与纯纳米ZnO颗粒相比,N-ZnO为微米级六角棒状,C@N-ZnO为纳米级圆棒状。C@N-ZnO样品的X射线光电子能谱图证明N成功掺杂进入ZnO晶格中,且N-ZnO表面的C-C键所对应峰明显增强,表明N-ZnO表面成功包覆一层碳层。紫外-可见漫反射吸收光谱显示N-ZnO与C@N-ZnO在可见光区域具有强烈的吸收。以罗丹明B(RhB)作为目标污染物,可见光光催化降解结果显示C@N-ZnO的反应速率常数是纯ZnO的3.4倍,说明氮掺杂和碳包覆能有效提高ZnO的可见光活性。Nitrogen doped zinc oxide(N-ZnO)was prepared by high temperature calcination method with urea as nitrogen source and nano ZnO particles as source material.On this basis,carbon coated N-ZnO photocatalyst(C@N-ZnO)was obtained by hydrothermal carbonation of glucose.The results showed that nitrogen doping and carbon coating could effectively change the size and morphology of nano ZnO.Compared with pure nano ZnO particles,N-ZnO was in the shape of micrometer hexagonal rod,while C@N-ZnO was in the shape of nano round rod.The X-ray photoelectron spectroscopy of C@N-ZnO exhibited that N was successfully doped into the ZnO lattice,and the peaks corresponding to the C-C bond on the N-ZnO surface were significantly enhanced,indicating that a carbon layer was successfully coated on the N-ZnO surface.The UV-vis diffuse reflectance spectrum demonstrated that N-ZnO and C@N-ZnO had strong absorption in the visible region.With Rhodamine B(RhB)as the target pollutant,the reaction rate constant of C@N-ZnO was 3.4 times of that of pure ZnO under visible light irradiation,indicating that nitrogen doping and carbon coating could effectively improve the visible light activity of ZnO.

关 键 词：ZNO 氮掺杂 碳包覆 光催化 

分 类 号：Q643.32[生物学—生物物理学]