CNQDs/TiO_(2)空心球的制备及光催化性能研究  

Preparation and photocatalytic performance of CNQDs/TiO_(2) hollow spheres

作　　者：薛震坤 王飞 高敏杰 游飞 刘宝玉 Xue Zhenkun;Wang Fei;Gao Minjie;You Fei;Liu Baoyu(College of Light Industry and Chemical Engineering,Guangdong University of Technology,Guangzhou 510006;Institute of Chemical Engineering,Guangdong Academy of Sciences,Guangzhou 510665)

机构地区：[1]广东工业大学,广州510006 [2]广东省科学院化工研究所,广州510665

出　　处：《化工新型材料》2023年第6期137-143,共7页New Chemical Materials

基　　金：广东省科学院发展专项资金项目(2022GDASZH-2022010109);广东省科学院建设国内一流研究机构行动专项资金项目(2020GDASYL-20200503001-06);肇庆市科技计划项目(202004030115);肇庆市科技创新指导类项目基础研究及社会发展专题(202004030115)。

摘　　要：传统单相TiO_(2)在光催化过程中存在光生载流子复合率高、能带较宽、水相中易团聚等特点。为了提高TiO_(2)的光催化效率,利用简易水热法将氮化碳量子点(CNQDs)负载在TiO_(2)空心球(K-T)上制成CNQDs/TiO_(2)复合材料,并用X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-Vis DRS)对样品进行了表征,通过光催化降解罗丹明B(RhB)、对氯苯酚(4-CP)研究了不同CNQDs负载量对CNQDs/K-T复合材料光催化性能的影响。结果表明:利用简易水热法制备了CNQDs/K-T复合材料,其表现出高光催化反应活性且具有良好的稳定性。当CNQDs负载质量为1%时,复合材料对罗丹明B(RhB)和对氯苯酚(4-CP)的光催化降解效率约为传统单相TiO_(2)的3.0倍和3.4倍。Traditional single-phase TiO_(2) has the characteristics of high recombination rate of photogenerated carriers,wide energy band,and easy agglomeration in aqueous phase during photocatalytic process.In order to improve the photocatalytic efficiency of TiO_(2),the carbon nitride quantum dots(CNQDs)were loaded on TiO_(2) hollow spheres(K-T)by hydrothermal method to prepare CNQDs/TiO_(2) composites.The samples were characterized by X-ray powder diffraction(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS).The effects of different CNQDs loadings on the photocatalytic performance of CNQDs/K-T composites were investigated by photocatalytic degradation of rhodamine B(RhB)and p-chlorophenol(4-CP).The experimental results showed that the CNQDs/K-T composites were prepared by simple hydrothermal method and exhibited high photocatalytic reactivity and good stability.When the CNQDs loading was 1wt%,the photocatalytic degradation efficiency of the composites was about 3.0 and 3.4 times higher than that of traditional single-phase TiO_(2) for the degradation of rhodamine B(RhB)and p-chlorophenol(4-CP),respectively.

关 键 词：光催化 氮化碳量子点 二氧化钛空心球 复合材料 降解 

分 类 号：O643.36[理学—物理化学]