CDs/TiO₂纳米复合材料吸光度依赖的光催化活性研究  

Absorbance-Dependent Photocatalytic Activity of CDs/TiO2 Nanocomposites

作　　者：李昱璇 张蕾[1] 孙明烨 

机构地区：[1]牡丹江师范学院物理与电子工程学院,黑龙江 牡丹江

出　　处：《材料科学》2025年第2期281-289,共9页Material Sciences

基　　金：此项工作得到了牡丹江师范学院科研项目(GP2021003),黑龙江省省属高等学校基本科研业务费项目(1451ZD007)和黑龙江省自然科学基金联合基金培育项目(PL2024F024)的支持。

摘　　要：本文采用水热法合成了具有不同吸光度的碳点(CDs),研究CDs吸光度对CDs/TiO2纳米复合材料光催化活性的影响。利用透射电子显微镜、傅里叶变换红外光谱仪、X射线光电子能谱仪对CDs/TiO2纳米复合材料的结构、形貌和化学组成进行了表征,并在太阳光照射下以Rh B水溶液为模拟污染物,监测CDs/TiO2纳米复合材料对Rh B的降解情况。结果表明,改变CDs的吸收度可以影响TiO2的光催化性能,来自碳核的本征吸收有助于提升光催化活性,而来自表面态的长拖尾吸收不利于光催化。此外,CDs的吸附量可以很大程度上影响染料降解效率。In this paper, carbon dots (CDs) with different absorbances are synthesized by hydrothermal method, and the effect of the absorbance of CDs on the photocatalytic activity of CDs/TiO2 nanocomposites is studied. The structure, morphology and chemical composition of CDs/TiO2 nanocomposites are characterized by transmission electron microscopy, Fourier transform infrared spectrometer and X-ray photoelectron spectrometer. The degradation of Rh B by CDs/TiO2 nanocomposites is monitored by using Rh B aqueous solution as a simulated pollutant under sunlight irradiation. The results show that changing the absorption of CDs can affect the photocatalytic performance of TiO2. The intrinsic absorption from carbon nuclei can improve photocatalytic activity, but the long-trailing absorption from surface states is not conducive to photocatalysis. In addition, the adsorption amount of CDs can greatly affect the degradation efficiency of dyes.

关 键 词：碳点 TiO₂ 光催化 

分 类 号：O64[理学—物理化学]