%0 Journal Article
%T CDs/TiO<sub>2</sub>纳米复合材料吸光度依赖的光催化活性研究<br>Absorbance-Dependent Photocatalytic Activity of CDs/TiO<sub>2</sub> Nanocomposites
%A 李昱璇
%A 张蕾
%A 孙明烨
%J Material Sciences
%P 281-289
%@ 2160-7621
%D 2025
%I Hans Publishing
%R 10.12677/ms.2025.152033
%X 本文采用水热法合成了具有不同吸光度的碳点(CDs)&#65292;研究CDs吸光度对CDs/TiO<sub>2</sub>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/TiO<sub>2</sub>纳米复合材料的结构、形貌和化学组成进行了表征&#65292;并在太阳光照射下以Rh B水溶液为模拟污染物&#65292;监测CDs/TiO<sub>2</sub>纳米复合材料对Rh B的降解情况。结果表明&#65292;改变CDs的吸收度可以影响TiO<sub>2</sub>的光催化性能&#65292;来自碳核的本征吸收有助于提升光催化活性&#65292;而来自表面态的长拖尾吸收不利于光催化。此外&#65292;CDs的吸附量可以很大程度上影响染料降解效率。<br>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/TiO<sub>2</sub> nanocomposites is studied. The structure, morphology and chemical composition of CDs/TiO<sub>2</sub> nanocomposites are characterized by transmission electron microscopy, Fourier transform infrared spectrometer and X-ray photoelectron spectrometer. The degradation of Rh B by CDs/TiO<sub>2</sub> 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 TiO<sub>2</sub>. 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.
%K 碳点&#65292
%K TiO<sub>2</sub>&#65292
%K 光催化<br>CDs
%K TiO<sub>2</sub>
%K Photocatalytic
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=107486