化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (6) : 137-143. DOI: 10.19817/j.cnki.issn1006-3536.2023.06.026

新材料与新技术

CNQDs/TiO₂空心球的制备及光催化性能研究

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Preparation and photocatalytic performance of CNQDs/TiO₂ hollow spheres

Xue Zhenkun¹, Wang Fei², Gao Minjie², You Fei², Liu Baoyu¹

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Received
2022-03-03
Issue Date	Revised Date
2023-07-07	2022-03-03

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摘要

传统单相TiO₂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TiO₂的光催化效率,利用简易水热法将氮化碳量子点(CNQDs)负载在TiO₂空心球(K-T)上制成CNQDs/TiO₂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TiO₂的3.0倍和3.4倍。

Abstract

Traditional single-phase TiO₂ 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 TiO₂,the carbon nitride quantum dots (CNQDs) were loaded on TiO₂ hollow spheres (K-T) by hydrothermal method to prepare CNQDs/TiO₂ 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 TiO₂ 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

Key words

photocatalysis / nitrogen carbide quantum dots / titanium dioxide hollow spheres / composites / degradation

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CNQDs/TiO₂空心球的制备及光催化性能研究[J]. 化工新型材料, 2023, 51(6): 137-143 DOI:10.19817/j.cnki.issn1006-3536.2023.06.026

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基金资助

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)

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