化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (8) : 79-84.

新材料与新技术

石墨烯量子点修饰TiO₂复合纳米材料的制备及其光电性能研究

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Preparation and photoelectric property of TiO₂ composite nanoparticles modified by graphene quantum dots

Chen Ping¹, Liu Ting², Yao Kaibo², Yuan Guoqiu¹, Shi Lei², Ge Cunwang²

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Received
2017-05-30
Issue Date	Revised Date
2018-09-18	2017-05-30

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摘要

传统的二氧化钛(TiO₂)存在一些问题,如能隙值过大只可响应紫外波段,光生电子与空穴极易在体内和表面复合。针对目前TiO₂在光催化应用中存在的不足,提出了有效提升其光催化性能的实验方案。以高比率(001)面纳米TiO₂粒子为研究对象,采用热裂解柠檬酸制备的石墨烯量子点(GQDs),在强碱水热条件下制备出GQDs修饰的海胆状TiO₂。对所制样品的形貌与结构进行表征,并利用构建好的电化学平台,分析改性修饰对TiO₂光催化性能的影响。结果表明,GQDs敏化的TiO₂显示出优异的光催化性能。

Abstract

Conventional titanium dioxide(TiO₂) has some problems,such as high energy gap value of which only responded to ultraviolet band,and recombination of photo-generated electrons and holes both inside and on the surface.According to the research shortcoming in photocatalytic application of TiO₂,a series of experimental protocols to improve the photocatalytic efficiency were mainly focused.The truncated octahedral TiO₂ with high ratio (001) active facet was the study object.TiO₂ stripped in alkali environment was modified by graphene quantum dots (GQDs) prepared in optimum process.The GQDs was fabricated by citric acid pyrolysis method.Then,the morphology and structure were characterized.The photocatalytic activities were characterized through electrochemical test platform to analyze the effect of GQDs in promoting the photocatalytic activity of traditional anatase TiO₂.The results showed that TiO₂ sensitized by GQDs performed excellent photocatalytic activity.

关键词

二氧化钛 / 石墨烯量子点 / 光催化活性

Key words

titanium dioxide / grapheme quantum dots / photoelectric property

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石墨烯量子点修饰TiO₂复合纳米材料的制备及其光电性能研究[J]. 化工新型材料, 2018, 46(8): 79-84 DOI:

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