TiO₂/ML-Ti₃C₂复合纳米材料的制备及其光催化性能

引用本文：代丽,马娉娉,张利,孙诗睿,于伟,顾卫星,关杰.TiO₂/ML-Ti₃C₂复合纳米材料的制备及其光催化性能[J].上海第二工业大学(英文版),2021,(3):212-218

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Author Name	Affiliation
DAI Li	1a. School of Resource and Environmental Engineering
MA Ping-ping	1a. School of Resource and Environmental Engineering
ZHANG Li	1a. School of Resource and Environmental Engineering
SUN Shi-rui	2. Shanghai Solid Waste and Chemical Management Technology Center, Shanghai 200235, China
YU Wei	1b. School of Energy and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, China
GU Wei-xing	3. Shanghai Julang Environmental Protection Co., Ltd., Shanghai 201712, China
GUAN Jie	1a. School of Resource and Environmental Engineering

基金项目:国家自然科学基金青年基金 (21806101), 国家自然科学基金 (52070127), 青产学研 (2021-15) 项目资助

中文摘要:通过水热技术在二维 (2D) 多层材料 Ti₃C₂ (multi-layer Ti₃C₂, ML-Ti₃C₂) 的表面及层间原位晶化和生长锐钛矿相 TiO₂ 纳米球, 制备出 TiO₂/ML-Ti₃C₂ 复合纳米材料。采用 XRD、SEM、氮吸附等表征技术对 TiO₂/ML-Ti₃C₂ 纳米复合材料进行分析表征, 并以亚甲基蓝 (MB) 为模拟污染物, 对纯 TiO2 和 TiO2/ML-Ti₃C₂ 复合纳米材料的光催化性能进行了评价。实验结果表明, 两种材料的耦合抑制了 TiO₂ 中光生电子-空穴对的湮灭, 延长了复合光催化剂中载流子寿命, 拓宽了复合材料的光谱响应范围。在紫外光照射下, 以 TiO₂/ML-Ti₃C₂复合纳米材料为光催化剂, 200 mg/L 的 MB 溶液在 20 min 内几乎完全脱色, 降解率为 98.98%。TiO₂/ML-Ti₃C₂纳米复合材料的光催化性能优于纯 TiO₂ 和 Ti₃C₂, Ti₃C₂优异的电子传输能力和超强的吸附性能优化了 TiO₂的光催化性能。本研究为使用光催化技术处理废水提供了一种新的思路, 具有一定的实际应用前景。

中文关键词:TiO₂ ML-Ti₃₂ 光催化二维材料

Preparation of TiO₂/ML-Ti₃C₂ Composite Nanomaterials and Study on Its Photocatalytic Performance

Abstract:TiO₂/ML-Ti₃C₂ composite nanomaterials were prepared by in-situ crystallization and growth of anatase phase TiO₂ nanospheres by hydrothermal technology. TiO₂ nanospheres were formed on the surface or between layers of the two-dimensional (2D) Ti₃C₂. XRD, SEM, and N₂ adsorption-desorption techniques were used to analyze and characterize the TiO₂/ML-Ti₃C₂ nanocomposite. The photocatalytic performance of pure TiO₂ and TiO2/ML-Ti3C2 nanocomposites with methylene blue (MB) as a simulated pollutant was evaluated. Experimental results show that the coupling of the two materials inhibits the annihilation of photogenerated electron-hole pairs in TiO₂, prolongs the carrier lifetime in the composite photocatalyst, and broadens the spectral response range of the composite material. Under ultraviolet light irradiation, using TiO₂/ML-Ti₃C₂ composite nanomaterials as the photocatalyst, the MB solution of 200 mg/L was almost completely decolorized within 20 min, and the degradation rate was 98.98%. The photocatalytic performance of TiO₂/ML-Ti₃C₂ nanocomposite is better than that of pure TiO₂ and Ti₃C₂. The excellent electron transport capacity and super adsorption performance of Ti₃C₂ optimize the photocatalytic performance of TiO₂. This research provides a new idea for using photocatalytic technology to treat wastewater, which has certain practical application prospects.

keywords:TiO₂ ML-Ti₃₂ photocatalysis two-dimensional material

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