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Author NameAffiliation
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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