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在TiO₂@Ti₂O₃中构建内置电场的核心外异质连接,以实现优化光催化性能

Tingting Hu^1,2, Panpan Feng³, Liping Guo²

¹State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

Nanomaterials (Basel, Switzerland)

|July 29, 2023

概括

新的Ti2O3@TiO2核心外复合材料显著增强了四环素 (TC) 的光催化降解. 这一进步是由于内部电场改善了电荷载体的分离,将效率从28%提高到70.1%.

科学领域:

材料科学材料科学材料科学
光催化作用的光催化
环境化学环境化学

背景情况:

二氧化物 (Ti2O3) 和二氧化 (TiO2) 是广泛研究的光催化剂.
改善电荷载体分离对于提高复合材料的光催化效率至关重要.
核心外异质连接为开发先进光催化剂提供了一个有前途的战略.

研究的目的:

为了合成Ti2O3@TiO2核心外异质连接复合材料,具有变化的内部电场.
评估这些复合材料对四环素 (TC) 降解的光催化性能.
阐明内部电场与光催化效率之间的关系.

主要方法:

通过简单的热处理合成Ti2O3@TiO2核心外复合材料.
使用SEM,XRD,PL,UV-Vis,BET,SPV和TEM进行表征.
使用四环素 (TC) 作为目标污染物的光催化降解实验.

主要成果:

与Ti2O3单独相比,合成的Ti2O3@TiO2复合材料显著提高了光催化性能.
通过优化材料,TC的光催化降解率从28%增加到70.1%.
描述证实了Ti2O3和TiO2之间形成的内部电场,从而促进了有效的电荷载体分离.

结论:

增强的光催化活性归因于内置的电场,促进光生成的电荷载体分离.
减少电子和孔的重组导致催化剂表面的电荷可用性增加,提高了降解效率.
将Ti2O3与TiO2合在一起形成内部电场,为提升Ti2O3光催化性能提供了一个通用策略.

关键词:

Ti2O3@TiO2 核心外异质连接的异质连接内置的电场内置的电场光催化作用的光催化作用

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