Electrostatic Self-Assembly of Upconversion-Functionalized Z-Scheme Heterojunction Photocatalyst and its Environmental Applications

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2025-05-30 DOI:10.1007/s13391-025-00580-w

Xinyuan Chen, Weiyang Chen, Jingjing Xu, Mindong Chen

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引用次数: 0

Abstract

The N-deficient g-C₃N₄/Bi₃TaO₇ composite photocatalyst with upconversion capability was synthesized via electrostatic self-assembly. Under visible light, it achieved 80.7% LVFX degradation efficiency, maintaining 65% performance under long-wavelength illumination. PL characterization demonstrated strong upconversion property, with the sample emitting blue light at 470 nm under 800 nm near-infrared excitation. Electrochemical analysis revealed the material’s band structure and confirmed the formation of a Z-scheme heterojunction. Based on these findings, we propose a degradation mechanism: Nitrogen defect levels act as intermediate states for electron transitions, enabling electrons to reach higher energy levels. This process generates high-energy photons that subsequently activate BTO for photocatalytic reactions.

Graphical Abstract

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上转换功能化z型异质结光催化剂的静电自组装及其环境应用

采用静电自组装的方法合成了具有上转化能力的缺氮g-C3N4/Bi3TaO7复合光催化剂。在可见光下，LVFX降解效率达到80.7%，在长波照明下保持65%的性能。PL表征显示出很强的上转换特性，样品在800 nm近红外激发下发出470 nm的蓝光。电化学分析揭示了材料的能带结构，并证实了z型异质结的形成。基于这些发现，我们提出了一种降解机制：氮缺陷水平作为电子跃迁的中间态，使电子达到更高的能级。这个过程产生高能光子，随后激活BTO进行光催化反应。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.