数字农科院2.0

Oxidation of 5-Hydroxymethylfurfural over ZnIn2S4/Ti3C2Tx Photocatalyst Modulated by Sulfur Vacancy Defects and Schottky Heterojunctions

文献类型： 外文期刊

作者： Xiaoping Wang; Bowen Yang; Haoye Wang; Haixin Guo; Richard Lee Smith Jr; Yaqiong Su; Xinhua Qi

关键词： Photocatalyst

期刊名称： ChemSusChem

ISSN： 1864-5631

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Conversion of biomass into chemical products with solar energy is an important avenue for technological sustainability. Constructing efficient Schottky heterojunctions with vacancy defects can be a productive approach for achieving photooxidation of 5-hydroxymethylfurfural (HMF). Herein, sulfur vacancy (Vs) defect-enriched ZnIn2S4 is combined with Ti3C2Tx MXene (Vs-ZIS/MX) containing Schottky heterojunctions via self-assembly to form photocatalysts for efficient oxidation of HMF to 2,5-diformylfuran (DFF) under air-ambient conditions. HMF conversion of 87.3% with 72.9% DFF selectivity is obtained by the Vs-ZIS/MX heterojunction photocatalyst under visible light (420 nm < λ <780 nm, 2 h). Density functional theory calculations reveal that the Schottky heterojunction and regulated S vacancies enhance the electronic coupling and lower HMF adsorption energy, establishing a directional electron transfer channel from Vs-ZIS to MXene and an enhanced built-in electric field. Extended X-ray absorption fine structure spectroscopy shows that a stable metal (Zn)O bond coordination is formed between Vs-ZIS and MXene, and the enrichment of local electrons at S vacancy defects sites and metal–O coordination makes it possible to extract the delocalized electrons from ZIS to MXene. This work demonstrates a method to modulate the electron cloud density and enhance transport with a built-in electric field on photogenerated carriers for catalytic conversion of organic alcohols.

分类号：

  • 相关文献
作者其他论文 更多>>