Enhancing electron-hole pair generation by Ti3C2 MXene-derived TiO2 integrated with g-C3N4 heterojunction for excellent photocatalytic H2 production and CO2 reduction

文献类型： 外文期刊

第一作者： Asghar, Zeeshan

作者： Asghar, Zeeshan;Bilal, Muhammad;Rehman, Zia Ur;Wang, Xiaozhi;Hou, Jianhua;Asghar, Zeeshan;Bilal, Muhammad;Rehman, Zia Ur;Habib, Haris;Butt, Faheem K.;Zheng, Kewang;Liu, Yuxue;Lin, Hui;Zhang, Yongcai

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关键词： Heterojunction; Enhancing electron-hole; Photocatalysis; Graphitic carbon nitride

期刊名称：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY （ 影响因子：8.3； 五年影响因子：7.7 ）

ISSN： 0360-3199

年卷期： 2025 年 149 卷

页码：

收录情况： SCI

摘要： Titanium carbide (Ti3C2), a member of the MXene family, is emerging as an innovative photocatalyst developed for environmental sustainability and clean energy applications. In this work, we engineer a functional heterojunction incorporating 2D g-C3N4 nanosheets with Ti3C2 (MXene) was optimized to act as a precursor for developing TiO2 nanosheets, employing a simple, economical approach to enhance photocatalytic performance. The refined g-C3N4/TiO2 photocatalyst demonstrates a favorable band gap of 2.85 eV and an effective porous structure with a pore width of 25.4 nm, significantly improving visible light absorbance. Additionally, the presence of nitrogen defects significantly inhibits charge carrier recombination. The 2D/2D layered structure enhances electron-hole pair generation, accelerates charge transfer, and improves the materials redox functionality. The multifunctional photocatalyst shows remarkable effectiveness, achieving 99.2 % degradation of RhB within 120 min, 98.7 % degradation of TC within 90 min, a CO evolution rate of 120.6 mu mol g-1 h-1 and an H2 rate of 4503 mu mol g-1 h-1. Additionally, Computational analysis demonstrates reduced recombination rates, uniform charge distribution, and an adjustable band gap, establishing the photocatalyst as an effective solution for eco-friendly energy and environmental sustainability. This research introduces a novel approach to developing efficient nanostructures for enhanced photocatalytic performance.

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