Preparation of g-C3N4 doped Cu/black TiO2 and its high photocatalytic reduction performance of CO2

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-06 DOI:10.1016/j.mseb.2025.118768

Wenbin Huang, Ningran Hou, Han Yang, Zhen Xu, Tianyu Bai, Fan Shao, Yasong Zhou, Qiang Wei

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Abstract

Series g-C₃N₄/Cu/B-TiO₂(x) composites with different mass ratio of g-C₃N₄ to Cu/B-TiO₂ were prepared and tested for photocatalytic reduction of CO₂. The structure–function relationship of the photocatalysts was investigated through various characterization methods and photocatalytic experiments. The results show that g-C₃N₄ can be uniformly distributed on the surface of Cu/B-TiO₂ and formed a stable heterojunction structure, which effectively reduced the band gap width of the catalyst, thus significantly improving the visible light absorption capacity of the catalyst. The modulation of the composite material properties can be realized by regulating the composite ratio of g-C3N4 and Cu/B-TiO₂. The rate and selectivity of photocatalytic reduction of CO₂ to produce CO reached the maximum when the mass ratio of g-C₃N₄ to Cu/B-TiO₂ was 3:7, and the rate of CO production was as high as 32.65 μmol∙g⁻¹∙h⁻¹, which was about 12.87 percentage points higher than that of Cu/B-TiO₂.

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g-C3N4掺杂Cu/黑色TiO2的制备及其高CO2光催化还原性能

制备了不同g-C3N4与Cu/B-TiO2质量比的g-C3N4/Cu/B-TiO2(x)系列复合材料，并对其光催化还原CO2进行了测试。通过各种表征方法和光催化实验研究了光催化剂的结构-功能关系。结果表明，g-C3N4可以均匀分布在Cu/B-TiO2表面，形成稳定的异质结结构，有效减小了催化剂的带隙宽度，从而显著提高了催化剂的可见光吸收能力。通过调节g-C3N4与Cu/B-TiO2的复合比例，可以实现对复合材料性能的调节。当g- c3n4与Cu/B-TiO2的质量比为3:7时，光催化还原CO2生成CO的速率和选择性达到最大，CO的产率高达32.65 μmol∙g−1∙h−1，比Cu/B-TiO2高出约12.87个百分点。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.