Enhancement of Carrier Migration by Monolayer MXene Structure in Ti3CN/TiO2 Heterojunction to Achieve Efficient Photothermal Synergistic Transformation of CO2

IF 3.8 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysts Pub Date : 2024-01-02 DOI:10.3390/catal14010035

Chenxuan Zhu, M. Guo, Ziqi Wang, Jiang He, Jiaqi Qiu, Yuxuan Guo, Yunfei Yan, Jingyu Ran, Zhongqing Yang

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引用次数: 0

Abstract

Carbon nitride MXene exhibits good metal conductivity, high photothermal conversion, carrier mobility, and high exposure of active sites, which makes it a promising co-catalyst for photothermal synergistic transformation of CO2. In this paper, Ti3CN/TiO2 heterojunction was constructed in situ using Ti3CN as TiO2 precursor to investigate the performance of Ti3CN MXene in photothermal synergistic transformation of CO2, and then the monolayer structure was utilized to enhance the interfacial charge transfer and improve the photothermal catalytic activity of Ti3CN. The catalysts were characterized by SEM, XRD, XPS, and UV-Vis DRS, and it was found the heterojunction constructed by monolayer MXene had a narrower bandgap and a higher carrier generation mobility, which, combined with the catalytic activity test, proved the single monolayer Ti3CN MXene had better photothermal synergistic conversion efficiency of CO2, and the heterojunction yield was 11.36 μmol·g−1·h−1 after layering, compared with that before layering (9.41%), which was 1.2 times higher than that before layering (9.41 μmol·g−1·h−1).

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利用 Ti3CN/TiO2 异质结中的单层 MXene 结构增强载流子迁移，实现二氧化碳的高效光热协同转化

氮化碳 MXene 具有良好的金属导电性、高光热转化率、载流子迁移率和高活性位点暴露率，是一种很有前景的 CO2 光热协同转化助催化剂。本文以 Ti3CN 为 TiO2 前驱体，原位构建了 Ti3CN/TiO2 异质结，研究了 Ti3CN MXene 在 CO2 光热协同转化中的性能，并利用单层结构增强了界面电荷转移，提高了 Ti3CN 的光热催化活性。通过对催化剂的 SEM、XRD、XPS 和 UV-Vis DRS 表征，发现单层 MXene 构建的异质结具有更窄的带隙和更高的载流子生成迁移率，结合催化活性测试，证明单层 Ti3CN MXene 具有更好的 CO2 光热协同转化效率，异质结产率为 11.36 μmol-g-1-h-1，与分层前（9.41%）相比，分层后的异质结产率是分层前（9.41 μmol-g-1-h-1）的 1.2 倍。

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来源期刊

Catalysts CHEMISTRY, PHYSICAL-

CiteScore

6.80

自引率

7.70%

发文量

1330

审稿时长

3 months

期刊介绍： Catalysts (ISSN 2073-4344) is an international open access journal of catalysts and catalyzed reactions. Catalysts publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.