A surface-alkalinized Ti3C2 MXene as an efficient cocatalyst for enhanced photocatalytic CO2 reduction over ZnO

Li Junyue; Wang Ziyi; Chen HuayuZhang QiqiHu HuilinLiu LequanYe JinhuaWang Defa

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A surface-alkalinized Ti3C2 MXene as an efficient cocatalyst for enhanced photocatalytic CO2 reduction over ZnO

机译：一个surface-alkalinized Ti3C2 MXene作为高效助催化剂对提高光催化二氧化碳减少在氧化锌

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Photocatalytic reduction of carbon dioxide (CO2) into hydrocarbon fuels has attracted increasing research attention in recent years. However, the fast recombination of photoinduced charge carriers and poor adsorption/activation capability of CO2 molecules limit the photoconversion efficiency. Herein, we report on loading a two-dimensional (2D) titanium carbide (Ti3C2) MXene as a noble-metal-free cocatalyst onto zinc oxide (ZnO) via a facile electrostatic self-assembly method for efficient CO2 photoreduction. It is interesting to find that the ZnO loaded with 7.5 wt% of surface-alkalinized Ti3C2 exhibited remarkably improved evolution rates of CO (30.30 mu mol g(-1) h(-1)) and CH4 (20.33 mu mol g(-1) h(-1)), which were approximately 7-fold and 35-fold those of bare ZnO, respectively. The surface-alkalinized Ti3C2 MXene is believed to play a crucial role in improving the separation/transfer of photoinduced charge carriers and the adsorption/activation of CO2 molecules, accounting for the superior photocatalytic activity of CO2 reduction. Our work demonstrates that the Ti3C2 MXene could be employed as a noble-metal-free cocatalyst for efficient photocatalytic CO2 reduction.

机译：光催化还原二氧化碳(CO2)为碳氢化合物燃料吸引了越来越多近年来的研究关注。光诱导电荷的快速重组运营商和可怜的吸附/激活二氧化碳分子的能力限制photoconversion效率。加载一个二维(2 d)碳化钛(Ti3C2) MXene noble-metal-free助催化剂在氧化锌(氧化锌)通过一个简单的静电自组装的方法高效的二氧化碳光致还原作用。的氧化锌7.5 wt %的加载surface-alkalinized Ti3C2表现出显著改进的进化率有限公司(30.30亩摩尔g (1) h(1))和甲烷(20.33μ摩尔g (1) h (1)),大概是7倍和35-fold那些吗分别为裸露的氧化锌。surface-alkalinized Ti3C2 MXene据信在改进中起到至关重要的作用分离/光诱导电荷转移运营商和二氧化碳的吸附/激活分子,占上二氧化碳的光催化活性的降低。工作表明Ti3C2 MXene使用作为一个noble-metal-free助催化剂高效光催化二氧化碳的减少。

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《Catalysis science & technology》 |2021年第14期|4953-4961|共9页
作者
Li Junyue; Wang Ziyi; Chen HuayuZhang QiqiHu HuilinLiu LequanYe JinhuaWang Defa;
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Tianjin Univ, TJU NIMS Int Collaborat Lab, Key Lab Adv Ceram & Machining Technol,Sch Sci & E, Minist Educ,Tianjin Key Lab Composite & Funct Mat, Tianjin 30072, Peoples R China;

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中图分类汉语教学;
关键词
assembly method; reduction; Carbon Dioxidezinc oxideshydrocarbon fuelsCharge carriers;

机译：组装方法;减少;碳Dioxidezincoxideshydrocarbon fuelsCharge运营商;

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A surface-alkalinized Ti3C2 MXene as an efficient cocatalyst for enhanced photocatalytic CO2 reduction over ZnO

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