Homojunction type of carbon nitride as a robust photo-catalyst for reduction conversion of CO2 in water vapor under visible light
Homojunction type of carbon nitride as a robust photo-catalyst for reduction conversion of CO2 in water vapor under visible light
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DOI：
10.1016/j.cej.2021.132668
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发表时间：
2022
影响因子：
15.1
通讯作者：
Haijiao Xie
中科院分区：
文献类型：
--
作者：
Yi Yang;Yuanyuan Chen;Zhenhui Li;Senpei Tang;Youji Li;Zaihui Fu;Shitao Yang;Ming Yang;Haijiao Xie
The value-added conversion of CO2 by photocatalytic reduction is considered as a potential way to solve the current energy and environmental crisis. In this paper, we report that a mechanical mixture of the as-thermally polymerized melamine (Me)- and 3-amino-1,2,4-triazole (AT)-based nitride carbons (MCN and TCN) can turn into a homojunction material (MTCN) by a calcination under air. A series of characterizations and photo-catalytic tests, combined with DFT calculations, support that the constructed MTCN has an improved porosity and photoelectric conversion efficiency. And the nitrogen-rich structure not only broadens the visible light response range but also provides stronger Lewis basic sites for the adsorption and activation of CO2 at the surface. As a result, MTCN exhibits the most outstanding performance on tetracycline degradation under visible light illumination. In particular, its photo-catalytic efficiency for the visible-triggered CO2 reduction under normal temperature and pressure can reach 7.75 μmol·g−1·h−1, which is 13.8 or 16.1 times higher than the single MCN or TCN. This work provides a facile pathway to construct CN-based homojunction photocatalyst for the efficient conversion of CO2 into valuable products.
