Polytriazine@CdS纳米片作为无光敏剂催化剂用于高效光催化还原CO2

Jian Chen , Yixin Huang , Liu Wan, Cheng Du, Yan Zhang, Mingjiang Xie
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引用次数: 0

摘要

开发具有合适的带隙结构、令人印象深刻的光学响应和持久可重复使用的基于cd的光催化剂是至关重要的,也是具有挑战性的。由聚三嗪和CdS组成的多相催化剂表现出优异的光生电荷分离和转移能力,以及优异的CO2吸附能力。在这项研究中,我们已经表明,通过用聚三嗪聚合物涂层对CdS纳米片进行表面改性,可以显著提高CO2光辅助还原效率。利用XRD、TEM、SEM、N2吸附-解吸、CO2吸附、DRS、XPS、光电性能测试等技术对PP@CdS光催化剂进行了全面表征。通过在25℃水溶液中可见光照射下光辅助CO2还原反应,评价PP@CdS的催化性能。由于具有较强的CO2吸附能力和对光生电子的高效分离和利用,PP@CdS光催化剂的CO产率(6.7 μmol/g/h)和CH4产率(4.2 μmol/g/h)分别是裸CdS纳米片的1.3倍和1.3倍。此外,PP@CdS光催化剂在CO2还原反应中表现出出色的可重复使用性。本研究提出了一种提高CO2吸附能力和调节聚合物包覆半导体材料带隙结构的新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Polytriazine@CdS nanosheets as photosensitizer free catalyst for efficient photocatalytic reduction of CO2
The development of CdS-based photocatalysts with the appropriate bandgap structure, impressive optical response, and long-lasting reusability is both crucial and challenging. The heterogeneous catalyst, made up of polytriazine and CdS, demonstrates exceptional photogenerated charge separation and transfer capabilities, as well as superior CO2 adsorption abilities. In this study, we have shown that the CO2 photoassisted reduction efficiency of CdS nanosheets can be significantly improved through surface modification with a polytriazine polymer coating. The PP@CdS photocatalyst has been thoroughly characterized using techniques such as XRD, TEM, SEM, N2 adsorption-desorption, CO2 adsorption, DRS, XPS, and photoelectric performance tests. The catalytic performance of the PP@CdS was assessed through photoassisted CO2 reduction reactions under visible light irradiation in an aqueous medium at 25 ℃. Owing to its enhanced CO2 adsorption capacity and the efficient separation and utilization of photogenerated electrons, the PP@CdS photocatalyst demonstrated a CO yield (6.7 μmol/g/h) 1.3 times greater and a CH4 yield (4.2 μmol/g/h) 1.3 times higher than that of bare CdS nanosheets. Furthermore, the PP@CdS photocatalyst demonstrated outstanding reusability in CO2 reduction reactions. This study presents a novel approach to enhancing the CO2 adsorption capacity and modulating the bandgap structure of polymer-coated semiconductor materials.
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