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通过构建坚固的多元TiMOF/COF复合材料提高光催化制氢
作者:小柯机器人 发布时间:2021/11/17 14:55:48

美国北德克萨斯大学Shengqian Ma团队通过构建坚固的多元TiMOF/COF复合材料提高光催化制氢。相关研究成果于2021年11月15日发表在国际顶尖学术期刊《德国应用化学》。

钛金属有机框架(Ti-MOFs)作为一种极具吸引力的人工光催化剂,由于其与TiO2相似的光氧化还原活性以及作为天线吸收可见光的良好光学响应性,在太阳能转换领域显示出巨大的潜力。尽管人们一直致力于开发具有高光催化活性的Ti-MOFs,但其太阳能转换性能仍然很差。

该文中,研究人员采用共价集成策略来构建一系列多元Ti-MOF/COF杂化材料PdTCPPPCN-415(NH2)/TpPa(复合材料1、2和3),其具有优异的可见光利用率、合适的带隙和用于光催化制H2的高比表面积。值得注意的是,所制备的复合材料表现出显著增强的可见光驱动的光催化H2析出性能,尤其是对于最大H2析出率为13.98 mmol g-1 H-1(转换频率(TOF)=227 H-1)的复合材料2,其远远高于原型对应物PdTCPPPCN-415(NH2)(0.21 mmol g-1 h-1)和TpPa(6.51 mmol g-1 h-1)。

研究工作为开发用于光催化析氢反应及其他反应的高效光催化剂提供了一条新途径。

附:英文原文

Title: Enhancing Photocatalytic Hydrogen Production via the Construction of Robust Multivariate Ti-MOF/COF Composite

Author: Cheng-Xia Chen, Yang-Yang Xiong, Xin Zhong, Pui Ching Lan, Zhang-Wen Wei, Hongjun Pan, Pei-Yang Su, Yujie Song, Yi-Fan Chen, Ayman Nafady, Siraj Uddin, Shengqian Ma

Issue&Volume: 2021-11-15

Abstract: Titanium metal-organic frameworks (Ti-MOFs), as an appealing type of artificial photocatalysts, have shown great potentials in the field of solar energy conversion due to their well-studied photo-redox activity similar to TiO  2  and good optical responsiveness of linkers serving as the antenna to absorb visible-light. Although enormous efforts have been dedicated to developing Ti-MOFs with high photocatalytic activity, their solar energy conversion performances are still poor. Herein, a covalent-integrated strategy has been implemented to construct a series of multivariate Ti-MOF/COF hybrid materials, PdTCPPPCN-415(NH  2  )/TpPa (composites 1, 2, and 3), featuring excellent visible-light utilization, suitable band gap, and high surface area for photocatalytic H  2  production. Notably, the resulting composites demonstrated remarkably enhanced visible-light-driven photocatalytic H  2  evolution performance, especially for the composite 2 with the maximum H  2  evolution rate of 13.98 mmol g  -1  h  -1  (turn-over frequency (TOF) = 227 h  -1  ), which is much higher than the prototypical counterparts, PdTCPPPCN-415(NH  2  ) (0.21 mmol g  -1  h  -1  ) and TpPa (6.51 mmol g  -1  h  -1  ). Our work thereby suggests a new approach to develop highly efficient photocatalysts for photocatalytic H  2  evolution reaction and beyond.

DOI: 10.1002/anie.202114071

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202114071

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx