文献类型：期刊文献

英文题名：Chemisorption-Induced and Plasmon-Promoted Photofixation of Nitrogen on Gold-Loaded Carbon Nitride Nanosheets

作者：Wu, Shiqun[1,2];Chen, Ziyu[1,2];Liu, Kaida[1,2];Yue, Wenhui[1,2];Wang, Lingzhi[1,2];Zhang, Jinlong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：13

期号：13

起止页码：3455

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20202008654583);WOS:【SCI-EXPANDED(收录号:WOS:000531555200001)】；

基金：This work was supported by the National Natural Science Foundation of China (21673073, 21677048 and 5171101651), the Science and Technology Commission of Shanghai Municipality (18520710200, 16JC1401400, 17520711500), Shanghai Pujiang Program (18PJD012), the PetroChina Innovation Foundation (2015D-5006-0402) and the Fundamental Research Funds for the Central Universities (222201717003, 22221818014).

语种：英文

外文关键词：carbon nitride; gold; nitrogen fixation; photocatalysis; surface plasmon resonance

摘要：Photocatalytic fixation of nitrogen is a promising method for green conversion of solar light, but has been substantially limited by inefficient activation of the nonpolar N equivalent to N bond and the poor utilization of visible light. In this study, carbon nitride nanosheet composites with abundant nitrogen vacancies and strong plasmonic resonance absorption of visible light have been fabricated through the combination of hydrogen treatment and loading of Au nanoparticles. Ammonia yields of 184 mu mol g(-1) and 93 mu mol g(-1) are obtained without any sacrificial agent under full-light and visible-light irradiation, respectively. In particular, the visible-light activity is enhanced tenfold with the help of Au. Combining the experimental results and theoretical calculations, both the hydrogen treatment and Au loading help form nitrogen vacancies on the carbon nitride nanosheets, which promote N-2 activation by enhancing the chemisorption. Furthermore, the Au loading further improves the nitrogen reduction efficiency through charging the excited hot electrons formed from the surface plasmonic resonance to the adsorbed N-2 molecules.