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Layered Heterostructures of Ultrathin Polymeric Carbon Nitride and ZnIn 2 S 4 Nanosheets for Photocatalytic CO 2 Reduction
Author(s) -
Zhou Min,
Wang Sibo,
Yang Pengju,
Luo Zhishan,
Yuan Rusheng,
Asiri Abdullah M.,
Wakeel Muhammad,
Wang Xinchen
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803250
Subject(s) - heterojunction , nanosheet , materials science , photocatalysis , carbon nitride , visible spectrum , semiconductor , chemical engineering , absorption (acoustics) , adsorption , nanotechnology , graphitic carbon nitride , nitride , composite number , fabrication , optoelectronics , catalysis , composite material , layer (electronics) , organic chemistry , chemistry , engineering , medicine , alternative medicine , pathology
The rational construction of heterostructures by using layered semiconductors with two‐dimensional (2D) nanosheet configurations is promising to improve the efficiency of CO 2 photoreduction. Herein, the fabrication of layered heterojunction photocatalysts (PCN/ZnIn 2 S 4 ) by in situ growth of 2D ZnIn 2 S 4 nanosheets on the surfaces of ultrathin polymeric carbon nitride (PCN) layers is presented for greatly enhanced CO 2 conversion with visible light. The solution‐processed self‐assembly strategy renders the building of uniform and intimate junctions between PCN layers and ZnIn 2 S 4 subunits, which remarkably accelerates the separation and transfer of photogenerated charge carriers. In addition, the layered composites can also promote CO 2 adsorption and strengthen the visible‐light absorption. Consequently, the optimized PCN/ZnIn 2 S 4 sheet‐shaped composite shows reinforced photoactivity for deoxygenative CO 2 conversion, affording a high CO‐production rate of 44.6 μmol h −1 , which is 223 times higher than that of the pristine PCN nanosheets. Moreover, the heterojunction photocatalyst also exhibits high stability during repeated runs for five cycles.