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Title: Polymeric carbon nitride with internal n-p homojunctions for efficient photocatalytic CO₂ reduction coupled with cyclohexene oxidation
Authors: Zhen, Wenlong
Sun, Jiajun
Ning, Xiaofeng
Shi, Xiangyan
Xue, Can
Keywords: Engineering::Materials
Issue Date: 2021
Source: Zhen, W., Sun, J., Ning, X., Shi, X. & Xue, C. (2021). Polymeric carbon nitride with internal n-p homojunctions for efficient photocatalytic CO₂ reduction coupled with cyclohexene oxidation. Applied Catalysis B: Environmental, 298, 120568-.
Project: MOE2018-T2-1-017
MOE2019-T1- 002-012
Journal: Applied Catalysis B: Environmental
Abstract: We present the creation of internal n-p homojunctions in polymeric carbon nitride (PCN) by inserting phenyl groups, which bridge the adjacent tri-s-triazine moieties, into the PCN matrix through copolymerization methods. The linkage by the benzene rings results in a large π-conjugated structure and controllable electron-localization, allowing for modulating the electronic structure, optical properties, and lipophilicity of the prepared sample (CDT-DCDA-490). The electrochemical studies reveal the co-existence of both n-type and p-type domains in the polymeric skeleton of CDT-DCDA-490. The created internal n-p homojunctions can accelerate the separation and transfer kinetics of photogenerated charge carriers in the PCN matrix. As a result, the functionalized PCN photocatalyst showed excellent activities in the photocatalytic CO2 reduction and simultaneous olefin oxidation in the water-oil biphasic system, giving high selectivity for the production of CO and 2-cyclohexen-1-one. In addition, the CDT-DCDA-490 semiconductor also displays excellent PEC performance as photoanode. This work provides valuable guidance for future design and development of novel functional PCN-based photocatalysts with internal junctions for efficient solar fuels production.
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2021.120568
Rights: © 2021 Elsevier B.V. All rights reserved. This paper was published in Applied Catalysis B: Environmental and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20231212
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles
SPMS Journal Articles

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