In:
Materials Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 6, No. 21 ( 2022), p. 3143-3173
Abstract:
As an emerging semiconductor-based catalyst, g-C 3 N 4 has attracted significant attention for visible light-driven photocatalytic energy conversion, synthesis of chemicals, and environmental remediation. However, pristine g-C 3 N 4 exhibits a weak response to visible light, low surface area, and rapid photogenerated carrier recombination. Thus, the introduction of structural vacancies can deeply modify the morphology and band structure of g-C 3 N 4 to overcome these issues. This work provides a critical overview and perspective on the recent development of g-C 3 N 4 photocatalysts modified by carbon (C v ) and nitrogen vacancies (N v ), or both, and their implementation in various photocatalytic applications. Initially, the methods for the identification of C v and N v in g-C 3 N 4 and their critical role in altering the morphological and structural properties of g-C 3 N 4 are presented. Then, the strategies for manipulating the microstructure and properties of g-C 3 N 4 are critically discussed, including modification with N v , C v , and functional groups or their combination, porous architecture engineering, heteroatom doping, texture and surface area mediation, and their combinations. Based on vacancy modification and other positive structural tuning aspects, the corresponding photocatalytic performance of g-C 3 N 4 is analyzed for the applications currently attracting significant research attention, including water splitting, CO 2 reduction, N 2 fixation, NO removal, pollutant degradation, selective oxidation, and H 2 O 2 production. Finally, the current challenges and future research suggestions regarding the vacancy modification of g-C 3 N 4 are presented.
Type of Medium:
Online Resource
ISSN:
2052-1537
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2867881-3
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