Hexagonal-borocarbonitride (h-BCN) based heterostructure photocatalyst for energy and environmental applications: A review

光催化 异质结 六方晶系 材料科学 纳米技术 化学工程 环境科学 环境化学 工程物理 光电子学 化学 催化作用 工程类 结晶学 有机化学
作者
Heena Garg,Shilpa Patial,Pankaj Raizada,Van‐Huy Nguyen,Soo Young Kim,Quyet Van Le,Tansir Ahamad,Saad M. Alshehri,Chaudhery Mustansar Hussain,Thi Thanh Huyen Nguyen,Pardeep Singh
出处
期刊:Chemosphere [Elsevier]
卷期号:313: 137610-137610 被引量:12
标识
DOI:10.1016/j.chemosphere.2022.137610
摘要

Formulation of heterojunction with remarkable high efficiency by utilizing solar light is promising to synchronously overcome energy and environmental crises. In this concern, hexagonal-borocarbonitride (h-BCN) based Z-schemes have proved potential candidates due to their spatially separated oxidation and reduction sites, robust light-harvesting ability, high charge pair migration and separation, and strong redox ability. H-BCN has emerged as a hotspot in the research field as a metal-free photocatalyst with a tunable bandgap range of 0-5.5 eV. The BCN photocatalyst displayed synergistic benefits of both graphene and boron nitride. Herein, the review demonstrates the current state-of-the-art in the Z-scheme photocatalytic application with a special emphasis on the predominant features of their photoactivity. Initially, fundamental aspects and various synthesis techniques are discussed, including thermal polymerization, template-assisted, and template-free methods. Afterward, the reaction mechanism of direct Z-scheme photocatalysts and indirect Z-scheme (all-solid-state) are highlighted. Moreover, the emerging Step-scheme (S-scheme) systems are briefly deliberated to understand the charge transfer pathway mechanism with an induced internal electric field. This review critically aims to comprehensively summarize the photo-redox applications of various h-BCN-based heterojunction photocatalysts including CO2 photoreduction, H2 evolution, and pollutants degradation. Finally, some challenges and future direction of h-BCN-based Z-scheme photocatalyst in environmental remediation are also proposed.
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