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Bismuth Oxyhalide Nanomaterials: Layered Structures Meet Photocatalysis
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最近，华中师范大学张礼知教授在nanoscale上撰写了一篇名为”Bismuth Oxyhalide Nanomaterials: Layered Structures Meet Photocatalysis“的光催化综述文章。该文章总结了层状卤氧化铋纳米材料的合成策略及其生长机理，提出了调控其层状结构的设计准则。作者重点阐述了卤氧化铋层状结构依赖的性质，例如pH相关的晶面暴露和晶相转换、晶面依赖的光催化活性和分子氧活化途径，进而指出了卤氧化铋层状依赖的光活性的实质原因。再者，作者概括了通过调控卤氧化铋层状结构来增强其光催化活性的一些策略，比如内电场调控、脱卤效应、表面功能化、掺杂、等离子修饰以及构筑异质结，为未来高效卤氧化铋基光催化材料的设计提供了有效的帮助。在文章的最后，作者指出了在调控卤氧化铋层状结构依赖的性质方面所存在的一些关键性的科学问题，进而为增强卤氧化铋光催化活性的后续研究提出了一些有益的意见。该文章全文16页，参考文献208篇。 In recent years layered bismuth oxyhalide nanomaterials have received more and more concerns as promising photocatalysts because their unique layered structures endow them with fascinating physicochemical properties and thus great potential photocatalytic applications for environment remediation and energy harvesting. In this article we explore the synthesis strategies and growth mechanisms of layered bismuth oxyhalide nanomaterials and then propose design principles of tailoring layered configuration to control nanoarchitectures for high efficient photocatalysis. Subsequently, we focus on their layered structure dependent properties including pH related crystal facet exposure and phase transformation, and facet-dependent photoactivity and molecular oxygen activation pathways, so as to clarify the origin of layered structure dependent photoreactivity. Furthermore, we summarize various strategies of modulating the composition and arrangement of layered structures to enhance the photoactivity of nanostructured bismuth oxyhalides via internal electric field tuning, dehalogenation effect, surface functionalization, doping, plasmon modification, and heterojunction construction, which may offer efficient guidance for the design and construction of high-performance bismuth oxyhalide-based photocatalysis systems. Finally, we highlight some crucial issues in engineering the layered-structure mediated properties of bismuth oxyhalide photocatalysts and give tentative suggestions for future research on increasing their photocatalytic performance. 1. Introduction 2. Synthesis of Layered Bismuth Oxyhalides Nanomaterials 2.1 Synthesis Strategies of Nanostructured Bismuth Oxyhalides 2.2 Growth Mechanisms and Design Principles of Layered Configuration Mediated Nanoarchitectures for Bismuth Oxyhalides 3. Layered Structure Dependent Properties 3.1 Layered Structure Dependent Electronic Structures 3.2 Layered Structure Dependent Phase Transformation and Facet Exposure 3.3 Layered Structure Dependent Oxygen Activation 4. Layered Structure Tuning for Photoactivity Enhancement 4.1 Internal Electric Field Tuning 4.2 Dehalogenation Effect 4.3 Surface Functionalization 4.4 Doping 4.5 The Construction of Plasmonic Photocatalysis System 4.6 The Heterojunction Construction 5. Conclusion Remarks and Perspectives  图片2.png |
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2014-09-09 15:16:57, 1.93 M
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