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首页> 外文期刊>Journal of photochemistry and photobiology, C. Photochemistry reviews >Searching for facet-dependent photoactivity of shape-controlled anatase TiO2
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Searching for facet-dependent photoactivity of shape-controlled anatase TiO2

机译：搜索形状控制的锐钛矿型TiO2的面依赖性光活性

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Improving the performance of mostly employed anatase TiO2 photocatalysts by properly controlling their crystal shape represents a big challenge to improve their efficiency in photocatalytic applications. After the synthesis, reported in 2008, of anatase microcrystals enriched in high-energy {001} facets, many efforts have been made aimed at tuning the crystal morphology of anatase, by means of either fluorine-mediated or more environmentally friendly methods, producing a deviation from its regular crystal growth. In this relatively new field of investigation, controversial opinions emerged concerning the role of each type of facet and its relative amount in relation to photoefficiency optimization. This review addresses this topic by presenting a critical survey of selected literature reports. After a brief introduction on the main synthetic strategies adopted to obtain shape-controlled anatase photocatalysts, the attention is focused on the methods employed for their comprehensive characterization, including the identification and quantification of exposed facets and the assessment of their influence on bulk and surface properties relevant to photoactivity. Potential interferences, derived from synthetic routes and possibly affecting the conclusions of facet-dependent photoactivity investigations, are also discussed. Key examples of test reactions actually demonstrating how both the type and/or the amount of specific facets influence photocatalytic activity are finally reported, aiming at providing rational bases for the design of better performing shape-controlled anatase photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.
机译：通过适当地控制其锐钛矿晶形来改善大多数使用的锐钛矿型TiO2光催化剂的性能是提高光催化应用效率的巨大挑战。在2008年报道合成富含高能{001}晶面的锐钛矿微晶之后，人们进行了许多努力，目的是通过氟介导或更环保的方法来调节锐钛矿的晶体形态，偏离其规则的晶体生长。在这个相对较新的研究领域中，关于每种类型的构面的作用及其与光效率优化相关的相对数量，出现了有争议的观点。这篇评论通过对选定的文献报告进行重要的调查来解决这个问题。在简要介绍了用于获得形状控制的锐钛矿型光催化剂的主要合成策略后，我们将注意力集中在对其进行全面表征的方法上，包括鉴定和量化裸露面以及评估其对体积和表面性质的影响。与光活性有关。还讨论了源自合成途径的潜在干扰，并可能影响刻面依赖性光活性研究的结论。最后报告了测试反应的关键示例，这些示例实际上证明了特定小平面的类型和/或数量如何影响光催化活性，旨在为设计更好的形状控制的锐钛矿型光催化剂提供合理的依据。 （C）2016 Elsevier B.V.保留所有权利。

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