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首页> 外文期刊>ACS applied materials & interfaces >Tuning Activities of K_(1.9)Na_(0.1)Ta2O6·2H2O Nanocrystals in Photocatalysis by Controlling Exposed Facets
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Tuning Activities of K_(1.9)Na_(0.1)Ta2O6·2H2O Nanocrystals in Photocatalysis by Controlling Exposed Facets

机译：通过控制裸露面来调节K_（1.9）Na_（0.1）Ta2O6·2H2O纳米晶体在光催化中的活性

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摘要

Morphology-controlled synthesis of tantalates is a major challenge in the field of material science. Herein, an innovative strategy has been developed for controllably synthesizing K_(1.9)Na_(0.1)Ta2O6·2H2O (KNTO) nanocrystals shaped as octahedra and nanosheets without using any capping agents. The obtained nanocrystals show high activity in photocatalytic H2 evolution from CH3OH/H2O solution, and their performance closely depends on the exposed facets, in which the {111}-facet-bounded nanooctahedra exhibit more than 3 times higher activity than the nanosheets dominated with {101} facets. The influence of surface atomic structure and electronic band structure on the photocatalytic properties of the KNTO nanocrystals is systematically studied. This is the first report for the facet controllable synthesis of tantalate materials with highly regular shapes. The present approach is anticipated as a general strategy for controllable synthesis of tantalate materials and also provides feasibility for rational design and activity optimization of shape-controlled photocatalysts for H2 production.
机译：形态控制的钽酸盐的合成是材料科学领域的主要挑战。在本文中，已经开发了一种创新策略，可控制地合成形状为八面体的K_（1.9）Na_（0.1）Ta2O6·2H2O（KNTO）纳米晶体和纳米片，而无需使用任何封端剂。所获得的纳米晶体在从CH3OH / H2O溶液中光催化分解H2中显示出高活性，其性能密切取决于暴露的小平面，其中{111}-小面结合的纳米八面体的活性比以{ 101}个方面。系统研究了表面原子结构和电子能带结构对KNTO纳米晶体光催化性能的影响。这是具有高度规则形状的钽酸盐材料的面可控合成的第一份报告。预期本方法是可控制合成钽酸酯材料的一般策略，并且还为用于氢气生产的形状控制的光催化剂的合理设计和活性优化提供了可行性。

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