Solvent‐Free Synthesis of Bismuth Oxychloride Microflower/Nanosheet Homojunctions for Photoactivity Enhancement,ChemCatChem

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Solvent‐Free Synthesis of Bismuth Oxychloride Microflower/Nanosheet Homojunctions for Photoactivity Enhancement
ChemCatChem ( IF 3.8 ) Pub Date : 2018-07-23 , DOI: 10.1002/cctc.201800357
Hanyu Yao ₁ , Haiping Li ₁ , Tingxia Hu ₂ , Wanguo Hou ₂

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Solvent‐free synthesis of bismuth‐based photocatalysts with hierarchical architectures has been rarely reported yet. Herein, BiOCl hierarchical microflowers (MFs) were prepared via a solvent‐free route for the first time, using chlorobutanol as the chlorine source. The reaction temperature (T) plays a key role for formation of MFs. The MFs were formed at T >120 °C and some MFs merged into large nanosheets (LNs). MF/LN homojunctions were constructed because considerable differences in sizes and exposed facets between the MFs and the LNs cause differences in their energy band levels. The sample prepared at 120 °C possesses the highest contents of MFs and homojunctions, specific surface area (S_BET, 13 m² g⁻¹), and photoactivity, indicating the high photoactivity of the sample arises from fabrication of homojunctions as well as the high S_BET. This work provides a solvent‐free way to simultaneously synthesize BiOCl MFs and homojunctions, which paves an avenue for solvent‐free synthesis of other photocatalysts.

中文翻译：

三氯氧化铋微花/纳米片同质结的无溶剂合成，可增强光活性

具有分层结构的基于铋的光催化剂的无溶剂合成方法尚未见报道。在此，首次使用无溶剂的方法，使用氯丁醇作为氯源，制备了BiOCl分层微花（MFs）。反应温度（T）对形成MF起着关键作用。MF在T > 120°C时形成，一些MF合并成大的纳米片（LNs）。之所以构造MF / LN同质结，是因为MF和LN之间的尺寸和裸露面有相当大的差异，导致它们的能带水平不同。在120°C下制备的样品具有最高的MF和同质结含量，比表面积（S _BET，13 m ² g ^-1）和光活性，表明样品的高光活性来自同质结的形成以及高S _BET。这项工作为同时合成BiOCl MF和同质结提供了一种无溶剂的方法，为其他光催化剂的无溶剂合成铺平了道路。

更新日期：2018-07-23

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