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Enhancement of Solar-Driven Photocatalytic Activity of BiOI Nanosheets through Predominant Exposed High Energy Facets and Vacancy Engineering.
Small ( IF 13.0 ) Pub Date : 2020-01-14 , DOI: 10.1002/smll.201904783 Jinwu Bai 1 , Jingyu Sun 1 , Xiaohe Zhu 1 , Jiandang Liu 2 , Haijun Zhang 1, 3 , Xue-Bo Yin 1 , Lu Liu 1
Small ( IF 13.0 ) Pub Date : 2020-01-14 , DOI: 10.1002/smll.201904783 Jinwu Bai 1 , Jingyu Sun 1 , Xiaohe Zhu 1 , Jiandang Liu 2 , Haijun Zhang 1, 3 , Xue-Bo Yin 1 , Lu Liu 1
Affiliation
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The increasing application of exposed high energy facet is an effective strategy to improve the photocatalytic performance of photocatalysts because the vacancies are beneficial to photocatalytic reaction. Vacancy dominates numerous distinct properties of semiconductor materials and thus plays a conclusive role in the photocatalysis applications. In this work, two kinds of BiOI nanomaterials with different vacancies are synthesized via a facile solvothermal method. The positron annihilation analysis shows that the thinner BiOI nanosheets possess larger-sized vacancy than BiOI nanoplates. Thus, BiOI nanosheets show the enhanced separation efficiency of electron-hole pairs and adsorption ability for contaminants under visible light. The results are also validated with the first-principle computation. Therefore, higher photocatalytic activity to the photodegradation of tetracycline is observed from the nanosheets than that obtained from BiOI nanoplates. This work not only arouses attention to vacancies, but also opens up an avenue for precision design of vacancies to prepare novel photocatalytic materials driven under solar light.
中文翻译：
通过显着暴露的高能面和空缺工程增强BiOI纳米片的太阳能驱动光催化活性。
由于空位有利于光催化反应，因此增加暴露的高能面的应用是提高光催化剂的光催化性能的有效策略。空位支配着半导体材料的许多独特特性，因此在光催化应用中起着决定性的作用。本文通过一种简便的溶剂热法合成了两种具有不同空位的BiOI纳米材料。正电子an没分析表明，比BiOI纳米板更薄的BiOI纳米片具有更大的空位。因此，BiOI纳米片在可见光下显示出增强的电子-空穴对分离效率和对污染物的吸附能力。第一原理计算也验证了结果。因此，与从BiOI纳米板获得的相比，从纳米片观察到更高的对四环素光降解的光催化活性。这项工作不仅引起人们对空位的关注，而且还为精确设计空位开辟了一条途径，以制备在阳光下驱动的新型光催化材料。
更新日期：2020-02-07
中文翻译：
通过显着暴露的高能面和空缺工程增强BiOI纳米片的太阳能驱动光催化活性。
由于空位有利于光催化反应，因此增加暴露的高能面的应用是提高光催化剂的光催化性能的有效策略。空位支配着半导体材料的许多独特特性，因此在光催化应用中起着决定性的作用。本文通过一种简便的溶剂热法合成了两种具有不同空位的BiOI纳米材料。正电子an没分析表明，比BiOI纳米板更薄的BiOI纳米片具有更大的空位。因此，BiOI纳米片在可见光下显示出增强的电子-空穴对分离效率和对污染物的吸附能力。第一原理计算也验证了结果。因此，与从BiOI纳米板获得的相比，从纳米片观察到更高的对四环素光降解的光催化活性。这项工作不仅引起人们对空位的关注，而且还为精确设计空位开辟了一条途径，以制备在阳光下驱动的新型光催化材料。
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