Guerrero Miguel, Altube Ainhoa, García-Lecina Eva, Rossinyol Emma, Baró Maria Dolors, Pellicer Eva, Sort Jordi
Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona , E-08193 Bellaterra, Spain.
ACS Appl Mater Interfaces. 2014 Aug 27;6(16):13994-4000. doi: 10.1021/am5033549. Epub 2014 Jul 18.
A novel nanocomposite material made of two-dimensional BiOCl nanoplates assembled into highly porous titania has been successfully prepared following a facile sol-gel reaction. Both the TiO2 (anatase) and BiOCl components are crystalline as demonstrated by X-ray diffraction and transmission electron microscopy analyses. TiO2 exhibits a highly porous network and possesses a small crystallite size, whereas BiOCl forms micrometer-sized plates with nanometer thicknesses. Aqueous photocatalytic activity tests with this novel material have been performed on photodegradation of Rhodamine B under ultraviolet-visible light irradiation. Interestingly, the attachment of the BiOCl nanoplates to the TiO2 network significantly enhances the photocatalytic activity of the material compared to that of pure TiO2 due to the formation of BiOCl/TiO2 heterojunctions. Thus, this pertinent synergistic combination of TiO2 and BiOCl proves to be a promising strategy for the large-scale production of a new generation of photocatalysts with excellent properties for the degradation of organic pollutants.
通过简便的溶胶-凝胶反应，成功制备了一种由二维BiOCl纳米片组装成高度多孔二氧化钛的新型纳米复合材料。X射线衍射和透射电子显微镜分析表明，TiO₂（锐钛矿）和BiOCl组分均为晶体。TiO₂呈现出高度多孔的网络结构，且微晶尺寸较小，而BiOCl则形成了具有纳米厚度的微米级薄片。对该新型材料进行了水相光催化活性测试，以研究其在紫外-可见光照射下对罗丹明B的光降解性能。有趣的是，由于形成了BiOCl/TiO₂异质结，BiOCl纳米片与TiO₂网络的结合显著提高了该材料的光催化活性，相比于纯TiO₂。因此，TiO₂和BiOCl这种相关的协同组合被证明是一种有前景的策略，可大规模生产具有优异性能的新一代光催化剂，用于降解有机污染物。
