Sun Xiaoming, Lu Jia, Wu Jiang, Guan Dayong, Liu Qizhen, Yan Naiqiang
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; Environmental Science and Engineering College, Shanghai Jiao Tong University, Shanghai 200240, China.
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
J Colloid Interface Sci. 2019 Jun 15;546:32-42. doi: 10.1016/j.jcis.2019.03.049. Epub 2019 Mar 15.
A one-pot synthetic approach to prepare self-assembled BiOI/BiOCl microflowers by a template-free coprecipitation method at room temperature has been developed. The physicochemical structure of BiOI/BiOCl microflowers were characterized using transmission electron microscopy (TEM), high resolution TEM (HRTEM), scanning electron microscopy (SEM). The composition information and bonding energy structure of the BiOI/BiOCl microflowers were studied by X-ray diffraction (XRD) and high-resolution X-ray photoelectron spectra (XPS), Fourier Transform Infrared Spectroscopy (FTIR), UV-vis diffuse reflectance spectroscopy (DRS) analysis and photoluminescence (PL) spectra. The photocatalytic performance of as-prepared BiOI/BiOCl microflowers was tested through photocatalytic oxidation of gas-phase mercury, as a useful catalyst (or additive) in wet electrostatistic precipitator (WESP) to capture heavy metals including mercury. The results show that the prepared BiOI/BiOCl samples demonstrate higher photocatalytic efficiency than pure BiOI or BiOCl. By optimizing the component ratio of the BiOI and BiOCl, up to 72.2% oxidation efficiency can be achieved in BiOI/BiOCl microflowers. Finally, the photocatalytic influence of BiOI/BiOCl microflowers on gas-phase mercury oxidation had been proposed.
已经开发出一种在室温下通过无模板共沉淀法制备自组装BiOI/BiOCl微花的一锅合成方法。使用透射电子显微镜（TEM）、高分辨率TEM（HRTEM）、扫描电子显微镜（SEM）对BiOI/BiOCl微花的物理化学结构进行了表征。通过X射线衍射（XRD）、高分辨率X射线光电子能谱（XPS）、傅里叶变换红外光谱（FTIR）、紫外可见漫反射光谱（DRS）分析和光致发光（PL）光谱研究了BiOI/BiOCl微花的组成信息和键能结构。通过气相汞的光催化氧化测试了所制备的BiOI/BiOCl微花的光催化性能，其作为湿式静电除尘器（WESP）中捕获包括汞在内的重金属的有用催化剂（或添加剂）。结果表明，所制备的BiOI/BiOCl样品表现出比纯BiOI或BiOCl更高的光催化效率。通过优化BiOI和BiOCl的组分比例，BiOI/BiOCl微花的氧化效率可达到72.2%。最后，提出了BiOI/BiOCl微花对气相汞氧化的光催化影响。
