Synthesis of black ultrathin BiOCl nanosheets for efficient photocatalytic H-2 production under visible light irradiation
Synthesis of black ultrathin BiOCl nanosheets for efficient photocatalytic H-2 production under visible light irradiation
复制标题
可见光照射下高效光催化产H-2的黑色超薄BiOCl纳米片的合成
DOI：
10.1016/j.jpowsour.2015.05.101
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发表时间：
2015
影响因子：
9.2
通讯作者：
Liu Chao
中科院分区：
文献类型：
--
作者：
Ye Liqun;Jin Xiaoli;Leng Yumin;Su Yurong;Xie Haiquan;Liu Chao
二维BiOCl纳米片沿着[001]方向的厚度控制内部电场强度。为了提高BiOCl的光催化性能，减小厚度是最佳的选择。本文在高粘度、高醇基浓度的甘油体系中合成了（001）晶面间距扩大、氧空位增多的黑色BiOCl纳米片（BU-BiOCl）。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、X射线光电子扫描电镜（SEM）、高分辨透射电镜（HRTEM）、电子自旋共振（ESR）、紫外-可见漫反射光谱（DRS）和光致发光（PL）光谱对其进行了表征。实验表征和理论计算结果还表明，合成的BU-BiOCl的晶面间距和氧空位的扩大提高了光生载流子的分离效率和光子吸收效率。可见光照射下，BU-BiOCl比BiOCl具有更高的产氢活性。
The thickness of 2D BiOCl nanosheets along [001] direction control the internal electric fields intensity. In order to enhance the photocatalytic properties of BiOCl, decreasing the thickness is the best choice. In this paper, black ultrathin BiOCl nanosheet (BU–BiOCl) with expanded spacing of the (001) crystal plane and oxygen vacancy was synthesized in high viscosity and alcohol group concentration glycerol system. It was characterized by X-ray diffraction patterns (XRD), X-ray photoelectron spectroscopy (XPS), X-ray photoelectron scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), electron spin resonance (ESR), UV–vis diffuse reflectance spectra (DRS) and photoluminescence (PL) spectra. The experimental characterization and theoretical calculation results also indicated that expanded facets spacing and oxygen vacancy of as-synthesized BU-BiOCl enhanced separation efficiency of photoinduced carriers and photon absorption efficiency. Therefore, BU-BiOCl showed higher activity than bulk BiOCl for H2production under visible light irradiation.