Facile in situ synthesis of a Bi/BiOCl nanocomposite with high photocatalytic activity
Facile in situ synthesis of a Bi/BiOCl nanocomposite with high photocatalytic activity
复制标题
轻松原位合成具有高光催化活性的 Bi/BiOCl 纳米复合材料
DOI：
10.1039/c2ta01004f
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Liu, Ping
中科院分区：
文献类型：
--
作者：
Weng, Sunxian;Chen, Binbin;Liu, Ping
本文提出了一种新的和简单的方法，通过紫外光诱导化学还原路线在温和的条件下原位制备具有主导（001）面的Bi/BiOCl纳米复合材料。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、透射扫描电子显微镜（TEM）、紫外-可见漫反射光谱（DRS）、拉曼散射、光致发光光谱（PL）和电子自旋共振谱（ESR）等表征技术对Bi/BiOCl纳米复合材料的结构和性能进行了研究。通过光电化学实验研究了在BiOCl纳米片上沉积Bi前后光电响应的变化。研究发现，Bi金属的加入可以调节样品的光学和电学性质。将Bi原位掺入到半导体BiOCl纳米片中可以有效地提高BiOCl光催化降解橙子的性能。据我们所知，这是第一次Bi/BiOCl纳米复合材料已被用作光催化剂，用于在温和条件下降解污染物。Bi/BiOCl纳米复合材料的高光降解活性可以归因于Bi金属的存在，其可以增强光吸收强度，有效地分离光生电子-空穴对，并加速界面电荷转移速率。
This paper presents a novel and facile method to fabricate a Bi/BiOCl nanocomposite with dominant (001) facets in situ via a UV light-induced chemical reduction route under mild conditions. Different characterization techniques, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission scanning electron microscopy (TEM), UV-vis diffuse reflectance spectrometry (DRS), Raman scattering, photoluminescence spectroscopy (PL), and electron spin resonance spectroscopy (ESR), have been used to investigate the structure and properties of the Bi/BiOCl nanocomposite. The variation in the photoelectric response before and after the deposition of Bi on the BiOCl nanosheets is investigated by a photoelectrochemical experiment. It is found that the properties of the samples, including their optical and electrical properties, can be tuned by the addition of Bi metal. The in situ incorporation of Bi into the semiconductor BiOCl nanosheets can efficiently enhance the photocatalytic performance of BiOCl for the degradation of methyl orange (MO). To the best of our knowledge, it is the first time a Bi/BiOCl nanocomposite has been utilized as a photocatalyst for the degradation of pollutants under mild conditions. The high photodegradation activity of the Bi/BiOCl nanocomposite can be ascribed to the presence of Bi metal, which can enhance the light absorption intensity, efficiently separate photogenerated electron–hole pairs, and accelerate the interfacial charge-transfer rate.