Shen Shijie, Yan Linghui, Song Kai, Lin Zhiping, Wang Zongpeng, Du Daming, Zhang Huanhuan
School of Materials Science and Engineering, Lanzhou University of Technology Lanzhou 730050 China.
Xuanda Industrial Group Co., Ltd Wenzhou 325105 China.
RSC Adv. 2020 Nov 17;10(69):42008-42013. doi: 10.1039/d0ra09272j.
Degrading organic pollutants using a photocatalyst under visible light is one of the effective ways to solve the increasingly serious environmental pollution problem. In this work, we have loaded a small amount of NiSe nanoflakes on the surface of CdS using a simple and low-cost solvothermal synthesis method. The samples were characterized with detailed X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), photocurrent, photoluminescence spectrometer (PL), photocatalytic properties, The results show that a 2 mol% load of NiSe increases the rate of degradation of Rhodamine B (RhB) to more than twice the original rate (0.01000 min 0.00478 min). Meanwhile, the sample has excellent stability. The improved photocatalytic properties can be attributed to the face-to-face contact between the nanoflakes, accelerated separation and transfer of photon-generated carriers. This work provides a suitable co-catalyst that can be used to optimize the performance of other photocatalytic materials.
在可见光下使用光催化剂降解有机污染物是解决日益严重的环境污染问题的有效方法之一。在这项工作中，我们采用简单且低成本的溶剂热合成方法在硫化镉（CdS）表面负载了少量硒化镍（NiSe）纳米片。通过详细的X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、电化学阻抗谱（EIS）、光电流、光致发光光谱仪（PL）对样品进行了表征，并测试了其光催化性能。结果表明，2 mol%负载量的NiSe将罗丹明B（RhB）的降解速率提高到原来速率（0.01000 min⁻¹ 对比0.00478 min⁻¹）的两倍多。同时，该样品具有优异的稳定性。光催化性能的提高可归因于纳米片之间的面对面接触、光生载流子的加速分离和转移。这项工作提供了一种合适的助催化剂，可用于优化其他光催化材料的性能。
