Panahi-Kalamuei Mokhtar, Mousavi-Kamazani Mehdi, Salavati-Niasari Masoud, Hosseinpour-Mashkani S Mostafa
Institute of Nano Science and Nano Technology, University of Kashan, P. O. Box 87317-51167, Kashan, Iran.
Young Researchers and Elites Club, Kashan Branch, Islamic Azad University, Kashan, Iran.
Ultrason Sonochem. 2015 Mar;23:246-56. doi: 10.1016/j.ultsonch.2014.09.006. Epub 2014 Sep 16.
Selenium (Se) nanostructures were synthesized by a sonochemical method using SeCl₄ as a new precursor for Se nanostructures. Moreover, hydrazine, potassium borohydride, and thioglycolic acid were used as reducing reagents in aqueous solution. Ultrasonic power, irradiation time, reducing agent, solvent, HCl, NaOH, and the surfactant were changed in order to investigate the effect of preparation parameters on the morphology and particle size of selenium. The obtained Se with different morphologies and sizes was characterized by XRD, SEM, TEM, EDS, and DRS. The selenium nanostructures exhibited enhanced photocatalytic activity in the degradation of methylene blue (MB) under visible light irradiation. Furthermore, to examine the solar cell application of as-synthesized selenium nanostructure, FTO/TiO₂/Se/Pt-FTO and FTO/Se/CdS/Pt-FTO structures were created by deposited selenium film on top of the TiO₂ layer and FTO glass prepared by Doctor's blade method, respectively.
采用声化学方法，以四氯化硒（SeCl₄）作为硒纳米结构的新型前驱体，合成了硒（Se）纳米结构。此外，在水溶液中使用肼、硼氢化钾和巯基乙酸作为还原剂。通过改变超声功率、辐照时间、还原剂、溶剂、盐酸（HCl）、氢氧化钠（NaOH）和表面活性剂，研究制备参数对硒的形态和粒径的影响。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱仪（EDS）和漫反射光谱（DRS）对获得的具有不同形态和尺寸的硒进行了表征。硒纳米结构在可见光照射下对亚甲基蓝（MB）的降解表现出增强的光催化活性。此外，为了研究合成的硒纳米结构在太阳能电池中的应用，分别通过刮刀法在TiO₂层顶部沉积硒膜以及在FTO玻璃上制备了FTO/TiO₂/Se/Pt - FTO和FTO/Se/CdS/Pt - FTO结构。
