首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Photodegradation of dye pollutants on one-dimensional TiO2 nanoparticles under UV and visible irradiation
Institution:1. College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China;2. Centre for Molecular Science, Institute of Chemistry, The Chinese Academy of Science, Beijing 100080, China;3. School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia;4. Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China;1. Chemistry Department, Faculty of Science, Benha University, Benha, Egypt;2. Agricultural Genetic Engineering Research Institute (AGERI), Giza, Egypt;3. Biology Department, Faculty of Applied Sciences, Umm Al Qura University, Makkah, Saudi Arabia;4. Chemistry Department, Faculty of Applied Sciences, Umm Al Qura University, Makkah, Saudi Arabia;1. College of Materials Science and Energy Engineering, Foshan University, Foshan, Guangdong 528000, China;2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China;1. Department of Physics, Indian Institute of Science, Bengaluru, 560012 Karnataka, India;2. Department of Chemistry, School of Engineering and Technology, CMR University, Bengaluru, 562149, Karnataka, India
Abstract:Titanium dioxides (TiO2) nanoparticles with one-dimensional (1D) geometry, nanorods and nanostripes, were used as photocatalysts to photodegrade Rhodamine B (RhB) under ultraviolet (UV) and visible irradiation. The nanorods catalyst exhibited very interesting photocatalytic properties: under the UV irradiation its catalytic activity was slightly below that of the well-known TiO2 catalyst P25, while under visible light it exhibited a better activity than P25.This fact indicates that the nanorods have a superior ability to utilize less energetic but more abundant visible light. Moreover, the 1D TiO2 nanoparticles can be readily separated from aqueous suspensions by sedimentation after the reaction. With these advantages the 1D TiO2 catalysts have a great potential for environmental applications. Various analytical techniques were employed to characterize TiO2 catalysts and monitor the photocatalytic reaction. It was found that the catalytic performance of the catalysts is greatly dependent on their structures: The superior activity of P25 (consists of anatase and rutile nanocrystals) under UV light results probably from the interfacial interaction between anatase and rutile nanocrystals in this solid, which do not exist in the nanorods (only anatase). The titanate nanostripes (titanate) can absorb UV photons with shorter wavelength only.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号