Growth mechanism and photocatalytic activity of chrysanthemum-like anatase TiO2 nanostructures |
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| Affiliation: | 1. School of Physics and Materials Science, Anhui University, 111 Jiulong Road, Hefei 230601, PR China;2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, PR China;1. Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran;2. Department of Pharmaceutics, Faculty of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran;3. Dental Materials Research Center, Isfahan University of Medical Sciences, Isfahan, Iran;4. Department of Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA;1. Department of Physics, Islamia College University Peshawar, 25120 KP, Pakistan;2. Department of Materials Science and Engineering, University of Sheffield, S1 3JD UK;1. Department of Mechanics, Damavand Branch, Islamic Azad University, Damavand, Iran;2. Advanced Materials Research center, Faculty of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran;3. Department of Mathematics, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran;1. Department of Physics and Key Laboratory of Mineral Cleaner Production and Exploitation of Green Functional Materials of Hunan Province, Jishou University, Jishou 416000, China;2. School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China |
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| Abstract: | Chrysanthemum-like hierarchical anatase TiO2 nanostructures self-assembled by nanorods have been successfully fabricated by a simple solvothermal route without using template materials or structure-directing additives. The products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Raman spectrometer system (Raman), UV–vis absorption spectroscopy (UV–vis) and N2 adsorption–desorption measurement. The results indicate that synthesized chrysanthemum-like hierarchical anatase TiO2 nanostructures have a spherical shape with an average diameter of 1.5 μm and they are composed of nanorods with a width of about 30 nm and a length of about 300 nm. The pore distribution of the sample exhibits two kinds of pores. Such mesoporous structure of the sample might be extremely useful in photocatalysis because they possess efficient transport pathways to the interior and supplies higher specific area for more pollutant molecules to be absorbed. In addition, the synthesized TiO2 nanostructures show enhanced photocatalytic activity compared with commercial P25 for the degradation of RhB under UV light irradiation, which can be attributed to their special hierarchical structure and high light-harvesting capacity. |
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| Keywords: | A Powders: chemical preparation B Spectroscopy Photocatalytic activity |
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