Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Facile Fabrication of Ultrafine Hollow Silica and Magnetic Hollow Silica Nanoparticles by a Dual-Templating Approach | Nanoscale Res Lett 2010 5 116-123 DOI S11671-009-9452-1 NANO EXPRESS Facile Fabrication of Ultrafine Hollow Silica and Magnetic Hollow Silica Nanoparticles by a Dual-Templating Approach Wei Wu Xiangheng Xiao Shaofeng Zhang Lixia Fan Tangchao Peng Feng Ren Changzhong Jiang Received 2 September 2009 Accepted 24 September 2009 Published online 10 October 2009 to the authors 2009 Abstract The development of synthetic process for hollow silica materials is an issue of considerable topical interest. While a number of chemical routes are available and are extensively used the diameter of hollow silica often large than 50 nm. Here we report on a facial route to synthesis ultrafine hollow silica nanoparticles the diameter of ca. 24 nm with high surface area by using cetyltrimethy-lammmonium bromide CTAB and sodium bis 2-ethyl-hexyl sulfosuccinate AOT as co-templates and subsequent annealing treatment. When the hollow magnetite nanoparticles were introduced into the reaction the ultrafine magnetic hollow silica nanoparticles with the diameter of ca. 32 nm were obtained correspondingly. Transmission electron microscopy studies confirm that the nanoparticles are composed of amorphous silica and that the majority of them are hollow. Keywords Hollow silica nanoparticles Fe3O4 Dual-templates Magnetic nanoparticles W. Wu C. Jiang El Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education Wuhan University 430072 Wuhan People s Republic of China e-mail czjiang@ W. Wu X. Xiao S. Zhang T. Peng F. Ren C. Jiang Center for Electronic Microscopy and Department of Physics Wuhan University 430072 Wuhan People s Republic of China L. Fan School of Materials and Metallurgy Wuhan University of Science and Technology 430081 Wuhan People s Republic of China Introduction Nanoparticles are submicron moieties diameters ranging from 1 to 100 nm according to the used term although there are examples of nanoparticles several hundreds of nanometers in .
