Nanostructure SnO2 and supported Au catalysts: Synthesis,characterization, and catalytic oxidation of CO |
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| Affiliation: | 1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou, 310027, China;2. Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, China;1. Department of Municipal & Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China;2. NEST Lab, Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China;3. Department of Physics, King Saud University, Riyadh 11451, Saudi Arabia;4. State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;1. College of Science, Donghua University, Shanghai 201620, China;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;1. Shizuoka Institute of Science and Technology, 437-8555, Toyosawa 2200-2, Fukuroi, Shizuoka, Japan;2. APCO Ltd., 192-0906, Kitano-cho 522-10, Hachioji, Tokyo, Japan;1. Key Laboratory of Yunnan Higher Education Institutes for Optoelectric Information &Technology, Kunming 650500, People''s Republic of China;2. Key Laboratory of Yunnan Normal University for Photoelectric Materials & Device, Kunming 650500, People''s Republic of China;3. Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, People''s Republic of China;4. State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, People''s Republic of China |
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| Abstract: | Nanostructure tin dioxide (SnO2) powders prepared by sol-gel dialytic processes using tin (IV) chloride and anhydrous alcohol as start materials, ammonia gas as catalyst of the formation of colloid solution and agent of removing Cl−, and by introducing dialytic processes to improve and accelerate the formation of gels. From the result of TG–DTA analyses, the dried samples were calcined at 673 K in air for 3 h. Tin dioxide nanoparticles were characterized by thermogravimetry and differential thermal analyses (TG–DTA), X-ray diffraction (XRD), nitrogen adsorption–desorption, X-ray photoelectron spectroscopy (XPS). The average particle size of the as-prepared tin dioxide was about 5 nm. The as-prepared SnO2 possessed mesoporous structure and large surface area. The Au/SnO2 catalysts for low-temperature CO oxidation were prepared by the deposition–precipitation method using as-prepared SnO2 powders as the support. The Au/SnO2 catalysts exhibited high catalytic activity for low-temperature CO oxidation. The nanostructure SnO2 has promising applications in sensor, catalyst, catalytic support, mesoporous membranes, etc. |
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