Novel sonochemical synthesis of Zn2V2O7 nanostructures for electrochemical hydrogen storage |
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| Affiliation: | 1. New Technology Faculty, Semnan University, Semnan, Iran;2. Department of Chemical Engineering, University of Bonab, P.O. Box. 5551761167, Bonab, Iran;3. Department of Chemistry, Semnan University, Semnan 35195-363, Iran;1. Faculty of Environmental Science and Engineering, Key Laboratory of Petrochemical Pollution Process and Control, Guangdong Province, China;2. School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou, 341000, Jiangxi, China;3. School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China;4. Department of Chemistry, Changsha University of Science and Technology, Changsha, 410114, Hunan, China;1. Department of Physics, University of the Free State (Qwaqwa), Private Bag ×13, Phuthaditjhaba 9866, South Africa;2. Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa;1. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran 15875-4413, Iran;2. Color & Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran 15875-4413, Iran;3. Department of Physics, Sharif University of Technology, Tehran 11155-9161, Iran;4. School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;5. INRS Centre for Energy, Materials and Telecommunications, Varennes, QC J3X1P7, Canada;1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317– 51167, Iran;2. Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran;1. Departamento de Física Aplicada-ICMUV, Universidad de Valencia, Dr. Moliner 50, Burjassot, 46100, Valencia, Spain;2. DCITIMAC, MALTA Consolider Team, Universidad de Cantabria, 39005, Santander, Spain;3. Institute of Earth Sciences Jaume Almera, MALTA Consolider Team, CSIC, 08028, Barcelona, Spain;4. Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;5. CELLS-ALBA Synchrotron Light Facility, Cerdanyola, 08290, Barcelona, Spain |
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| Abstract: | Although utilization of diverse classes of metal oxides as hydrogen storage materials has been reported, but there is still a major need to introduce efficient materials. Herein, mesoporous Zn2V2O7 nanostructures were produced by a new sonochemical method using hydrazine, zinc nitrate, and ammonium vanadate as the starting reagents and then annealed at 700 °C. Prior to annealing, Zn3V3O8 was produced in the presence of ultrasonic waves, whereas in the absence of ultrasonic waves, Zn2(VO4)2 was the major product. In fact, ultrasonic waves interfered with the reaction mechanism and reduced V5+ to V4+ and V3+. Because of the proper composition and structure of these nanostructures, they were used for electrochemical storage of hydrogen. Storage of over 2899 mAh/g after 20 cycles by flower-like nanostructures revealed their high capability. The results also showed that morphology affects efficiency such that three-dimensional spherical nanostructures had a storage capacity of 2247 mAh/g after 20 cycles. |
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| Keywords: | Nanostructure Nanoporous Sonochemical method Hydrogen storage BET" },{" #name" :" keyword" ," $" :{" id" :" kwrd0040" }," $$" :[{" #name" :" text" ," _" :" Brunauer Emmett Teller CTAB" },{" #name" :" keyword" ," $" :{" id" :" kwrd0050" }," $$" :[{" #name" :" text" ," _" :" Cetyltrimethylammonium bromide EDS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0060" }," $$" :[{" #name" :" text" ," _" :" Energy dispersive spectroscopy EG" },{" #name" :" keyword" ," $" :{" id" :" kwrd0070" }," $$" :[{" #name" :" text" ," _" :" Ethylene glycol FESEM" },{" #name" :" keyword" ," $" :{" id" :" kwrd0080" }," $$" :[{" #name" :" text" ," _" :" Field emission scanning electron microscopy FT-IR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0090" }," $$" :[{" #name" :" text" ," _" :" Fourier transform infrared PVP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0100" }," $$" :[{" #name" :" text" ," _" :" Polyvinylpyrrolidone 3D nanostructures" },{" #name" :" keyword" ," $" :{" id" :" kwrd0110" }," $$" :[{" #name" :" text" ," _" :" Three-dimensional nanostructures XRD" },{" #name" :" keyword" ," $" :{" id" :" kwrd0120" }," $$" :[{" #name" :" text" ," _" :" X-ray diffraction |
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