Solar hydrogen production of ZnO horn electrodeposited on carbon film |
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| Affiliation: | 1. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;2. State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;1. Material Science Laboratory, Department of Electronic Science, University of Delhi South Campus, Benito Juarez Road, New Delhi 110021, India;2. Department of Electronics, SGTB Khalsa College, University of Delhi, Delhi 110007, India;3. Department of Electronics, BCAS, University of Delhi, New Delhi 110075, India;1. Atatürk University, Sciences Faculty, Department of Chemistry, 25240 Erzurum, Turkey;2. Atatürk University, East Anatolian High-Technology Research and Application Center, 25240 Erzurum, Turkey;1. Laboratory Physico-Chemistry of Advanced Materials, University of Djillali Liabes, BP 89, Sidi- Bel- Abbes 22000, Algeria;2. Institute of Nano Electronic Engineering, University Malaysia Perlis, 01000 Kangar, Perlis, Malaysia;3. Materials Science Laboratory, School of Physics, Vigyan Bhavan, Devi Ahilya University, Khandwa Road Campus, Indore 452001, India;4. Djillali Liabes University, Faculty of Exact Sciences, Department of Physics, PO Box 089, Sidi Bel Abbes 22000, Algeria;1. School of Physical Science and Technology, Southwest Jiaotong University, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Chengdu 610031, People''s Republic of China;2. Bond and Band Engineering Group, Sichuan Provincial Key Laboratory (for Universities) of High Pressure Science and Technology, Southwest Jiaotong University, Chengdu 610031, People''s Republic of China;3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an 710072, People''s Republic of China;1. Department of Physics, Manonmaniam Sundaranar University, Tirunelveli 627012, Tamilnadu, India;2. CISL, Department of Physics, Annamalai University, Annamalai Nagar 608002, Tamilnadu, India |
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| Abstract: | Solar hydrogen production by ZnO electrodeposited onto carbon films was systematically investigated by controlling the amount of the deposited ZnO, property of carbon, and surface activation by KOH treatment. Carbon films have been prepared by polymer solution casting method using PAN solution, and subsequently annealing process. The surface of carbon film became made more porous by chemically activating using KOH. And then, by electrochemical deposition, single crystalline ZnO horn was loaded on both carbon film and activated carbon film to ZnO-based hetero photocatalysts. Electrochemical deposition has been carried out to investigate the effect of ZnO-loading amount by varying deposition condition such as deposition time and concentration of zinc acetate solution. The size of ZnO horn deposited was highly dependent on initial concentration of Zn precursor and deposition time. The measurement of hydrogen production showed that photocatalytic ZnO has produced hydrogen 1.65 and 1.68 times more when deposited on non-activated carbon film and activated carbon film, respectively, than ZnO nanoparticle alone, on account of fast electron transfer due to high electrical conductivity of carbon film. Whereas, by chemically activating carbon film to activated carbon film through the base treatment, hydrogen production was increased only 1.02 times as much as that by ZnO deposited on non-activated carbon film. In this work, the results were discussed and reasoned and it was suggested that characteristics of carbon film would play the most important key role on enhancement of hydrogen production using ZnO-based hetero photocatalysts among various factors. |
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| Keywords: | Photocatalyst Carbon ZnO Hydrogen production |
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