Visible light driven photosplitting of water using one dimensional Mg doped ZnO nanorod arrays |
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| Affiliation: | 1. Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, Jharkhand, India;2. Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, Jharkhand, India;1. Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;2. Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China;2. School of Materials Science and Engineering, Guangxi University, Nanning 530004, China;1. Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India;2. Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India;1. Department of Chemistry, Lovely Professional University, Punjab 144411, India;2. Department of Chemical Engineering, Malaviya National Institute of Technology, Jaipur, India;3. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam;4. Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Viet Nam;5. Faculty of Chemistry, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam; Key Laboratory of Advanced Materials for Green Growth, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam;1. Solar Energy Research Laboratory, Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826 004, India;2. Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, 741 246, India;3. Surface Physics and Material Science Department, Saha Institute of Nuclear Physics, Kolkata, 700 064, India |
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| Abstract: | In the present work, we have introduced Mg doped ZnO nanorods based photoanodes for photoelectrochemical water splitting applications. Vertically aligned Mg doped ZnO nanorods were fabricated by sol-gel and hydrothermal technique. The as-prepared nanorod samples exhibited hexagonal wurtzite structure as confirmed from XRD measurements. We achieved a photocurrent density of 0.35 mA/cm2 at 1.5 V vs. Ag/AgCl for 10% Mg doped ZnO photoanode which is 9 times higher than that of undoped ZnO nanorods (0.03 mA/cm2). Incorporation of Mg resulted in faster charge transport and longer life time of electrons with reduced recombination rate. Mg dopant tuned the optical band gap of ZnO and increased the carrier concentration boosting the PEC performance of the photoanodes. Since seawater is one of the most abundant natural resource on earth, we further carried out seawater splitting of 10MgZ under visible light illumination which indicated its high photostability in natural seawater for 5 h of continuous illumination. |
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| Keywords: | Mg doped ZnO Nanorods Water splitting Photoconversion efficiency |
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