Effect of Fe doping on the structural and gas sensing properties of ZnO porous microspheres |
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| Affiliation: | 1. State key lab of powder metallurgy, Central South University, Changsha 410083, China;2. Department of Inorganic Materials, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China;1. Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science & Engineering, Shaanxi Normal University, Xi''an 710062, China;2. School of Science, Xi''an Technological University, Xi''an 710032, China;3. Dalian Institute of Chemical Physics, National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, 116023, China;4. Xinjiang University, China;1. School of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230012, PR China;2. Nanomaterials and Environment Detection Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, PR China;3. Department of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, PR China;4. Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China;2. Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Department of Physics, Shivaji University, Kolhapur 416-009, India;2. Department of Physics, Karmaveer Hire Arts, Science, Commerce and Education College, Gargoti 416-009, India;3. Department of Materials Science and Engineering, Chonnam National University, Gwangju 500-757, South Korea;4. School of Nano-Science and Technology, Shivaji University, Kolhapur 416-009, India |
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| Abstract: | Fe-doped ZnO porous microspheres composed of nanosheets were prepared by a simple hydrothermal method combined with post-annealing, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller N2 adsorption–desorption measurements and photoluminescence (PL) spectra. In this paper we report Fe doping induced modifications in the structural, photoluminescence and gas sensing behavior of ZnO porous microspheres. Our results show that the crystallite size decreases and specific surface area increases with the increase of Fe doping concentration. The PL spectra indicate that the 4 mol% Fe-doped ZnO has higher ratio of donor (VO and Zni) to acceptor (VZn) than undoped ZnO. The 4 mol% Fe-doped ZnO sample shows the highest response value to ppb-level n-butanol at 300 °C, and the detected limit of n-butanol is below 10 ppb. In addition, the 4 mol% Fe -doped ZnO sample exhibits good selectivity to n-butanol. The superior sensing properties of the Fe-doped porous ZnO microspheres are contributed to higher donor defects contents combined with larger specific surface area. |
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| Keywords: | B. Chemical synthesis C. Electron microscopy D. Electrical properties |
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