Strong tribocatalysis of strontium titanate nanofibers through harvesting friction energy for dye decomposition |
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| Affiliation: | 1. College of Science, Xi''an University of Posts and Telecommunications, Xi''an, 710121, PR China;2. College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua, 321004, PR China;3. Qingdao Haier Smart Technology R & D Co., Ltd, Qingdao, 266100, PR China;4. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China;5. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, and CAS Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, PR China;6. Xi''an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi''an Polytechnic University, Xi''an, 710000, PR China |
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| Abstract: | Friction is a common clean energy and can be harvested and converted into electricity energy via triboelectricity, which can electrochemically drive dye decomposition in theory. In this work, the tribocatalytic Rhodamine B dye decomposition has been experimentally realized in strontium titanate (SrTiO3) nanofibers, which are synthesized via a hydrothermal method. In the tribocatalytic dye decomposition process, the friction is exerted in the interface between catalyst surface and a polytetrafluoroethylene (PTFE) Teflon rod setup with the different stirring speed. The RhB dye decomposition ratios of SrTiO3 nanofibers at these stirring speeds of 200 rpm, 400 rpm, 600 rpm, and 800 rpm are respectively 24.2%, 51.8%, 73.9% and 88.6%, yielding to these reaction rate constants of ～0.0112 h?1, ～0.0260 h?1, ～0.0562 h?1 and ～0.0877 h?1. The main active species, which play an important role in tribocatalytic process, are the superoxide radicals and holes on basis of the active species quenching experiment results. The excellent tribocatalysis activity makes SrTiO3 nanofibers potential for application in dye wastewater treatment through utilizing the environmental friction energy. |
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| Keywords: | Tribocatalysis Stirring speed Dye decomposition |
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