Development of niobium doped tin oxide nanostructure via hydrothermal route for photocatalytic degradation of methylene blue and antimicrobial study |
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| Affiliation: | 1. School of Advanced Materials and Nanotechnology, Xidian University, Xi''an, 710071, China;2. National Ceramic Industry Design Institute of China, Quanzhou, 362500, China;3. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;1. National Engineering Research Center for Mechanical Product Remanufacturing, Army Academy of Armored Forces, Beijing, 100072, China;2. National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing, 100072, China;3. School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China;1. Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668, Warsaw, Poland;2. International Research Centre MagTop, Aleja Lotnikow 32/46, PL-02668, Warsaw, Poland;3. Department of Chemistry, University of Helsinki, P.O. Box 55, FI‐00014, Helsinki, Finland;4. Institute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of Technology, Str. Gen Sylwestra Kaliskiego 2, 00-908, Warsaw, Poland;5. Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland;1. College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China;2. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China;1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China;2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, China |
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| Abstract: | In this work, we discuss the effect of niobium (Nb) doping concentrations of 2% and 4% on the physicochemical characteristics and photocatalytic properties of tin dioxide nanostructure, which were successfully developed by a basic hydrothermal route. Nb-doped SnO2 were characterized with regards to their optical, structural and photocatalytic features. X-ray diffraction (XRD) analyses display that both pristine and doped tin dioxide had a fine crystalline structure having tetragonal structure. Scanning electron microscopy (SEM) analysis shows that materials exhibited the irregular shaped nanoparticles morphology. Optical absorption analysis using UV–visible spectroscopy revealed a redshift in the bandgap energy for Nb3+ doped SnO2 nanoparticles. Methylene blue aqueous (MB) dye was degraded by 93.78% in 120 min when exposed to 4% Nb doped SnO2 NPs under visible light. The 4% Nb doped SnO2 shows elevated photocatalytic activity owing to their greater surface area containing greater active zones responsible for adsorption of larger dye species and good structural stability. Similarly, the 4% Nb doped SnO2 photocatalysts maintained their excellent stability and photodegradation efficiency over 89% even after being subjected to 5th cycles. The scavenger analysis demonstrates that the superoxide (O2) radical, a major active substance, performed a crucial role in the mineralization of the aqueous MB dye. The 4% Nb doped SnO2 also shows remarkable antimicrobial activity. Our finding suggests that doping strategy considered as efficient method that can help to increase the photocatalytic and antimicrobial activity. |
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| Keywords: | Doping strategy Photocatalytic study Methylene blue Antimicrobial study |
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