Enhanced photocatalytic activities of vandium and molybdenum co-doped strontium titanate under visible light |
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| Authors: | Van-Quoc-Truong Hoang T-Que-Phuong Phan Velusamy Senthilkumar Van-Thuan Doan Yong Soo Kim Minh-Vien Le |
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| Affiliation: | 1. Faculty of Chemical Engineering, Ho Chi Minh City University of Technology, VNU-HCM, Ho Chi Minh City, Viet Nam;2. Department of Applied Physics, Papua New Guinea University of Technology, Lae, Morobe, Papua New Guinea;3. Department of Physics and Energy Harvest-Storage Research Center, University of Ulsan, Ulsan, Korea |
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| Abstract: | In this report, undoped, mono and co-doped perovskite strontium titanate (SrTi1−(x+y)MoxVyO3) were synthesized by the sol-gel method, and their physical and optical properties were investigated. Furthermore, the photocatalytic degradation activities of the synthesized powders were conducted in 10 ppm methylene blue solution under visible-light irradiation. A maximum degradation efficiency of 91.5% was achieved in SrTi0.9Mo0.05V0.05O3 powder whereas only 59.9% of degradation was found in undoped SrTiO3. The improved efficiency in co-doped SrTiO3 was due to the doping of metal cations, Mo+6 and V+5 in the host lattice, which created impurity defect states thereby effectively reducing the bandgap energy of the semiconductor. |
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| Keywords: | codoped SrTiO3 photocatalysis photodegradation sol-gel method |
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