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One-step hydrothermal synthesis of Sn-doped α-Fe_(2)O_(3) nanoparticles for enhanced photocatalytic degradation of Congo red

查看全文 作　　者：Van Nang [1]Lam;Thi Bich [2,3]Vu;Quang Dat [1]Do;Thi Thanh Xuan [1]Le;Tien Dai [2,3]Nguyen;T-Thanh-Bao [4]Nguyen;Hoang Tung [4]Do;Thi Tu Oanh [5]Nguyen 高影响力作者 机构地区：[1]Department of Natural Sciences,Hoa Lu University,Ninh Nhat,Ninh Binh City,Viet Nam;[2]Institute of Theoretical and Applied Research,Duy Tan University,Hanoi 100000,Viet Nam;[3]Faculty of Natural Sciences,Duy Tan University,Da Nang 550000,Vietnam;[4]Institute of Physics,Vietnam Academy of Science and Technology,10 Dao Tan,Ba Dinh,Hanoi,Vietnam;[5]Institute of Materials Science,Vietnam Academy of Science and Technology,18 Hoang Quoc Viet,Caugiay,Hanoi,Vietnam高影响力机构 出　　处：《Journal of Semiconductors》索引2022年第43卷第12期,共10页高影响力期刊 基　　金：the financial support of Vietnam Academy of Science and Technology under project VAST01.04/18-19. 摘　　要：We report on the synthesis of Sn-doped hematite nanoparticles(Sn-α-Fe_(2)O_(3) NPs)by the hydrothermal method.The prepared Sn-α-Fe_(2)O_(3) NPs had a highly pure and well crystalline rhombohedral phase with an average particle size of 41.4 nm.The optical properties of as-synthesizedα-Fe_(2)O_(3) NPs show a higher bandgap energy(2.40-2.57 eV)than that of pure bulkα-Fe_(2)O_(3)(2.1 eV).By doping Sn intoα-Fe_(2)O_(3) NPs,the Sn-doped hematite was observed a redshift toward a long wavelength with in-creasing Sn concentration from 0%to 4.0%.The photocatalytic activity of Sn-dopedα-Fe_(2)O_(3) NPs was evaluated by Congo red(CR)dye degradation.The degradation efficiency of CR dye using Sn-α-Fe_(2)O_(3) NPs catalyst is higher than that of pureα-Fe_(2)O_(3) NPs.The highest degradation efficiency of CR dye was 97.8%using 2.5%Sn-dopedα-Fe_(2)O_(3) NPs catalyst under visible-light irradi-ation.These results suggest that the synthesized Sn-dopedα-Fe_(2)O_(3) nanoparticles might be a suitable approach to develop a photocatalytic degradation of toxic inorganic dye in wastewater. 关 键 词：α-Fe_(2)O_(3)nanoparticles Sn Congo red photocatalytic properties PHOTODEGRADATION
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