One-step hydrothermal synthesis of Sn-doped α-Fe2O3 nanoparticles for enhanced photocatalytic degradation of Congo red

被引：4
|
作者：
Lam, Van Nang [1 ]
Vu, Thi Bich [2 ,3 ]
Do, Quang Dat [1 ]
Le, Thi Thanh Xuan [1 ]
Nguyen, Tien Dai [2 ,3 ]
Nguyen, T. -Thanh-Bao [4 ]
Do, Hoang Tung [4 ]
Nguyen, Thi Tu Oanh [5 ]
机构：
[1] Hoa Lu Univ, Dept Nat Sci, Ninh Binh, Vietnam
[2] Duy Tan Univ, Inst Theoret & Appl Res, Hanoi 100000, Vietnam
[3] Duy Tan Univ, Fac Nat Sci, Da Nang 550000, Vietnam
[4] Vietnam Acad Sci & Technol, Inst Phys, 10 Dao Tan, Hanoi, Vietnam
[5] Vietnam Acad Sci & Technol, Inst Mat Sci, 18 Hoang Quoc Viet, Hanoi, Vietnam
来源：
JOURNAL OF SEMICONDUCTORS | 2022年 / 43卷 / 12期
关键词：
alpha-Fe2O3; nanoparticles; Sn; Congo red; photocatalytic properties; photodegradation; HEMATITE NANOSTRUCTURES; THIN-FILMS; FE2O3; PHOTOANODES; PERFORMANCE; CATALYST; NANOTUBE; SILICON; FACILE; SHAPE;
D O I：
10.1088/1674-4926/43/12/122001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on the synthesis of Sn-doped hematite nanoparticles (Sn-alpha-Fe2O3 NPs) by the hydrothermal method. The prepared Sn-alpha-Fe2O3 NPs had a highly pure and well crystalline rhombohedral phase with an average particle size of 41.4 nm. The optical properties of as-synthesized alpha-Fe2O3 NPs show a higher bandgap energy (2.40-2.57 eV) than that of pure bulk alpha-Fe2O3 (2.1 eV). By doping Sn into alpha-Fe2O3 NPs, the Sn-doped hematite was observed a redshift toward a long wavelength with increasing Sn concentration from 0% to 4.0%. The photocatalytic activity of Sn-doped alpha-Fe2O3 NPs was evaluated by Congo red (CR) dye degradation. The degradation efficiency of CR dye using Sn-alpha-Fe2O3 NPs catalyst is higher than that of pure alpha-Fe2O3 NPs. The highest degradation efficiency of CR dye was 97.8% using 2.5% Sn-doped alpha-Fe2O3 NPs catalyst under visible-light irradiation. These results suggest that the synthesized Sn-doped alpha-Fe2O3 nanoparticles might be a suitable approach to develop a photocatalytic degradation of toxic inorganic dye in wastewater.
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页数：10
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