Journal of Semiconductors, Volume. 43, Issue 12, 122001(2022)
One-step hydrothermal synthesis of Sn-dopedα-Fe2O3 nanoparticles for enhanced photocatalytic degradation of Congo red
Figures & Tables(8)
Fig. 1. (Color online) (a) XRD pattern ofα-Fe2O3 NPs samples. (b) Magnification of (104) planevs. Sn concentration. (c) 2θ position of (104) planevs. Sn concentration plot for changing Sn concentration.
Fig. 2. SEM top–view images ofα-Fe2O3 NPs with varied Sn concentrations as 0% Sn (S1), 1.0% Sn (S2), 2.5% Sn (S3) and 4.0% Sn (S4) samples.
Fig. 3. (Color online) (a) TEM image and average diameter size, (b) EDS spectrum and (c) FTIR spectrum of the pureα-Fe2O3 NPs (S1) and 2.5% Sn-α-Fe2O3 NPs (S3) samples and (d) Raman spectrum of S1–S4 samples.
Fig. 4. (Color online) (a) The absorption spectra ofα-Fe2O3 NPs for varying Sn concentration (0%, 1.0%, 2.5% and 4.0%), and (αhν)2vs. energy plot for calculation of bandgap of different Sn–doping concentrationsα-Fe2O3 NPs for (b) 0% Sn (S1), (c) 1.0% Sn (S2), (d) 2.5% Sn (S3), (e) 4.0% Sn (S4) samples, respectively.
Fig. 5. (Color online) UV–Vis absorption spectra of Congo red during different stage (at 15, and 30 min interval) of photocatalytic reaction ofα-Fe2O3 NPs with varied Sn doping concentration as (a) 0% Sn (S1), (b) 1.0% Sn (S2), (c) 2.5% Sn (S3) and (d) 4.0% Sn (S4) samples.
Fig. 6. (Color online) (a) Effect of Sn-α-Fe2O3 NPs catalyst dosage on photodegradation efficiency of CR dye solution. (b) Plot of ln (Co/C) as a function of irradiation time for photocatalysis of Congo red solution containing:α-Fe2O3 and Sn-dopedα-Fe2O3 NPs.
Table 0. The parameters of Sn doped toα-Fe2O3 nanoparticles and their degradation characteristics.
View tableView in ArticleTable 0. The parameters of Sn doped toα-Fe2O3 nanoparticles and their degradation characteristics.
Sample Sn concentration (%) Average crystallite size (nm) BET surface area (m2/g) Eg (eV) Unit cell parameter (Å) Congo red (mg/L) Degradation efficiency (%) a c Sn-α-Fe2O3−S1 0.0 20.35 26.4656 2.57 5.0237 13.6904 10 84.6 Sn-α-Fe2O3−S2 1.0 19.82 27.0181 2.48 5.0271 13.7046 10 69.2 Sn-α-Fe2O3−S3 2.5 15.89 31.1234 2.46 5.0237 13.7346 10 97.8 Sn-α-Fe2O3−S4 4.0 21.74 25.9516 2.40 5.0351 13.7411 10 81.8
Table 0. Compression of photocatalyst characteristics ofα-Fe2O3 and other materials to varying organic dyes.
View tableView in ArticleTable 0. Compression of photocatalyst characteristics ofα-Fe2O3 and other materials to varying organic dyes.
Photocatalyst Particle size (nm) Dyes Dopant concentration (%) Weight catalyst (mg) Irradiation time (min) Degradation efficiency (%) Ref. Sn/α-Fe2O3 nanoparticles 41.4 Congo red 2.5 30 120 97.8 This work Sn/α-Fe2O3 nanoparticles 12 Methylene blue 5.0 50 90 94.7 [ 10 ]α-Fe2O3/ASCM nanoparticles 50 95 400 100 100 [ 6 ]3,5 diacrylamidobenzoic acid based resin − Congo red − 280 1440 92.03 [ 8 ]Ni1–xMxFe2O3 nanosheets 20–24 Congo red 10 10 300 97 [ 49 ]2, 2’-bpy/α-Fe2O3-S nanorods 80, 300 Bisphenol A − 50 360 95.2 [ 12 ]Ni/α-Fe2O3 nanoparticles 35 Rose bengal 4.0 50 90 80.0 [ 13 ]γ-Fe2O3 nanoparticles 35 Methylene blue − 25 40 98.9 [ 10 ]α–Fe2O3 nanoparticles 27 Rose bengal − 15 135 98.0 [ 30 ]
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Van Nang Lam, Thi Bich Vu, Quang Dat Do, Thi Thanh Xuan Le, Tien Dai Nguyen, T.-Thanh-Bao Nguyen, Hoang Tung Do, Thi Tu Oanh Nguyen. One-step hydrothermal synthesis of Sn-dopedα-Fe2O3 nanoparticles for enhanced photocatalytic degradation of Congo red[J]. Journal of Semiconductors, 2022, 43(12): 122001
Paper Information
Category: Articles
Received: Jun. 6, 2022
Accepted: --
Published Online: Dec. 27, 2022
The Author Email: Lam Van Nang (lvnang@hluv.edu.vn), Nguyen Tien Dai (nguyentiendai@duytan.edu.vn)
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