Synthesis, Characterization and Performance Evaluation of TiO2-SnO2 photocatalyst for Removal of Toxic Hexavalent Chromium

Rathna, Thara; PonnanEttiyappan, JagadeeshBabu; Sudhakar, D. Ruben

doi:10.1007/s11270-022-05718-2

Cited by 3 publications

(1 citation statement)

References 28 publications

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“… The TiO 2 /SnO 2 composites synthesized by Monica using laser pyrolysis are all 8–22 nm in size and have lower bandgap energy . In addition, TiO 2 /SnO 2 composites are also used in photocatalytic degradation of heavy metals, organic pollutants, and solar cells . However, the study of TiO 2 /SnO 2 catalysts for the photocatalytic degradation of VOCs has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of VOC Waste Gas in Petrochemical Sewage Fields

Duan

Qian

et al. 2022

Ind. Eng. Chem. Res.

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The large amount of waste gas containing volatile organic compounds (VOCs) discharged from petrochemical sewage plants will cause air pollution and seriously endanger the safety of human beings and the ecological environment. In this paper, we proposed a photocatalytic oxidation degradation technique of VOCs and designed a photocatalytic reaction device loaded with TiO 2 / SnO 2 catalyst. Under UV light irradiation, there is an energy level difference in the conduction band between TiO 2 and SnO 2 , which makes the photogenerated electrons (e − ) migrate to SnO 2 and reduces the surface electron density of TiO 2 . Thus, the recombination of photogenerated electron−hole pairs (e − −h + ) is inhibited and the catalyst activity is improved. Meanwhile, the synergistic effect of the oxidation of hydroxyl radicals (•OH) and ozone greatly improves the conversion rate. In addition, in the industrial side line, by studying the influence of inlet gas volume, inlet gas concentration, and gas humidity (RH) on the conversion rate of the VOCs, we revealed the operation law of the photocatalytic technique in industrial applications. Under the best working conditions, the purification rate of the VOCs was as high as 92.73%. This technique can not only effectively avoid the damage to the environment caused by polluting VOCs but also promote the low-carbon and green development of enterprises in the industry.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of VOC Waste Gas in Petrochemical Sewage Fields

Duan

Qian

et al. 2022

Ind. Eng. Chem. Res.

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Metal organic framework anchored onto biowaste mediated carbon material (rGO) for remediation of chromium (VI) by the photocatalytic process

Sathish,

Kumar.K,

et al. 2024

Chemosphere

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Photocatalytic removal of synthetic dyes using Bi2O3–TiO2 nanocomposites obtained by simple hydrothermal route

Ruiz-Santoyo,

García-Carvajal,

Arenas-Arrocena

2024

Preprint

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The current study reports the preparation of TiO₂-modified Bi₂O₃ photocatalysts with different TiO₂ contents, synthesized via an in-situ hydrothermal method. The powder samples were characterized by XRD, SEM, TEM, FTIR–ATR, UV-vis, XPS, and N₂ physisorption analysis. The photocatalytic activity of the TiO2-modified Bi2O3 was studied for the removal of methyl orange (MO) and methylene blue (MB) under different reaction conditions. Our study showed that the TiO2-modified Bi2O3 photocatalysts exhibited superior photocatalytic activity compared to the pristine samples of TiO2 and Bi2O3. The BiT16 sample achieved degradation rates of approximately 93.9% and 98.2% for MO and MB, respectively, within 120 minutes of reaction at 30 ppm. These results are closely related to the band gap values, differences in textural features, TiO2 content, and the reduction in the recombination process of e⁻/h⁺ pairs in the Bi2O3–TiO2 composites. Reaction kinetics were determined using the Langmuir–Hinshelwood mechanism, and during the third photoreaction cycle, the TiO2-modified Bi2O3 (BiT16) achieved photocatalytic degradation rates of 65.6% for MO and 70.5% for MB.

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Synthesis, Characterization and Performance Evaluation of TiO2-SnO2 photocatalyst for Removal of Toxic Hexavalent Chromium

Cited by 3 publications

References 28 publications

Photocatalytic Degradation of VOC Waste Gas in Petrochemical Sewage Fields

Photocatalytic Degradation of VOC Waste Gas in Petrochemical Sewage Fields

Metal organic framework anchored onto biowaste mediated carbon material (rGO) for remediation of chromium (VI) by the photocatalytic process

Photocatalytic removal of synthetic dyes using Bi2O3–TiO2 nanocomposites obtained by simple hydrothermal route

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