Realization of Visible Light Photocatalysis by Wide Band Gap Pure SnO₂ and Study of In₂O₃ Sensitization Porous SnO₂ Photolysis Catalyst

Abstract

SnO2 is a wide band gap semiconductor which has no photocatalysis under visible light. In this study, the disordered porous SnO2 precursor was constructed which showed obvious photocatalysis under visible light irradiation. Its degradation rate to RhB was 51.66% after 100 min, and the amount of hydrogen produced could reach 11.13 mmol⋅g−1 after 3.5 h under visible light irradiation. And then, In2O3 was used as sensitizer to increase the specific surface area of porous SnO2 matrix. The specific surface area of porous SnO2 was increased from 167.355 m2⋅g−1 to 544.394 m2⋅g−1 when the doping amount of In2O3 was 1.5 wt.%. The photocatalytic properties of the porous SnO2 matrix was also vastly increased. The highest photocatalytic activity was observed for the In2O3/SnO2‐1.5 sample, the degradation rate of RhB was 93.50% after 100 min which was 1.85 times of the SnO2 matrix, and the hydrogen production rate could reach 21.51 mmol⋅g−1 after 3.5 h which was 1.94 times of the SnO2 matrix under visible light irradiation. The catalyst had a much higher stability which could be recycled utilize.

Enhanced Photocatalytic Degradation of Rhodamine B Dye by Iron-Doped Europium Oxide Nanoparticles

“…The treatment of organic wastewater from factories and organic chemicals used in agricultural production processes is one of the major challenges in pollution control of the environment. − In recent years, photocatalytic technology based on semiconducting oxides has been utilized for degradation of various organic pollutants owing to their high efficiency, environmental friendliness, and high oxidation capacity. , Up to now, many oxide photocatalysts have been excavated, such as TiO 2 , − ZnO, − SnO 2 , − Ga 2 O 3 , − WO 3 , ,, perovskites, , etc. The degradation mechanism of photocatalysis depends on the formation of electron–hole pairs in a photocatalyst by light irradiation.…”

A novel GO hoisted SnO2–BiOBr bifunctional catalyst for the remediation of organic dyes under illumination by visible light and electrocatalytic water splitting

“…21 Yet, its wider energy gap ( E g = 3.06 eV) combined with a greater likelihood of electron–hole pair recombination limits its use in photocatalysis. 22 Tin dioxide (SnO 2 ) and bismuth oxybromide (BiOBr) have each proved their potential as photocatalysts in the degradation of organic dyes among other photocatalysts. 23 While SnO 2 possesses excellent electronic properties and relatively high electron mobility, BiOBr stands out because of its suitable band gap and stability under visible light irradiation.…”

Mace‐Shaped Cu7S4 NW/ECF Composites for Photocatalytic Degradation of Antibiotics

“…For example, Deng and Wang et al [l] prepared CuO/Cu 2 O photocatalysts of transition metal oxides by low-temperature solution synthesis; Fan et al has prepared g-C 3 N 4 /g-C 3 N 4 metal-free heterojunction; [2] Zhao et al synthesized a layered system of Zn-based SnO 2 nanosheets by a one-pot hydrothermal method; [3] Jiang et al prepared pure Ag 2 S photocatalysts, [4] all of them Shows good photocatalytic activity. Some cheap semiconductors, such as TiO 2 , [5,6] SnO 2 , [7] ZnO [8] and CeO 2 [9] are widely used, but only they can be used in the ultraviolet range, while the ultraviolet light on the earth only accounts for 6.8 %, and the near-infrared occupies most of the sunlight but it has not been effectively used. So it is necessary to develop an effective near-infrared photocatalytic material.…”

“…prepared pure Ag 2 S photocatalysts, [4] all of them Shows good photocatalytic activity. Some cheap semiconductors, such as TiO 2 , [5,6] SnO 2 , [7] ZnO [8] and CeO 2 [9] are widely used, but only they can be used in the ultraviolet range, while the ultraviolet light on the earth only accounts for 6.8 %, and the near‐infrared occupies most of the sunlight but it has not been effectively used. So it is necessary to develop an effective near‐infrared photocatalytic material [10]…”