V‐/O‐Doping to Endow Ag₂S‐based Bimetal Oxysulfide with Sulfur Vacancies and Heterovalent States for Rapid Reduction of Organic and Cr(VI) Pollutants in the Dark

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract A novel AgVOS oxysulfide catalyst for rapid catalytic reduction of toxic organic substances and Cr(VI) under dark is synthesized by a facile method. With the V/O co‐doping, doped Ag 2 S has effectively regulated electron transfer performance, hydrazine‐driven V 5+ ‐to‐V 4+ to disturb charge equilibrium, formed sulfur vacancy balanced oxygen doping maintain equilibrium. The acts as active site electrophilic nucleophilic reaction, while orbital hybridization O 2p 3p stabilizes valence state 2− . suitable ratio n (V /V ) during synthesis facilitate enhance reaction. co‐doped AgVOS‐3 prepared hydrazine content exhibits super performance 4‐NP (4‐nitrophenol), MB (methyl blue), MO orange), RhB (Rhodamine B, 20 ppm, 100 mL) dyes, which are completely reduced within 8, 10, 8 min, respectively. In comparison, Cr 6+ (50 also 6 min AgVOS‐3, indicating its good activity inorganic mixture pollutants. Furthermore, stability after cyclic tests efficiency 96.5%. Therefore, shows promising application industrial wastewater treatment.

Language: Английский

Lignin-supported (Bi,Ti)2(O,S)3 bimetal oxysulfide catalysts for efficient catalytic reduction of organic dyes and Cr(VI) in the dark

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: unknown, P. 100770 - 100770

Published: Sept. 1, 2024

Language: Английский

Heterovalent State and Oxygen Vacancy Defect Structure‐Associated V/S Co‐Doped SnO₂ for Catalytic Reduction of Organic and Cr⁶⁺ Pollutants in the Dark

Advanced Sustainable Systems, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Abstract V/S co‐doped SnO 2 bimetal sulfur‐oxides catalysts labeled as (Sn,V) 1‐ x (S,O) 2‐ y or (SnVSO) with heterovalent state and oxygen vacancy defect are prepared via a green facile method. The presence of SnVSO in the states Sn 4+ /Sn 2+ V 5+ /V facilitates rapid transfer electrons. It improves electronic charge lifetime, accelerating efficiency catalytic reduction pollutants. regulates bandgap energy structure. hydrazine adjusts metal to reduce . Also, it introduces vacancies maintain equilibrium increase active surface reactive sites, which enhance activity. SnVSO‐3 0.4 mL exhibits excellent activity, wholly reduces 20 ppm 100 methyl orange (MO), rhodamine B (RhB), methylene blue (MB), hexavalent chromium (Cr 6+ ), 4‐nitrophenol (4‐NP) within 6 min. In addition, also has good stability after repeated runs 96.8%. Therefore, sulfur oxide have promising potential for reducing Cr organic

Language: Английский