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Oxygen-incorporated MoS_(2) catalyst for remarkable enhancing piezocatalytic H_(2) evolution and degradation of organic pollutant

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Rare Metals 2023年第9期42卷 3034-3045页

作者： Xue-Er Ning Dian-Zeng Jia Shan-Hao Li Muhammad Farooq Khan Ai-Ze Hao State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830017China Department of Electrical Engineering Sejong UniversitySeoul05006Republic of Korea

A highly efficient piezocatalyst of oxygen-incorporated Mo S_(2)(O-Mo S_(2)) was designed and successfully synthesized via facile modulation of hydrothermal process temperature ***,a superior piezocatalytic H_(2) evolution rate of 46.1μmol·g^(-1)·h^(-1)in pure water and921.0μmol·g^(-1)·h^(-1)in methanol solution is obtained on optimal O-MoS_(2)-180 (with a hydrothermal process temperature of 180℃),outperforming pristine Mo S_(2)and most of the reported other ***,piezocatalytic activity of O-MoS_(2) toward the degradation of organic pollutants depends on hydrothermal *** suitable temperature of O-Mo S_(2)-180 presents dramatically excellent piezocatalytic capacity compared with the pristine MoS_(2) for degradation of methylene blue (MB) *** reaction rate constant of O-Mo S_(2)-180 reaches to 54.6×10^(-3)min^(-1),which is nearly 18 and 4-folds in contrast with pristine MoS_(2) and O-Mo S_(2)-140 (with a hydrothermal process temperature of 140℃),***,it also manifests that O-MoS_(2)-180 endows relatively high degradation efficiency (84.6%within30 min) and excellent ***,it is also demonstrated that optimal O-MoS_(2) can dramatically promote charge carriers transport and ***,our theoretical calculation results suggest that the oxygenincorporated can modulate the surface electronic state,enhance active sites as well as optimize the hydrogen adsorption Gibbs free energy of MoS_(2),thus extremely boosting piezocatalytic ***,an innovative piezocatalytic mechanism is proposed to reveal and expound the relationship between piezocatalytic property and oxygen-incorporated role.

关键词： Oxygen-incorporated MoS_(2) piezocatalytic H_(2)evolution piezocatalytic degradation Charge carriers separation piezocatalytic mechanism

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