摘要
Due to the ever-tightening regulation on mercury emission in recent decades,there is an urgent need to develop novel materials for the removal of elemental mercury at coal-fired power plants.In this study,a series of MoS_(2) quantum dots(QDs)-based MoS_(2)/HKUST-1 composite materials were prepared.It is found that MoS_(2)QDs were encapsulated by HKUST-1and enhanced the crystallinity and specific surface area of HKUST-1.The MoS_(2)/HKUST-1 showed excellent performance in catalytic oxidation of Hg~0as compared with pristine HKUST-1.It is found that surface layer of lattice oxygens is active and participates in Hg^(0) oxidation,while the consumption of surface oxygens then leads to the formation of oxygen vacancies on the surface.These vacancies are effective in the adsorption and dissociation of O_(2),which subsequently participates in the oxidation of Hg^(0).Moreover,the study on the influence of commonly seen gas components,such as SO_(2),NO,NH_(3) and H_(2)O,etc.,on Hg^(0) oxidation demonstrated that synergistic effects exist among these gas species.It is found that the presence of NO promotes the oxidation of Hg^(0) using oxygen as the oxidant.
基金
National Key R&D Program of China(No.2017YFB0603202)is acknowledged for sponsored this research
The Zhejiang Provincial Department of Science and Technology is acknowledged for this research under its Provincial Key Laboratory Programme(No.2020E10018)
Ningbo‘Science and Technology Innovation 2025’Major Projects(Nos.2018B10091 and 2018B10027)。
