Confinement of Fe atoms between MoS2 interlayers drives phase transition for improved reactivity in Fenton-like reactions

被引:5
|
作者
Sun, Yibing [1 ]
Zhou, Yu [2 ,3 ]
Li, Hongchao [1 ]
Wang, Chuan [1 ]
Zhang, Xuan [1 ]
Ma, Qian [4 ]
Cheng, Yingchun [2 ,3 ]
Qian, Jieshu [1 ,5 ]
Pan, Bingcai [5 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Jiangsu Key Lab Chem Pollut Control & Resources Re, Nanjing 210094, Peoples R China
[2] Nanjing Tech Univ, Key Lab Flexible Elect, Nanjing 211816, Peoples R China
[3] Nanjing Tech Univ, Inst Adv Mat, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Nanjing 211816, Peoples R China
[4] Nanjing Med Univ, Affiliated Stomatol Hosp, Dept Gen Dent, Jiangsu Prov Key Lab Oral Dis, Nanjing 210029, Peoples R China
[5] Nanjing Univ, Res Ctr Environm Nanotechnol ReCENT, Sch Environm, State Key Lab Pollut Control & Resources Reuse, Nanjing 210023, Peoples R China
基金
中国国家自然科学基金;
关键词
confinement; MoS2; Fe atoms; Fenton-like reactions; hydrogen evolution reaction; HIGHLY EFFICIENT; FREE-RADICALS; OXIDATION; PEROXYMONOSULFATE; DEGRADATION; ACTIVATION; EVOLUTION; SITES; H2O2;
D O I
10.1007/s12274-023-5938-x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Phase manipulation of MoS2 from thermodynamically stable 2H phase to the unstable but more reactive 1T phase represents a crucial strategy for improving the reactivity in many reactions. The widely adopted wet chemistry approach uses intercalating entities especially alkali metal ions to achieve the phase transition; however, these entities are normally inert for the target reaction. Here, we describe the first use of iron atoms for the intercalation of 2H-MoS2 layers, driving the partial transition from 2H to 1T phase. Interestingly, in the peroxymonosulfate (PMS)-based Fenton-like reactions, the interlayered confinement of Fe atoms not only activates the inert basal plane, but also adds more reactive Fe sites for the formation of metal-PMS complex as primary reactive species for pollutant removal. In the degradation of a model pollutant carbamazepine (CBZ), the Fe-intercalated MoS2 exhibits a first order rate constant 13.3 times higher than 2H-MoS2. This strategy is a new direction for manipulating the phase composition and boosting the catalytic reactivity of MoS2-based catalysts in various scenarios, including environmental remediation and energy applications.
引用
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页码:1132 / 1139
页数:8
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