Preparation of double-yolk egg-like nanoreactor: Enhanced catalytic activity in Fenton-like reaction and insight on confinement effect

Tingting Zhao; Yang Yang; Xianhe Deng; Shouchun Ma; Maoquan Wu; Yanqiu Zhang; Yina Guan; Yufeng Zhu; Tongjie Yao; Qingfeng Yang; Jie Wu

doi:10.1016/j.jcis.2022.06.065

Preparation of double-yolk egg-like nanoreactor: Enhanced catalytic activity in Fenton-like reaction and insight on confinement effect

J Colloid Interface Sci. 2022 Nov:625:774-784. doi: 10.1016/j.jcis.2022.06.065. Epub 2022 Jun 23.

Authors

Tingting Zhao¹, Yang Yang², Xianhe Deng¹, Shouchun Ma², Maoquan Wu², Yanqiu Zhang¹, Yina Guan¹, Yufeng Zhu², Tongjie Yao³, Qingfeng Yang⁴, Jie Wu⁵

Affiliations

¹ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China.
² State Key Lab Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China.
³ State Key Lab Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China. Electronic address: yaotj@hit.edu.cn.
⁴ State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: yangqf@nxu.edu.cn.
⁵ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China. Electronic address: wujie@hlju.edu.cn.

PMID: 35777092
DOI: 10.1016/j.jcis.2022.06.065

Abstract

Peroxymonosulfate (PMS)-based Fenton-like reaction is an effective technique for the pollutant degradation, and the Co-based metal organic frameworks displayed the excellent activity for the PMS activation. Nevertheless, how to further improve the catalytic activity, suppress the leaching of toxic cobalt ions, and realize the rapid separation were still challenges for practical application. In this work, a novel solution was proposed: encapsulating Fe₃O₄ and Prussian blue analogue (PBA) into the polypyrrole (PPy) shell and constructing a "double-yolk egg-like" Fe₃O₄/PBA@PPy as a nanoreactor. In Fe₃O₄/PBA@PPy-10, the catalytic performance was remarkably enhanced with the help of confinement effect, and the degradation rate (0.38 L·min·mol^-1) was 5.1 times than that of reference Fe₃O₄/PBA-10 (0.074 L·min·mol^-1). In addition, the concentration of leached cobalt ions was reduced to only 0.174 mg/L by the protective function from the PPy shell. Moreover, the nanoreactor could be magnetically separated from the reaction solution due to the encapsulation of Fe₃O₄ nanospheres, and 84.5% of activity still preserved after the 4th cycle. The main active species involved in Fe₃O₄/PBA@PPy-10 system was ¹O₂, while that in reference Fe₃O₄/PBA-10 system was OH. Electron spin resonance analysis and radical trapping experiment revealed that the different catalytic mechanisms were attributed to the confinement effect inside the hollow cavity. This work not only presents a feasible way to prepare rarely-reported double-yolk egg-like nanoreactor, but also provides a new insight to solve the bottlenecks in Fenton-like reaction.

Keywords: Confinement effect; Fenton-like reaction; Peroxymonosulfate; Prussian blue analogues; Yolk@shell.

MeSH terms

Catalysis
Cobalt
Nanotechnology
Polymers*
Pyrroles*

Substances

Polymers
Pyrroles
Cobalt