journal article·2022-04-26

Single-Hole Hollow Carbon Nanospheres via a Poly(ethylene glycol)-Assisted Emulsion-Templating Strategy for Intensified Liquid-Phase Adsorption

Qun Yu, De-chang Li, Zhengbin Tian, Chongzhi Zhu, Chengli Jiao, Qian Zhang, Yanping Chen, Yihan Zhu, Heqing Jiang, Jian Liu, Guang-Hui Wang

Chemistry of Materials· Volume 34· Issue 8
Publisher page

Abstract

Single-hole hollow carbon nanospheres (HCH) possess unique properties that combine the advantages of a hollow cavity and an opening hole in the shell, making them very attractive in various applications. However, it is still a challenge to synthesize HCH via a facile and scalable route. Herein, we develop a poly(ethylene glycol) (PEG)-assisted emulsion-templating method to synthesize HCH, involving only a hydrothermal process and pyrolysis. In the emulsion system, the PEG molecules can be used as a reverse demulsifier to induce the formation of hollow structures with a closed shell (HCS, PEG-1000), a single hole in the shell (HCH, PEG-2000), and a bowl-like shell (HCB, PEG-4000). It is found that HCH exhibits higher adsorption capacities (2–4 times higher than those of HCS) and faster adsorption rates toward large molecules (e.g., Congo red), indicating the intensification of liquid-phase adsorption induced by the single-hole hollow structure, which can promote mass transfer and simultaneously enhance the adsorption capacity.
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Research context

OpenAlex topics: Graphene research and applications · Covalent Organic Framework Applications · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China

University of Chinese Academy of Sciences, Beijing 100049, China

Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Dalian National Laboratory for Clean Energy, Dalian 116023, China

Funding

National Natural Science Foundation of China · Chinese Academy of Sciences · Natural Science Foundation of Zhejiang Province · Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences

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