Bubble-Assisted Three-Dimensional Ensemble of Nanomotors for Improved Catalytic Performance

Ben Wang; Fengtong Ji; Jiangfan Yu; Lidong Yang; Qianqian Wang; Li Zhang

doi:10.1016/j.isci.2019.08.026

Bubble-Assisted Three-Dimensional Ensemble of Nanomotors for Improved Catalytic Performance

Ben Wang, Fengtong Ji, Jiangfan Yu, Lidong Yang, Qianqian Wang, Li Zhang

Research output: Journal article publication › Journal article › Academic research › peer-review

39 Citations (Scopus)

Abstract

Combining catalysts with active colloidal matter could keep catalysts from aggregating, a major problem in chemical reactions. We report a kind of ensemble of bubble-cross-linked magnetic colloidal swarming nanomotors (B-MCS) with enhanced catalytic activity because of the local increase of the nanocatalyst concentration and three-dimensional (3D) fluid convection. Compared with the two-dimensional swarming collective without bubbles, the integral rotation was boosted because of the dynamic dewetting and increased slip length caused by the continuously ejected tiny bubbles. The bubbles cross-link the nanocatalysts and form stack along the vertical axis, generating the 3D network-like B-MCS ensemble with high dynamic stability and low drag resistance. The generated B-MCS ensemble exhibits controllable locomotion performance when applying a rotating magnetic field. Benefiting from locally increased catalyst concentration, good mobility, and 3D fluidic convection, the B-MCS ensemble offers a promising approach to heterogeneous catalysis.

Original language	English
Pages (from-to)	760-771
Number of pages	12
Journal	iScience
Volume	19
DOIs	https://doi.org/10.1016/j.isci.2019.08.026
Publication status	Published - 27 Sept 2019
Externally published	Yes

Keywords

Catalysis
Chemistry
Materials Science
Nanomaterials

ASJC Scopus subject areas

General

More information

10.1016/j.isci.2019.08.026

Cite this

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title = "Bubble-Assisted Three-Dimensional Ensemble of Nanomotors for Improved Catalytic Performance",

abstract = "Combining catalysts with active colloidal matter could keep catalysts from aggregating, a major problem in chemical reactions. We report a kind of ensemble of bubble-cross-linked magnetic colloidal swarming nanomotors (B-MCS) with enhanced catalytic activity because of the local increase of the nanocatalyst concentration and three-dimensional (3D) fluid convection. Compared with the two-dimensional swarming collective without bubbles, the integral rotation was boosted because of the dynamic dewetting and increased slip length caused by the continuously ejected tiny bubbles. The bubbles cross-link the nanocatalysts and form stack along the vertical axis, generating the 3D network-like B-MCS ensemble with high dynamic stability and low drag resistance. The generated B-MCS ensemble exhibits controllable locomotion performance when applying a rotating magnetic field. Benefiting from locally increased catalyst concentration, good mobility, and 3D fluidic convection, the B-MCS ensemble offers a promising approach to heterogeneous catalysis.",

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author = "Ben Wang and Fengtong Ji and Jiangfan Yu and Lidong Yang and Qianqian Wang and Li Zhang",

note = "Funding Information: This work was partially supported by the General Research Fund (GRF) from the Research Grants Council (RGC) of Hong Kong with Project Numbers 14203715 and 14218516 , the ITF project funded by the HKSAR Innovation and Technology Commission (ITC) with Project Numbers MRP/036/18X and ITS/231/15 . The authors thank Dongdong Jin and Shijie Wang for the discussion and revision of this work. B.W. would like to thank the financial support from the Impact Postdoctoral Fellowship Scheme from the Chinese University of Hong Kong. Publisher Copyright: {\textcopyright} 2019 The Author(s)",

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doi = "10.1016/j.isci.2019.08.026",

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AU - Zhang, Li

N1 - Funding Information: This work was partially supported by the General Research Fund (GRF) from the Research Grants Council (RGC) of Hong Kong with Project Numbers 14203715 and 14218516 , the ITF project funded by the HKSAR Innovation and Technology Commission (ITC) with Project Numbers MRP/036/18X and ITS/231/15 . The authors thank Dongdong Jin and Shijie Wang for the discussion and revision of this work. B.W. would like to thank the financial support from the Impact Postdoctoral Fellowship Scheme from the Chinese University of Hong Kong. Publisher Copyright: © 2019 The Author(s)

PY - 2019/9/27

Y1 - 2019/9/27

N2 - Combining catalysts with active colloidal matter could keep catalysts from aggregating, a major problem in chemical reactions. We report a kind of ensemble of bubble-cross-linked magnetic colloidal swarming nanomotors (B-MCS) with enhanced catalytic activity because of the local increase of the nanocatalyst concentration and three-dimensional (3D) fluid convection. Compared with the two-dimensional swarming collective without bubbles, the integral rotation was boosted because of the dynamic dewetting and increased slip length caused by the continuously ejected tiny bubbles. The bubbles cross-link the nanocatalysts and form stack along the vertical axis, generating the 3D network-like B-MCS ensemble with high dynamic stability and low drag resistance. The generated B-MCS ensemble exhibits controllable locomotion performance when applying a rotating magnetic field. Benefiting from locally increased catalyst concentration, good mobility, and 3D fluidic convection, the B-MCS ensemble offers a promising approach to heterogeneous catalysis.

AB - Combining catalysts with active colloidal matter could keep catalysts from aggregating, a major problem in chemical reactions. We report a kind of ensemble of bubble-cross-linked magnetic colloidal swarming nanomotors (B-MCS) with enhanced catalytic activity because of the local increase of the nanocatalyst concentration and three-dimensional (3D) fluid convection. Compared with the two-dimensional swarming collective without bubbles, the integral rotation was boosted because of the dynamic dewetting and increased slip length caused by the continuously ejected tiny bubbles. The bubbles cross-link the nanocatalysts and form stack along the vertical axis, generating the 3D network-like B-MCS ensemble with high dynamic stability and low drag resistance. The generated B-MCS ensemble exhibits controllable locomotion performance when applying a rotating magnetic field. Benefiting from locally increased catalyst concentration, good mobility, and 3D fluidic convection, the B-MCS ensemble offers a promising approach to heterogeneous catalysis.

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Bubble-Assisted Three-Dimensional Ensemble of Nanomotors for Improved Catalytic Performance

Abstract

Keywords

ASJC Scopus subject areas

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