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Vertically aligned γ-AlOOH nanosheets on Al foils as flexible and reusable substrates for NH3 adsorption

journal contribution
posted on 01.08.2018, 00:00 authored by C Yang, Ying (Ian) ChenYing (Ian) Chen, Dan LiuDan Liu, Jinfeng Wang, Cheng Chen, Jiemin Wang, Ye Fan, S Huang, Weiwei LeiWeiwei Lei
Vertically aligned γ-AlOOH nanosheets (NSs) have been successfully fabricated on flexible Al foils via a solvothermal route without morphology-directing agents. Three different reaction temperature (25, 80, and 120 ◦C) and time (30 min, 45 min, and 24 h) are discussed for the growth period, which efficiently tune the density and size of the γ-AlOOH NSs. Meanwhile, the growth speed of the nanosheets confirms that dominant growth stage is seen in the initial 45 min. Furthermore, the interlayer of the γ-AlOOH NSs displays an average height of 140 nm and superhydrophilicity. By dynamic adsorption, the assynthesized γ-AlOOH NSs exhibit an outstanding NH3adsorption capacity of up to 146 mg/g and stably excellent regeneration for 5 cycles. The mechanism of NH3adsorption on the in-plane of the γ-AlOOH NSs is explained by the Lewis acid/base theory. The H-bond interactions among the NH3molecules and the edge groups (-OH) further improve the capture ability of the nanosheets.

History

Journal

Frontiers of physics

Volume

13

Issue

4

Article number

138101

Pagination

138101-1 - 138101-6

Publisher

Springer

Location

Berlin, Germany

ISSN

2095-0462

eISSN

2095-0470

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2018, Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature