Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO2 capture

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

1 Scopus Citations
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Author(s)

  • Aamir Hanif
  • Yuanmeng Tian
  • Alex C.K. Yip
  • Yong Sik Ok
  • Iris K.M. Yu
  • Daniel C.W. Tsang
  • Qinfen Gu

Detail(s)

Original languageEnglish
Pages (from-to)365-371
Journal / PublicationJournal of Hazardous Materials
Volume374
Early online date15 Apr 2019
Publication statusPublished - 15 Jul 2019

Abstract

CO2 capture is projected as one of the pragmatic approaches to deal with the global warming phenomenon. Adsorption-based CO2 capture is considered an economically attractive option to reduce CO2 emission. The success of the adsorption-based capture primarily relies on adsorbents and thus a variety of adsorbents have been investigated in the literature. We here report a high surface area (210.2 m2/g) exfoliated Ni-Al LDH nanoplatelet as a promising candidate for CO2 capture at an intermediate temperature of 200 °C applicable to integrated gasification combined cycle (IGCC) and sorption enhanced water gas shift (SEWGS) reactions. The materials were well characterized by PXRD, TGA, FTIR, TEM, ICP-OES, and N2 adsorption surface area, and pore size distribution techniques. A unique nanoflower morphology comprising of exfoliated LDH platelets of ca. 5 layer thickness was obtained. The CO2 capture capacity (0.66 mmol/g) of the exfoliated Ni-Al LDH nanoplatelet is comparable to that of the widely reported Mg-Al LDH-derived mixed oxides and MgO-based adsorbents. Provided that Ni-Al and other transition metal LDH materials are known to exhibit superior catalytic properties for CO2 methanation, this work could pave the way for development of dual-functional materials for CO2 capture and conversion.

Research Area(s)

  • CO2 capture, Exfoliation, Nanosheets, Ni-Al LDH

Citation Format(s)

Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO2 capture. / Hanif, Aamir; Sun, Mingzhe; Shang, Shanshan; Tian, Yuanmeng; Yip, Alex C.K.; Ok, Yong Sik; Yu, Iris K.M.; Tsang, Daniel C.W.; Gu, Qinfen; Shang, Jin.

In: Journal of Hazardous Materials, Vol. 374, 15.07.2019, p. 365-371.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review