A New Type of Efficient CO2 Adsorbent with Improved Thermal Stability: Self‐Assembled Nanohybrids with Optimized Microporosity and Gas Adsorption Functions. (8th April 2013)

• Record Type: Journal Article
• Authors: Kim, Tae Woo; Kim, In Young; Jung, Tae Sung; Ko, Chang Hyun; Hwang, Seong‐Ju
• Is Part Of: Advanced functional materials. Volume 23:Number 35(2013)
• Page Start: 4377
• Page End: 4385
• Publication Date: 2013-04-08
• Subjects: Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201300071
• Languages: English
• ISSNs: 1616-301X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new type of efficient CO<sub>2</sub> absorbent with improved thermal stability is synthesized via self‐assembly between 2D inorganic nanosheets and two kinds of 0D inorganic nanoclusters. In these self‐assembled nanohybrids, the nanoclusters of CdO and Cr<sub>2</sub>O<sub>3</sub> are commonly interstratified with layered titanate nanosheets, leading to the formation of highly microporous pillared structure with increased basicity of pore wall. The co‐pillaring of basic CdO with Cr<sub>2</sub>O<sub>3</sub> is fairly effective at increasing a proportion of micropores and reactivity for CO<sub>2</sub> molecules and at improving the thermal stability of the resulting porous structure. Of prime importance is that the present inorganic‐pillared nanohybrids show highly efficient CO<sub>2</sub> adsorption capacity, which is much superior to those of many other absorbents and compatible to those of CO<sub>2</sub> adsorbing metal−organic framework (MOF) compounds. Taking into account an excellent thermal stability of the present nanohybrids, these materials are very promising CO<sub>2</sub> adsorbents usable at elevated temperature. This is the first example of efficient CO<sub>2</sub> adsorbent from pillared materials. The co‐pillaring of basic metal oxide nanoclusters employed in this study can provide a very powerful way of developing thermally stable CO<sub>2</sub> adsorbents from many known pillared systems.</p> </abstract>