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    Storing solar energy within Ag-Paraffin@Halloysite microspheres as a novel self-heating catalyst

    Access Status
    Fulltext not available
    Authors
    Zhao, Y.
    Kong, W.
    Jin, Z.
    Fu, Y.
    Wang, W.
    Zhang, Y.
    Liu, Jian
    Zhang, B.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhao, Y. and Kong, W. and Jin, Z. and Fu, Y. and Wang, W. and Zhang, Y. and Liu, J. et al. 2018. Storing solar energy within Ag-Paraffin@Halloysite microspheres as a novel self-heating catalyst. Applied Energy. 222: pp. 180-188.
    Source Title
    Applied Energy
    DOI
    10.1016/j.apenergy.2018.04.013
    ISSN
    0306-2619
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/71321
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Elsevier Ltd With the rapid depletion of fossil fuels and the associated environmental issues, solar energy is identified as one of the most promising pollution-free and renewable resource. Herein, we prepared a novel Ag-Paraffin@Halloysite microsphere with the integrated abilities of storing solar energy and catalytic function by self-assembly method. The results show that Ag-Paraffin@Halloysite microsphere has a core-shell structure with paraffin as core and halloysite as shell, and Ag nanoparticles are dispersed uniformly on the surface of the microspheres. The high thermal storage capability, encapsulation ratio and encapsulation efficiency of Ag-Paraffin@Halloysite indicate that it can be used as an ideal heat storage material. Compared with pure paraffin, Ag-Paraffin@Halloysite has higher thermal conductivity, excellent thermal storage capacity, and faster transient thermal response. After heat storage, Ag-Paraffin@Halloysite shows much better catalytic activity (95.3% of conversion in 6 min) compared with the one without heat storage (71.1% of conversion in 6 min) for catalytic reduction of 4-nitrophenol. This result suggests its potential to be used as a self-heating catalyst for storing/releasing thermal energy during catalytic reactions. This work may offer a general and innovative approach to couple phase change materials with catalyst and open up a new avenue for utilization of solar energy in the fields of chemistry and chemical engineering.

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