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Novel hierarchically porous allophane/diatomite nanocomposite for benzene adsorption
Liangliang Deng;  Peixin Du;  Wenbin Yu;  Peng Yuan;  Faïza Annabi-Bergaya;  Dong Liu;  Junming Zhou
2019
Source PublicationApplied Clay Science
Volume168Pages:155–163
Abstract

Allophane/diatomite (Allo/Dt) nanocomposite with a hierarchically porous structure was prepared via an in situ hydrothermal method. This hierarchically porous structure consists of i) micropores remaining from the initial stacked coating allophane particles; ii) mesopores formed by the transformation of the macropores of diatom frustules due to the filling of allophane particles in the inner walls, and iii) preserved macropores of diatom frustules. The coating amount of allophane particles in Allo/Dt nanocomposite was 59.1%, leading to a specific surface area of 155.9 m2 /g, which was substantially higher than that of diatomite (17.9 m2 /g). The benzene adsorption performance and related adsorption mechanisms of Allo/Dt nanocomposite were investigated. The larger benzene dynamic adsorption capacity of 121.6 mg/g, compared to that of the synthetic allophane (105.9 mg/g), resulted from the adequate adsorption space provided by the hierarchically porous structure. Moreover, Allo/Dt nanocomposite displayed a higher efficiency for benzene adsorption in mesopores of the coating allophane particles because of their improved dispersity. These results demonstrated that the fabrication process of Allo/Dt nanocomposite can overcome not only the aggregation of allophane but also diatomite's shortcoming of low specific surface area, making the nanocomposite to be a promising adsorbent for the treatment of volatile organic compounds.

KeywordAllophane/diatomite Nanocomposite allophane diatomite hierarchically Porous Structure benzene Adsorption
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10540
Collection矿床地球化学国家重点实验室
Affiliation1.CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2.University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
3.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, China
4.CNRS, UMR7374, Interface Confinement Matériaux et Nanostructures, 45071 Orléans, France
Recommended Citation
GB/T 7714
Liangliang Deng;Peixin Du;Wenbin Yu;Peng Yuan;Faïza Annabi-Bergaya;Dong Liu;Junming Zhou. Novel hierarchically porous allophane/diatomite nanocomposite for benzene adsorption[J]. Applied Clay Science,2019,168:155–163.
APA Liangliang Deng;Peixin Du;Wenbin Yu;Peng Yuan;Faïza Annabi-Bergaya;Dong Liu;Junming Zhou.(2019).Novel hierarchically porous allophane/diatomite nanocomposite for benzene adsorption.Applied Clay Science,168,155–163.
MLA Liangliang Deng;Peixin Du;Wenbin Yu;Peng Yuan;Faïza Annabi-Bergaya;Dong Liu;Junming Zhou."Novel hierarchically porous allophane/diatomite nanocomposite for benzene adsorption".Applied Clay Science 168(2019):155–163.
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