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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents

ID: 457059.0, Fritz-Haber-Institut / Inorganic Chemistry
Synthesis, Characterization, and Catalytic Application of Highly Ordered Mesoporous Alumina-Carbon Nanocomposites
Authors:Xu, Jinming; Wang, Aiqin; Wang, Xiaodong; Su, Dang Sheng; Zhang, Tao
Research Context:Carbon
Date of Publication (YYYY-MM-DD):2011
Title of Journal:Nano Research
Issue / Number:1
Start Page:50
End Page:60
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Highly ordered mesoporous carbon-alumina nanocomposites (OMCA) have been for the first time synthesized by multi-component co-assembly method followed by pyrolysis at a high temperature. In this synthesis, resol and aluminum sol were respectively used as the carbon and alumina precursors and triblock copolymer F127 as the template. N2-adsorption, X-ray diffraction, and transmission electron microscopy revealed that, with an increase of the alumina content in the nanocomposite from 11 to 48 wt %, the pore size increased from 2.9 to 5.0 nm while the ordered mesoporous structure remained well. Further increasing the alumina content to 53 wt % resulted in wormhole-like structure although the pore size distribution was still narrow. The nanocomposite walls are composed of continuous carbons and amorphous aluminas, which allows the ordered mesostructure preserved well even after the removal of aluminas by HF etching or removal of carbons by calcinations in air. The OMCA nanocomposites exhibited good thermostability until 1000 ºC, above which the ordered mesostructure partially collapsed associated with the phase transformation from the amorphous alumina into γ-Al2O3. The OMCA-supporting Pt catalysts exhibited excellent performances in one-pot transformation of cellulose into hexitols thanks to the unique surface properties of the nanocomposite.
Free Keywords:nanocomposite; mesoporous; alumina; carbon; cellulose
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Micro- and Nanostructure / Carbon
External Affiliations:State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023, P. R. China,
Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Identifiers:URL:http://dx.doi.org/10.1007/s12274-010-0038-0 [only subscriber]
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