期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 2, 期 10, 页码 2435-2441出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc500447j
关键词
Hydrothermal carbonization; Air activation; High mesopore ratio; Large surface area; CO2 adsorption; Dye adsorption
资金
- National Natural Science Foundation of China [21376208, U1162124]
- Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars of China [R13B030002]
- Specialized Research Fund for the Doctoral Program of Higher Education [J20130060]
- Fundamental Research Funds for the Central Universities
- Program for Zhejiang Leading Team of ST Innovation
- Zhejiang University
- Max Planck Society
Hydrothermal carbonization of biomass is regarded as the most sustainable technique to fabricate functional carbonaceous materials. The absence of nanoporous structures in the as-obtained materials remains a stumbling block to their wide applications. A hard-templating method and KOH activation are mostly frequently applied to introduce porous structures into HTC materials, but they always suffer from either tedious synthetic processes or massive use of a strong base. Here, the hierarchically porous structure was developed by heat treatment in the static air atmosphere. The textual properties were investigated by TEM and N-2 sorption analyses. The structural order and surface chemistry were characterized by XRD, Raman, and XPS. The results show that the activated HTC carbons are rich in micropores and mesopores with high surface areas up to 1704 m(2)/g. The mesopore volume would reach over 50% of the total pore volume. In addition, these carbons show high performance in CO2 and dye adsorption.
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