One-Pot Preparation and CO2 Adsorption Modeling of Porous Carbon, Metal Oxide, and Hybrid Beads

详细信息    查看全文

• 作者：Glenna L. Drisko ; Cindy Aquino ; Paul H. M. Feron ; Rachel A. Caruso ; Simon Harrisson ; Vittorio Luca
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：June 12, 2013
• 年：2013
• 卷：5
• 期：11
• 页码：5009-5014
• 全文大小：336K
• 年卷期：v.5,no.11(June 12, 2013)
• ISSN：1944-8252

文摘

Hierarchically porous carbon (C), metal oxide (ZrTi), or carbon鈥搈etal oxide (CZrTi) hybrid beads are synthesized in one pot through the in situ self-assembly of Pluronic F127, titanium and zirconium propoxides, and polyacrylonitrile (PAN). Upon contact with water, a precipitation of PAN from the liquid phase occurs concurrently with polymerization and phase separation of the inorganic precursors. The C, ZrTi, and CZrTi materials have similar morphologies but different surface chemistries. The adsorption of carbon dioxide by each material has been studied and modeled using the Langmuir鈥揊reundlich equation, generating parameters that are used to calculate the surface affinity distributions. The Langmuir, Freundlich, T贸th, and Temkin models were also applied but gave inferior fits, indicating that the adsorption occurred on an inhomogeneous surface reaching a maximum capacity as available surface sites became saturated. The carbon beads have higher surface affinity for CO₂ than the hybrid and metal oxide materials.

Keywords:

phase separation; carbon dioxide adsorption; Langmuir鈭扚reundlich equation; surface affinity; poly(acrylonitrile); metal oxide; carbon