Mesoporous Chitosan-SiO2 Nanoparticles: Synthesis, Characterization, and CO2 Adsorption Capacity

被引：122

作者：

Rafigh, Sayyid Mandi ^{[1
]}

Heydarinasab, Amir ^{[1
]}

机构：

[1] Islamic Azad Univ, Sci & Res Branch, Dept Chem Engn, Tehran, Iran

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2017年 / 5卷 / 11期

关键词：

Chitosan-SiO2 nanoparticles (NPs); CO2; adsorption; Mesoporous; CAPTURE; CHITIN; ADSORBENTS;

D O I：

10.1021/acssuschemeng.7b02388

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mesoporous chitosan-SiO2 nanoparticles (NPs) were successfully synthesized. The prepared nanoparticles were characterized using TEM, FTIR, XRD, TGA, EDX, and (CHN) elemental analysis. From TEM micrograph, chitosan-SiO2 NPs were sphere-like, pretty uniformly distributed with coarse surface. The average size of chitosan-SiO2 NPs was determined as 211 nm with DLS, which was confirmed by TEM. The mesoporous structure of chitosan-SiO2 NPs was characterized with N-2 adsorption/desorption measurements. BET surface area was 621 m(2) g(-1) and the total pore volume was 0.71 m(3) g(-1)CO(2) adsorption was evaluated by a volumetric method. Chitosan-SiO2 NPs showed a maximum CO2 adsorption capacity of 4.39 mmol g(-1) at 25 degrees C and a high selective separation capacity for CO2 over N-2 (S-CO2/N2 = 15.46). The influence of amines on carbon dioxide adsorption was discussed. Stable CO2 adsorption/desorption was confirmed after six cycles of experiments. Therefore, chitosan-SiO2 NPs exhibit great potential for CO2 capture.

引用

页码：10379 / 10386

页数：8

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