期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 11, 页码 5936-5944出版社
AMER CHEMICAL SOC
DOI: 10.1021/am301577c
关键词
activated carbon; glutaraldehyde cross-linked poly(vinyl alcohol); PVA/AC composites; textural characteristics; adsorption
资金
- European Commission [230790, 218242]
A set of glutaraldehyde (GA) cross-linked poly(vinyl alcohol)/activated carbon (PVA/GA/AC) composites prepared in the form of monolithic rods using a cryogelation technique and studied using adsorption, mercury porosimetry, scanning electron microscopy (SEM), and quantum chemistry methods display porosity similar to that of PVA/GA cryogel at a high GA content (content ratio GA/AC = 1 and GA/PVA = 0.2). GA cross-linked PVA multilayer coverage is an effective barrier for adsorption on AC particles. Variations in surface chemistry (AC initial and oxidized in air at 300 C for 12 h) and content (14-62.5%w/w) of ACs in PVA/GA/AC composites relatively weakly affect their textural characteristics at a high GA content (specific surface area S-BET < 120 m(2)/g, pore volume V-p < 0.35 cm(3)/g). However, PVA/GA/AC composite rods formed with a lower concentration of GA (content ratio GA/AC = 1/6 and GA/PVA = 1/10) have significantly greater S-BET (similar to 500 m(2)/g) and V-p (>0.55 cm(3)/g) values because of improved accessibility of the AC surface. This provides better adsorption of methylene blue as a probe compound.
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