Preparation and adsorption of carboxymethyl cellulose graphene composite aerogels
Cellulose graphene composite aerogels (CMC/GA) were prepared by one-step hydrothermal reaction based on graphite oxidation with the addition of low cost carboxymethyl cellulose. The functional group structure and microstructure of CMC/GA were characterized. The mechanism and capacity of the adsorpti...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2020-09-01
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| Series: | Journal of Materials Engineering |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000819 |
| Summary: | Cellulose graphene composite aerogels (CMC/GA) were prepared by one-step hydrothermal reaction based on graphite oxidation with the addition of low cost carboxymethyl cellulose. The functional group structure and microstructure of CMC/GA were characterized. The mechanism and capacity of the adsorption of Methylene Blue (MB) were investigated by CMC/GA in water. The results show that the higher temperature and higher initial concentration of MB are beneficial to the adsorption of CMC/GA. The adsorption isotherm is fitted with Langmuir model, the adsorption activation energy of the system is 57.951 kJ·mol<sup>-1</sup>, indicating that the adsorption of MB by CMC/GA is monolayer and belongs to chemical adsorption. The adsorption kinetics of MB is fitted with pseudo-second-order kinetics model. The intrapartical diffusion model of MB with different concentration shows that the adsorption process of CMC/GA for MB can be divided into two stages:macroporous diffusion and microporous diffusion, and the diffusion rate of macroporous diffusion is obviously higher than that of microporous diffusion. |
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| ISSN: | 1001-4381 1001-4381 |