Role of functional groups in the production of self-assembled microfibrillated cellulose hybrid frameworks and influence on separation mechanisms of dye from aqueous medium
2020 (engelsk)Inngår i: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 155, s. 1541-1552Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
In this article, the role of surface ζ-potential, surface charge density of functional groups and available surface functional groups (-OH and –COO−) of microfibrillated cellulose (MFC) was explored in the production of self-assembled dimensional frameworks. Furthermore, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) oxidation of MFC and in situ TEMPO functionalization of produced frameworks were performed. The effect of increased charge density of carboxylic groups (-COO−) and decrease in surface ζ-potential on binding of titanium dioxide (TiO2) and horseradish peroxidase (HRP) was investigated further. High binding of TiO2 and HRP was reported due to high density of carboxylic group (-COO-) on produced functional frameworks. Thereafter, a model water of Irgalite Violet NZ dye was targeted to understand the behavior of available functional groups and introduced surface ζ-potential of frameworks towards adsorption of dye. Possible size-exclusion of dye aggregates was also explored using neat-MFC frameworks. Photo-oxidation (TiO2) and enzymatic catalysis (HRP) were studied further and highly effective system towards dye degradation was reported. Lastly, this study has shown a well deliberated quantitative understanding of functional groups/their density responsible for the production of frameworks and separation of dye.
sted, utgiver, år, opplag, sider
Elsevier B.V. , 2020. Vol. 155, s. 1541-1552
Emneord [en]
Adsorption, Enzyme catalysis, Microfibrillated cellulose, Photocatalysis, Size-exclusion, Surface charge density, 2, 2, 6, 6 tetramethyl 1 piperidinyloxy, cellulose, dye, horseradish peroxidase, microfibrillated cellulose, piperidine, titanium dioxide, unclassified drug, adsorption, aqueous solution, Article, binding affinity, catalysis, controlled study, degradation, hybridization, oxidation, particle size, separation technique, surface property, zeta potential
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Identifikatorer
URN: urn:nbn:se:ri:diva-50123DOI: 10.1016/j.ijbiomac.2019.11.131Scopus ID: 2-s2.0-85085536589OAI: oai:DiVA.org:ri-50123DiVA, id: diva2:1492876
2020-11-032020-11-032020-12-01bibliografisk kontrollert