Adsorption and photocatalyst assisted dye removal and bactericidal performance of ZnO/chitosan coating layer

Tahseen Kamal; Mazhar Ul-Islam; Sher Bahadar Khan; Abdullah M Asiri

doi:10.1016/j.ijbiomac.2015.08.060

Adsorption and photocatalyst assisted dye removal and bactericidal performance of ZnO/chitosan coating layer

Int J Biol Macromol. 2015 Nov:81:584-90. doi: 10.1016/j.ijbiomac.2015.08.060. Epub 2015 Aug 28.

Authors

Tahseen Kamal¹, Mazhar Ul-Islam², Sher Bahadar Khan³, Abdullah M Asiri³

Affiliations

¹ Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia. Electronic address: tkkhan@kau.edu.sa.
² Department of Chemical Engineering, College of Engineering, Dhofar University, Salalah, Sultanate of Oman.
³ Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

PMID: 26321421
DOI: 10.1016/j.ijbiomac.2015.08.060

Abstract

Pure chitosan and its zinc oxide composite coatings were applied on microfibriller cellulose mat (MCM) to prepare chitosan coated microfibriller cellulose (Chi-MCM) and zinc oxide/chitosan coated microfibriller cellulose (ZnO/Chi-MCM), respectively. X-ray diffraction (XRD), and scanning electron microscopy (SEM), were used to characterize the samples in this study. SEM images showed that dense chitosan solutions (3 and 5wt%) made a thick layer over MCM while diluted solution (1wt%) resulted in wrapping of the chitosan over the individual microfibers and avoided the thick layer formation. Removal of an azo dye methyl orange (MO) from aqueous solution using adsorption and combined adsorption with photodegradation activity of the Chi-MCM and ZnO/Chi-MCM were evaluated, respectively. Compared in the absence of UV light, ZnO/Chi-MCM showed faster and higher degree of dye removal by photocatalytic dissociation and adsorption under ultraviolet irradiation. Various parameters including pH of MO solution and its initial concentration were tested for the removal of MO dye. ZnO/Chi-MCM showed maximum adsorption capacity of 42.8mg/g. Antibacterial activities were also evaluated where ZnO/Chi-MCM displayed a remarkable performance inhibiting the Escherichia coli growth.

Keywords: Adsorption; Antibacterial; Photocatalyst.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Anti-Bacterial Agents / chemistry*
Anti-Bacterial Agents / pharmacology
Catalysis
Cellulose / chemistry
Chitosan / chemistry*
Coated Materials, Biocompatible / chemistry*
Coated Materials, Biocompatible / pharmacology
Coloring Agents / chemistry*
Disk Diffusion Antimicrobial Tests
Hydrogen-Ion Concentration
Photolysis*
X-Ray Diffraction
Zinc Oxide / chemistry*

Substances

Anti-Bacterial Agents
Coated Materials, Biocompatible
Coloring Agents
Cellulose
Chitosan
Zinc Oxide