Environmental Applications of Chitosan and its Derivatives

Padmaja, P.; Bhatt, Ronak

doi:10.1002/9781119143802.ch42

Cited by 5 publications

(1 citation statement)

References 140 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the occurrence of such problems in recent years, scientists have made several attempts toward removal of existed pollutants such as toxic organic, chemicals substances and pathogenic microorganisms in water reservoirs 2 . A lot of industries, including the textile, tanneries and other chemical factories, continuously release a great amount of polluted wastewater originated from harmful waste materials like dyes, heavy metals and surfactants, which are major health issues all around the world 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of ternary MWCNTs/ZnO/Chitosan nanocomposite for enhanced photocatalytic degradation of methylene blue and antibacterial activity

Malekkiani

Magham

Ravari

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Developing a cheap, stable and effective photocatalyst is necessary for remediation of persistent organic pollutants. To address this challenge, we proposed a unique interfacial engineering technique and proper bandgap matching strategy to synthesize MWCNTs/ZnO/Chitosan ternary nanocomposite for effective photocatalytic application. The features of the prepared samples were determined by FESEM, TEM, EDX, elemental mapping, AFM, FT-IR, XRD, UV–Vis spectroscopy and BET surface analysis. The obtained results showed successful fabrication of synthesized nanocomposites with enhanced surface area. Degradation effect of nanostructures on methylene blue (MB) and antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis) pathogenic strains were investigated. The proposed photocatalytic mechanism illustrated the electron transfer facilitated by MWCNTs/ZnO/Chitosan structure which results in spatial separation of electron–hole pairs. Compared with ZnO and ZnO/Chitosan, the prepared MWCNTs/ZnO/Chitosan ternary nanocomposite showed high usage of UV illumination and superior separation of photogenerated electron–hole pairs. MWCNTs/ZnO/Chitosan illustrated 86.26% adsorption rate and outstanding increased photocatalytic activity on MB degradation efficiency of 98.76% after 20 min. Stability of photocatalyst reached from 98.76% initial decolorization to 85% at the fourth cycle. In addition, the ternary nanocomposite also exhibited remarkable bactericidal activity against gram-positive (S. aureus) and (B. subtilis) and gram-negative (E. coli) bacteria strains. Due to the obtained results, the prepared nanocomposite would be an efficient candidate photocatalyst with antibacterial properties.

show abstract

Section: Introductionmentioning

confidence: 99%