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Coupled adsorption-photocatalytic degradation of crystal violet under sunlight using chemically synthesized grafted sodium alginate/ZnO/graphene oxide composite.
Int J Biol Macromol. 2018 Mar; 108:1185-1198.IJ

Abstract

This research aimed to synthesize natural polymer nanocomposite and employ it for coupled adsorption- photocatalytic degradation of crystal violet. Sodium alginate-g-poly (acrylic acid-co-cinnamic acid) and its composites with ZnO nanorods and graphene oxide sheets were synthesized and characterized using FT-IR, XRD, SEM, HR-TEM and DR/UV-vis spectroscopy. The adsorption efficiency of samples for crystal violet has been studied in the dark. The effect of different parameters as pH, initial dye concentration, contact time and temperature on the adsorption efficiency of the synthesized sample has been examined. Kinetics studies showed that the adsorption of all samples was well described by the pseudo-second-order model and the equilibrium adsorption results fitted Freundlich model. The maximum adsorption capacity achieved at pH 5.0 was 13.85 mg g-1. Thermodynamic studies exhibited that the adsorption is spontaneous, endothermic in nature and leads to higher entropy. Coupled adsorption-photocatalytic degradation studies under sunlight showed an enhancement in the removal efficiency by 10%. In the case of sodium alginate-g-poly (acrylic acid-co-cinnamic acid)/ZnO/graphene oxide composite, the removal efficiency after 5 h under sunlight was 94% versus 84% in the dark.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Mohamed SK
Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo, 11795, Egypt. Electronic address: sahar.kamal@science.helwan.edu.eg.
Hegazy SH
Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo, 11795, Egypt.
Abdelwahab NA
Polymers and Pigments Department, National Research Centre, 33 El Bohouth Street, Dokki, Giza, P.O. 12622, Egypt.
Ramadan AM
Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo, 11795, Egypt.

MeSH

AdsorptionAlginatesCatalysisEnvironmental PollutantsGentian VioletGlucuronic AcidGraphiteHexuronic AcidsHydrogen-Ion ConcentrationKineticsPhotochemical ProcessesSolubilitySunlightZinc Oxide

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29133099

Citation

Mohamed, S K., et al. "Coupled Adsorption-photocatalytic Degradation of Crystal Violet Under Sunlight Using Chemically Synthesized Grafted Sodium alginate/ZnO/graphene Oxide Composite." International Journal of Biological Macromolecules, vol. 108, 2018, pp. 1185-1198.
Mohamed SK, Hegazy SH, Abdelwahab NA, et al. Coupled adsorption-photocatalytic degradation of crystal violet under sunlight using chemically synthesized grafted sodium alginate/ZnO/graphene oxide composite. Int J Biol Macromol. 2018;108:1185-1198.
Mohamed, S. K., Hegazy, S. H., Abdelwahab, N. A., & Ramadan, A. M. (2018). Coupled adsorption-photocatalytic degradation of crystal violet under sunlight using chemically synthesized grafted sodium alginate/ZnO/graphene oxide composite. International Journal of Biological Macromolecules, 108, 1185-1198. https://doi.org/10.1016/j.ijbiomac.2017.11.028
Mohamed SK, et al. Coupled Adsorption-photocatalytic Degradation of Crystal Violet Under Sunlight Using Chemically Synthesized Grafted Sodium alginate/ZnO/graphene Oxide Composite. Int J Biol Macromol. 2018;108:1185-1198. PubMed PMID: 29133099.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Coupled adsorption-photocatalytic degradation of crystal violet under sunlight using chemically synthesized grafted sodium alginate/ZnO/graphene oxide composite. AU - Mohamed,S K, AU - Hegazy,Sh H, AU - Abdelwahab,N A, AU - Ramadan,A M, Y1 - 2017/11/11/ PY - 2017/06/07/received PY - 2017/10/19/revised PY - 2017/11/06/accepted PY - 2017/11/15/pubmed PY - 2018/8/10/medline PY - 2017/11/15/entrez KW - Adsorption KW - Grafted sodium alginate KW - Photocatalytic degradation SP - 1185 EP - 1198 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 108 N2 - This research aimed to synthesize natural polymer nanocomposite and employ it for coupled adsorption- photocatalytic degradation of crystal violet. Sodium alginate-g-poly (acrylic acid-co-cinnamic acid) and its composites with ZnO nanorods and graphene oxide sheets were synthesized and characterized using FT-IR, XRD, SEM, HR-TEM and DR/UV-vis spectroscopy. The adsorption efficiency of samples for crystal violet has been studied in the dark. The effect of different parameters as pH, initial dye concentration, contact time and temperature on the adsorption efficiency of the synthesized sample has been examined. Kinetics studies showed that the adsorption of all samples was well described by the pseudo-second-order model and the equilibrium adsorption results fitted Freundlich model. The maximum adsorption capacity achieved at pH 5.0 was 13.85 mg g-1. Thermodynamic studies exhibited that the adsorption is spontaneous, endothermic in nature and leads to higher entropy. Coupled adsorption-photocatalytic degradation studies under sunlight showed an enhancement in the removal efficiency by 10%. In the case of sodium alginate-g-poly (acrylic acid-co-cinnamic acid)/ZnO/graphene oxide composite, the removal efficiency after 5 h under sunlight was 94% versus 84% in the dark. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/29133099/Coupled_adsorption_photocatalytic_degradation_of_crystal_violet_under_sunlight_using_chemically_synthesized_grafted_sodium_alginate/ZnO/graphene_oxide_composite_ DB - PRIME DP - Unbound Medicine ER -