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Synthesis and characterization of hexagonal boron nitride used for comparison of removal of anionic and cationic hazardous azo-dye: Kinetics and equilibrium studies

The purpose of this study was to compare the adsorption behavior of cationic and anionic dyes onto a hexagonal boron nitride (hBN) nanostructure that was rich in a negative charge. Herein, the hBN nanostructure was synthesized using boric acid as a precursor material. The characteristic peaks of the hBN nanostructure were performed using Fourier transform infrared (FT-IR) and Raman spectroscopies. The morphology and the particle size of hBN nanostructure were determined by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). During the studies, various essential adsorption parameters were investigated, such as the initial dye concentration, pH of the dye solution, adsorbent dose, and contact time. | Turkish Journal of Chemistry Turk J Chem 2020 44 1471-1482 http journals.tubitak.gov.tr chem TÜBİTAK Research Article doi 10.3906 kim-2004-23 Synthesis and characterization of hexagonal boron nitride used for comparison of removal of anionic and cationic hazardous azo-dye kinetics and equilibrium studies Tuba TARHAN Vocational High School of Health Services Mardin Artuklu University Mardin Turkey Received 09.04.2020 Accepted Published Online 10.08.2020 Final Version 16.12.2020 Abstract The purpose of this study was to compare the adsorption behavior of cationic and anionic dyes onto a hexagonal boron nitride hBN nanostructure that was rich in a negative charge. Herein the hBN nanostructure was synthesized using boric acid as a precursor material. The characteristic peaks of the hBN nanostructure were performed using Fourier transform infrared FT-IR and Raman spectroscopies. The morphology and the particle size of hBN nanostructure were determined by transmission electron microscopy TEM and scanning electron microscopy SEM . During the studies various essential adsorption parameters were investigated such as the initial dye concentration pH of the dye solution adsorbent dose and contact time. Under optimal conditions the removal of 42.6 Metanil yellow MY and 90 Victoria blue B VBB from aqueous solution was performed using a 10-mg hBN nanostructure. Furthermore the equilibrium studies showed that the Freundlich isotherm model fitted well for the removal of MY. However the Langmuir isotherm model fitted well for the removal of VBB. Moreover according to the results obtained from the kinetic studies while the first-order kinetic model was suited for the adsorption of the MY the second-order kinetic model was found to well fit for the adsorption of VBB. Key words Hexagonal boron nitride nanostructure Victoria blue B Metanil yellow comparison adsorption 1. Introduction In the modern age unnecessary industrial and anthropological activities cause numerous problems .