Adsorption and Photocatalytic Degradation of Crystal Violet Dye under Sunlight Irradiation Using Natural and Modified Clays by Zinc Oxide
- سال انتشار: 1401
- محل انتشار: نشریه متدهای شیمیایی، دوره: 6، شماره: 9
- کد COI اختصاصی: JR_CHM-6-9_003
- زبان مقاله: انگلیسی
- تعداد مشاهده: 109
نویسندگان
Laboratory of Physicochemical Studies, University of Saida - Dr. Moulay Tahar, Algeria
Laboratory of Chemistry and Environmental Science, Faculty of Exact Sciences, University of TAHRI Mohamed Bechar, BP ۴۱۷ Kenadsa Road, Bechar ۰۸۰۰۰, Algeria
Laboratory of Physicochemical Studies, University of Saida - Dr. Moulay Tahar, Algeria
Department of Life and Natural Sciences, University of Adrar - Ahmed Draia, Algeria
aboratory of Chemistry and Environmental Science, Faculty of Exact Sciences, University of TAHRI Mohamed Bechar, BP ۴۱۷ Kenadsa Road, Bechar ۰۸۰۰۰, Algeria
aboratory of Chemistry and Environmental Science, Faculty of Exact Sciences, University of TAHRI Mohamed Bechar, BP ۴۱۷ Kenadsa Road, Bechar ۰۸۰۰۰, Algeria
Laboratory of Catalysis and Synthesis in Organic Chemistry, University of Tlemcen, B.P. ۱۱۹ Tlemcen ۱۳۰۰۰, Algeria
چکیده
A ZnO-supported natural volcanic Algerian clay (ZnO/CNA) was synthesized through an impregnation method to prepare a photocatalytic adsorbent integrated. The discoloration of crystal violet dye (CV) from an aqueous solution was carried out using natural and modified clays via zinc oxide by adsorption and photocatalytic degradation. The materials were characterized through X-ray fluorescence spectrometer (XRF), Scanning electronic microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The effects of diverse experimental parameters on the adsorption process efficiency were investigated. The photocatalysis process of CV was executed by the ZnO/CNA material under sunlight irradiation. The characterization results informed that ZnO nanoparticles were well dispersed on the clay surface (CNA). The adsorption experiments were well clarified via the kinetic model of pseudo-second-order and isotherm model of Langmuir with correlation coefficients (R۲ > ۰.۹۹). Moreover, thermodynamic data showed that CV adsorption was endothermic, spontaneous, and physical. The adsorption capacity of CV was high utilizing ZnO/CNA material and gives ۷۴.۶۳ mg/g by the Langmuir equation. The photodegradation kinetics followed pseudo-۱st order approximate the model of Langmuir-Hinshelwood. The discoloration efficiency with the ZnO/CNA (∼ ۹۲%) was higher compared with the CNA (۶۷%), clearly suggesting promoting effect of ZnO.کلیدواژه ها
Clay, ZnO, Crystal violet dye, Adsorption, Photocatalysis, Sunlight irradiationاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.