01 مهر 1400
احمد آذري

احمد آذری

مرتبه علمی: دانشیار
نشانی: دانشکده مهندسی نفت، گاز و پتروشیمی - گروه مهندسی شیمی
تحصیلات: دکترای تخصصی / مهندسی شیمی
تلفن: 07733441913
دانشکده: دانشکده مهندسی نفت، گاز و پتروشیمی

مشخصات پژوهش

عنوان Synthesis and characterization of TiO2 nanoparticles loaded activated carbon for Congo Red removal from wastewater: kinetic and equilibrium studies
نوع پژوهش مقالات در نشریات
کلیدواژه‌ها
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مجله Desalination and Water Treatment
شناسه DOI
پژوهشگران احمد آذری (نفر اول) ، رضوان رضایی (نفر دوم) ، حمیدرضا سنایی پور (نفر سوم)

چکیده

Activated carbon (AC) was impregnated with titanium dioxide (TiO2) to synthesize AC/TiO2 nanocomposite through the sol-gel method at 400°C. Nanocomposite characterization was conducted by XRD, SEM and FTIR analyses. The synthesized nanoparticles were phase-pure anatase nanocrystallites with the average size of 10 nm. The AC/TiO2 nanocomposites were applied for the first time to photocatalytic decomposition of Congo red (CR) dye under ultraviolet (UV) irradiation in a photoreactor. The effects of AC/TiO2 nanocatalyst dosage (0.3–1 g), CR concentration (20–100 ppm), pH (3–9) and temperature (30–50°C) were examined for removal of CR solution pigments. Moreover, the adsorption kinetics and isotherm models were investigated on the AC and synthesized AC/ TiO2 nanophotocatalyst. The adsorption mechanism was found to be a pseudo-second-order kinetics with the good agreement for both adsorbents. Also the experimental isotherms were appropriately described by the Langmuir and Temkin models for AC adsorbent and AC/TiO2 nanocomposite, respectively.