نوع مقاله : پژوهشی
عنوان مقاله English
نویسندگان English
This study investigated the effect of using polymethyl methacrylate(PMMA) as pore-forming agent along with potassium hydroxide(KOH) activator to synthesize polyacrylonitrile(PAN) carbon adsorbents with high porosity to enhance the adsorbent performance in methylene blue(MB) adsorption. PMMA nanoparticles were synthesized by mini-emulsion polymerization method. BET, FE-SEM-EDX and FTIR analyses were used to evaluate the carbon adsorbents. The specific surface area of PAN_based adsorbents increased from 10.6 to 393.6 m2/g with PMMA particles, and to 1897 m2/g after activation. FTIR results confirmed the removal of carbonyl groups and the presence of effective functional groups after activation. After simultaneous activation, the percentage of MB removal by the carbon adsorbent increased from 54% to 91%. The maximum adsorption capacity for the best sample was 2065 mg/g, which followed the Langmuir isotherm. The results showed that this combination method significantly increased the pore development, the adsorption capacity, and ultimately increased the performance of the carbon adsorbent.
کلیدواژهها English