کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
147444 456393 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly enhanced adsorption of congo red onto graphene oxide/chitosan fibers by wet-chemical etching off silica nanoparticles
ترجمه فارسی عنوان
جذب زیاد قرمز کنگو بر روی الیاف گرافیت اکسید / کیتوزان با استفاده از مواد شیمیایی خنک شیمیایی و خارج کردن نانوذرات سیلیکا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Graphene oxide/chitosan/silica fibers were prepared by a wet spinning technique.
• Porous fibers were produced through wet-chemical etching off silica nanoparticles.
• The maximum adsorption capacity of the porous fibers can reach 294.12 mg/g.
• The adsorption process was characterized by kinetics and isotherm analysis.

Graphene oxide/chitosan/silica fibers were prepared by a wet spinning technique. Silica nanoparticles were etched off from the graphene oxide/chitosan/silica fibers to produce graphene oxide/chitosan fibers with porous structure. The morphology and functional groups of the porous graphene oxide/chitosan fibers were characterized using scanning electron microscopy and Fourier-transform infrared spectroscopy, respectively. Adsorption experiments with the porous graphene oxide/chitosan fibers were performed based on various parameters, such as initial congo red concentration, solution pH, adsorbent dose and contact time. The Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models were employed to discuss the adsorption behavior. The results indicated that the equilibrium data were perfectly represented by the Langmuir isotherm. The maximum adsorption capacity reached 294.12 mg/g. The kinetics data were analyzed using pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion models and the pseudo-first-order model best described the adsorption of congo red onto the porous graphene oxide/chitosan fibers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 245, 1 June 2014, Pages 99–106
نویسندگان
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