کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4987904 1455290 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced desalination performance of carboxyl functionalized graphene oxide nanofiltration membranes
ترجمه فارسی عنوان
عملکرد نابجا سازی عملکرد غشاء نانوفیلتراسیون اکسید گرافن کاربوسیله فعال شده افزایش یافته است
کلمات کلیدی
اکسید گرافیت کارباکلیک، خودآموزشی با کمک فشار، نانوفیلتراسیون، نمک زدایی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
The desalting performance of graphene oxide (GO) membranes was further optimized using one-step carboxylation via nucleophilic substitution reactions between epoxy groups of graphene oxide (GO) and amino groups of glycine. GO and GO-COOH membranes with highly ordered structure were prepared by pressure-assisted self-assembly technique. The performance of GO and GO-COOH membranes was investigated and compared. The results showed that GO-COOH membranes exhibited not only higher permeability but also better salt rejections compared with pristine GO membranes. The surface physicochemical properties of GO-COOH membrane including negativity and hydrophilicity were improved as well. The transport mechanism revealed that the improvement of desalting properties was attributed to enhanced electrostatic repulsion by inducing effective negative charge. The higher permeability of GO-COOH membranes resulted from increased water nanochannels and improved surface hydrophilicity. Overall, GO-COOH membranes show great potential in the separation field due to prominent permeation performance and desirable separation property.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 405, 1 March 2017, Pages 29-39
نویسندگان
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