| Autor: |
Pham, Van Thinh, T. Nguyen, Hong-Tham, Thi Cam Nguyen, Duyen, T. N. Le, Hanh, Thi Nguyen, Thuong, Thi Hong Le, Nhan, Lim, Kwon Teak, Duy Nguyen, Trinh, Tran, Thuan Van, Bach, Long Giang |
| Předmět: |
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| Zdroj: |
Processes; May2019, Vol. 7 Issue 5, p305, 1p |
| Abstrakt: |
Natural graphite, a locally available, eco-friendly, and low-cost carbonaceous source, can be easily transformed into exfoliated graphite (EG) with many surface functional groups via a chemical oxidation route. Combination between EG and magnetic MnFe2O4 is a promising strategy to create a hybrid kind of nanocomposite (EG@MnFe2O4) for the efficient adsorptive removal of Congo red (CR) dye from water. Here, we reported the facile synthesis and characterization of chemical bonds of EG@MnFe2O4 using several techniques such as Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). In particular, the quantity method by Boehm titration was employed to identify the content of functional groups: Carboxylic acid (0.044 mmol/g), phenol (0.032 mmol/g), lactone (0.020 mmol/g), and total base (0.0156 mmol/g) on the surface of EG@MnFe2O4. Through the response surface methodology-optimized models, we found a clear difference in the adsorption capacity between EG-decorated MnFe2O4 (62.0 mg/g) and MnFe2O4 without EG decoration (11.1 mg/g). This result was also interpreted via a proposed mechanism to elucidate the contribution of surface functional groups of EG@MnFe2O4 to adsorption efficiency towards CR dye. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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