Process Optimization by a Response Surface Methodology for Adsorption of Congo Red Dye onto Exfoliated Graphite-Decorated MnFe2O4 Nanocomposite: The Pivotal Role of Surface Chemistry

Van Thinh Pham; Hong-Tham T. Nguyen; Duyen Thi Cam Nguyen; Hanh T. N. Le; Thuong Thi Nguyen; Nhan Thi Hong Le; Kwon Teak Lim; Trinh Duy Nguyen; Thuan Van Tran; Long Giang Bach

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2019.0878

Published Article

LAPSE:2019.0878

Process Optimization by a Response Surface Methodology for Adsorption of Congo Red Dye onto Exfoliated Graphite-Decorated MnFe2O4 Nanocomposite: The Pivotal Role of Surface Chemistry

Van Thinh Pham, Hong-Tham T. Nguyen, Duyen Thi Cam Nguyen, Hanh T. N. Le, Thuong Thi Nguyen, Nhan Thi Hong Le, Kwon Teak Lim, Trinh Duy Nguyen, Thuan Van Tran, Long Giang Bach

July 31, 2019

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.

Record ID

LAPSE:2019.0878

Keywords

Boehm titration, Congo red decontamination, exfoliated graphite, MnFe2O4 nanoparticles, response surface methodology, surface functional groups

Subject

Materials

Suggested Citation

Pham VT, T. Nguyen HT, Thi Cam Nguyen D, T. N. Le H, Thi Nguyen T, Thi Hong Le N, Lim KT, Duy Nguyen T, Tran TV, Bach LG. Process Optimization by a Response Surface Methodology for Adsorption of Congo Red Dye onto Exfoliated Graphite-Decorated MnFe2O4 Nanocomposite: The Pivotal Role of Surface Chemistry. (2019). LAPSE:2019.0878

Author Affiliations

Pham VT: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Graduate University of Science and
T. Nguyen HT: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam
Thi Cam Nguyen D: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Department of Pharmacy, Nguyen Tat [ORCID]
T. N. Le H: Institute of Hygiene and Public Health, Ho Chi Minh City 700000, Vietnam
Thi Nguyen T: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam [ORCID]
Thi Hong Le N: Ho Chi Minh City University of Technology, Vietnam National University-Ho Chi Minh City, Ho Chi Minh City 703500, Vietnam
Lim KT: Department of Display Engineering, Pukyong National University, Busan 608-737, Korea
Duy Nguyen T: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam [ORCID]
Tran TV: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Center of Excellence for Green Energy and Environmental Nanomaterials, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam [ORCID]
Bach LG: NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 755414, Vietnam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi City 100000, Vietnam; Center of Excellence for Functional Polymers and Na
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Journal Name

Processes

Volume

7

Issue

5

Article Number

E305

Year

2019

Publication Date

2019-05-21