New TiO2-doped Cu-Mg spinel-ferrite-based photocatalyst for degrading highly toxic rhodamine B dye in wastewater

Chinh Van Tran; Duong Duc La; Phuong Nguyen Thi Hoai; Ha Duc Ninh; Phuong Nguyen Thi Hong; Thu Ha T Vu; Ashok Kumar Nadda; X Cuong Nguyen; D Duc Nguyen; Huu Hao Ngo

doi:10.1016/j.jhazmat.2021.126636

New TiO₂-doped Cu-Mg spinel-ferrite-based photocatalyst for degrading highly toxic rhodamine B dye in wastewater

J Hazard Mater. 2021 Oct 15:420:126636. doi: 10.1016/j.jhazmat.2021.126636. Epub 2021 Jul 13.

Authors

Affiliations

¹ Institute of Chemistry and Materials, Nghia Do, Cau Giay, Hanoi, Vietnam.
² School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam.
³ State Key Laboratory for Petrochemical and Refinery Technologies, Vietnamese Institute of Industrial Chemistry, Hanoi, Vietnam.
⁴ Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan 173234, Himachal Pradesh, India.
⁵ Laboratory of Energy and Environmental Science, Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam; Faculty of Environmental Chemical Engineering, Duy Tan University, Da Nang 550000, Vietnam.
⁶ Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, HCM City 755414, Vietnam; Department of Environmental Energy Engineering, Kyonggi University, South Korea. Electronic address: nguyensyduc@gmail.com.
⁷ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.

PMID: 34280722
DOI: 10.1016/j.jhazmat.2021.126636

Abstract

The quest for finding an effective photocatalyst for environmental remediation and treatment strategies is attracting considerable attentions from scientists. In this study, a new hybrid material, Cu_0.5Mg_0.5Fe₂O₄-TiO₂, was designed and fabricated using coprecipitation and sol-gel approaches for degrading organic dyes in wastewater. The prepared hybrid materials were fully characterized using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The results revealed that the Cu_0.5Mg_0.5Fe₂O₄-TiO₂ hybrid material was successfully synthesized with average particle sizes of 40.09 nm for TiO₂ and 27.9 nm for Cu_0.5Mg_0.5Fe₂O₄. As the calculated bandgap energy of the hybrid material was approximately 2.86 eV, it could harvest photon energy in the visible region. Results indicate that the Cu_0.5Mg_0.5Fe₂O₄-TiO₂ also had reasonable magnetic properties with a saturation magnetization value of 11.2 emu/g, which is a level of making easy separation from the solution by an external magnet. The resultant Cu_0.5Mg_0.5Fe₂O₄-TiO₂ hybrid material revealed better photocatalytic performance for rhodamine B dye (consistent removal rate in the 13.96 × 10^-3 min^-1) compared with free-standing Cu_0.5Mg_0.5Fe₂O₄ and TiO₂ materials. The recyclability and photocatalytic mechanism of Cu_0.5Mg_0.5Fe₂O₄-TiO₂ are also well discussed.

Keywords: Cu(0.5)Mg(0.5)Fe(2)O(4)–TiO(2) hybrid materials; Organic pollutants; Photodegradation; Rhodamine B.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Aluminum Oxide
Catalysis
Ferric Compounds
Magnesium Oxide
Rhodamines
Titanium*
Wastewater*

Substances

Ferric Compounds
Rhodamines
Waste Water
spinell
ferrite
titanium dioxide
Magnesium Oxide
Titanium
rhodamine B
Aluminum Oxide