Mn 2+ Doped Cobalt Oxide and Its Composite with Carbon Nanotubes for Adsorption-Assisted Photocatalytic Applications

Muhammad Fida, Shahid Iqbal (), Mazloom Shah, Tanzeela Fazal, Bushra Ismail (), Hafiz ur Rehman, Foziah F. Al-Fawzan, Eslam B. Elkaeed, Rami Adel Pashameah, Eman Alzahrani and Abd-ElAziem Farouk
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Muhammad Fida: Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus, Khyber Pakhtunkhwa 22010, Pakistan
Shahid Iqbal: Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad 46000, Pakistan
Mazloom Shah: Department of Chemistry, Abbottabad University of Science and Technology, Abbottabad 22010, Pakistan
Tanzeela Fazal: Department of Chemistry, Abbottabad University of Science and Technology, Abbottabad 22010, Pakistan
Bushra Ismail: Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus, Khyber Pakhtunkhwa 22010, Pakistan
Hafiz ur Rehman: Department of Chemistry, Quaid-i-Azam University, Islamabad 15320, Pakistan
Foziah F. Al-Fawzan: Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
Eslam B. Elkaeed: Department of Pharmaceutical Sciences, College of Pharmacy, AlMaarefa University, Riyadh 13713, Saudi Arabia
Rami Adel Pashameah: Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah 24230, Saudi Arabia
Eman Alzahrani: Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Abd-ElAziem Farouk: Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia

Sustainability, 2022, vol. 14, issue 24, 1-17

Abstract: In this study, cobalt oxide (Co 3 O 4 ), Mn-doped Co 3 O 4 (MDCO), and Mn-doped Co 3 O 4 -functionalized carbon nanotube (MDCO-CNTs) were synthesized via the co-precipitation method using cobalt nitrate and manganese nitrate as a cobalt and manganese precursor, respectively. Synthesized materials were assessed using different characterization techniques like scanning electron microscopy, X-ray diffraction, and UV-visible spectroscopy. Congo red in an aqueous solution was adopted as the model dye to estimate the adsorption-assisted photocatalytic efficiency of the synthesized materials. The samples studied for adsorpsstion-assisted photocatalysis were found to be highly effective and among all the samples, the best removal performance (80%) was obtained by treating the MDCO-CNTs composite for 50 min at 50 °C. Mathematical modeling shows that all of the samples followed a pseudo-second-order kinetic model and data best fitted to a Langmuir isotherm, implying that the process involved in the removal of Congo red dye is chemisorption.

Keywords: cobalt oxide; carbon nanotubes; photocatalysis; nanocomposite; water treatment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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