Cobalt Doped Titania-Carbon Nanosheets with Induced Oxygen Vacancies for Photocatalytic Degradation of Complex Radioactive Waste

25 Pages Posted: 14 Jun 2022

See all articles by Islam Alhindawy

Islam Alhindawy

Nuclear Materials Authority

Hamed Mira

Nuclear Materials Authority

Ahmed Youssef

Ain Shams University

Saad Abdelwahab

Ain Shams University

Ahmed Zaher

Mansoura University

Waleed El-Said

University of Jeddah

Emad Elshehy

Nuclear Materials Authority

Amr Abdelkader

University of Cambridge

Abstract

The photocatalytic degradation of uranium complexes is considered among the most efficient techniques for the efficient removal of uranium ions/complexes from radioactive wastewater. Described here is a nanostructured photocatalyst based on cobalt doped TiO 2 composite with induced oxygen vacancies (Co@TiO 2 -C) for the photocatalytic removal of uranium complex from contaminated water. The synergy between oxygen vacancies and Co-doping produced a material with a 1.7 eV bandgap, while the carbon network facilitates the electron movement and hinders the e-h recombination. As a result, the new photocatalyst enables the decomposition of uranium-arsenazo III complexes (U-ARZ3), followed by photocatalytic reduction of hexavalent uranium to insoluble tetravalent. Combined with the high surface area of the nanosheets structure, the efficiency and kinetics of the photocatalytic decomposition and reduction significantly enhanced, reaching almost full U(VI) removal in less than 20 minutes from solution with concentration as high as 1000 mL g -1 . Moreover, the designed photocatalyst exhibits excellent stability and reusability without decreasing the photocatalytic performance after 5 cycles.

Keywords: Photocatalytic degradation, Titanium cobalt photocatalysis, radioactive waste wastewater treatment

Suggested Citation

Alhindawy, Islam and Mira, Hamed and Youssef, Ahmed and Abdelwahab, Saad and Zaher, Ahmed and El-Said, Waleed and Elshehy, Emad and Abdelkader, Amr, Cobalt Doped Titania-Carbon Nanosheets with Induced Oxygen Vacancies for Photocatalytic Degradation of Complex Radioactive Waste. Available at SSRN: https://ssrn.com/abstract=4136267 or http://dx.doi.org/10.2139/ssrn.4136267

Islam Alhindawy

Nuclear Materials Authority ( email )

Cairo
Egypt

Hamed Mira

Nuclear Materials Authority ( email )

Cairo
Egypt

Ahmed Youssef

Ain Shams University ( email )

Cairo
Egypt

Saad Abdelwahab

Ain Shams University ( email )

Cairo
Egypt

Ahmed Zaher

Mansoura University ( email )

60 El-Gomhoria Street
Mansoura, P.N. 35516, 35516
Egypt

Waleed El-Said

University of Jeddah ( email )

Emad Elshehy

Nuclear Materials Authority ( email )

Cairo
Egypt

Amr Abdelkader (Contact Author)

University of Cambridge ( email )

Trinity Ln
Cambridge, CB2 1TN
United Kingdom

Do you have negative results from your research you’d like to share?

Paper statistics

Downloads
47
Abstract Views
214
PlumX Metrics