Gd-cobalt selenite as an efficient nanocomposite for aniline synthesis from photocatalytic reduction of nitrobenzene

Journal Article · Thu Mar 15 00:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.11.003· OSTI ID:22805435

Aljahdali, Mutlaq S., E-mail: [e-mail] ^[1]; Amin, M.S., E-mail: [e-mail] ^[2]; Chemistry Department, Faculty of Science, Ain Shams University, Cairo ^[3]; Mohamed, R.M., E-mail: [e-mail] ^[1]; Advanced Materials Department, Central Metallurgical R&D Institute, CMRDI, P.O .Box 87, Helwan, Cairo ^[3]

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1. Department of Chemistry, Faculty of Science, King Abdulaziz University, PO Box 80203, 21589, Jeddah (Saudi Arabia)
2. Chemistry Department, College of Science, Taibah University (Saudi Arabia)
3. (Egypt)

Highlights: • Gd-CoSeO{sub 3} nanocomposites were prepared via Sol- Gel method. • The effect of weight percent of Gd on the morphology of products were investigated. • 0.3 wt% Gd-CoSeO{sub 3} exhibited the highest catalytic activity for reduction of nitrobenzene under visible light. - Abstract: In this investigation, Gd-CoSeO{sub 3} nanocomposite with controlled Gd doping contents was synthesized using a sol gel method. The resultant specimen was found to have large specific surface area (115 m{sup 2}/g) and limited particle size (15 nm). TEM examination illustrated that the synthesized Gd-CoSeO{sub 3} nanocomposite exhibited nanospherical morphology. Also, it was revealed that band gap controlling of the CoSeO{sub 3} nanoparticles could be accomplished via managing the Gd contents. The photocatalytic activity of the Gd-CoSeO{sub 3} nanocomposite samples was inspected via Nitrobenzene – aniline transformation applying visible light irradiation. Gadolinium doping was adopted to improve the photo-catalytic of the synthesized CoSeO{sub 3}. This can be accredited to band gap decrease of CoSeO{sub 3} by Gd doping as well as life time increase of e-h recombination rate which occur via electron trapping by Gd metal. Therefore, we can prepare an efficient photocatalyst by sol- gel method and photoassisted deposition method to control band gap and e-h recombination rate.

• OSTI ID: 22805435
• Journal Information: Materials Research Bulletin, Vol. 99; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANILINE
COBALT COMPOUNDS
DEPOSITION
ELECTRONS
GADOLINIUM
GADOLINIUM COMPOUNDS
IRRADIATION
MORPHOLOGY
NANOCOMPOSITES
NANOPARTICLES
NITROBENZENE
PARTICLE SIZE
PHOTOCATALYSIS
SELENITES
SOL-GEL PROCESS
SPECIFIC SURFACE AREA
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
TRAPPING
VISIBLE RADIATION