Humic acid-assisted synthesis of Ag/Ag2MoO4 and Ag/Ag2WO4 and their highly catalytic reduction of nitro- and azo-aromatics

Yaya Song; Wenyu Xie; Chao Yang; Dandi Wei; Xintai Su; Li Li; Lu Wang; Jide Wang

Journal of Materials Research and Technology (May 2020)

Humic acid-assisted synthesis of Ag/Ag2MoO4 and Ag/Ag2WO4 and their highly catalytic reduction of nitro- and azo-aromatics

Yaya Song,
Wenyu Xie,
Chao Yang,
Dandi Wei,
Xintai Su,
Li Li,
Lu Wang,
Jide Wang

Affiliations

Yaya Song: Key Laboratory of Resources Chemistry of Nonferrous Metals (Ministry of Education), College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
Wenyu Xie: Faculty of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, P. R. China
Chao Yang: Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China; Corresponding author.
Dandi Wei: Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China
Xintai Su: Engineering and Technology Research Center for Environmental Nanomaterials, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China
Li Li: Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China
Lu Wang: Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China
Jide Wang: Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China

Journal volume & issue: Vol. 9, no. 3
pp. 5774 – 5783

Abstract

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Herein, Ag/Ag2MoO4 and Ag/Ag2WO4 have been prepared via a humic acid-assisted precipitation-calcination process and used as catalysts for the hydrogenation reduction of nitro- and azo-aromatic compounds. The Ag/Ag2MoO4 and Ag/Ag2WO4 composites were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FTIR) and Raman spectroscopies, UV–vis-NIR diffuse reflectance spectroscopy (DRS), and nitrogen adsorption-desorption analyses. Metallic Ag nanoparticles were in situ generated during the annealing process and spatially confined in the Ag2MoO4 or Ag2WO4 matrix, which effectively inhabited the particle agglomeration of silver. The Ag/Ag2MoO4 and Ag/Ag2WO4 catalysts displayed good performance toward the hydrogenation reduction of 4-nitrophenol, 2-nitroaniline, and rhodamine B in terms of rapid conversion and long term durability.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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