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Articles

Enhanced photocatalytic performance for ethyl mercaptan by CoO/HTi2NbO7-NS p-n heterojunction nanocomposites

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Pages 468-476 | Received 26 Mar 2021, Accepted 28 Aug 2021, Published online: 23 Sep 2021
 

Abstract

CoO/HTi2NbO7-NS nanocomposite was constructed via the composite procedure of HTi2NbO7 nanosheet (HTi2NbO7-NS) and cobalt oxide nanoparticles (CoO-NPs) by a hydrothermal method. The as-prepared samples were characterized by XRD, HRTEM, EDS, LRS, XPS, and UV-Vis DRS. The adsorption and photocatalytic performances of the as-prepared samples were evaluated using ethyl mercaptan (EM) in methane gas as the model pollutant. Results indicated that CoO-NPs were uniformly distributed on the surface of HTi2NbO7-NS. The interfacial p-n heterojunction was formed. The spectral absorption edge of CoO/HTi2NbO7-NS was significantly red-shifted and the band gap was narrowed compared with HTi2NbO7-NS due to the interaction. The results also shown that CoO/HTi2NbO7-NS has the largest adsorption capacity for EM at 340.5 μmol g−1 and the strongest photocatalytic oxidation performance, the EM could be photocatalytic oxidized to sulfoxide. The present work indicated that the p-n heterojunction material of the CoO/HTi2NbO7-NS was promising for mercaptans adsorption and degradation.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Anhui Provincial Natural Science Foundation [grant no. 2008085QE194], the Key Project of Collegiate Natural Science Fund of Anhui Province [grant no. KJ2018A0089] and Funded by Research Foundation of the Institute of Environment-friendly Materials and Occupational Health of Anhui University of Science and Technology (Wuhu) [grant nos. ALW2020YF01 and ALW2020YF09].

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