Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 101, Issue -, Pages 103-112Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.inoche.2019.01.007
Keywords
CeO2/HTi2NbO7-NS; Exfoliation-restructuring; Ethyl mercaptan (EM); Type-II heterojunction; Photocatalytic oxidation
Categories
Funding
- National Natural Science Foundation of China [21271008]
- key Project of Collegiate Natural Science Fund of Anhui Province [KJ 2018A0089]
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CeO2/HTi2NbO7-NS nanocomposite based on HTi2NbO7 nanosheet (HTi2NbO7 -NPs) and Cerium dioxide nanoparticles (CeO2-NPs) was fabricated through an exfoliation-restructuring method. The as-prepared samples were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), laser Raman Spectroscopy (LRS), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflection spectroscopy (UV-Vis DRS) and N-2 adsorption-desorption measurements. The adsorption and photocatalytic properties of the as-prepared samples were evaluated using ethyl mercaptan (EM) in methane gas as the model pollutant. The results indicated that CeO2-NPs were uniformly distributed on the surface of HTi2NbO7-NS and the band gap energy of CeO2 /HTi2NbO7-NS nanocomposite was reduced compared with its precursor. The type-II heterojunction was formed due to suitable band structures of host and guest materials. The CeO2/HTi2NbO7-NS nanocomposite owns the best adsorption capacity and photocatalytic oxidation activity, which was mainly attributed to the lower band gap and efficient separation of electron-hole pairs of CeO2/HTi2NbO7-NS nanocomposite.
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