Efficient degradation of methylene blue by Co(II) complexes constrained to the hall of mesoporous silica decorated by Pt nanoparticles

[Display omitted] •Novel Pt-MSHSs-Co nanocomposite was synthesized by a step-by-step method.•Pt-MSHSs-Co showed excellent visible-light photodegradation performances of MB.•Results suggested a synergistic effect derived from Pt NPs, MSHSs and Co(II) complex. This research has introduced a step-by-st...

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Bibliographic Details
Published in:Materials letters 2020-01, Vol.259, p.126776, Article 126776
Main Authors: Ghazvini, Maryam, Abolhosseini Shahrnoy, Abdolghafar
Format: Article
Language:English
Subjects:
Catalytic activity
Cobalt
Cobalt compounds
Cobalt(II) complex
Electron microscopy
Fourier transforms
Infrared analysis
Materials science
Mesoporous silica hollow spheres (MSHSs)
Methylene blue
Microscopy
Morphology
Nanoparticles
Phase composition
Photocatalysis
Photocatalyst
Photodegradation
Platinum
Platinum nanoparticles
Reaction time
Silicon dioxide
Structural analysis
Substrates
Synergistic effect
Thermogravimetric analysis
X ray powder diffraction
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Summary:[Display omitted] •Novel Pt-MSHSs-Co nanocomposite was synthesized by a step-by-step method.•Pt-MSHSs-Co showed excellent visible-light photodegradation performances of MB.•Results suggested a synergistic effect derived from Pt NPs, MSHSs and Co(II) complex. This research has introduced a step-by-step method for covalently immobilization of cobalt(II) complex on platinum nanoparticles decorated mesoporous silica hollow spheres (Pt-MSHSs). Scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption-desorption, and thermogravimetric analysis have been used for characterization of the surface, structure, size, phase composition, and morphology of the synthesized materials. The prepared materials have been applied as a photocatalyst for photodegradation of methylene blue. Compared with mesoporous silica hollow spheres (MSHSs) and Pt-MSHSs samples, the Pt-MSHSs-Co catalyst can significantly increase photocatalytic performance with 98.82% yield at the reaction time of 60 min. The results suggested a synergistic effect derived from platinum nanoparticles, MSHSs substrate and cobalt(II) complex, which enhanced photocatalytic activity obviously.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.126776