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Photocatalytic reduction of CO2 in cyclohexanol on CdS–TiO2 heterostructured photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
39964 45841 2014 6 PDF Available
Title
Photocatalytic reduction of CO2 in cyclohexanol on CdS–TiO2 heterostructured photocatalyst
Abstract

•CdS–TiO2 photocatalysts with different molar ratios were synthesized by two-step hydrothermal synthesis.•CdS–TiO2 photocatalysts performed good activity under UV–vis light illuminated.•Photocatalytic reduction of CO2 was investigated by using cyclohexanol as reductant.•Cyclohexyl formate and cyclohexanone were producted by photocatalytic reduction of CO2 in cyclohexanol.

A nanosheet of CdS–TiO2 with heterojunction was prepared by a two-step hydrothermal synthesis method and used as a photocatalyst for reducing CO2 in cyclohexanol. This heterostructured composite has been characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible (UV–vis) diffuse reflectance spectroscopy (DRS). The activity of the CdS–TiO2 composite was tested in a batch slurry bed reactor. The results showed that CO2 absorbed in cyclohexanol was reduced to cyclohexyl formate (CF) on conduction band and the absorbent cyclohexanol was oxidized to cyclohexanone (CH) on valance band of the photocatalyst. It was revealed that the highest formation rates of 20.2 μmol/(gcat h) and 20.0 μmol/(gcat h) for CF and CH could be obtained when TiO2/CdS with the molar ratio of 8 was used. Overall, this work provides a novel pathway for photocatalytically reducing CO2 and preventing the catalyst from photocorrosion.

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Keywords
Photocatalytic reduction; CO2; Heterostructured photocatalyst; CdS–TiO2; Nanosheets; Cyclohexanol
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Photocatalytic reduction of CO2 in cyclohexanol on CdS–TiO2 heterostructured photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 473, 5 March 2014, Pages 90–95
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us