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Photocatalytic conversion of CO2 in an aqueous solution using various kinds of layered double hydroxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
54102 46996 2015 5 PDF Available
Title
Photocatalytic conversion of CO2 in an aqueous solution using various kinds of layered double hydroxides
Abstract

•Various LDHs functioned as a photocatalyst in an aqueous solution.•CO was generated as a main reduction product of CO2.•Ni–Al LDH showed high efficiency for the photocatalytic conversion of CO2 to CO.•Amount of CO evolved was increased by the addition of chloride ions into the reaction solution.

We found that various layered double hydroxides (LDHs) showed good activity for the photocatalytic conversion of CO2 in an aqueous solution. Isotope experiments using 13CO2 as a substrate clearly revealed that CO was generated as a main reduction product of CO2. Ni–Al LDH (Ni/Al = 4) exhibited the largest amount of CO evolved among the various kinds of LDHs. Especially, Ni–Al LDHs fabricated from chlorides showed the higher conversion of CO2 to CO than those from nitrates. The amount of CO evolved was increased by the addition of chloride ions into the reaction solution, on the other hand, the addition of carbonate and hydrocarbonate ions did not enhance the conversion of CO2 but promoted the selectivity to H2 evolution for water splitting.

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Keywords
CO2 conversion; Photocatalyst; Layered double hydroxides; Aqueous solution; Chloride ion
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Photocatalytic conversion of CO2 in an aqueous solution using various kinds of layered double hydroxides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 251, 1 August 2015, Pages 140–144
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
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us