Effects of alcohols as sacrificial reagents on a copper-doped sodium dititanate nanosheets/graphene oxide photocatalyst in CO 2 photoreduction.

Autor: Kitjanukit N; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Neamsung W; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Karawek A; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Lertthanaphol N; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Chongkol N; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Hiramatsu K; Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University Rokkodai-cho 1-1, Nada Kobe 657-8501 Japan., Sekiguchi T; Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University Rokkodai-cho 1-1, Nada Kobe 657-8501 Japan., Pornsuwan S; Department of Chemistry, Faculty of Science and Center of Excellence for Innovation in Chemistry, Mahidol University Bangkok 10400 Thailand., Sakurai T; Research Facility Center for Science and Technology, Kobe University Rokkodai-cho 1-1, Nada Kobe 657-8501 Japan., Jonglertjunya W; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Phadungbut P; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th., Ichihashi Y; Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University Rokkodai-cho 1-1, Nada Kobe 657-8501 Japan., Srinives S; Department of Chemical Engineering, Faculty of Engineering, Mahidol University Nakhon Pathom 73170 Thailand sira.sri@mahidol.ac.th.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2024 Sep 02; Vol. 14 (38), pp. 27980-27989. Date of Electronic Publication: 2024 Sep 02 (Print Publication: 2024).
DOI: 10.1039/d4ra04585h
Abstrakt: Carbon dioxide (CO 2 ) photoreduction is an intriguing approach that converts CO 2 into high-value substances with the assistance of a photocatalyst. Key to effective photoreduction is to promote the interaction of photo-induced holes and a sacrificial reagent (SCR), separating the holes from photoelectrons and enhancing the rate of the subsequent product generation. Methanol, ethanol, isopropanol, and water SCRs were tested for their ability to assist a copper-doped sodium dititanate nanosheets/graphene oxide heterostructure (CTGN) in CO 2 photoreduction. The CTGN photocatalyst was suspended in a CO 2 -saturated aqueous solution with the assigned SCR while illuminated by a mercury lamp. Product samples from the gas and liquid phases were analyzed for targeted product compositions. Methanol SCR exhibited the best performance in facilitating CO 2 photoreduction, producing ethanol as the main product at a total carbon consumption (TCC) of 6544 μmol g cat -1 . The remarkable performance of methanol is attributed to the high diffusivity and excellent stability of the hydroxymethyl radical that developed during the photoreduction. The kinetics studies revealed the first and second order for the CO 2 depletion and product generation rates, respectively, for the alcohol SCRs.
Competing Interests: The authors declare no financial or personal interest that affects professional judgment regarding the validity and analysis of this research.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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