Highly porous Zr-MCM-48 immobilized Cu-porphyrin for photocatalytic reduction of CO2 to methanol in a slurry reactor

This study involves the development of novel mesoporous Zr-MCM-48 photocatalyst impregnated with Cu-porphyrin (CuTPP) having Si/Zr ratio of 100, 50 and 25. The synthesized materials were applied as hybrid photocatalyst affording mid-gap energy states and Zi 3+ sites for reduction of CO 2 into methan...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2021-09, Vol.32 (17), p.22060-22075
Main Authors: Nadeem, Saad, Mumtaz, Asad, Alnarabiji, Mohamad Sahban, Mutalib, Mohamed Ibrahim Abdul, Abdullah, Bawadi
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysts
Catalytic activity
Characterization and Evaluation of Materials
Chemistry and Materials Science
Light irradiation
Luminous intensity
Materials Science
Methanol
Optical and Electronic Materials
Photocatalysis
Photocatalysts
Porphyrins
Silicon dioxide
Slurry reactors
Sodium sulfite
Zirconium
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Summary:This study involves the development of novel mesoporous Zr-MCM-48 photocatalyst impregnated with Cu-porphyrin (CuTPP) having Si/Zr ratio of 100, 50 and 25. The synthesized materials were applied as hybrid photocatalyst affording mid-gap energy states and Zi 3+ sites for reduction of CO 2 into methanol selectively using UV–Visible light treatment. Interestingly, Zr-MCM-48 displayed significant photocatalytic reduction ability under UV–Vis wavelength. The bare Zr-based MCM-48(25) matrix with maximum Zr content in catalyst enhanced the photocatalytic activity with 47.5 µmol methanol formation, possessing high surface area S BET of 1324 m 2  g −1 , under UV–Visible light irradiation. The characterization results highlighted the influence of visible light active Cu-porphyrin interaction over Zr-MCM-48 silica frameworks due to transition of electrons from the porphyrin centres to the active Zr sites as evident from DRS analysis. Moreover, the impregnation of Cu-porphyrin over Zr-MCM-48(25) displayed methanol formation about 365.11 µmol under UV–Visible light using 0.1 M NaOH and 0.1 M Na 2 SO 3 . Also, the effect of varying reaction conditions shown that catalyst concentration, metal loading, light intensity and stirring speed pronouncedly impact the formation of methanol.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-06676-x