A porphyrin-based metal organic framework for high rate photoreduction of CO2 to CH4 in gas phase. (December 2016)

• Record Type: Journal Article
• Authors: Sadeghi, N.; Sharifnia, S.; Sheikh Arabi, M.
• Is Part Of: Journal of CO₂ utilization. Volume 16(2016)
• Page Start: 450
• Page End: 457
• Publication Date: 2016-12
• Subjects: Photocatalyst -- Metal organic framework -- CO2 photoreduction -- Methane; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2016.10.006
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: Porphyrin metal organic framework (Zn/PMOF) was prepared using tetrakis porphyrin. The CO2 photoreduction was carried out over Zn/PMOF in the presence of H2 O vapor. The Zn/PMOF activity was 80.6% greater than bare ZnO under same reaction condition. The reusability of Zn/PMOF was showed no significant losses even after three cycles. Deactivation of the photocatalyst and the mechanism of the reaction were determined. Abstract: In the current study, porphyrin-based metal organic framework (Zn/PMOF) was prepared using tetrakis (4-carboxy phenyl) porphyrin (TCPP) as ligand and characterized by different spectra analyses. The FESEM and EDX measurements revealed the successful formation of a Zn/PMOF. The CO2 photoreduction experiments were carried out over Zn/PMOF in the presence of H2 O vapor as photocatalyst and sacrificial electron donor, respectively, under UV/Visible light. The reaction products results showed that 10.43 μmol CH4 was produced over Zn/PMOF during the 4 h photocatalytic reaction under UV/Visible illumination where is 80.6% greater than bare ZnO under the same reaction condition. The stability and reusability of Zn/PMOF were investigated via recycling test and there were not significant losses of photocatalytic activities even after three cycles. In addition, UV–vis spectra and FTIR measurement showed no significant changes in photocatalyst structure. Finally, deactivation of the photocatalyst and the mechanism of the reaction were determined.