Photofixation of N 2 to ammonia utilizing Ni@TPP-HPA nanocomposite under visible-light illumination.

Autor: Rostami S; Department of Chemistry, School of Sciences, Hakim Sabzevari University Sabzevar Iran rtayebee@hsu.ac.ir., Tayebee R; Department of Chemistry, School of Sciences, Hakim Sabzevari University Sabzevar Iran rtayebee@hsu.ac.ir., Mahdavi B; Department of Chemistry, School of Sciences, Hakim Sabzevari University Sabzevar Iran rtayebee@hsu.ac.ir.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2023 Oct 26; Vol. 13 (45), pp. 31303-31313. Date of Electronic Publication: 2023 Oct 26 (Print Publication: 2023).
DOI: 10.1039/d3ra03921h
Abstrakt: The production of ammonia as an important raw material in the chemical, agricultural, and food industries has been always a significant concern. However, conventional ammonia production methods require high energy consumption and costs. The photocatalytic rotes use green light sources and cost-effective photocatalysts to obtain ammonia from water under aerobic conditions and preventing production of greenhouse gases in the environment. To produce an effective heterogeneous catalyst, a new tetraphenylporphyrin-heteropolyacid (TPP-HPA) nanohybrid material is synthesized and loaded onto Ni nanoparticles in this work. Then, FE-SEM, EDS, XRD, and FT-IR analyses were applied to characterize the prepared nanohybrid material Ni@TPP-HPA. After that, the new inorganic-organic nanohybrid photocatalyst was introduced as an effective, environmental friendly, and recyclable mediator for N 2 photofixation. The results showed that Ni@TPP-HPA is a good photocatalyst for the N 2 fixation reaction and can be easily recycled without losing its activity for at least five runs. The Ni@TPP-HPA nanocomposite demonstrated the maximum ammonia generation by 2760 μmol L -1 g -1 under mild conditions when using methanol as a hole scavenger. Additionally, effects of solvent type, temperature, reaction time, irradiation source, solution pH, and other electron scavengers on the rate of NH 4 + production were investigated and discussed.
Competing Interests: On behalf of all authors, the corresponding author states that there is no conflict of interest.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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