Journal
NANO ENERGY
Volume 48, Issue -, Pages 361-368Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2018.03.079
Keywords
Nanostructured solar-energy materials; Pyrite/CNT energy diagram; Hole-scavenger-free ammonia photosynthesis; H-based solar-fuels; Water photosplitting; CNT energy harnessing power
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Funding
- research council of IASBS [G2017IASBS32603]
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Through a facile solvothermal route, pyrite (FeS2) semiconductor nanoparticles were synthesized in the absence and presence of carbon nanotube (CNT), and employed as effective, narrow-bandgap, hole-scavenger-free, photocatalyst/solar-energy materials in a water photosplitting setup, to convert N-2 molecules into ammonia - a modern/green H-based fuel and agriculturally important chemical. The investigations revealed that the presence of CNT substantially enhances the photocatalyst activity. The superiority of FeS2/CNT nanocomposite energy material was explained in detail in terms of the ability of CNT to increase the photocatalyst surface area and interact with more N-2 molecules, boost the absorption of photons and effectually harvest the incident light, retard the recombination of e/h pairs, decrease the system impedance and facilitate the charge transfer process. Based on water-oxidation and proton reduction phenomena occurring upon the photocatalyst surface, the N-2-photofixation process was also interpreted from mechanistic/photoelectrochemical/energetic perspective.
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