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Understanding Graphitic Carbon Nitride as Photocatalyst: A Case Study on Thermal Engineering of Physical and Chemical Features
Faculty of Physics, Semnan University, P.O. Box: 35195-363, Semnan, Iran.ORCID iD: 0000-0002-7585-1876
Faculty of Physics, Semnan University, P.O. Box: 35195-363, Semnan, Iran.
Faculty of Physics, Semnan University, P.O. Box: 35195-363, Semnan, Iran.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-7475-6394
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2024 (English)In: Physica Status Solidi (a) applications and materials science, ISSN 1862-6300, E-ISSN 1862-6319, Vol. 221, no 7, article id 2300844Article in journal (Refereed) Published
Abstract [en]

Rationalizing material features according to the adopted synthetic strategy, aiming then to tune them on demand, is among the most relevant purposes of investigation in materials science. Herein, the systematic analysis of the dependence of graphitic carbon nitride (g-C3N4) physical characteristics on the decomposition temperature of urea, rationalizing the impact of synthetic temperature on several characteristics of the materials (degree of N–H condensation, carbon vs nitrogen content, structural parameters, photoluminescence lifetime, surface area, pores volume), is discussed. g-C3N4 nanostructures are fabricated by thermal decomposition of urea at different temperatures under ambient atmosphere, obtaining an almost ideal stoichiometry (C/N = 0.72) when setting the temperature at 600 °C. The samples show structural, textural, compositional, and optical differences directly depending on the fabrication temperature: specific surface area, pore volume and size, intralayer distance, and speed of radiative recombination of photogenerated charges are proportionally enhanced by increasing the synthesis temperature. The role played by all the physicochemical features of the prepared samples in promoting the catalytic degradation of Rhodamine B is investigated, highlighting their synergistic role in enhancing the catalytic efficiency. Significant differences in the dye degradation are recorded when using either UV or solar simulated light, demonstrating that Rhodamine B photosensitization rules the process.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024. Vol. 221, no 7, article id 2300844
Keywords [en]
g-C3N4, intralayer distance, photocatalysis, photoluminescence lifetime, urea thermal decomposition
National Category
Physical Chemistry Materials Chemistry
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-104513DOI: 10.1002/pssa.202300844Scopus ID: 2-s2.0-85185129668OAI: oai:DiVA.org:ltu-104513DiVA, id: diva2:1843079
Note

Validerad;2024;Nivå 2;2024-04-23 (joosat);

Full text license: CC BY-NC-ND

Available from: 2024-03-07 Created: 2024-03-07 Last updated: 2024-04-23Bibliographically approved

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You, SujieConcina, Isabella

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