A1 Journal article (refereed)
Designed synthesis of perylene diimide-based supramolecular heterojunction with g-C3N4@MIL-125(Ti) : insight into photocatalytic performance and mechanism (2021)
Fakhri, H., Farzadkia, M., Srivastava, V., & Sillanpää, M. (2021). Designed synthesis of perylene diimide-based supramolecular heterojunction with g-C3N4@MIL-125(Ti) : insight into photocatalytic performance and mechanism. Journal of Materials Science: Materials in Electronics, 32(1), 19-32. https://doi.org/10.1007/s10854-020-04311-9
JYU authors or editors
Publication details
All authors or editors: Fakhri, Hanieh; Farzadkia, Mahdi; Srivastava, Varsha; Sillanpää, Mika
Journal or series: Journal of Materials Science: Materials in Electronics
ISSN: 0957-4522
eISSN: 1573-482X
Publication year: 2021
Publication date: 04/01/2021
Volume: 32
Issue number: 1
Pages range: 19-32
Publisher: Springer
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1007/s10854-020-04311-9
Publication open access: Not open
Publication channel open access:
Abstract
A new supramolecular semiconductor perylene diimide (PDI)-functionalized g-C3N4@MIL-125(Ti) (is nominated as PC@MIL-125(Ti)) was prepared through in situ growth of MIL-125(Ti) on PDI-functionalized g-C3N4 (PC) sheets. This heterojunction was used for photodegradation of methyl orange (MO) pollutants under visible light illumination. This process was sensitive to the pH of solution, dosage of PC and the presence of the various scavengers. The 30PC@MIL-125(Ti) as optimum photocatalyst indicated synergistic effects on photodegradation of MO, where the maximum photocatalytic efficiency was obtained 100% under 90 min irradiation that was higher than pure PC and MIL-125(Ti). Herein, the PDI component acts as a powerful light harvester and improves absorption of visible light where PC@MIL-125(Ti) has a lower bandgap than g-C3N4@MIL-125(Ti). Moreover, proper contact between PDI and g-C3N4 sheets constructs the highway for easy and fast electron transfer that verified by photoluminescence analysis. The sum of these factors resulted in the superior photocatalytic ability of this heterojunction, where the TOC analysis confirmed 91% mineralization for MO. Besides, according to the results of LC-MASS analysis, the azo cleavage and dealkylation were main photodegradation pathways. By considering superior photocatalytic performance of this heterojunction, this work can be a guideline for the development of PDI-based supramolecular organic–inorganic photocatalyst.
Keywords: coordination complexes; organometallic compounds; supramolecular chemistry; catalysts; photochemistry; photocatalysis; environmental chemistry; waste water treatment; harmful substances
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 1