Designed synthesis of perylene diimide-based supramolecular heterojunction with g-3N4@MIL125(Ti): insight into photocatalytic performance and mechanism

Article

Fakhri, Hanieh, Farzadkia, Mahdi, Srivastava, Varsha and Sillanpää, Mika. 2021. "Designed synthesis of perylene diimide-based supramolecular heterojunction with g-3N4@MIL125(Ti): insight into photocatalytic performance and mechanism." Journal of Materials Science: Materials in Electronics. 32 (1), pp. 19-32. https://doi.org/10.1007/s10854-020-04311-9
Article Title

Designed synthesis of perylene diimide-based supramolecular heterojunction with g-3N4@MIL125(Ti): insight into photocatalytic performance and mechanism

ERA Journal ID1106
Article CategoryArticle
AuthorsFakhri, Hanieh, Farzadkia, Mahdi, Srivastava, Varsha and Sillanpää, Mika
Journal TitleJournal of Materials Science: Materials in Electronics
Journal Citation32 (1), pp. 19-32
Number of Pages14
Year2021
PublisherSpringer
Place of PublicationUnited States
ISSN0957-4522
1573-482X
Digital Object Identifier (DOI)https://doi.org/10.1007/s10854-020-04311-9
Web Address (URL)https://link.springer.com/article/10.1007/s10854-020-04311-9
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.

KeywordsFast electron transfer; Perylenediimides; Photo-catalytic; Photocatalytic efficiency; Synergistic effect
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020401602. Composite and hybrid materials
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Byline AffiliationsIran University of Medical Sciences, Iran
University of Jyvaskyla, Finland
Duy Tan University, Vietnam
School of Engineering
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