PDI Supermolecule-Encapsulated 3D BiVO4toward Unobstructed Interfacial Charge Transfer for Enhanced Visible-Light Photocatalytic Activity

Bo Li, Sha Chen, Danlian Huang, Min Cheng, Chunyan Du, Chengyang Feng, Yang Yang, Lei Lei, Yashi Chen, Wenjing Xue, Rui Deng

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The construction of a heterojunction photocatalyst as an effective method to enhance the charge separation has attracted great attention from researchers. Herein, a novel BiVO4/self-assembled perylene diimide (BiVO4/PDIsa) organic supermolecule photocatalyst was successfully constructed via an in situ electrostatic assembling method. Various characterization methods were employed to systematically study the phase structure, morphology, and photoelectrochemical properties of BiVO4/PDIsa. Among the different ratios of composites, the 20%BiVO4/PDIsa exhibited the optimal photocatalytic activity under visible-light irradiation, and its degradation efficiency for tetracycline (TC) could reach 81.75% within 30 min. In addition, the corresponding TC degradation rate constant was 0.0545 min-1, which was 1.69 times and 3.61 times that of the pure PDIsa and BiVO4, respectively. Subsequently, the radical trapping experiments and electron spin response (ESR) test indicated that 1O2, •O2-, and h+ were the primary reactive species in the photocatalytic process. Importantly, the efficient electron migration path and photocatalytic mechanism of the catalyst were inferred by experimental study and density functional theory (DFT) calculations. In brief, this work provides a promising approach in designing an inorganic-organic Z-scheme heterojunction photocatalyst for environmental remediation.
Original languageEnglish (US)
Pages (from-to)18693-18707
Number of pages15
JournalJOURNAL OF PHYSICAL CHEMISTRY C
Volume125
Issue number34
DOIs
StatePublished - Sep 2 2021
Externally publishedYes

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