Work

Sonochemical accelerated fabrication of MgIn2S4/COFs S-scheme heterojunction for efficient photocatalytic H2O2 production

Year: 2025

Type: article

Abstract: Photocatalytic hydrogen peroxide (H 2 O 2 ) production has garnered significant research interest for its environmental benefits and sustainability. S-scheme heterostructure incorporating covalent organic frameworks (COFs) has been recognized as an effective strategy for enhancing photocatalytic H 2 O 2 performance. In this study, MgIn 2 S 4 /COFs (MIS/sonoTp-TAPB) S-scheme heterojunction were fabricated via a simple, rapid, and eco-friendly sonochemical method. High-frequency ultrasound induces cavitation effects, generating transient localized high temperatures and pressures, intense microjets, and enhanced mass transfer, effectively overcoming the limitations of conventional synthesis. This approach reduces solvent consumption, shortens reaction duration to 2 h, and ensures sufficient interface contact between MIS and sonoTp-TAPB. The as-obtained MIS/sonoTp-TAPB 0.05 heterojunction achieved a photocatalytic H 2 O 2 production rate of 1610.54 μmol·g −1 ·h −1 , 2.36 and 3.13 times higher than pristine MIS and sonoTp-TAPB, respectively. The S-scheme structure combines the redox capacity of both MIS and sonoTp-TAPB, and maintains a high H 2 O 2 yield in pure water (1198.2 μmol·g −1 ·h −1 ). This enhancement is attributed to abundant surface-active sites, broadened optical absorption, and S-scheme heterojunction between MIS and sonoTp-TAPB.

Source: Ultrasonics Sonochemistry

DOI: 10.1016/j.ultsonch.2025.107700