Enhancing Pollutant Mineralization through Organic-Inorganic Defect-Transit Dual S-scheme with a Robust Internal Electric Field

作者：Chen, Runlin; Lou, Hongming^*; Pang, Yuxia; Yang, Dongjie; Qiu, Xueqing

来源：Small, 2023.

DOI：10.1002/smll.202306354

• internal electric fields
• lignin
• organic-inorganic dual S-scheme heterojunction
• perylene diimide
• photocatalytic degradation

Achieving superior photomineralization of pollutants relies on a rational design of a dual S-scheme with a robust internal electric field (IEF). In this study, to tackle the low mineralization rate in type-II In2O3/In2S3(IO/IS) systems, an organic-inorganic dual S-scheme In2O3/PDI/In2S3(IO/PDI/IS) nanostructured photocatalyst is synthesized via a method combining solvent-induced self-assembly and electrostatic forces. Due to the unique energy band position and strong IEF, the photoinduced defect-transit dual S-scheme IO/PDI/IS facilitates the degradation of lignin and antibiotics. Notably, a promising mineralization rate of 80.9% for sodium lignosulfonate (SL) is achieved. The charge transport pathway of IO/PDI/IS are further validated through the analysis of in situ X-ray photoelectron spectroscopy (in situ XPS), density functional theory calculations, and radical trapping experiments. In-depth, two possible pathways for the photocatalytic degradation of lignin are proposed based on the intermediates monitored by liquid chromatography-mass spectrometry (LC-MS). This study presents a new strategy for the design of organic-inorganic dual S-scheme photocatalysts with a robust IEF for pollutant degradation. @@@ In order to address the low mineralization rate observed within type-II In2O3/In2S3 (IO/IS) systems, organic-inorganic defect-transit dual S-scheme In2O3/perylene dimides (PDI)/In2S3 (IO/PDI/IS) with a robust internal electric field is synthesized. Due to the synergistic enhancement provided by lamella PDI, the composite photocatalysts IO/PDI/IS exhibit remarkable photocatalytic degradation and mineralization abilities for antibiotics and lignin.image

• 单位
  广东工业大学