Full-spectrum photocatalytic treatment and in situ upcycling of organophosphorus wastewater enabled by biomimetic urchin-like Bi2S3/CdS

Tengyu Liu, Jinshu Huang, Zhuochun Huang, Qizhi Luo, Hongguo Wu, Ye Meng, Chao He, Hu Li

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

High-efficiency photo-degradation organophosphorus pollutants into value-added chemicals, reducing or avoiding CO2 emission, is challenging but significant for environmental protection and carbon neutrality. Herein, a novel biomimetic urchin-like Bi2S3/CdS (BCS-UL) photocatalyst with full spectral response was developed for thorough degradation of glyphosate (Gly) and in situ upcycling into CO (731 μmol g-1h−1). Control experiments, finite element simulations, and theoretical calculations corroborated that Z-scheme heterojunction BCS-UL achieved highly photothermal/pyroelectric properties by multiple scattering and reflection of near-infrared light among spines of Bi2S3 component, which could promote the transfer of electron-hole pairs and regulate the selective formation of reactive oxygen species •O2. The active center CdS component promoted C-P bond activation of Gly, which was more susceptible to being converted into sarcosine and further to CO by nucleophilic attack with •O2 and oxidation with h+. The decomposition pathways of Gly and acute toxicity of the intermediates were analyzed with LC-MS, Fukui index, and theoretical calculation. Moreover, BCS-UL was applicable for the efficient degradation of Gly at low concentrations over a wide pH range and could be recycled at least 5 times with no evident decline in catalytic activity. The biomimetic manufacturing technology provides a new avenue for implementing synchronously high-performance photocatalytic treatment and oriented upcycling of organic pollutants.

Original languageEnglish
Article number150209
JournalChemical Engineering Journal
Volume486
DOIs
Publication statusPublished - 15 Apr 2024
Publication typeA1 Journal article-refereed

Keywords

  • Biomimetics
  • Finite element simulations
  • Full-spectrum photocatalysis
  • Photothermal/pyroelectric effect
  • Wastewater remediation

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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