Advances in Photocatalysis for Environmental Pollutant Removal

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Environmental Separations".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 457

Special Issue Editor

College of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, China
Interests: environmental chemistry; new environmental functional materials

Special Issue Information

Dear Colleagues,

Photocatalytic technology provides promising solutions to the increasingly severe environmental challenges seen across the globe. Developing photocatalysts that meet these needs is crucial. In the past decade, various materials, including inorganic semiconductors and organic semiconductors, have been explored for use in photocatalytic applications. In recent years, organic semiconductor photocatalysts have received widespread attention due to the ease of regulating their structure and function through molecular design. These organic photocatalysts include carbon nitrides, covalent organic frameworks, polymers, triazine-based frameworks, and conjugated materials, as well as their hybrids and composites. This Special Issue aims to emphasize the structural regulation and performance optimization of these materials as photocatalysts and demonstrate their wide range of applications in environmental remediation. We are pleased invite you to submit research articles and reviews that focus on recent experimental and theoretical results related to the preparation, structure–property characterization, and application of photocatalysts in the environment, and hope to create a good reference for further research and the development of photocatalytic technology.

Dr. Feigao Xu
Guest Editor

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Keywords

  • photocatalysts
  • semiconductors
  • microstructure regulation
  • environmental pollutants
  • degradation
  • Fenton

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Published Papers (1 paper)

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Research

16 pages, 4992 KiB  
Article
Degradation of Acid Orange II by FeOCl/Biochar-Catalyzed Heterogeneous Fenton Oxidation
by Jiren Yuan, Dongao Xie, Dan Li and Feigao Xu
Separations 2025, 12(4), 101; https://doi.org/10.3390/separations12040101 - 21 Apr 2025
Viewed by 244
Abstract
In recent years, the rapid development of industry has led to the discharge of large quantities of pollutants, including harmful dyes, into water sources, thereby posing potential threats to human health and the environment. FeOCl and biochar have their own shortcomings as a [...] Read more.
In recent years, the rapid development of industry has led to the discharge of large quantities of pollutants, including harmful dyes, into water sources, thereby posing potential threats to human health and the environment. FeOCl and biochar have their own shortcomings as a mediator in the heterogeneous Fenton process. To make both materials useful, FeOCl supported on bamboo biochar (FeOCl/BC) was prepared by calcination using FeCl3·6H2O and bamboo powder as raw materials, and the composite’s catalytic activities were explored with acid orange II (AO-II) as the target pollutant. The degradation efficiency of FeOCl/BC composites on AO-II was determined by testing the mass ratio of FeOCl and BC, initial pH, temperature, H2O2 concentration, catalyst addition, addition of coexisting inorganic anions, and natural organic matter. The addition of biochar to FeOCl increased the activation of H2O2 to generate •OH for the removal of AO-II and accelerated the cycle of Fe3+/Fe2+. The removal rate of AO-II by the Fe1C0.2 composite was 97.1% when the mass ratio of FeOCl and BC was 1:0.2 (Fe1C0.2), which was higher than that of the pure components (FeOCl or BC) at pH = 6.1. Moreover, after five reuses, the Fe1C0.2 composite still showed high degradation activity for AO-II, with 83.3% degradation and low activity loss. The capture experiments on the active material showed that the removal of AO-II by the Fe1C0.2 composite was mainly dominated by •OH; however, •O2 and h+ played minor roles. The synthesized Fe1C0.2 composite could be applied for organic contaminants such as AO-II with high removal efficiency. Full article
(This article belongs to the Special Issue Advances in Photocatalysis for Environmental Pollutant Removal)
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