Inorganic Photocatalysts for Environmental Applications, 2nd Edition

A Special Issue of Inorganics (ISSN 2304-6740) belonging to the section "Inorganic Materials".

Deadline for manuscript submissions: 31 March 2027 | Viewed by 126

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College of Science, Health, Engineering and Education, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia
Interests: electrocatalysis; metal–organic frameworks; transition-metal oxides; energy storage materials; photocatalysis; green synthesis; functional inorganic materials
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Special Issue Information

Dear Colleagues,

Photocatalysts and their photoelectrochemical reaction mechanisms have recently gained significant attention due to growing environmental awareness. These materials are crucial in applications such as energy conversion (e.g., methanol, ethanol, and methane production) and photoreactive purification processes.

The primary reason for their importance lies in their unique catalytic properties, including surface characteristics, optical absorption, crystalline structures, specific morphologies, and oxidation-reduction capabilities. As a result, photocatalysts hold great potential for future applications, particularly through the successful design of composite catalysts that exhibit improved efficiency, selectivity, and stable catalytic activity.

Given the success of the first edition of this Special Issue, a second volume has been launched, seeking to gather original research papers and comprehensive review articles focusing on the latest advances in photocatalysts based on inorganic nanomaterials, with a focus on their use in industrial and acidic environments.

We look forward to receiving your contributions.

Dr. Guan-Ting Pan
Guest Editor

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Keywords

  • photocatalyst
  • photodegradation
  • conversion efficiency
  • environmental remediation Photoelectrochemistry
  • crystal structure
  • surface states
  • photoelectrochemical water splitting
  • photoelectrochemical CO2 reduction
  • photoelectrochemical reforming
  • photocatalytic materials for wastewater treatment and air pollution control
  • design of photoelectrochemical process and cell
  • characterization techniques on the performance of photoelectrochemical systems

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Research

19 pages, 16896 KB  
Article
Biogenic ZnO Nanoparticles Derived from Eichhornia crassipes: Synthesis and Application in the Degradation of Multiple Organic Dyes and Chlorpyrifos Ethyl
by Nelson Nagles-Vergara, Jose Alejandro Villegas-Fuentes, Alfredo Rafael Vilchis-Nestor, Yuber Palacios-Torres, Efraím A. Serna-Galvis, Jorge L. Gallego and Priscy Alfredo Luque-Morales
Inorganics 2026, 14(9), 243; https://doi.org/10.3390/inorganics14090243 (registering DOI) - 18 Sep 2026
Abstract
The green synthesis of zinc oxide (ZnO) nanoparticles using plant biomass offers a sustainable approach for developing photocatalytic materials for water treatment. In this study, ZnO nanoparticles were biosynthesized using aqueous extracts of Eichhornia crassipes from the Medio Atrato region, Chocó, Colombia, at [...] Read more.
The green synthesis of zinc oxide (ZnO) nanoparticles using plant biomass offers a sustainable approach for developing photocatalytic materials for water treatment. In this study, ZnO nanoparticles were biosynthesized using aqueous extracts of Eichhornia crassipes from the Medio Atrato region, Chocó, Colombia, at 1%, 2%, and 4% (w/v). The materials were characterized by FTIR, UV-Vis, XRD, and SEM–EDX. All samples exhibited the hexagonal wurtzite structure of ZnO without detectable secondary crystalline phases. Average crystallite sizes were 38.66, 38.16, and 31.52 nm for EC-1%, EC-2%, and EC-4%, respectively, decreasing with increasing extract concentration. Photocatalytic activity was evaluated under UV irradiation using six organic dyes: amido black 10B, eosin yellow, methylene blue, methyl orange, methyl red, and rhodamine B. Performance depended on both pollutant type and extract concentration. EC-2% showed the most consistent overall performance, achieving 87% degradation of amido black 10B, 92% of methyl orange, 81% of methyl red, and 93% of rhodamine B. Eosin yellow reached approximately 97% removal at 90 min, while EC-4% achieved 95% methylene blue degradation after 180 min. EC-2% also removed approximately 56.78% of chlorpyrifos ethyl after 180 min. Overall, E. crassipes-mediated ZnO nanoparticles demonstrate promising photocatalytic activity toward diverse organic pollutants and provide a potential route for valorizing invasive aquatic biomass. Full article
(This article belongs to the Special Issue Inorganic Photocatalysts for Environmental Applications, 2nd Edition)
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