Progress in Photocatalytic Nanomaterials and Their Uses in Environmental Remediation and Energy Production

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (18 December 2023) | Viewed by 1530

Special Issue Editors


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Guest Editor
Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University (IAU), Dammam, Saudi Arabia
Interests: nanomaterials; nanocomposites; magnetic nanomaterials; magnetoelectric multiferroic materials; dielectric materials; semiconductors; environmental remediation; photocatalysis; energy applications; hydrogen evolution reaction; supercapacitors; batteries; superconductivity; nanotechnology; biological activity
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E-Mail Website
Guest Editor
Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
Interests: superconductivity; nanomaterials; nanocomposites; ceramics; nanotechnology; semiconductors; multiferroics; dielectric materials; energy; environmental remediation; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photocatalysis is a cost-effective, environmentally friendly, and highly exciting approach that covers different fields such as chemical engineering and physical, chemical, and biological sciences. Photocatalytic nanomaterials are being studied widely for their outstanding features in hydrogen production via water-splitting procedures, methane (CH4) gas generation via the reduction in carbon dioxide (CO2), the purification of air, the inhibition of micro-organisms, the decontamination of water, and the degradation of diverse kinds of inorganic and organic pollutants including dyes, heavy metals, drugs, pesticides, etc.

Nanostructured materials are thought to be the ideal nano-photocatalysts because of their great stability, non-toxicity, low cost, and excellent photoactivity. Oxide semiconductors such as WO3, CeO2, SnO2, TiO2, SrTiO3, ZnO, Fe2O3, etc., are among the most efficient nano-photocatalysts. This is owing to their large bandgap and significant photocatalytic activities in the visible region. Other oxide and non-oxide (like CdS, ZnS, g-C3N4, etc.) nanomaterials also showed their efficiency as photocatalysts. The structural and morphological characteristics of photocatalysts could be fine-tuned to enhance their stability, their efficacy to produce electron–hole pairs upon absorbing light, and their photocatalytic efficiency. Furthermore, the production of novel photocatalytic nanocomposites and conductive polymers with nanostructures renders these products more easily recoverable and reusable for future runs.

Because of the fascinating prospects of nano-photocatalysts, creative researches of innovative and effective catalytic devices for environmental remediation and energy applications are increasingly sought.

The current Special Issue of “Nanomaterials” will cover the recent Progress in Photocatalytic Nanomaterials and Their Uses in Environmental Remediation and Energy Production, including the preparation of innovative and enhanced nano-photocatalysts using diverse techniques, the chemical and physical characterizations of nano-photocatalysts, their promising applications in the fields of energy production and environmental remediation, other related applications (such as biological activity, solar energy-driven nano-photocatalysis, etc.), the in-depth comprehension of the photocatalysis reaction mechanisms, theoretical investigations (numerical optimization, modeling, kinetics, and cost analysis of the processes), amongst others. This Special Issue welcomes the submission of original articles, review articles, and short communications that fit with all the above-mentioned points in the summary.

Prof. Dr. Yassine Slimani
Dr. Hannechi Essia
Guest Editors

Manuscript Submission Information

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Keywords

  • photocatalytic
  • environmental remediation
  • wastewater treatment
  • CO2 reduction
  • organic pollutants
  • dye degradation
  • removal of heavy metals
  • biological activity

Published Papers (1 paper)

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Research

17 pages, 2729 KiB  
Article
Photocatalytic Degradation of Pharmaceutical Residues from Water and Sewage Effluent Using Different TiO2 Nanomaterials
by Amir Hossein Navidpour, Mohammad Boshir Ahmed and John L. Zhou
Nanomaterials 2024, 14(2), 135; https://0-doi-org.brum.beds.ac.uk/10.3390/nano14020135 - 06 Jan 2024
Viewed by 1305
Abstract
Pharmaceuticals are widely used and often discharged without metabolism into the aquatic systems. The photocatalytic degradation of pharmaceutical compounds propranolol, mebeverine, and carbamazepine was studied using different titanium dioxide nanostructures suspended in water under UV and UV-visible irradiation. Among three different photocatalysts, the [...] Read more.
Pharmaceuticals are widely used and often discharged without metabolism into the aquatic systems. The photocatalytic degradation of pharmaceutical compounds propranolol, mebeverine, and carbamazepine was studied using different titanium dioxide nanostructures suspended in water under UV and UV-visible irradiation. Among three different photocatalysts, the degradation was most effective by using Degussa P25 TiO2, followed by Hombikat UV100 and Aldrich TiO2. The photocatalytic performance was dependent on photocatalyst dosage, with an optimum concentration of 150 mg L−1. The natural aquatic colloids were shown to enhance the extent of photocatalysis, and the effect was correlated with their aromatic carbon content. In addition, the photocatalysis of pharmaceuticals was enhanced by the presence of nitrate, but inhibited by the presence of 2-propanol, indicating the importance of hydroxyl radicals. Under optimum conditions, the pharmaceuticals were rapidly degraded, with a half-life of 1.9 min, 2.1 min, and 3.2 min for propranolol, mebeverine, and carbamazepine, respectively. In treating sewage effluent samples, the photocatalytic rate constants for propranolol (0.28 min−1), mebeverine (0.21 min−1), and carbamazepine (0.15 min−1) were similar to those in water samples, demonstrating the potential of photocatalysis as a clean technology for the effective removal of pharmaceuticals from sewage effluent. Full article
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