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Water
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Innovative Nanomaterials and Surfaces for Water Treatment
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Innovative Nanomaterials and Surfaces for Water Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 20 October 2024 | Viewed by 616

Special Issue Editors

Dr. Chiara Lo Porto

E-Mail Website
Guest Editor
Department of Civil, Environmental, Land, Construction and Chemistry, Polytechnic University of Bari, Bari, Italy
Interests: photocatalysis; pollutant degradation; nanomaterials; water splitting; disinfection; chemistry; plasma
Special Issues, Collections and Topics in MDPI journals
Dr. Vincenza Armenise

E-Mail Website
Guest Editor
Department of Chemistry, University of Bari Aldo Moro, Bari, Italy
Interests: innovative materials; characterization techniques; chemistry; plasma processes; environmental field

Special Issue Information

Dear Colleagues,

Water treatment technologies are a key subject for the scientific community due to increasing pollution and the scarcity of clean drinkable water. The fast growth of industries and lifestyle changes have led to a need for innovative materials to alleviate this worldwide problem. Materials intended for use as nanoparticles for the photocatalytic degradation of organic pollutants and water disinfection are constantly being upgraded to achieve higher efficiency and photoactivity in the solar range by means of defect induction, heterohunctions, doping, or sensitazion. Membranes and adsorbers for pollutants and heavy metal removal deeply rely on engineered surfaces, specific chemical functionalities, and the use of nanomaterials.

This Special Issue aims to collate recent research on the subject discussed above by adopting a multidisciplinary approach to contribute to the scientific progress in this field.

Dr. Chiara Lo Porto
Dr. Vincenza Armenise
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanomaterials
  • surfaces
  • photocatalysis
  • pollutant degradation
  • heavy metal removal
  • adsorbers
  • membranes

Published Papers (1 paper)

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Research

23 pages, 17926 KiB  
Article
Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation
by Najah Ayad Alshammari, Samia Abdulhammed Kosa, Rajan Patel and Maqsood Ahmad Malik
Water 2024, 16(10), 1334; https://doi.org/10.3390/w16101334 - 8 May 2024
Viewed by 417
Abstract
Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2 [...] Read more.
Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2O3 and CeO2 nanoparticles, was synthesized using a combination of hexadecyltrimethylammonium bromide (CATB) and ascorbic acid via the hydrothermal method. To tune the band gap, the heterojunction nanocomposite of α-Fe2O3-CeO2 was decorated with plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, and PL, were used to determine the properties of the materials, including their morphology, elemental composition, optical properties, band gap energy, and crystalline phase. The nanocomposite of α-Fe2O3-CeO2@Au was utilized to remove Rose Bengal (RB) dye from wastewater using a photocatalytic technique when exposed to visible light. A comprehensive investigation of the impact of the catalyst concentration and initial dye concentration was conducted to establish the optimal photodegradation conditions. The maximum photocatalytic efficiency of α-Fe2O3-CeO2@Au (50 mg L−1) for RB (20 ppm) dye removal was found to be 88.9% in 120 min under visible-light irradiation at a neutral pH of 7 and 30 °C. Various scavengers, such as benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; 0.5 mM), and ethylenediaminetetraacetic acid (EDTA; 0.5 mM), were used to investigate the effects of different free radicals on the photocatalytic process. Furthermore, the reusability of the α-Fe2O3-CeO2@Au photocatalyst has also been explored. Furthermore, the investigation of the potential mechanism demonstrated that the heterojunction formed between α-Fe2O3 and CeO2, in combination with the presence of deposited Au NPs, led to an enhanced photocatalytic efficiency by effectively separating the photogenerated electron (e−)–hole (h+) pairs. Full article
(This article belongs to the Special Issue Innovative Nanomaterials and Surfaces for Water Treatment)
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