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Novel Advancements towards Nanocomposite Synthesis and Their Potential Application in...
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Novel Advancements towards Nanocomposite Synthesis and Their Potential Application in Photocatalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 6239

Special Issue Editors

Dr. Khalid Umar

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Guest Editor
School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia
Interests: green synthesis of hybrid nanomaterials/polymers, their characterization, and their potential applications; photocatalysis, adsorption studies, and microbial fuel technology for the removal of priority organic pollutants; wastewater treatment using synthesized graphene and metal-oxide-based composite materials; degradation of organic pollutants present in wastewater, and the identification and characterization of intermediate products formed during photooxidation processes
Dr. Olga Sacco

E-Mail Website
Guest Editor
Department of Chemistry and Biology "A.Zambelli", University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
Interests: synthesis and characterization of catalytic materials; phosphors-based nanomaterials; nanostructured photocatalysts and supports; photocatalysis for the removal of pollutants from water and wastewater; membrane separation processes
Special Issues, Collections and Topics in MDPI journals
Dr. Sadiq Umar

E-Mail Website
Guest Editor
College of Medicine, Division of Rheumatology, University of Illinois at Chicago, Chicago, IL, USA
Interests: inflammation; macrophages; fibroblast; oxidative stress; angiogenesis and rheumatoid arthritis
Special Issues, Collections and Topics in MDPI journals
Dr. Showkat Ahmad Bhawani

E-Mail Website
Guest Editor
Faculty of Resource Science and Technology, University Malaysia Sarawak, Sarawak, Malaysia
Interests: synthesis of molecular imprinting polymers for the removal/extraction of dyes, fungicides, herbicides, and various natural products from environmental and biological samples; development of new test methods and determining standard conditions for the analysis (separation, isolation, and determination) of various analytes from environmental and biological samples; analysis of samples like surfactants, amino acids, drugs, vitamins, sugars, and metal ions

Special Issue Information

Dear Colleagues,

Over the last few decades, nanoparticles became a center of researcher interest due to their special chemical and physical properties. Moreover, these nanoparticles have shown excellent performance in the field of photocatalysis. Previously, ZnO- or TiO2-based nanomaterials and iron-oxide-based nanomaterials were studied, among others. However, some novel nanocomposites such as doped metal-oxide-based nanocomposites, doped polymer nanocomposites, and graphene-based nanocomposites have recently attracted a great deal of interest due to their unique physical-chemical properties. Furthermore, several advancements have been made regarding their synthesis methods. However, more efforts are still required to improve and tailor the properties of nanocomposites; low cost as well as clean systems (e.g., green synthesis methods) should be the focus of work moving forward.

For this Special Issue, we invite investigators to submit their original research articles and reviews based on the novel achievements of these nanocomposites in the field of photocatalysis (degradation of pollutants, intermediate product studies).

Dr. Khalid Umar
Dr. Olga Sacco
Dr. Sadiq Umar
Dr. Showkat Ahmad Bhawani
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. Catalysts is an international peer-reviewed open access monthly 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 2200 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

  • Green synthesis of nanomaterials
  • Doped nanocomposites
  • Various potential applications
  • Nanoparticles surface functionalization

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Published Papers (2 papers)

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Research

27 pages, 6156 KiB  
Article
Synthesis and Analysis of In2CdO4/Y2SmSbO7 Nanocomposite for the Photocatalytic Degradation of Rhodamine B within Dye Wastewater under Visible Light Irradiation
by Jingfei Luan, Wenlu Liu, Guangmin Yang, Bowen Niu and Bingbing Ma
Catalysts 2023, 13(3), 608; https://doi.org/10.3390/catal13030608 - 17 Mar 2023
Viewed by 1290
Abstract
A new photocatalyst In2CdO4 was prepared by a solid phase sintering synthesis method at high temperature for the first time in this paper. The In2CdO4/Y2SmSbO7 heterojunction (IYH) catalyst was prepared by the solvent [...] Read more.
A new photocatalyst In2CdO4 was prepared by a solid phase sintering synthesis method at high temperature for the first time in this paper. The In2CdO4/Y2SmSbO7 heterojunction (IYH) catalyst was prepared by the solvent thermal method for the first time. The Y2SmSbO7 compound crystallized in the pyrochlore-type architecture and cubelike crystal system, and the space group of Y2SmSbO7 was Fd3m and the crystal cell parameters of Y2SmSbO7 was 9.51349 Å. The band gap width of Y2SmSbO7 was 2.63 eV. In2CdO4 crystallized with a body centered tetragonal lattice structure which was a tetragonal crystal system with a space group of I41/amd. The band gap width of In2CdO4 was 2.70 eV. After 110 minutes of visible light irradiation (VLGI-110min) with IYH as the photocatalyst, the removal rate (RR) of rhodamine B (RhB) concentration was 100% and the total organic carbon (TOC) concentration RR was 99.71%. The power mechanics invariable k toward RhB consistency and visible light irradiation (VLGI) time with IYH as the photocatalyzer reached 0.03073 min−1. The power mechanics invariable k which was involved with TOC reached 0.03621 min−1. After VLGI-110min, the RR of RhB with IYH as the photocatalyzer was 1.094, 1.174 or 1.740 times higher than that with In2CdO4, Y2SmSbO7 or N-doping TiO2 (N-TO) as the photocatalyzer, respectively. The results showed that the photocatalytic activity of IYH was the highest compared with In2CdO4, Y2SmSbO7, or N-TO. With appending a trapping agent, the oxidative capability for degrading RhB, which ranged from strong to weak among three oxidative radical groups, was as follows: hydroxyl radicals > superoxide anion > holes. This work provided a scientific basis for the research which resulted in prosperous development of efficient heterojunction compound catalysts. Full article
(This article belongs to the Special Issue Novel Advancements towards Nanocomposite Synthesis and Their Potential Application in Photocatalysis)
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16 pages, 4164 KiB  
Article
Synthesis of Atmospherically Stable Zero-Valent Iron Nanoparticles (nZVI) for the Efficient Catalytic Treatment of High-Strength Domestic Wastewater
by Afzal Ansari, Vasi Uddin Siddiqui, Md. Khursheed Akram, Weqar Ahmad Siddiqi, Anish Khan, Abeer Nasser Al-Romaizan, Mahmoud A. Hussein and Madhu Puttegowda
Catalysts 2022, 12(1), 26; https://doi.org/10.3390/catal12010026 - 27 Dec 2021
Cited by 17 | Viewed by 4234
Abstract
Here, we report the fabrication of nZVI by the wet chemical technique in the presence of ethanol using ferric iron and sodium borohydride as the reducing agents under ambient conditions. The obtained nZVI particles are mainly in a zero-valent oxidation state and do [...] Read more.
Here, we report the fabrication of nZVI by the wet chemical technique in the presence of ethanol using ferric iron and sodium borohydride as the reducing agents under ambient conditions. The obtained nZVI particles are mainly in a zero-valent oxidation state and do not undergo significant oxidation for several weeks. The structural and morphological parameters of nZVI were investigated by using UV, XRD, SEM, EDX, TEM, and DLS analysis. The optical nature, bandgap energy, and absorption edge were all revealed by the UV–visible spectrum. The phase development and crystallinity of nZVI particles were shown by the XRD pattern. The morphological investigation revealed that the nanoparticles were spherical with an average size of 34–110 nm by using ImageJ software, and the elemental analysis was analyzed using EDX. Furthermore, the catalytic treatment performance of domestic wastewater was evaluated in terms of pH, COD (chemical oxygen demand) solubilization, total solids (TS), volatile solids (VS), phosphorous, and total nitrogen (TN) reduction under aerobic and anaerobic operating conditions. The effluent was subjected to a process evaluation with a different range (100–500 mg/L) of nZVI dosages. The COD solubilization and suspended solids reduction were significantly improved in the anaerobic condition in comparison to the aerobic condition. Furthermore, the effect of nZVI on phosphorous (PO43−) reduction was enhanced by the electrons of iron ions. The high concentration of nZVI dosing has a positive impact on COD solubilization and phosphorous removal regardless of the aeration condition with 400 mg/L of nZVI dosage. Full article
(This article belongs to the Special Issue Novel Advancements towards Nanocomposite Synthesis and Their Potential Application in Photocatalysis)
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