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Molecules
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Metal-Based Nanocomposite: Synthesis and Applications
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Metal-Based Nanocomposite: Synthesis and Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 4488

Special Issue Editor

Prof. Dr. Nasser S. Awwad

E-Mail Website
Guest Editor
Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
Interests: metal-oxide-based nanocomposites application for photocatalysis; carbon nanotube−metal oxide nanocomposites; metal oxide nanomaterials and solid conductors for sensor applications; metal oxide nanocomposites and its thermal property analysis

Special Issue Information

Dear Colleagues,

The important topics to be covered in this Special Issue:

  1. Graphene-based metal and metal oxide nanocomposites;
  2. Carbon nanotube–metal-oxide nanocomposites;
  3. Metal-oxide-based nanocomposites applications for photocatalysis;
  4. Metal oxide nanomaterials and solid conductors for sensor applications;
  5. Metal oxide nanocomposites and its thermal property analysis;
  6. Semiconducting metal oxides for photocatalytic applications;
  7. Applications of metal oxide-based nanocomposites;
  8. Metal oxide-based nanocomposites applications for photoluminescence and adsorption.

Prof. Dr. Nasser S. Awwad
Guest Editor

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. Molecules 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 2700 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

  • graphene-based metal and metal oxide nanocomposites
  • carbon nanotube−metal oxide nanocomposites
  • metal oxide-based nanocomposites application towards photocatalysis
  • metal oxide nanomaterials and solid conductors for sensor applications
  • metal oxide nanocomposites and its thermal property analysis
  • semiconducting metal oxides for photocatalytic applications
  • applications of metal oxide-based nanocomposites
  • metal oxide-based nanocomposites application towards photoluminescence and adsorption

Published Papers (2 papers)

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Research

16 pages, 5272 KiB  
Article
Advanced Photoelectrochemical Hydrogen Generation by CdO-g-C3N4 in Aqueous Medium under Visible Light
by Naseer Iqbal, Muhammad Shahzeb Khan, Muhammad Zubair, Safyan Akram Khan, Asghar Ali, Naif Aldhafeeri, Saud Alsahli, Misheal Alanzi, Abdelazeez Enazi, Talal Alroyle and Abdullatif Alrashidi
Molecules 2022, 27(24), 8646; https://doi.org/10.3390/molecules27248646 - 7 Dec 2022
Cited by 6 | Viewed by 1636
Abstract
Herein, hydrothermal fabrication of CdO-g-C3N4 photocatalyst for a substantially better photocatalytic recital in water splitting is presented. The XRD analysis confirms the cubic phase of CdO-g-C3N4, whereas FTIR and UV-VIS studies revealed the presence of respective [...] Read more.
Herein, hydrothermal fabrication of CdO-g-C3N4 photocatalyst for a substantially better photocatalytic recital in water splitting is presented. The XRD analysis confirms the cubic phase of CdO-g-C3N4, whereas FTIR and UV-VIS studies revealed the presence of respective groups and a median band gap energy (2.55 eV) of the photocatalyst, respectively, which further enhanced its photo-electrochemical (PEC) properties. The SEM displays the oblong structures of g-C3N4 sheets and nano rod-like morphology of CdO and CdO-g-C3N4, respectively. The HR-TEM exhibits morphology & orientation of the grains and substantiates the polycrystal-line nature of CdO-g-C3N4 nanocomposite. The photocatalytic water-splitting concert is evaluated by PEC experiments under 1 SUN visible light irradiation. Linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) comprehend the CdO-g-C3N4 as a hydrogen evolution photocatalyst. A photocurrent density beyond ≥5 mA/cm2 is recorded from CdO-g-C3N4, which is 5–6 folds greater than pure CdO and g-C3N4. The efficient separation and transfer of charges allocated to CdO-g-C3N4 and fabricating heterojunctions between g-C3N4 and CdO suppresses the unfavorable electron-hole pairs recombination process. Thus, it recesses charge transfer resistance, augmenting enhanced photocatalytic performance under 1 SUN irradiation. Full article
(This article belongs to the Special Issue Metal-Based Nanocomposite: Synthesis and Applications)
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14 pages, 4719 KiB  
Article
Efficient Oxidation of Cyclohexane over Bulk Nickel Oxide under Mild Conditions
by Reem S. Alnefaie, Mohamed Abboud, Abdullah Alhanash and Mohamed S. Hamdy
Molecules 2022, 27(10), 3145; https://doi.org/10.3390/molecules27103145 - 14 May 2022
Cited by 3 | Viewed by 2590
Abstract
Nickel oxide powder was prepared by simple calcination of nickel nitrate hexahydrate at 500 °C for 5 h and used as a catalyst for the oxidation of cyclohexane to produce the cyclohexanone and cyclohexanol—KA oil. Molecular oxygen (O2), hydrogen peroxide (H [...] Read more.
Nickel oxide powder was prepared by simple calcination of nickel nitrate hexahydrate at 500 °C for 5 h and used as a catalyst for the oxidation of cyclohexane to produce the cyclohexanone and cyclohexanol—KA oil. Molecular oxygen (O2), hydrogen peroxide (H2O2), t-butyl hydrogen peroxide (TBHP) and meta-chloroperoxybenzoic acid (m-CPBA) were evaluated as oxidizing agents under different conditions. m-CPBA exhibited higher catalytic activity compared to other oxidants. Using 1.5 equivalent of m-CPBA as an oxygen donor agent for 24 h at 70 °C, in acetonitrile as a solvent, NiO powder showed exceptional catalytic activity for the oxidation of cyclohexane to produce KA oil. Compared to different catalytic systems reported in the literature, for the first time, about 85% of cyclohexane was converted to products, with 99% KA oil selectivity, including around 87% and 13% selectivity toward cyclohexanone and cyclohexanol, respectively. The reusability of NiO catalyst was also investigated. During four successive cycles, the conversion of cyclohexane and the selectivity toward cyclohexanone were decreased progressively to 63% and 60%, respectively, while the selectivity toward cyclohexanol was increased gradually to 40%. Full article
(This article belongs to the Special Issue Metal-Based Nanocomposite: Synthesis and Applications)
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