Special Issue "Design and Synthesis of Nanostructured Materials for Catalytic Applications"

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

Deadline for manuscript submissions: 30 June 2021.

Special Issue Editor

Prof. Dr. Kyungsu Na
Website
Guest Editor
Chonnam National University, Gwangju, South Korea
Interests: nanoporous materials; zeolites; metal oxides; metal nanoparticles; metal-organic framework; C1 chemistry; CO2 conversion; H2 production; heterogeneous catalysis
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Special Issue Information

Dear Colleagues,

Nanostructured materials have been attracting a great deal of attention in chemical industries due to their fascinating features, which originate from the nano effect. The development of nanotechnology in recent decades has enabled the design and systematic synthesis of various nanostructured materials, which have afforded new opportunities in many applications, including catalysis, electronics, optics, mechanics, the environment, energies, automobiles, and even healthcare. Nanostructured materials outperform their classical bulk-structured competitors by virtue of their unique chemical, physical, electrical, and mechanical characteristics, and their outstanding tunability. The catalytic opportunities for nanostructured materials are the focus of this Special Issue, which aims to cover the design of various nanostructured materials, such as metal nanoparticles, nanoporous crystals (i.e., metal oxides, zeolites, and metal–organic frameworks), and nanoporous carbons, for application in heterogeneous catalysis to control chemical reactions. We welcome the submission of communications, original research papers, and reviews on the following, or related, topics:

  • developments in the design and synthesis of nanostructured catalytic materials;
  • control of the size, shape, and components of metal nanoparticles for catalytic applications;
  • synthesis of crystalline nanoporous materials;
  • nanostructured materials for heterogeneous catalysis, including thermochemical, electrochemical, and photochemical reactions; and
  • theoretical studies on the design of nanostructured materials and prediction of their abilities.

Prof. Dr. Kyungsu Na
Guest Editor

Manuscript Submission Information

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Keywords

  • metal nanoparticles
  • nanoporous metal oxides
  • zeolites
  • metal–organic frameworks
  • nanoporous carbons
  • heterogeneous catalysts.

Published Papers (4 papers)

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Research

Open AccessFeature PaperArticle
Biobased Carbon Dots: From Fish Scales to Photocatalysis
Nanomaterials 2021, 11(2), 524; https://doi.org/10.3390/nano11020524 - 18 Feb 2021
Abstract
The synthesis, characterization and photoreduction ability of a new class of carbon dots made from fish scales is here described. Fish scales are a waste material that contains mainly chitin, one of the most abundant natural biopolymers, and collagen. These components make the [...] Read more.
The synthesis, characterization and photoreduction ability of a new class of carbon dots made from fish scales is here described. Fish scales are a waste material that contains mainly chitin, one of the most abundant natural biopolymers, and collagen. These components make the scales rich, not only in carbon, hydrogen and oxygen, but also in nitrogen. These self-nitrogen-doped carbonaceous nanostructured photocatalyst were synthesized from fish scales by a hydrothermal method in the absence of any other reagents. The morphology, structure and optical properties of these materials were investigated. Their photocatalytic activity was compared with the one of conventional nitrogen-doped carbon dots made from citric acid and diethylenetriamine in the photoreduction reaction of methyl viologen. Full article
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Open AccessEditor’s ChoiceArticle
Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts
Nanomaterials 2021, 11(2), 362; https://doi.org/10.3390/nano11020362 - 01 Feb 2021
Abstract
To obtain selective hydrogenation catalysts with low noble metal content, two carbon-supported Mo-Pt bimetallic catalysts have been synthesized from two different molybdenum precursors, i.e., Na2MoO4 and (NH4)6Mo7O24. The results obtained by X-ray [...] Read more.
To obtain selective hydrogenation catalysts with low noble metal content, two carbon-supported Mo-Pt bimetallic catalysts have been synthesized from two different molybdenum precursors, i.e., Na2MoO4 and (NH4)6Mo7O24. The results obtained by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) combined with the presence and strength of acid sites clarified the different catalytic behavior toward cinnamaldehyde hydrogenation. After impregnating the carbon support with Mo precursors, each sample was used either as is or treated at 400 °C in N2 flow, as support for Pt nanoparticles (NPs). The heating treatment before Pt deposition had a positive effect on the catalytic performance. Indeed, TEM analyses showed very homogeneously dispersed Pt NPs only when they were deposited on the heat-treated Mo/C supports, and XPS analyses revealed an increase in both the exposure and reduction of Pt, which was probably tuned by different MoO3/MoO2 ratios. Moreover, the different acid properties of the catalysts resulted in different selectivity. Full article
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Open AccessArticle
Surface Properties of 1DTiO2 Microrods Modified with Copper (Cu) and Nanocavities
Nanomaterials 2021, 11(2), 324; https://doi.org/10.3390/nano11020324 - 27 Jan 2021
Abstract
This work deals with Cu-modified 1DTiO2 microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO2, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from 500 to 950 °C. The microstructure of all [...] Read more.
This work deals with Cu-modified 1DTiO2 microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO2, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from 500 to 950 °C. The microstructure of all samples was characterized by electron microscopy (SEM/EDS and HRTEM/SAED), X-ray powder diffraction (XRD), infrared spectroscopy, simultaneous DTA/TGA thermoanalytical measurement, and mass spectroscopy (MS). Special attention was paid to the surface structure and porosity. The 1D morphology of all annealed samples was preserved, but their surface roughness varied due to anatase-rutile phase transformation and the change of the nanocrystals habits due to nanocavities formation after releasing of confined ice-water. The introduction of 2 wt.% Cu as electronically active second species significantly reduced the direct bandgap of 1DTiO2 in comparison with undoped TiO2 and the standard Degussa TiO2_P25. All samples were tested for their UV absorption properties and H2 generation by PEC water splitting. We presented a detailed study on the surface characteristics of Cu doped 1DTiO2 MRs due to gain a better idea of their photocatalytic activity. Full article
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Open AccessArticle
Highly Efficient Mesoporous Core-Shell Structured [email protected]2 Nanosphere as an Environmentally Friendly Catalyst for Hydrogenation of Nitrobenzene
Nanomaterials 2020, 10(5), 883; https://doi.org/10.3390/nano10050883 - 03 May 2020
Cited by 2
Abstract
The size-uniformed mesoporous [email protected]2 nanospheres’ catalysts were prepared in one-pot step via reducing AgNO3 by different types of aldehyde, which could control the size of [email protected]2 NPs and exhibit excellent catalytic activity for the hydrogenation of nitrobenzene. The results showed [...] Read more.
The size-uniformed mesoporous [email protected]2 nanospheres’ catalysts were prepared in one-pot step via reducing AgNO3 by different types of aldehyde, which could control the size of [email protected]2 NPs and exhibit excellent catalytic activity for the hydrogenation of nitrobenzene. The results showed that the Ag core size, monitored by different aldehydes with different reducing abilities, together with the ideal monodisperse core-shell mesoporous structure, was quite important to affect its superior catalytic performances. Moreover, the stability of Ag fixed in the core during reaction for 6 h under 2.0 MPa, 140 °C made this type of [email protected]2 catalyst separable and environmentally friendly compared with those conventional homogeneous catalysts and metal NPs catalysts. The best catalyst with smaller Ag cores was prepared by strong reducing agents such as CH2O. The conversion of nitrobenzene can reach 99.9%, the selectivity was 100% and the catalyst maintained its activity after several cycles, and thus, it is a useful novel candidate for the production of aniline. Full article
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