Catalytic Applications of Nanomaterials

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Catalysis Enhanced Processes".

Deadline for manuscript submissions: closed (20 July 2023) | Viewed by 2530

Special Issue Editors


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Guest Editor
College of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: microbial contamination characteristics and risk assessment; environmental behavior and control mechanism of pollutants; environmental catalysis and microbial pollution control

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Guest Editor
School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510006, China
Interests: advanced oxidation processes; photocatalyst; photocatalytic degradation; water oxidation; CO2 reduction; hydrogen evolution

Special Issue Information

Dear Colleagues,

Nanomaterials have attracted ever-increasing attention due to their unique physicochemical properties, which are superior to those of bulk materials. When small particles enter the nanoscale, a variety of interesting properties are generated, including the surface effect, small size effect, quantum size effect and macroscopic quantum tunneling effect. These unique features endow nanomaterials with excellent mechanical, electrical, optical, thermal and chemical properties, which have found application in various aspects of catalysis, including electrocatalysis, thermal catalysis, acoustic catalysis, photocatalysis, etc. Nevertheless, challenges persist in the fields of nanomaterials design and sysnthesis, structure-property relationship and catalytic performances, as well as process optimization and catalytic mechanisms. Therefore, extensive research activities are highly necessary to bring nanomaterials catalysis into practice.

This Special Issue, “Catalytic Applications of Nanomaterials”, focuses on the latest research and development in this area. We specifically highlight the “green” and precise synthesis of nanomaterials as well as the novel concept of using nanomaterials in catalytic reactions to achieve various environmental and energy applications, such as organic pollutant degradation, water disinfection, hydrogen generation, N2 fixation, CO2 reduction, value-added chemicals synthesis, etc. Review papers providing critical overviews of state-of-the-art developments in this area are welcome. Topics of interest include, but are not limited to:

  • Nanomaterials’ design and synthesis;
  • Application of nanomaterials in electrocatalysis/photocatalysis/thermocatalysis;
  • Environmental catalysis (organic pollutants degradation, water disinfection, wastewater treatment, air pollution control, CO2 reduction, N2 fixation, etc.);
  • Energy catalysis (solar to chemical enery conversion, solar cells, hydrogen generation, value-added chemicals synthesis, etc.);
  • Catalytic process modeling and optimization;
  • Catalytic mechanisms at the molecular level;
  • Catalytic reactor design for applications;
  • Any other aspects of catalysis and nanomaterials.

Prof. Dr. Wanjun Wang
Dr. Zhuofeng Hu
Guest Editors

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Keywords

  • nanomaterials
  • electrocatalysis
  • photocatalysis
  • thermocatalysis
  • environmental application
  • energy application

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Published Papers (2 papers)

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Research

13 pages, 2957 KiB  
Article
Preparation and Characterization of Polyhedron Mn(III) Oxide/-β-Mn(IV) Oxide/Poly-o-chloroaniline Porous Nanocomposite for Electroanalytical Photon Detection
by Mohamed Rabia, Asmaa M. Elsayed and Maha Abdallah Alnuwaiser
Processes 2023, 11(8), 2375; https://doi.org/10.3390/pr11082375 - 7 Aug 2023
Cited by 8 | Viewed by 1121
Abstract
Poly-o-chloroaniline (POCA) and Mn2O3/β-MnO2/POCA porous nanocomposite are both synthesized using oxidative polymerization, with K2S2O8 and KMnO4 as oxidants, respectively. The materials are characterized to confirm their optical, morphological, crystalline, chemical, and [...] Read more.
Poly-o-chloroaniline (POCA) and Mn2O3/β-MnO2/POCA porous nanocomposite are both synthesized using oxidative polymerization, with K2S2O8 and KMnO4 as oxidants, respectively. The materials are characterized to confirm their optical, morphological, crystalline, chemical, and elemental properties. The nanocomposite exhibits superior optical properties compared to POCA. The promising optical characteristics make the nanocomposite an attractive candidate for light-sensing applications. Through electrical estimation, the nanocomposite photodetector displays the highest sensitivity between 340 and 440 nm, with Jph (current density) of 0.14 and 0.13 mA cm−2, correspondingly, and an estimated photon number of 7.461021 and 6.93 × 1021 photons/s, respectively. At 340 and 440 nm, the calculated photoresponsivity (R) values are 0.73 and 0.64 mA W−1, respectively, while the estimated detectivity (D) values are 1.64 × 108 and 1.45 × 108 Jones, respectively. These promising results indicate that the fabricated photodetector can soon potentially estimate light wavelengths and photon numbers in various industrial applications. Full article
(This article belongs to the Special Issue Catalytic Applications of Nanomaterials)
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14 pages, 2579 KiB  
Article
Interfacial Electron Transfer and Synergistic Effects on NiCo(CA)@M Microbars That Boost the Alkaline Oxygen Evolution Reaction
by Jiajia Liu, Xiao Wang, Yulin Min, Qiaoxia Li and Qunjie Xu
Processes 2023, 11(7), 1874; https://doi.org/10.3390/pr11071874 - 22 Jun 2023
Viewed by 1106
Abstract
The development of oxygen evolution reaction electrocatalysts with a low cost, high activity, and strong stability is of great significance to the breakthrough of energy conversion technology. Herein, a composite material (NiCo(CA)@M) was obtained by growing nickel-cobalt nanoparticles on MIL-88A in situ by [...] Read more.
The development of oxygen evolution reaction electrocatalysts with a low cost, high activity, and strong stability is of great significance to the breakthrough of energy conversion technology. Herein, a composite material (NiCo(CA)@M) was obtained by growing nickel-cobalt nanoparticles on MIL-88A in situ by a simple two-step solvent thermal method. The results show that NiCo(CA)@M composite has rich active sites, and the formation of the composite induces charge redistribution between NiCo(CA) and MIL-88A, effectively reducing the reaction energy barrier, while growth in situ was conducive to the improvement of material stability. Impressively, the NiCo(CA)@M catalyst achieved a current density of 10 mA cm−2 in alkaline electrolyte required an overpotential of only 270 mV and the Tafel slope was 69 mV dec−1. At the same time, the NiCo(CA)@M catalyst had excellent stability at a current density of 10 mA cm−2, and after the 16 h i-t test, the catalyst still had 91.1% current density retention. The electrocatalytic activity did not decay significantly after 2000 CV cycles. Full article
(This article belongs to the Special Issue Catalytic Applications of Nanomaterials)
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