Special Issue "Nanostructured Catalysts for Sustainable Applications"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 31 October 2019.

Special Issue Editors

Guest Editor
Dr. Marcelo E. Domine Website 1 Website 2 E-Mail
Instituto de Tecnología Química (UPV - CSIC). Universitat Politècnica de València. Consejo Superior de Investigaciones Científicas. Valencia, Spain
Interests: synthesis and characterization of multi-functional and nanostructured solid catalysts; catalysts application in sustainable chemical processes; biomass-derivatives transformations; wastes valorization into fuels and chemicals
Guest Editor
Prof. Alberto Marinas Website 1 Website 2 E-Mail
Departamento de Química Orgánica, Universidad de Córdoba (UCO), Córdoba, Spain
Interests: heterogeneous (photo) catalysis applied to sustainable chemistry; biomass valorization; materials science; fine chemistry

Special Issue Information

Dear Colleagues,

Different nano-structured solid materials with well-defined micro-, meso-, and hierarchical porosity and controlled catalytic properties (acid/base, redox) are capable of catalyzing a wide range of chemical reactions (e.g., oxidations, reductions, acid/base processes, etherifications, condensations, etc.) in the liquid and gas phases, interesting for the industrial production of chemicals, fuels, energy and energy vectors. The presence of isolated metallic species, homogeneously distributed in the form of nanoparticles on specific acid/base supports or adequately incorporated in the inorganic framework of well-structured materials, provides multi-functional capacities to afford catalytic transformations and multi-step reactions in “one-pot” or “cascade-type” processes, thus reducing reaction steps and operations costs and making processes more efficient and sustainable.

This Special Issue welcomes contributions devoted to the design, characterization, and application of novel nano-structured catalysts for sustainable chemical processes, mainly those focussed on the production of renewable energy and fuels or those related to the transformation of renewable raw materials, such as biomass and its derivatives into valuable products.

Dr. Marcelo E. Domine
Prof. Alberto Marinas
Guest Editors

Manuscript Submission Information

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Keywords

  • Nanomaterials
  • Nanostructured catalysts
  • Heterogeneous catalysis
  • Sustainable catalytic processes
  • Renewable chemicals
  • Renewable energy

Published Papers (3 papers)

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Research

Open AccessArticle
Influence of Boron, Tungsten and Molybdenum Modifiers on Zirconia Based Pt Catalyst for Glycerol Valorization
Nanomaterials 2019, 9(4), 509; https://doi.org/10.3390/nano9040509 - 02 Apr 2019
Abstract
The influence of boron, tungsten and molybdenum modifiers on zirconia-based Pt catalyst was studied for glycerol valorization. Zirconia modified supports were prepared by impregnation of ZrO2 with either boric, silicontungstic or phosphomolybdic acids to obtain supports with enhanced Brönsted acidic properties. The [...] Read more.
The influence of boron, tungsten and molybdenum modifiers on zirconia-based Pt catalyst was studied for glycerol valorization. Zirconia modified supports were prepared by impregnation of ZrO2 with either boric, silicontungstic or phosphomolybdic acids to obtain supports with enhanced Brönsted acidic properties. The modified supports were subsequently impregnated with chloroplatinic acid to obtain Pt-based catalysts. Pt incorporation resulted in the increase in Lewis acidity of the solids, being more significant for the Pt//W/ZrO2 catalyst. Reduced Pt catalysts were tested for the liquid-phase glycerol hydrogenolysis, observing a synergistic effect between catalyst acid sites and metal function that proved to be crucial in glycerol hydrogenolysis. The Pt//W/ZrO2 catalyst was the most active catalyst in this reaction, being the only leading to 1,3-PDO (45% sel., 160 °C) while Pt//Mo/ZrO2 is the best option for 1,2-PDO (49% sel., 180 °C). Reusability studies carried out for Pt//W/ZrO2 showed that catalytic activity dropped after the first use, remaining constant for the second and subsequent ones. Selectivity to reaction products also changes during reuses. Therefore, the selectivity to 1,2 PDO increases in the first reuse in detriment to the selectivity to n-propanol whereas the selectivity to 1,3-PDO remains constant along the uses. This behavior could be associated to the lixiviation of W species and/or catalyst fouling during reaction runs. Full article
(This article belongs to the Special Issue Nanostructured Catalysts for Sustainable Applications)
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Open AccessArticle
Engineering Charge Transfer Characteristics in Hierarchical Cu2S QDs @ ZnO Nanoneedles with p–n Heterojunctions: Towards Highly Efficient and Recyclable Photocatalysts
Nanomaterials 2019, 9(1), 16; https://doi.org/10.3390/nano9010016 - 23 Dec 2018
Cited by 3
Abstract
Equipped with staggered gap p-n heterojunctions, a new paradigm of photocatalysts based on hierarchically structured nano-match-shaped heterojunctions (NMSHs) Cu2S quantum dots (QDs)@ZnO nanoneedles (NNs) are successfully developed via engineering the successive ionic layer adsorption and reaction (SILAR). Under UV and visible [...] Read more.
Equipped with staggered gap p-n heterojunctions, a new paradigm of photocatalysts based on hierarchically structured nano-match-shaped heterojunctions (NMSHs) Cu2S quantum dots (QDs)@ZnO nanoneedles (NNs) are successfully developed via engineering the successive ionic layer adsorption and reaction (SILAR). Under UV and visible light illumination, the photocatalytic characteristics of Cu2[email protected] heterojunctions with different loading amounts of Cu2S QDs are evaluated by the corresponding photocatalytic degradation of rhodamine B (RhB) aqueous solution. The results elaborate that the optimized samples (S3 serial specimens with six cycles of SILAR reaction) by means of tailored the band diagram exhibit appreciable improvement of photocatalytic activities among all synthesized samples, attributing to the sensitization of a proper amount of Cu2S QDs. Such developed architecture not only could form p–n junctions with ZnO nanoneedles to facilitate the separation of photo-generated carries but also interact with the surface defects of ZnO NNs to reduce the electron and hole recombination probability. Moreover, the existence of Cu2S QDs could also extend the light absorption to improve the utilization rate of sunlight. Importantly, under UV light S3 samples demonstrate the remarkably enhanced RhB degradation efficiency, which is clearly testified upon the charge transfer mechanism discussions and evaluations in the present work. Further supplementary investigations illustrate that the developed nanoscale Cu2[email protected] heterostructures also possess an excellent photo-stability during our extensive recycling photocatalytic experiments, promising for a wide range of highly efficient and sustainably recyclable photocatalysts applications. Full article
(This article belongs to the Special Issue Nanostructured Catalysts for Sustainable Applications)
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Open AccessArticle
Vacuum Thermal Treated Ni-CeO2/SBA-15 Catalyst for CO2 Methanation
Nanomaterials 2018, 8(10), 759; https://doi.org/10.3390/nano8100759 - 26 Sep 2018
Cited by 2
Abstract
Ni-CeO2/SBA-15-V catalyst was prepared by the impregnation method with vacuum thermal treatment and used for CO2 methanation reaction. Compared with Ni-CeO2/SBA-15-air catalyst with thermal treatment in air, the reduced Ni-CeO2/SBA-15-V catalyst with vacuum thermal treatment exhibited [...] Read more.
Ni-CeO2/SBA-15-V catalyst was prepared by the impregnation method with vacuum thermal treatment and used for CO2 methanation reaction. Compared with Ni-CeO2/SBA-15-air catalyst with thermal treatment in air, the reduced Ni-CeO2/SBA-15-V catalyst with vacuum thermal treatment exhibited higher Ni dispersion and smaller Ni particle size. In CO2 methanation reaction, the Ni-CeO2/SBA-15-V catalyst was more active and selective than the Ni-CeO2/SBA-15-air catalyst. The good activity and selectivity of Ni-CeO2/SBA-15-V catalyst should be due to highly dispersed Ni in contact with small CeO2 particles. Full article
(This article belongs to the Special Issue Nanostructured Catalysts for Sustainable Applications)
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