Due to planned maintenance work on our platforms, there might be short service disruptions on Saturday, December 3rd, between 15:00 and 16:00 (CET).

Special Issue "Smart Nanomaterials for Catalytic Environment, Energy, and Sustainability"

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

Deadline for manuscript submissions: 31 March 2023 | Viewed by 4895

Special Issue Editors

Dr. Farid Orudzhev
E-Mail Website
Guest Editor
Head of Smart Materials lab, Department of Inorganic Chemisty and Chemical Ecology, Dagestan State University, Makhachkala, 367000, M. Gadzhieva St., 43 a, Dagestan, Russia
Interests: Material Characterization; Nanomaterials; Nanomaterials Synthesis; Nanoparticle Synthesis; Heterogeneous Catalysis; Thin Films; Atomic Layer Deposition; Catalyst Characterization; Nanocomposites; Photocatalysis; Nano-Catalysis; Advanced Oxidation Processes; Photodegradation; Photoelectrocatalysis; Piezocatalysis; Piezophotocatalysis
Prof. Dr. Irina A. Zvereva
E-Mail Website
Guest Editor
Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, Head of Center for Thermal Analysis and Calorimetry, Saint Petersburg State University, Universitetskiy pr. 26, 198504 Peterhof, Russia
Interests: Inorganic and Organic-inorganic Hybrid Materials; Nanomaterials; Layered structure; Perovskite-type oxide materials; Heterogeneous Catalysis; Photocatalysis; Thermal Analysis; Crystal structure; Photoactive materials; Magnetic materials; Phase Stability

Special Issue Information

Dear Colleagues,

Smart materials have become increasingly popular in recent years for solving environmental and energy problems. Smart materials are traditionally considered to be materials that can exhibit new functional properties under the influence of external factors.

The use of smart materials as catalysts allows us to design unique adaptive systems with new functional properties. Such systems can regulate their catalytic activity depending on external sources of influence both individually and in combination (pH, temperature, light, electric and magnetic fields, mechanical stress). Creating smart materials involves integrating multiple synergistic properties into a single material or device.

The development of intelligent materials therefore represents the future of material design and production and deserves deeper and more multidisciplinary research at the interface of physics and chemistry.

This Special Issue is intended to highlight the latest developments in the creation and practical application of smart materials in energy and environmental protection in order to achieve sustainable development.

We are pleased to invite you to submit a manuscript for this Special Issue. Full articles, reports, and reviews on the modeling, synthesis, properties, and results of practical applications of smart materials and devices are welcome.

Dr. Farid Orudzhev
Prof. Irina A. Zvereva
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

  • Smart materials
  • Nanomaterials
  • Multifunctional materials
  • Catalysis
  • Photocatalysis
  • Piezophotocatalysis
  • Energy harvesting
  • Hydrogen production or alternative energy
  • Solar energy
  • Piezoelectricity

Published Papers (7 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Jump to: Review

Article
Synthesis, Characterization and Photocatalytic Activity of Spherulite-like r-TiO2 in Hydrogen Evolution Reaction and Methyl Violet Photodegradation
Catalysts 2022, 12(12), 1546; https://doi.org/10.3390/catal12121546 - 01 Dec 2022
Viewed by 246
Abstract
Synthesis and characterization of spherulite-like nanocrystalline titania with rutile structure (r-TiO2) are described herein. The r-TiO2 particles were synthesized via the convenient and low-cost hydrothermal treatment of TiO(C6H6O7) titanyl citrate. The [...] Read more.
Synthesis and characterization of spherulite-like nanocrystalline titania with rutile structure (r-TiO2) are described herein. The r-TiO2 particles were synthesized via the convenient and low-cost hydrothermal treatment of TiO(C6H6O7) titanyl citrate. The r-TiO2 spherulites are micron-sized agglomerates of rod-shaped nanocrystals with characteristic sizes of 7(±2) × 43(±10) nm, oriented along (101) crystallographic direction, and separated by micropores, as revealed by SEM and TEM. PXRD and Raman spectroscopy confirmed the nanocrystalline nature of r-TiO2 crystallites. BET analysis showed a high specific surface area of 102.6 m2/g and a pore volume of 6.22 mm3/g. Photocatalytic performances of the r-TiO2 spherulites were investigated for the processes of methyl violet (MV) degradation in water and hydrogen evolution reaction (HER) in aqueous solutions of ethanol. The (MV) degradation kinetics was found to be first-order and the degradation rate coefficient is 2.38 × 10−2 min−1. The HER was performed using pure r-TiO2 spherulites and nanocomposite r-TiO2 spherulites with platinum deposited on the surface (r-TiO2/Pt). It was discovered that the r-TiO2/Pt nanocomposite has a 15-fold higher hydrogen evolution rate than pure r-TiO2; their rates are 161 and 11 nmol/min, respectively. Thus, the facile synthesis route and the high photocatalytic performances of the obtained nanomaterials make them promising for commercial use in such photocatalytic processes as organic contamination degradation and hydrogen evolution. Full article
Show Figures

Figure 1

Article
One Step Synthesis of Oxygen Defective [email protected]2TiO4/BaBi4Ti4O15 Microsheet with Efficient Photocatalytic Activity for NO Removal
Catalysts 2022, 12(11), 1455; https://doi.org/10.3390/catal12111455 - 17 Nov 2022
Viewed by 333
Abstract
Photocatalysis is an effective technology for NO removal even at low concentrations in the ambient atmosphere. However, the low efficiency of this advanced process and the tendency of producing toxic byproducts hinder the practical application of photocatalysis. To overcome these problems, the [email protected] [...] Read more.
Photocatalysis is an effective technology for NO removal even at low concentrations in the ambient atmosphere. However, the low efficiency of this advanced process and the tendency of producing toxic byproducts hinder the practical application of photocatalysis. To overcome these problems, the [email protected]2TiO4/BaBi4Ti4O15 photocatalytic composites were successfully prepared by a one-step hydrothermal method. The as-synthesized photocatalysts exhibited an efficient photocatalytic performance and generated low amounts of toxic byproducts. X-ray diffraction studies show that Bi3+ is successfully reduced on the surface of Ba2TiO4/BaBi4Ti4O15 (BT/BBT). After L-Ascorbic acid (AA) modification, the photocatalytic NO removal efficiency of [email protected]2TiO4/BaBi4Ti4O15 is increased from 25.55% to 67.88%, while the production of the toxic byproduct NO2 is reduced by 92.02%, where the initial concentration of NO is diluted to ca. 800 ppb by the gas stream and the flow rate is controlled at 301.98 mL·min−1 in a 150 mL cylindrical reactor. Furthermore, ambient humidity has little effect on the photocatalytic performance of [email protected]2TiO4/BaBi4Ti4O15, and the photocatalyst exhibits excellent reusability after repeated cleaning with deionized water. The improved photocatalytic effect is attributed to the addition of AA in BT/BBT being able to reduce Bi3+ ions to form Bi nanoparticles giving surface plasmon effect (SPR) and generate oxygen vacancies (OVs) at the same time, thereby improving the separation efficiency of photogenerated carriers, enhancing the light absorption, and increasing the specific surface areas. The present work could provide new insights into the design of high-performance photocatalysts and their potential applications in air purification, especially for NO removal. Full article
Show Figures

Graphical abstract

Article
Electrochemical Activity of Original and Infiltrated Fe-Doped Ba(Ce,Zr,Y)O3-Based Electrodes to Be Used for Protonic Ceramic Fuel Cells
Catalysts 2022, 12(11), 1421; https://doi.org/10.3390/catal12111421 - 12 Nov 2022
Viewed by 381
Abstract
Proton-ceramic fuel cells (PCFCs) are promising devices for electrochemical energy conversion purposes due to their combination of high energy efficiency, environmental friendliness, and high durability. In the present work, the polarization characteristics of promising electrodes for PCFCs based on BaFexCe0.7−x [...] Read more.
Proton-ceramic fuel cells (PCFCs) are promising devices for electrochemical energy conversion purposes due to their combination of high energy efficiency, environmental friendliness, and high durability. In the present work, the polarization characteristics of promising electrodes for PCFCs based on BaFexCe0.7−xZr0.2Y0.1O3−δ (BCZYFx) are comprehensively studied. Along with the individual BCZYFx electrodes, we investigated a method for improving their electrochemical activity by introducing nanoparticles of PrOx electrocatalysts into the porous structure of the electrode material. According to the experimental data, electroactivation allowed for the polarization resistances of the electrodes at 700 °C to be reduced from 1.16, 0.27, 0.62 Ω°cm2 to 0.09, 0.13, 0.43 Ω°cm2 for x = 0.5, 0.6, and 0.7, respectively. For a PCFC cell with an air electrode of BCZYF0.6 composition activated using PrOx nanoparticles, it was possible to achieve a maximum specific power of 300 mW cm−2 at 750 °C, which is competitive for a single cell with Co-free cathodes. The results obtained provide insight into the processes occurring in the studied electrodes after electroactivation. It is shown how the improvement of electrochemical characteristics of the electrode can be realized by a simple infiltration method in combination with a subsequent thermal treatment. Full article
Show Figures

Graphical abstract

Article
Crystal Structure and Properties of Gd1-xSrxCo1-yFeyO3-δ Oxides as Promising Materials for Catalytic and SOFC Application
Catalysts 2022, 12(11), 1344; https://doi.org/10.3390/catal12111344 - 02 Nov 2022
Viewed by 348
Abstract
A series of samples with the overall composition Gd1-xSrxCo1-yFeyO3-δ (x = 0.8; 0.9 and 0.1 ≤ y ≤ 0.9), which are promising materials for catalytic and SOFC application, was prepared by [...] Read more.
A series of samples with the overall composition Gd1-xSrxCo1-yFeyO3-δ (x = 0.8; 0.9 and 0.1 ≤ y ≤ 0.9), which are promising materials for catalytic and SOFC application, was prepared by a glycerol nitrate technique. X-ray diffraction analysis allowed to describe Gd0.2Sr0.8Co1-yFeyO3-δ with 0.1 ≤ y ≤ 0.5 in a tetragonal 2ap × 2ap × 4ap superstructure (SG I4/mmm), while oxides with 0.6 ≤ y ≤ 0.9 exhibit cubic disordered perovskite structure (SG Pm-3m). All Gd0.1Sr0.9Fe1-yCoyO3-δ oxides within the composition range 0.1 ≤ y ≤ 0.9 possess the cubic perovskite structure (SG Pm-3m). The structural parameters were refined using the Rietveld full-profile method. The changes of oxygen content in Gd1-xSrxCo1-yFeyO3-δ versus temperature were determined by thermogravimetric analysis. The introduction of iron into the cobalt sublattice leads to a gradual increase in the unit cell parameters and unit cell volume, accompanied with increasing oxygen content. The temperature dependency of conductivity for Gd0.2Sr0.8Co0.3Fe0.7O3-δ exhibits a maximum (284 S/cm) at ≈600 K in air. The positive value of the Seebeck coefficient indicates predominant p-type conductivity in the Gd0.2Sr0.8Co0.3Fe0.7O3-δ complex oxide. Full article
Show Figures

Graphical abstract

Article
The Effect of Transition Metal Substitution in the Perovskite-Type Oxides on the Physicochemical Properties and the Catalytic Performance in Diesel Soot Oxidation
Catalysts 2021, 11(10), 1256; https://doi.org/10.3390/catal11101256 - 19 Oct 2021
Cited by 2 | Viewed by 1073
Abstract
The paper is focused on the Fe for Co substitution effect on the redox and catalytic properties in the perovskite structure of GdFeO3. The solid oxides with the composition GdFe1−xCoxO3 (x = 0; 0.2; 0.5; 0.8; [...] Read more.
The paper is focused on the Fe for Co substitution effect on the redox and catalytic properties in the perovskite structure of GdFeO3. The solid oxides with the composition GdFe1−xCoxO3 (x = 0; 0.2; 0.5; 0.8; 1) were obtained by the sol-gel method and characterized by various methods: X-ray diffraction (XRD), temperature-programmed reduction (H2-TPR), N2 sorption, temperature-programmed desorption of oxygen (TPD-O2), simultaneous thermal analysis (STA), and X-ray photoelectron spectroscopy (XPS). The H2-TPR results showed that an increase in the cobalt content in the GdFe1−xCoxO3 (x = 0; 0.2; 0.5; 0.8; 1) leads to a decrease in the reduction temperature. Using the TPD-O2 and STA methods, the lattice oxygen mobility is increasing in the course of the substitution of Fe for Co. Thus, the Fe substitution in the perovskite leads to an improvement in the oxygen reaction ability. Experiments on the soot oxidation reveal that catalytic oxidation ability increases in the series: GdFe0.5Co0.5O3 ˂ GdFe0.2Co0.8O3 ˂ GdCoO3, which is in good correlation with the increasing oxygen mobility according to H2-TPR, TPD-O2, and STA results. The soot oxidation over GdFeO3 and GdFe0.8Co0.2O3 is not in this range due to the impurities of iron oxides and higher specific surface area. Full article
Show Figures

Figure 1

Article
Synthesis of n-Alkoxy Derivatives of Layered Perovskite-Like Niobate HCa2Nb3O10 and Study of Their Photocatalytic Activity for Hydrogen Production from an Aqueous Solution of Methanol
Catalysts 2021, 11(8), 897; https://doi.org/10.3390/catal11080897 - 25 Jul 2021
Cited by 6 | Viewed by 1301
Abstract
A series of hybrid inorganic–organic niobates HCa2Nb3O10×ROH, containing n-alkoxy groups of primary alcohols (R = Me, Et, Pr, Bu, Hx, and Dc) grafted in the interlayer space, has been studied for the first time in relation [...] Read more.
A series of hybrid inorganic–organic niobates HCa2Nb3O10×ROH, containing n-alkoxy groups of primary alcohols (R = Me, Et, Pr, Bu, Hx, and Dc) grafted in the interlayer space, has been studied for the first time in relation to photocatalytic hydrogen generation from a model 1 mol % aqueous solution of methanol under ultraviolet irradiation. Photocatalytic activity was measured both for bare samples and for their composites with Pt nanoparticles as a cocatalyst. The advanced measurement scheme allowed monitoring the volume concentration of a sample in a suspension during the experiment, its pH, and possible exfoliation of layered compounds into nanolayers. In the series of n-alkoxy derivatives, the maximum rate of hydrogen evolution was achieved over a Pt-loaded ethoxy derivative HCa2Nb3O10×EtOH/Pt. Its apparent quantum efficiency of 20.6% in the 220–350 nm range was found not to be caused by changes in the light absorption region or specific surface area upon ethanol grafting. Moreover, the amounts of hydrogen released during the measurements significantly exceeded those of interlayer organic components, indicating that hydrogen is generated from the reaction solution rather than from the hybrid material. Full article
Show Figures

Figure 1

Review

Jump to: Research

Review
An Evaluation of the Biocatalyst for the Synthesis and Application of Zinc Oxide Nanoparticles for Water Remediation—A Review
Catalysts 2022, 12(11), 1442; https://doi.org/10.3390/catal12111442 - 15 Nov 2022
Viewed by 488
Abstract
Global water scarcity is threatening the lives of humans, and it is exacerbated by the contamination of water, which occurs because of increased industrialization and soaring population density. The available conventional physical and chemical water treatment techniques are hazardous to living organisms and [...] Read more.
Global water scarcity is threatening the lives of humans, and it is exacerbated by the contamination of water, which occurs because of increased industrialization and soaring population density. The available conventional physical and chemical water treatment techniques are hazardous to living organisms and are not environmentally friendly, as toxic chemical elements are used during these processes. Nanotechnology has presented a possible way in which to solve these issues by using unique materials with desirable properties. Zinc oxide nanoparticles (ZnO NPs) can be used effectively and efficiently for water treatment, along with other nanotechnologies. Owing to rising concerns regarding the environmental unfriendliness and toxicity of nanomaterials, ZnO NPs have recently been synthesized through biologically available and replenishable sources using a green chemistry or green synthesis protocol. The green-synthesized ZnO NPs are less toxic, more eco-friendly, and more biocompatible than other chemically and physically synthesized materials. In this article, the biogenic synthesis and characterization techniques of ZnO NPs using plants, bacteria, fungi, algae, and biological derivatives are reviewed and discussed. The applications of the biologically prepared ZnO NPs, when used for water treatment, are outlined. Additionally, their mechanisms of action, such as the photocatalytic degradation of dyes, the production of reactive oxygen species (ROS), the generation of compounds such as hydrogen peroxide and superoxide, Zn2+ release to degrade microbes, as well as their adsorbent properties with regard to heavy metals and other contaminants in water bodies, are explained. Furthermore, challenges facing the green synthesis of these nanomaterials are outlined. Future research should focus on how nanomaterials should reach the commercialization stage, and suggestions as to how this ought to be achieved are presented. Full article
Show Figures

Graphical abstract

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Study of lamellar mesoporous TiO2/MFI for photocatalytic degradation of rhodamine B dye in aqueous solution
Authors: R. I. Yocupicio-Gaxiola; V. Petranovskii; U. Caudillo-Flores; J. Antunez-Garcia; F. N. Murrieta-Rico; A. Urtaza Ruiz de Esparza; H. Borbon-Nuñez; S. Fuentes.
Affiliation: Institute of Chemistry, Department of Chemical Thermodynamics and Kinetics, Center for Thermal Analysis and Calorimetry, St. Petersburg State University, Universitetskiy pr. 26, 198504 Peterhof, Russia
Abstract: In this study, we report the synthesis of lamellar MFI zeolite with TiO2 pillars by mixing tetraethyl orthotitanate (TEOTi) as source of Ti and lamellar MFI zeolite. Stirring time (3, 6, 12 and 24 hours) was evaluated in order to observe differences in physicochemical properties. The physicochemical properties of the synthesized samples were analyzed by different techniques such as X-ray diffraction, UV-Vis spectrophotometry, N2 adsorption-desorption, and were further tested in the photocatalytic degradation of methylene blue dye. The zeolitic materials showed a lamellar MFI structure and TiO2 anatase pillars according to X-ray diffraction. The textural properties were higher for MFIPTi-6 and MFIPTi-24 with a surface area > 320 m2/g and a pore size of 4.1-4.2 nm. The photocatalytic activity of all MFIPTi materials was influenced by the active sites in TiO2 pillars, space between the layers, and textural properties. MFIPTi-6 sample exhibited the best photocatalytic activity for MB degradation under UV light irradiation with a degradation of 97% at 105 min of irradiation.

Title: Effect of SiO2/Al2O3 ratio on acid site distributions in H-mordenite catalysts
Authors: M.G. Shelyapina; E.A. Krylova; A.A. Tsyganenko; V. Petranovskii
Affiliation: Department of Nuclear Physics Research Methods, St. Petersburg State University, St. Petersburg, Russia
Abstract: Mordenites with MR ≥ 13 are fabricated on an industrial scale and are widely used in catalysis for sustainable chemistry, especially in the fields of energy and environmental protection. The catalytic properties of mordenite are largely determined by its pore structure, cationic form and the distribution of acid sites. In this contribution we report on the results of our comprehensive study of the structural, textural, thermal properties of H-mordenite catalysts with molar SiO2/Al2O3 ratio varied from 9.9 to 19.8. A special attention is paid to the study of the local structure and acid centers by NMR and IR spectroscopy.

Back to TopTop