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Multifunctional Hybrid Nanomaterials
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Multifunctional Hybrid Nanomaterials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 13131

Special Issue Editor

Dr. Joana F. B. Barata

E-Mail Website
Guest Editor
Department of Chemistry and CESAM, University of Aveiro, 3800-193 Aveiro, Portugal, Department of Chemistry and QOPNA, University of Aveiro, 3800-193 Aveiro, Portugal
Interests: photodynamic therapy; nanoparticles; corroles; synthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials play a crucial role in multiple areas, such as chemical and biological sensing, catalysis, imaging, and diagnosis, among others. Moreover, the preparation of multifunctional hybrid nanomaterials based on inorganic nanoparticles and organic dyes can lead to new insights and further progress in a wide range of applications. In fact, the synergistic effect of the combination of the two entities affords new materials with unique and key multifunctional physicochemical properties to be used as sensors and photosensitizers, among others.

The design, synthesis, and evaluation of high-performance multifunctional hybrid nanomaterials are quite challenge, with still a long way to go.

The main objective of this interdisciplinary Special Issue of Applied Sciences is to bring together, at an international level, high-quality papers concerning the synthesis, characterization, and application of multifunctional hybrid nanoparticles in several areas.

In this Special Issue, submissions in the form of full-length articles, reviews, communications, and mini reviews on nanoscience/technology at the interface of engineering, biology, physics, chemistry, and materials are encouraged for submission.

Dr. Joana F. B. Barata
Guest Editor

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Keywords

  • nanoassemblies
  • conjugation
  • metallic nanoparticles
  • QDs
  • macrocycles
  • dyes
  • energy transfer
  • photodynamic properties
  • sensor

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Published Papers (5 papers)

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Research

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14 pages, 1927 KiB  
Article
Sunlight Bleaching of Subporphyrazine Dye Films
by Vlad V. Travkin, Danila A. Semikov, Pavel A. Stuzhin, Ivan A. Skvortsov and Georgy L. Pakhomov
Appl. Sci. 2023, 13(2), 1211; https://doi.org/10.3390/app13021211 - 16 Jan 2023
Cited by 4 | Viewed by 1557
Abstract
Stable subphthalocyanine-type dyes with a high electron affinity attract much attention as potential substitutes for traditional fullerenes in molecular electronics devices. One possible way to enhance the acceptor properties of the subphthalocyanine core is by replacing the peripheral benzene fragments (C6H [...] Read more.
Stable subphthalocyanine-type dyes with a high electron affinity attract much attention as potential substitutes for traditional fullerenes in molecular electronics devices. One possible way to enhance the acceptor properties of the subphthalocyanine core is by replacing the peripheral benzene fragments (C6H4) with 1,2,5-thiadiazole fragments (C2N2S1). However, the resistance of these materials to light or atmospheric effect remains an open question, which limits their further application in device manufacturing. In this work, we compare vacuum-deposited films of three derivatives, SubPzS3H0 (all peripheral fragments are 1,2,5-thiadiazoles), SubPzS2H4 (two fragments are 1,2,5-thiadiazoles and one fragment is benzene), and SubPcS0H12 (all benzenes, i.e., parent subphthalocyanine). Practically relevant substrates were used for deposition, namely, bare glass, glass/ITO or FTO, and PET/ITO. Photobleaching of films under continuous 1 sun illumination was studied in laboratory air, synthetic air, and ultrapure argon. It is shown that the exclusion of near-UV photons from the incident light spectrum, which corresponds to the absorption of subphthalocyanines in the Soret-band, strongly inhibits degradation. Absorption in the Q-band range initiates soft annealing rather than photobleaching of films. The stability of the films deposited on glass decreases as SubPzS3H0 > SubPzS2H4 > SubPcS0H12 in air, and vice versa in argon. The substrate adds more complexity to this picture. In argon, the ITO coating reduces degradation of all of the compounds equally, in contrast to the glass samples, while in air, the SubPzS3H0 films discolor completely. The latter reaction proceeds due to the indium-containing species migrating from the conductive coating. Full article
(This article belongs to the Special Issue Multifunctional Hybrid Nanomaterials)
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11 pages, 1618 KiB  
Article
The Influence of Various Factors on Nanocatalyst Activity during Benzothiophene Hydrogenation
by Aigerim Barshabayeva, Nazerke Balpanova, Darzhan Aitbekova, Murzabek Baikenov, Yermek Aubakirov, Z. S. Khalikova, Almas Tusipkhan, Balzhan Tulebaeva and Taurbaeva Gulzhan
Appl. Sci. 2022, 12(24), 12792; https://doi.org/10.3390/app122412792 - 13 Dec 2022
Cited by 2 | Viewed by 1322
Abstract
Herein, we disclosed a method of preparing a nanocatalyst containing nickel-cobalt by impregnation in a hydrochloric acid medium. Optimal conditions were established for all stages of nanocatalyst preparation using the method of probabilistic–deterministic experiment planning: hydrochloric acid concentration—1 mol/L, ratio of HCl concentration [...] Read more.
Herein, we disclosed a method of preparing a nanocatalyst containing nickel-cobalt by impregnation in a hydrochloric acid medium. Optimal conditions were established for all stages of nanocatalyst preparation using the method of probabilistic–deterministic experiment planning: hydrochloric acid concentration—1 mol/L, ratio of HCl concentration to nickel concentration—20, ratio of HCl concentration to cobalt concentration—20. The method of planning the experiment of preparing a nanocatalyst allows varying all the factors simultaneously and obtaining quantitative estimates of the main effects and effects of interaction, as well as establishing the dominant factors affecting the activity and selectivity of the nanocatalyst during the hydrogenation of benzothiophene. The multifactorial equation was obtained, which allowed us to calculate the optimal manufacturing parameters of the nanocatalyst, providing high activity and selectivity during the hydrogenation of benzothiophene. In the proposed nanocatalyst, a readily available natural chrysotile–asbestos with a nanotube diameter of 60–75 nm was used as a carrier for the benzothiophene hydrogenation process. Full article
(This article belongs to the Special Issue Multifunctional Hybrid Nanomaterials)
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15 pages, 5861 KiB  
Article
Adsorption of CO2 on ZSM-5 Zeolite: Analytical Investigation via a Multilayer Statistical Physics Model
by Fatma Aouaini, Nadia Bouaziz, Wafa Alfwzan, Noura Khemiri, Zainab Elqahtani and Abdelmottaleb Ben Lamine
Appl. Sci. 2022, 12(3), 1558; https://doi.org/10.3390/app12031558 - 31 Jan 2022
Cited by 15 | Viewed by 3622
Abstract
In this paper, a synthesized zeolite (ZSM-5) is used as an adsorbent to analyze the adsorption phenomenon of carbon dioxide. This investigation, based on the statistical physics treatment, applied the multilayer model with saturation to understand the CO2 adsorption on four samples, [...] Read more.
In this paper, a synthesized zeolite (ZSM-5) is used as an adsorbent to analyze the adsorption phenomenon of carbon dioxide. This investigation, based on the statistical physics treatment, applied the multilayer model with saturation to understand the CO2 adsorption on four samples, namely M-ZSM-5 (M = Na+, Mg2+, Zn2+, La3+), at various temperatures T = 0 °C, 30 °C and 60 °C. The modeling results indicated that CO2 adsorption occurred via a non-parallel orientation on the ZSM-5 surface. The CO2 adsorption capacities varied from 26.14 to 28.65 cm3/g for Na-ZSM-5, from 25.82 to 27.97 cm3/g for Mg-ZSM-5, from 54.82 to 68.63 cm3/g for La-ZSM-5 and from 56.53 to 74.72 cm3/g for Zn-ZSM-5. Thus, Zn-ZSM-5 exhibits the highest adsorption amount. The analysis of the adsorption energies shows that the adsorption of CO2 on ZSM-5 zeolite is a physisorption phenomenon that could be controlled thanks to the energy parameters obtained via the numerical findings using the multilayer statistical model. Finally, the distribution of site energy was determined to confirm the physical character of the interactions between adsorbate/adsorbent and the heterogeneity of the zeolite surface. Full article
(This article belongs to the Special Issue Multifunctional Hybrid Nanomaterials)
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23 pages, 9417 KiB  
Article
A Recent Study on Remediation of Direct Blue 15 Dye Using Halloysite Nanotubes
by Shareefraza J. Ukkund, Prasad Puthiyillam, Ali E. Anqi, Syed Noeman Taqui, Masood Ashraf Ali, Usman Taqui Syed, Mohammed N. Alghamdi, Md Irfanul Haque Siddiqui, Hashim M. Alshehri, Mohammad Reza Safaei, Rayees Afzal Mir, Ashraf Elfasakhany, Emad M. Eed, Marjan Goodarzi and Manzoore Elahi M. Soudagar
Appl. Sci. 2021, 11(17), 8196; https://doi.org/10.3390/app11178196 - 3 Sep 2021
Cited by 8 | Viewed by 2125
Abstract
A set of lab-scale experiments were designed and conducted to remedy Direct Blue 15 (DB15) dye using nontoxic halloysite nanotubes (HNT) with the view to be utilized in a textile industrial effluent (TIE). The DB15 adsorbed-HNT “sludge” was used as a reinforcing agent [...] Read more.
A set of lab-scale experiments were designed and conducted to remedy Direct Blue 15 (DB15) dye using nontoxic halloysite nanotubes (HNT) with the view to be utilized in a textile industrial effluent (TIE). The DB15 adsorbed-HNT “sludge” was used as a reinforcing agent and plastic waste to fabricate the composite. To advance the knowledge and further understand the chemical phenomena associated with DB15 adsorption on HNT, different factors like pH value, adsorbate initial concentration, adsorbent dosage, and temperature on the composite were affected experimentally tested. To estimate the adsorption capacity of HNT, nine isotherm models were applied, and it was identified that the Brouers–Sotolongo adsorption isotherm model represented the best accuracy for predicting the adsorption behavior of the HNT. Likewise, the pseudo-second-order reaction was the predominant mechanism for the overall rate of the multi-step dye adsorption process. Additionally, it was demonstrated that the mass transfer during the process is diffusion-controlled, and thermodynamic assessments showed that the process is physisorption. Full article
(This article belongs to the Special Issue Multifunctional Hybrid Nanomaterials)
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Review

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27 pages, 5156 KiB  
Review
Uses of Nanoclays and Adsorbents for Dye Recovery: A Textile Industry Review
by Daniel López-Rodríguez, Bàrbara Micó-Vicent, Jorge Jordán-Núñez, Marilés Bonet-Aracil and Eva Bou-Belda
Appl. Sci. 2021, 11(23), 11422; https://doi.org/10.3390/app112311422 - 2 Dec 2021
Cited by 21 | Viewed by 3666
Abstract
Wastewater recovery is one of the most pressing contaminant-related subjects in the textile industry. Many cleaning and recovery techniques have been applied in recent decades, from physical separation to chemical separation. This work reviews textile wastewater recovery by focusing on natural or synthetic [...] Read more.
Wastewater recovery is one of the most pressing contaminant-related subjects in the textile industry. Many cleaning and recovery techniques have been applied in recent decades, from physical separation to chemical separation. This work reviews textile wastewater recovery by focusing on natural or synthetic nanoclays in order to compare their capabilities. Presently, a wide variety of nanoclays are available that can adsorb substances dissolved in water. This review summarizes and describes nanoclay modifications for different structures (laminar, tubular, etc.) to compare adsorption performance under the best conditions. This adsorbent capacity can be used in contaminant industries to recover water that can be used and be recontaminated during a second use to close the production circle. It explores and proposes future perspectives for the nanoclay hybrid compounds generated after certain cleaning steps. This is a critical review of works that have studied adsorption or desorption procedures for different nanoclay structures. Finally, it makes a future application proposal by taking into account the summarized pros and cons of each nanoclay. This work addresses contaminant reuse, where part of the employed dyes can be reused in printing or even dyeing processes, depending on the fixing capacity of the dye in the nanoclay, which is herein discussed. Full article
(This article belongs to the Special Issue Multifunctional Hybrid Nanomaterials)
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