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Materials for Sustainability
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Materials for Sustainability

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Materials".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6445

Special Issue Editor

Dr. Brant Walkley

E-Mail Website
Guest Editor
Department of Chemical and Biological Engineering, Sheffield S10 2TG, UK
Interests: investigation of composition-structure-property relationships, reaction mechanisms and kinetics in novel nanomaterials, nanocomposites, ceramics, and cementitious binders, using advanced spectroscopic and microstructural techniques, including solid state nuclear magnetic resonance spectroscopy

Special Issue Information

Dear Colleagues,

Rapidly increasing urbanisation, growth in infrastructure and energy industries, and the overwhelming need to mitigate climate change, have created tremendous demand for sustainable materials and processing technologies. In particular, new materials for sustainable infrastructure, manufacturing, environmental remediation and energy production and storage are required to support a global society and ensure a safe and sustainable future.

The development of better, cheaper and more sustainable materials is often impeded by a lack of understanding of the fundamental interactions occurring at the atomic or nanoscale which dictate material performance. Improved material design and optimisation often requires, for example, insight into the composition-structure-property relationships, reaction mechanisms and kinetics occurring during material synthesis, processing and use...

Dr. Brant Walkley
Guest Editor

Keywords

  • Engineering and structural materials (metals, alloys, ceramics, cements, composites)
  • Organic and soft materials (glasses, colloids, liquid crystals, polymers)
  • Bio-inspired, biomedical and biomolecular materials
  • Optical, photonic and optoelectronic materials
  • Materials for electronics
  • Materials for energy
  • Catalytic and separation materials
  • Nanoscale materials and processes
  • Design, synthesis, processing and characterization techniques

Published Papers (3 papers)

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Research

11 pages, 2353 KiB  
Article
New Antifriction Composites for Printing Machines Based on Tool Steel Grinding Waste
by Tetiana Roik, Oleg Gavrysh, Ahmad Rashedi, Taslima Khanam, Ali Raza and Byongug Jeong
Sustainability 2022, 14(5), 2799; https://doi.org/10.3390/su14052799 - 27 Feb 2022
Cited by 3 | Viewed by 1620
Abstract
In this article, we present research results on the structure and properties of new self-lubricating antifriction composites based on 4H4VMFS tool steel grinding waste with solid lubricant additives. The new composites are designed to work in the friction units of offset cylinders in [...] Read more.
In this article, we present research results on the structure and properties of new self-lubricating antifriction composites based on 4H4VMFS tool steel grinding waste with solid lubricant additives. The new composites are designed to work in the friction units of offset cylinders in printing machines at rotation speeds up to 7000 rpm and increased loads up to 5.0 MPa. The developed technology formed composites with a fine-grained heterophase structure with a metal matrix base of tool steel 4H4VMFS regenerated grinding waste, consisting of high-alloy α−solid solution and hard grains of alloying element carbides, as well as evenly distributed CaF2 antiseizure solid lubricant. This structure ensured the formation of composites with favorable functional properties. During the friction process, antiseizure films were formed on the contact surfaces, resulting in a self-lubrication mode. Comparative tests for friction and wear showed significant advantages of the new waste composite compared to cast bronze parts, which are traditionally used in the friction units of offset cylinders of rolled newspaper printing machines. The stable operation of the new composite made it possible to ensure a “wear-free” effect. Studies have shown the importance and prospects of using the wide range of valuable grinding waste in the reproduction cycle to manufacture quality composites. Reuse of such waste would significantly protect the environment from pollution connected with human activity industrial and mitigate negative impacts on ecosystems and the biosphere. Full article
(This article belongs to the Special Issue Materials for Sustainability)
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15 pages, 3406 KiB  
Article
Electrochemical Investigations of BaCe0.7-xSmxZr0.2Y0.1O3-δ Sintered at a Low Sintering Temperature as a Perovskite Electrolyte for IT-SOFCs
by Muneeb Irshad, Mehak Khalid, Muhammad Rafique, Asif Nadeem Tabish, Ahmad Shakeel, Khurram Siraj, Abdul Ghaffar, Rizwan Raza, Muhammad Ahsan, Quar tul Ain and Qurat ul Ain
Sustainability 2021, 13(22), 12595; https://doi.org/10.3390/su132212595 - 15 Nov 2021
Cited by 9 | Viewed by 2007
Abstract
Perovskite materials have gained a lot of interest in solid oxide fuel cell (SOFC) applications owing to their exceptional properties; however, ideal perovskites exhibit proton conduction due to availability of low oxygen vacancies, which limit their application as SOFC electrolytes. In the current [...] Read more.
Perovskite materials have gained a lot of interest in solid oxide fuel cell (SOFC) applications owing to their exceptional properties; however, ideal perovskites exhibit proton conduction due to availability of low oxygen vacancies, which limit their application as SOFC electrolytes. In the current project, Sm was doped at the B-site of a BaCe0.7-xSmxZr0.2Y0.1O3-δ perovskite electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). BaCe0.7-xSmxZr0.2Y0.1O3-δ electrolytes were synthesized through a cost-effective coprecipitation method and were sintered at a low sintering temperature. The effects of samarium (Sm) doping on the electrochemical performance of BaCe0.7-xSmxZr0.2Y0.1O3-δ were investigated. X-ray diffraction (XRD) analysis confirmed that the BaCe0.7-xSmxZr0.2Y0.1O3-δ electrolyte material retained the perovskite structure. The secondary phase of Sm2O3 was observed for BaCe0.4Sm0.3Zr0.2Y0.1O3-δ. Scanning electron microscopic (SEM) imaging displayed the dense microstructure for all the compositions, while prominent crystal growth was observed for composition x = 0.3. The formation of the perovskite structure and the presence of the hydroxyl groups of metal oxides for all the compositions were confirmed by Fourier transform infrared spectroscopy (FTIR). An increased symmetrical disturbance was also observed for the increased doping ratio of the Sm. Thermogravimetric analysis (TGA) of all the compositions showed no major weight loss in the SOFC operating temperature range. It was also noted that the conductivity of BaCe0.7-xSmxZr0.2Y0.1O3-δ gradually decreased with the increased contents of the Sm metal. The maximum power density of 390 mW cm−2, and an open-circuit voltage (OCV) of 1.0 V at 600 °C, were obtained, showing that BaCe0.7-xSmxZr0.2Y0.1O3-δ, synthesized by a cost-effective method and sintered at a low temperature, can be used as a proton-conducting electrolyte for IT-SOFCs. Full article
(This article belongs to the Special Issue Materials for Sustainability)
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18 pages, 3699 KiB  
Article
From Disposal to Reuse: Production of Sustainable Fatty Acid Alkyl Esters Derived from Residual Oil Using a Biphasic Magnetic Catalyst
by Adriano Lima da Silva, Carlos Bruno Barreto Luna, Ana Flávia Félix de Farias, Suelen Alves Silva Lucena de Medeiros, Simoni Margareti Plentz Meneghetti, Alisson Mendes Rodrigues and Ana Cristina Figueiredo de Melo Costa
Sustainability 2020, 12(23), 10159; https://doi.org/10.3390/su122310159 - 4 Dec 2020
Cited by 10 | Viewed by 2011
Abstract
The development of technologies to promote residual oil reuse has been encouraged, aiming to reduce the environmental impact and promote sustainability. In this study, a biphasic magnetic catalyst with composition equal to ZnO-Ni0.5Zn0.5Fe2O4 was synthesized and [...] Read more.
The development of technologies to promote residual oil reuse has been encouraged, aiming to reduce the environmental impact and promote sustainability. In this study, a biphasic magnetic catalyst with composition equal to ZnO-Ni0.5Zn0.5Fe2O4 was synthesized and applied to the fatty acid alkyl ester (FAAE) production from residual oil. The ZnO-Ni0.5Zn0.5Fe2O4 catalyst was synthesized by combustion reaction and characterized by X-ray diffraction (XRD), textural analysis, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, thermogravimetry, particle size distribution, scanning electron microscopy, magnetic measurements, quantification of acidic sites by TPD-NH3, and catalytic tests. The efficiency of catalyst synthesis was evaluated by XRD, FTIR, and Raman spectroscopy experiments. Granulometric analysis and SEM images confirmed the presence of the agglomerates and particles with a wide size range. The catalyst presented soft magnetic behavior, with high saturation magnetization. Additionally, the catalytic activity of the ZnO-Ni0.5Zn0.5Fe2O4 system showed an average conversion of 73% for the methyl route. The results indicate that the reuse of residual oil is feasible for FAAE production, contributing to sustainable fuel development. Moreover, it allows the reintroduction of waste oil into the biodiesel production chain, reducing cost after process optimization. Full article
(This article belongs to the Special Issue Materials for Sustainability)
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