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Mater. Proc., 2022, ANM 2022

The 19th and 20th International Conference on Advanced Nanomaterials

Aveiro, Portugal | 27–29 July 2022 & 26–28 July 2023

Volume Editors:
Elby Titus, University of Aveiro, Portugal
Luiz Pereira, University of Aveiro, Portugal
Joao Campos Gil, University of Coimbra, Portugal
Joao Pedro Araujo, University of Porto, Portugal
Joao Ventura, University of Porto, Portugal
Carmen M. Rangel, LNEG Lisbon, Portugal
Lijian Meng, Institute of Engineering Porto, Portugal

Number of Papers: 6
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Cover Story (view full-size image): This volume is a collection of selected papers from the works presented at the 19th and 20th International Conference on Advanced Nanomaterials held at the University of Aveiro, Portugal, from 27 to [...] Read more.
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4 pages, 704 KiB  
Proceeding Paper
Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction
by Matteo Tommasi, Francesco Conte, Ilenia Rossetti and Gianguido Ramis
Mater. Proc. 2022, 11(1), 1; https://doi.org/10.3390/materproc2022011001 - 5 Dec 2022
Cited by 1 | Viewed by 1187
Abstract
In this work we focus on carbon nitride materials to improve the conversion and productivity of the photoreduction of CO2, developing a coupled strategy to optimize materials and operating conditions. The metal-free polymeric catalyst, graphitic carbon nitride (g-C3N4 [...] Read more.
In this work we focus on carbon nitride materials to improve the conversion and productivity of the photoreduction of CO2, developing a coupled strategy to optimize materials and operating conditions. The metal-free polymeric catalyst, graphitic carbon nitride (g-C3N4), is a relatively novel material, characterized by a wide absorbance in the visible region and demonstrating a superior performance compared to the commercial titania P25 benchmark, the most used photocatalyst for this application. We used an innovative photoreactor operating at high pressures of up to 20 bar, which is unprecedented in photocatalytic applications where transparent windows are needed. This enabled a boost in the solubility of CO2 in water when operating the reactor as a tri-phase liquid/gas/solid device and improved the surface adsorption over the catalyst. The best productivity for HCOOH so far achieved with these catalysts at 8 bar, pH = 14 and by using Na2SO3 as a hole scavenger was ca. 370 g/h kgcat. Such productivity is several orders of magnitude higher than the literature values. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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9 pages, 2995 KiB  
Proceeding Paper
Effect of Cryogenic Treatment on the Phase Transformation Temperatures and Latent Heat of Ni54Ti46 Shape Memory Alloy
by Rodrigo A. Martins de Andrade, Maria Clara S. de Castro, Gustavo Reinke, Cláudio T. dos Santos and Tadeu C. da Silva
Mater. Proc. 2022, 11(1), 2; https://doi.org/10.3390/materproc2022011002 - 19 Dec 2022
Viewed by 1722
Abstract
Deep cryogenic treatment is characterized by subjecting the material to slow and controlled cooling at temperatures of up to approximately −196 °C or 77 K. This treatment has attracted industry interest and has been used in recent years, with relative success, to improve [...] Read more.
Deep cryogenic treatment is characterized by subjecting the material to slow and controlled cooling at temperatures of up to approximately −196 °C or 77 K. This treatment has attracted industry interest and has been used in recent years, with relative success, to improve the properties of metals, especially steels. In this article, we provide a preliminary study on the cryogenic soaking time effect of 6, 12, 24, and 36 h on the temperatures and latent transformation heat of the Ni54Ti46 alloy phase. By differential scanning calorimetry (DSC), the properties of samples subjected to different cryogenic soaking times at −196 °C were determined. The results indicated an increase in the phase transformation temperatures present in the alloy and a decrease in the latent heat of transformation in relation to the cryogenic soaking time. The reduction of 9% in the energy involved in the phase transformation was probably due to microstructural changes, and the increase of up to 14.8% in phase transformation temperatures was probably due to stress relief from the reduction of dislocations. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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5 pages, 2213 KiB  
Proceeding Paper
Synthesis and Characterization of Cross-Linked Polymer–Silica Composite Particles with Multi-Functional Groups
by Yayoi Yoshioka
Mater. Proc. 2022, 11(1), 3; https://doi.org/10.3390/materproc2022011003 - 27 Oct 2023
Viewed by 626
Abstract
Two types of core-shell composite particles, each comprising an aromatic poly(esteramide) (PEA) having amide and hydroxyl groups combined with silica (SiO2), were synthesized. This synthesis was performed by polymerizing two monomers in a mixture of acetone and N,N-dimethylacetamide in the presence [...] Read more.
Two types of core-shell composite particles, each comprising an aromatic poly(esteramide) (PEA) having amide and hydroxyl groups combined with silica (SiO2), were synthesized. This synthesis was performed by polymerizing two monomers in a mixture of acetone and N,N-dimethylacetamide in the presence of porous SiO2 particles. The surface morphologies of the resulting composite particles and the PEA loadings were determined to be highly dependent on the reaction solvent composition and the monomer used. Both types of particles exhibited unique adsorption properties depending on the dye being adsorbed and displayed differing adsorption efficiencies. In additional trials, carbon-SiO2 particles were obtained by heating the PEA-SiO2 particles to 700 °C under nitrogen. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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8 pages, 4806 KiB  
Proceeding Paper
Surface Treatments on Additively Manufactured Ti6Al4V Parts for the Formation of Photocatalytic Nanostructured Surfaces with Antibacterial Properties
by Ramón Arcas, Lucía Martín, Sales Ibiza, Olga Jordá, Francisco Bosch and Ana Valero-Gómez
Mater. Proc. 2022, 11(1), 4; https://doi.org/10.3390/materproc2022011004 - 27 Oct 2023
Viewed by 640
Abstract
Since the emergence of the SARS CoV2 virus, viral and antibacterial disinfection systems have become a global necessity, as well as their effective control and removal. In this context, the improvement of photocatalytic systems for the elimination of microorganisms may play a fundamental [...] Read more.
Since the emergence of the SARS CoV2 virus, viral and antibacterial disinfection systems have become a global necessity, as well as their effective control and removal. In this context, the improvement of photocatalytic systems for the elimination of microorganisms may play a fundamental role. In this work, a photocatalytic disinfection system was developed and evaluated, based on additively manufactured Ti6Al4V parts using near-visible UV light. Several electrochemical and/or thermal treatments were optimized to obtain different nanostructured morphologies. The results show the effectiveness of the photocatalytic effect (∆R) on E. coli bacteria on different Ti6Al4V modified surfaces, reaching ∆R values between 0.4 and 2.4. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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8 pages, 2570 KiB  
Proceeding Paper
Influence of Electrospinning Parameters on the Physicochemical Properties of Polycaprolactone, Chitosan, and Sericin Membranes
by María Oviedo, Yuliet Montoya, Catalina Alvarez and John Bustamante
Mater. Proc. 2022, 11(1), 5; https://doi.org/10.3390/materproc2022011005 - 27 Oct 2023
Cited by 1 | Viewed by 931
Abstract
The use of natural polymers such as sericin (SS) and chitosan (Ch) for developing biomaterials has increased in tissue engineering. To ensure adequate biointegration with the biological environment, the method used to obtain the biomaterial plays an important role, which is why the [...] Read more.
The use of natural polymers such as sericin (SS) and chitosan (Ch) for developing biomaterials has increased in tissue engineering. To ensure adequate biointegration with the biological environment, the method used to obtain the biomaterial plays an important role, which is why the electrospinning technique has been employed due to its versatility with regard to emulating the native extracellular matrix. The present study evaluated the influence of electrospinning parameters on the morphological, chemical, and thermal properties of polycaprolactone (PCL), Ch, and SS composite membranes. To achieve this, experiments were designed with varying manufacturing parameters and SS concentrations. The membranes were then characterized by scanning electron microscopy (SEM), Fourier transforms spectrophotometry (FTIR), and thermogravimetric analysis (TGA). SEM images showed that the electrospinning conditions and SS concentrations allow the development of electrospun membranes with high fibrillar density randomly oriented and fiber diameters below 100 nm. Likewise, the spectra and thermograms of the composite membranes show the possible chemical interactions and thermal behavior, demonstrating the homogeneity and stability of the fibrillar structure. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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8 pages, 3154 KiB  
Proceeding Paper
A Vegetable Oil as Heat Transfer Fluid for Parabolic Trough Collector: Dynamic Performance Analysis under Ouagadougou Climate Conditions
by Boubou Bagré, Sié Zacharie Kam, Yomi Woro Gounkaou, Makinta Boukar, Ibrahim Kolawole Muritala, Harouna Sani Dan Nomao, Korsaga Armand, Antoine Beré and Tizane Daho
Mater. Proc. 2022, 11(1), 6; https://doi.org/10.3390/materproc2022011006 - 4 Jan 2024
Viewed by 810
Abstract
In this study, the thermal performance of the parabolic trough collector (PTC) has been addressed under Ouagadougou climate conditions. Thus, after developing a model, the effect of mass flow on PTC performance showed that the Jatropha curcas oil (JCO) temperature difference increases when [...] Read more.
In this study, the thermal performance of the parabolic trough collector (PTC) has been addressed under Ouagadougou climate conditions. Thus, after developing a model, the effect of mass flow on PTC performance showed that the Jatropha curcas oil (JCO) temperature difference increases when the mass flow rate (m˙) decreases while the thermal efficiency (ηth) increases. For m˙ of 1 kg s−1, a collector length of 46.8 m or collection area of 230 m2 is required to obtain an outlet temperature of 210 °C with an average ηth of 82.69%. This paper can support the decision for a demonstration plant implementation regarding JCO use in the CSP plant. Full article
(This article belongs to the Proceedings of The 19th and 20th International Conference on Advanced Nanomaterials)
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