Article
Construction & Building Technology
T. Jesiak, M. Hasiak, A. Laszcz, J. Checmanowski, Y. Gerasymchuk, P. Stachowiak, W. Strek, D. Hreniak
Summary: This study explores the combination of thermal insulation properties of porous oxide material and the exceptional thermal conductivity properties of graphene flakes. Blocks of porous glass foam matrix were prepared using the sol-gel method and heat treatment at 450 degrees C. The microstructure of the samples was analyzed using scanning electron microscopy, Raman spectroscopy, and X-ray diffraction. The thermal and mechanical properties of the samples were discussed in relation to their potential applications as novel thermo-smart composite materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Xue-Kun Chen, Xiao-Yan Hu, Peng Jia, Zhong-Xiang Xie, Jun Liu
Summary: This study systematically investigates thermal transport in CFs and finds that the anisotropic behavior is related to the group velocity of phonons and can be regulated by strains. The interfacial thermal conductance of CFs/silicon substrate is predicted to be about 35 MW/m(2) K-1 for thermal management applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Physical
Gareth Sheppard, Karl Tassenberg, Bogdan Nenchev, Joel Strickland, Ramy Mesalam, Jennifer Shepherd, Hugo Williams
Summary: The novel porosity characterization algorithm proposed in this study allows for rapid and accurate analysis of 2D bulk porous structures. It provides insights into spatial feature variation and has the potential to optimize and enhance scaffolds within tissue engineering.
Review
Chemistry, Physical
Andrea Erigoni, Urbano Diaz
Summary: Organic-inorganic hybrid catalysts, especially those based on silica, have been extensively researched due to their combination of structural stability and versatility. This review focuses on the synthetic tools and chemistry behind the sol-gel syntheses of hybrid catalysts, as well as exemplificative studies on mono- and multi-functional silica-based catalysts with different active sites. Materials obtained through various approaches are compared in terms of properties and catalytic performances, aiming to provide useful information for researchers in the field.
Article
Materials Science, Multidisciplinary
P. Arevalo-Cid, M. F. Vaz, M. F. Montemor
Summary: Highly porous iron-nickel foams were prepared by a dynamic hydrogen bubble template electrodeposition method and showed excellent electrochemical stability and mechanical properties. The foam structure and morphology were affected by the Ni content, with higher Ni content resulting in better mechanical performance. This innovative technique enables the design of iron foams with desired properties for industrial applications.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Ceramics
Xuyang Chu, Xiaojin Tang, Wei Chen, Yifan Yang, Wei Zhou, Jianxiang Huang
Summary: This paper investigates the impact of problems like shear thinning in ink materials and the low formation accuracy of structured catalysts in the direct-ink-writing (DIW) process, and aims to improve the performance of DIW in printing structured catalysts through process optimization. The study focuses on the effects of process parameters on extrusion and formation in 3D printing, and analyzes the main factors affecting printing accuracy and stability. Experimental results show that the designed porous zeolite catalyst demonstrates fine catalytic performance and mechanical strength.
CERAMICS INTERNATIONAL
(2023)
Review
Materials Science, Multidisciplinary
Kaiwen Xue, Yan Mo, Baojun Long, Wen Wei, Changsheng Shan, Shaojun Guo, Li Niu
Summary: Single-atom catalysts (SACs) have drawn extensive attention due to their high catalytic activity and selectivity, high utilization of metal atoms, and cost reduction. Ordered porous materials (OPMs) serve as promising carriers for stabilizing single atoms by tuning their geometric and electronic structures through interactions, enhancing the catalytic activity. The development of SACs based on OPMs such as zeolites, metal-organic frameworks, and ordered mesoporous materials has been rapidly advancing, providing opportunities and challenges for developing novel catalysts with superior catalytic performances in the future.
Article
Thermodynamics
Chao Fan, Yang Li, Xin-Lin Xia, Chuang Sun
Summary: This study focuses on optimizing the structure of porous foams to enhance heat transfer and reduce pressure drop simultaneously at the pore level. The results show significant reductions in pressure drop and enhancements in heat transfer, with the maximum decrease in pressure drop exceeding 27% after optimization. The effect of optimization on heat transfer is more noticeable at higher inlet velocities, with the maximum increase in outlet dimensionless temperature over 12%. Furthermore, the influence of porosity on optimization is analyzed, indicating that significant pressure drop reduction can be achieved for all porosities, while heat transfer enhancement is only possible at higher inlet velocities.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Lei Zhao, Ziwei Lan, Wenhao Mo, Caihong Zhang
Summary: Sisal fibers were used to prepare composite Co/Co2N/N/C catalysts by high-temperature pyrolysis and precise control of the composite proportion of SPC and CoPc. The SPC@CoPc-1-4 catalyst showed high Eonset potential (1.04 V), high stability (90.50%), and slightly lower E1/2 (5 mV) compared to Pt/C catalyst. These composite catalysts combining biomass carbon materials and phthalocyanine series will provide a valuable reference for non-precious metal ORR catalysts.
Article
Chemistry, Physical
Petra S. Palvolgyi, Daniel Sebok, Imre Szenti, Eva Bozo, Henri Ervasti, Olli Pitkanen, Jari Hannu, Heli Jantunen, Marko E. Leinonen, Sami Myllymaki, Akos Kukovecz, Krisztian Kordas
Summary: In this study, highly porous and lightweight silica foams with extremely low permittivity and loss factor were synthesized by a template-assisted sol-gel method for applications in next generation wireless communication systems. Micropatterns of electrically conductive metals, such as Ag thin films, were successfully deposited on the smooth surfaces of the foams for radio frequency filter structures.
Article
Chemistry, Multidisciplinary
Zheng Li, Michael Benz, Carolin Rieg, Daniel Dittmann, Ann-Katrin Beurer, Dorothea Haeussermann, Bjornar Arstad, Michael Dyballa
Summary: The alumination mechanism of siliceous materials in aqueous alkaline solution involves partial dissolution of the surface to form reactive groups, with the amount of introduced aluminum depending on treatment conditions. The Na-forms can be ion exchanged quantitatively, potentially serving as carriers for catalytically active metal ions. Acid properties were investigated using different probe molecules, revealing the presence of distinct Bronsted and Lewis acid sites on re-aluminated Y zeolite.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Priyanka Verma, Matthew E. Potter, Alice E. Oakley, Panashe M. Mhembere, Robert Raja
Summary: In this study, PdAu bimetallic nanostructures supported on hierarchically porous silicoaluminophosphates (SAPOs) show significantly enhanced catalytic activities, highlighting the benefits of introducing hierarchical porosity in the SAPO support matrix.
Article
Chemistry, Physical
Jiajia Ye, Guang Xia, Xiaoxia Yang, Xuting Li, Jing Wang, Zhiqiang Zheng, Zhanghua Fu, Qingshuai Zhang, Cheng Hu
Summary: Ultrafine Ni5P4 nanoparticles embedded in 3D porous carbon foams were successfully designed and synthesized with the assistance of NaCl templating and phosphorization treatment. The composite showed high performance and cycling stability in lithium-ion and potassium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Lekshmi A. Kurup, Cameron M. Cole, Joshua N. Arthur, Soniya D. Yambem
Summary: The development of capacitive flexible pressure sensors using graphene-based conductive foams showed high sensitivity and durability, especially in detecting weak physiological signals within a low pressure range. The porous foams with graphene-coated pores demonstrated the highest sensitivity and showed potential applications in biomedical sensing and wearable devices.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Environmental
Chaochao Cao, Jingwen Yang, Kun Fu, Qinghong Zhai, Zheng Zhou, Jiawei Ji, Yuanhui Ma, Min Zhou, Yanming Xue, Chengchun Tang
Summary: Highly porous BN foams (BNFs) were prepared through a simple compression forming and controllable high-temperature nitriding method, featuring abundant micropores, mesopores, and macropores, as well as a robust three-dimensional structure. BNFs exhibit excellent gas molecule capture abilities and high adsorption capacities for various organic reagents and oils, making them ideal for advanced multifunctional adsorption applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
