Synthesis of Monolithic Hierarchically Porous Iron-Based Xerogels from Iron(III) Salts via an Epoxide-Mediated Sol–Gel Process

2012 ◽  
Vol 24 (11) ◽  
pp. 2071-2077 ◽  
Author(s):  
Yasuki Kido ◽  
Kazuki Nakanishi ◽  
Akira Miyasaka ◽  
Kazuyoshi Kanamori
Keyword(s):  
Sol Gel ◽  
Porous Iron ◽  
Hierarchically Porous ◽  
Sol Gel Process ◽  
Iron Based

Synthesis of hierarchically porous MnO/C composites via a sol–gel process followed by two-step combustion for lithium-ion batteries

2020 ◽  
Vol 44 (28) ◽  
pp. 12307-12316
Author(s):  
Wei Liu ◽  
Daoyan Feng ◽  
Hui Yang ◽  
Xingzhong Guo
Keyword(s):  
Phase Separation ◽  
Lithium Ion Batteries ◽  
Sol Gel ◽  
Lithium Ion ◽  
Hierarchically Porous ◽  
Sol Gel Process

Hierarchically porous MnO/C composites with interconnected macropores and co-continuous skeletons were fabricated via a sol–gel process combined with phase separation, followed by a two-step combustion.

Magnetic porous iron oxide monoliths prepared through epoxide-mediated sol-gel process

2017 ◽  
Vol 88 ◽  
pp. 214-217 ◽  
Author(s):  
Daichi Jinmori ◽  
Yuji Masubuchi ◽  
Shinichi Kikkawa
Keyword(s):  
Iron Oxide ◽  
Sol Gel ◽  
Porous Iron ◽  
Sol Gel Process

scholarly journals Static Corrosion Test of Porous Iron Material with Polymer Coating

2016 ◽  
Vol 16 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Lucia Markušová-Bučková ◽  
Renáta Oriňaková ◽  
Andrej Oriňak ◽  
Radka Gorejová ◽  
Miriam Kupková ◽  
...  
Keyword(s):  
Polymer Coating ◽  
Sol Gel ◽  
Porous Iron ◽  
Static Test ◽  
Replication Method ◽  
Sol Gel Process ◽  
Static Conditions ◽  
Peg Coating ◽  
Iron Material ◽  
Hank’S Solution

Abstract At present biodegradable implants received increased attention due to their use in various fields of medicine. This work is dedicated to testing of biodegradable materials which could be used as bone implants. The samples were prepared from the carbonyl iron powder by replication method and surface polymer film was produced through sol-gel process. Corrosion testing was carried out under static conditions during 12 weeks in Hank’s solution. The quantity of corrosion products increased with prolonging time of static test as it can be concluded from the results of EDX analysis. The degradation of open cell materials with polyethylene glycol coating layer was faster compared to uncoated Fe sample. Also the mass losses were higher for samples with PEG coating. The polymer coating brought about the desired increase in degradation rate of porous iron material.

scholarly journals Preparation of a hierarchically porous AlPO4monolith via an epoxide-mediated sol–gel process accompanied by phase separation

2013 ◽  
Vol 14 (4) ◽  
pp. 045007 ◽  
Author(s):  
Wenyan Li ◽  
Yang Zhu ◽  
Xingzhong Guo ◽  
Kazuki Nakanishi ◽  
Kazuyoshi Kanamori ◽  
...  
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Hierarchically Porous ◽  
Sol Gel Process

Preparation of a compressible and hierarchically porous polyimide sponge via the sol–gel process of an aliphatic tetracarboxylic dianhydride and an aromatic triamine

2016 ◽  
Vol 52 (68) ◽  
pp. 10419-10422 ◽  
Author(s):  
Jeongmin Lee ◽  
Ji Young Chang
Keyword(s):  
Sol Gel ◽  
Hierarchically Porous ◽  
Sorbent Material ◽  
Sol Gel Process ◽  
Tetracarboxylic Dianhydride

A monolithic microporous polyimide sponge with compressibility and an amphiphilic character was synthesized for use as a soft sorbent material.

scholarly journals Synthesis of Hierarchically Porous Metal Oxide Monoliths via Sol–Gel Process Accompanied by Phase Separation From Divalent Metal Salts: A Short Review

2021 ◽  
Vol 3 ◽  
Author(s):  
Xuanming Lu ◽  
Kazuki Nakanishi
Keyword(s):  
Phase Separation ◽  
Metal Oxide ◽  
Sol Gel ◽  
Porous Metal ◽  
Short Review ◽  
Divalent Metal ◽  
Metal Salts ◽  
Hierarchically Porous ◽  
Metal Phosphates ◽  
Sol Gel Process

The sol–gel process accompanied by phase separation is one of the methods to prepare hierarchically porous monoliths, hierarchically porous monolith, which is applicable not only to oxides but also to various materials compositions such as metal phosphates, organic-polymers/carbons, metal-organic frameworks. It is not until recently, however, that progress has been made in the preparation of low-valence metal oxide HPMs, such as those of magnesium, manganese, cobalt, nickel, etc. Due to the difficulty of divalent metal precursors to form homogeneous gels, different approaches from those established for trivalent and tetravalent counterparts have been attempted. This short review introduces the methods and trials in the preparation of metal oxide HPMs from divalent metal salts.

scholarly journals Hierarchically porous monoliths based on low-valence transition metal (Cu, Co, Mn) oxides: gelation and phase separation

2020 ◽  
Vol 7 (11) ◽  
pp. 1656-1666 ◽  
Author(s):  
Xuanming Lu ◽  
Kazuyoshi Kanamori ◽  
Kazuki Nakanishi
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Average Molecular Weight ◽  
Reaction Parameters ◽  
Valence Transition ◽  
Hierarchically Porous ◽  
Sol Gel Process ◽  
Crystalline Metal ◽  
Hydrolysis And Polycondensation ◽  
Mn Oxides

Abstract Hierarchically porous monoliths based on copper (Cu), cobalt (Co) and manganese (Mn) oxides with three-dimensionally (3D) interconnected macropores and open nanopores were prepared using metal bromides as precursors via a sol–gel process accompanied by phase separation. The difficulty of gelation for low-valence metal cation was overcome by introducing a highly electronegative Br atom near to the metal atom to control the rates of hydrolysis and polycondensation. The 3D interconnected macropores were obtained using appropriate polymers to induce phase separation. The domain sizes of macropores and skeletons can be controlled by reaction parameters such as concentration and/or average molecular weight of polymers, and the amount of hydrochloric acid. The crystalline metal oxide monoliths with their 3D interconnected macroporous structure preserved were obtained after heat treatment in air.

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