scholarly journals Long chain ionic liquid-assisted synthesis of PS/Pd beads and hierarchical porous Pd–SiO2

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 25141-25149 ◽  
Author(s):  
Tianlong Wang ◽  
Ting Fu ◽  
Yuting Meng ◽  
Jing Shen ◽  
Tongwen Wang
Keyword(s):  
Ionic Liquid ◽  
Porous Silica ◽  
Hierarchical Porous ◽  
Long Chain

1-Hexadecyl-3-methylimidazolium chloride (C16mimCl) can be used as “bridges” to prepare PS/C16mimCl/Pd beads, and Pd-loaded hierarchical porous silica was synthesized using dual templates of the PS/C16mimCl/Pd beads and C16mimCl.

Synergic effects of a protic ionic liquid on P123 mixed micelles for inducing hierarchical porous materials

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53267-53274 ◽  
Author(s):  
Shuo Zhao ◽  
Xiaoli Sheng ◽  
Yuming Zhou ◽  
Man He ◽  
Xiaoqin Fu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Porous Materials ◽  
Formation Mechanism ◽  
Mixed Micelles ◽  
Porous Silica ◽  
Protic Ionic Liquid ◽  
Hierarchical Porous

Postulated formation mechanism of hierarchical porous silica.

Eco-fabrication of hierarchical porous silica monoliths by ice-templating of rice husk ash

2017 ◽  
Vol 19 (1) ◽  
pp. 188-195 ◽  
Author(s):  
Amin Bahrami ◽  
Ulla Simon ◽  
Niloofar Soltani ◽  
Sara Zavareh ◽  
Johannes Schmidt ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Porous Silica ◽  
Synthesis Process ◽  
Sustainable Chemistry ◽  
Silica Monoliths ◽  
Hierarchical Porous ◽  
Ice Templating

In this study, within a sustainable chemistry approach, a clean and eco-friendly synthesis process of silica monoliths compatible with environmental limitations is developed.

Effect of pH and chitosan concentration on precipitation and morphology of hierarchical porous silica

2011 ◽  
Vol 357 (19-20) ◽  
pp. 3513-3519 ◽  
Author(s):  
Thongthai Witoon ◽  
Soponwit Tepsarn ◽  
Puscharapon Kittipokin ◽  
Ben Embley ◽  
Metta Chareonpanich
Keyword(s):  
Porous Silica ◽  
Effect Of Ph ◽  
Chitosan Concentration ◽  
Hierarchical Porous

scholarly journals Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1098
Author(s):  
Ling Xu ◽  
Fan Wang ◽  
Zhi Xiu ◽  
Limei Duan ◽  
Zongrui Liu ◽  
...  
Keyword(s):  
Physical Adsorption ◽  
Porous Silica ◽  
Mesoporous Structure ◽  
Catalytic Performance ◽  
Crystallization Time ◽  
Hydrothermal Conditions ◽  
Transmission Electron ◽  
Hierarchical Porous ◽  
Silica Alumina ◽  
Ft Ir

Hierarchical aluminum-silicon materials have been successfully prepared by mixing pre-crystallization of silica-alumina sol and citric acid under hydrothermal conditions. The influence of pre-crystallization time on the micro-mesoporous structure is studied using Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), N2 physical adsorption, and high-resolution transmission electron microscopy (HRTEM). The catalytic performance of hierarchical silica-alumina material is evaluated by alkylation of phenol with tert-butanol. The results show that the silica-alumina materials with a pre-crystallization time of 16 h show micro-mesoporous structure and excellent catalytic activity.

Highly accessible hierarchical porous carbon from a bi-functional ionic liquid bulky gel: high-performance electrochemical double layer capacitors

2019 ◽  
Vol 7 (44) ◽  
pp. 25297-25304 ◽  
Author(s):  
Yang Yan ◽  
Xiao-Feng Hao ◽  
Li-guo Gao ◽  
Si-si Lin ◽  
Nan Cui ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Porous Carbon ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Liquid Electrolyte ◽  
Hierarchical Porous Carbon ◽  
Ionic Liquid Electrolyte ◽  
Hierarchical Porous ◽  
Electrochemical Double Layer

The graphene-based hierarchical porous carbon GGI has high surface area, dual-doping, micro/meso-pores and exhibits good compatibility with the ionic liquid electrolyte EmimTFSI.

Mechanically Strong and Hierarchical Porous Silica Ceramics via Gelcasting-Lyophilization

2016 ◽  
Vol 697 ◽  
pp. 414-418
Author(s):  
Wei Wan ◽  
Jian Yang ◽  
Yong Bao Feng ◽  
Tai Qiu
Keyword(s):  
Raw Materials ◽  
Aqueous Suspension ◽  
Three Dimensional ◽  
Porous Silica ◽  
Hierarchical Porous ◽  
Exhaust Fumes ◽  
Materials Used ◽  
Gelcasting Process ◽  
Hierarchical Pore ◽  
Highly Porous

Highly porous silica ceramics were prepared by in-situ gelation of an aqueous suspension with well dispersed silica particles and N’N-dimethylacrylamide (DMAA) monomer, followed by lyophilization and pressureless sintering. The gelcasting process was imparted by polymerization of DMAA. The silica raw materials used in this experiment are the dusts collected from the exhaust fumes of silicon industry. The as-obtained porous silica ceramics had three-dimensional and hierarchical pore structure and the porosity ranged from 75 to 88 % as the sintering temperature varied from 850 to 1050 °C. In addition, the porous silica ceramics appeared to have strong mechanical strength. Compressive strength of the porous silica ceramics was as high as 3.2 MPa even when the porosity was nearly 80%. The gelcasting-lyophilization method was proved to be a novel and promising route for the preparation of highly porous and mechanically strong materials.

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