Fabrication of hierarchically porous silica nanospheres through sol–gel process and pseudomorphic transformation

A novel method of microemulsion coupling with sol–gel process was used for preparation of porous silica using tetraethyl orthosilicate as silicon source. Effect of solvent and catalyst on the surface texture properties was investigated respectively. The results showed that porous silica with large specific surface area (738.65 m2/g) and high pore volume (2.01 cm3/g) was obtained. However, the mesopores in silica were arranged in disorder and showed great ununiformity in shape and arrangement. To obtain porous silica with desired texture properties, an appropriate dosage of ethanol and higher HCl concentration were needed.

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Textural characterization of porous silica films prepared by the sol–gel process

Surface and Colloid Science ◽

10.1007/b97091 ◽

2004 ◽

pp. 227-231

Author(s):

G. L. T. Nascimento ◽

L. M. Seara ◽

B. R. A. Neves ◽

N. D. S. Mohallem

Keyword(s):

Sol Gel ◽

Porous Silica ◽

Silica Films ◽

Textural Characterization ◽

Sol Gel Process

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Multiple gold nanorods@hierarchically porous silica nanospheres for efficient multi-drug delivery and photothermal therapy

Journal of Materials Chemistry B ◽

10.1039/c6tb03020c ◽

2017 ◽

Vol 5 (8) ◽

pp. 1642-1649 ◽

Cited By ~ 10

Author(s):

Nan Li ◽

Dechao Niu ◽

Xiaobo Jia ◽

Jianping He ◽

Yu Jiang ◽

...

Keyword(s):

Drug Delivery ◽

Gold Nanorods ◽

Photothermal Therapy ◽

Biomedical Applications ◽

Porous Silica ◽

Photothermal Effect ◽

Silica Nanospheres ◽

Hierarchically Porous ◽

Silica Nanocomposites ◽

Hierarchically Porous Structure

Gold-based silica nanocomposites with hierarchically porous structure, as well as excellent photothermal effect, have shown great potentials in biomedical applications.

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Synthesis of bimodal porous silica from rice husk ash via sol–gel process using chitosan as template

Materials Letters ◽

10.1016/j.matlet.2007.09.004 ◽

2008 ◽

Vol 62 (10-11) ◽

pp. 1476-1479 ◽

Cited By ~ 59

Author(s):

T. Witoon ◽

M. Chareonpanich ◽

J. Limtrakul

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Sol Gel ◽

Porous Silica ◽

Sol Gel Process

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Characterization of porous silica gels prepared via the sol-gel process by29Si CP/MAS solid-state NMR spectroscopy

Molecular Physics ◽

10.1080/00268979000102101 ◽

1990 ◽

Vol 71 (4) ◽

pp. 769-780 ◽

Cited By ~ 23

Author(s):

K.L. Walther ◽

A. Wokaun ◽

A. Baiker

Keyword(s):

Solid State ◽

Nmr Spectroscopy ◽

Solid State Nmr ◽

Sol Gel ◽

Porous Silica ◽

Silica Gels ◽

Solid State Nmr Spectroscopy ◽

Sol Gel Process

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

New Journal of Chemistry ◽

10.1039/d0nj01538e ◽

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.

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

Science and Technology of Advanced Materials ◽

10.1088/1468-6996/14/4/045007 ◽

2013 ◽

Vol 14 (4) ◽

pp. 045007 ◽

Cited By ~ 15

Author(s):

Wenyan Li ◽

Yang Zhu ◽

Xingzhong Guo ◽

Kazuki Nakanishi ◽

Kazuyoshi Kanamori ◽

...

Keyword(s):

Phase Separation ◽

Sol Gel ◽

Hierarchically Porous ◽

Sol Gel Process

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

Chemistry of Materials ◽

10.1021/cm300495j ◽

2012 ◽

Vol 24 (11) ◽

pp. 2071-2077 ◽

Cited By ~ 60

Author(s):

Yasuki Kido ◽

Kazuki Nakanishi ◽

Akira Miyasaka ◽

Kazuyoshi Kanamori

Keyword(s):

Sol Gel ◽

Porous Iron ◽

Hierarchically Porous ◽

Sol Gel Process ◽

Iron Based

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Porous Silica: A Potential Material for Low Dielectric Constant Applications

MRS Proceedings ◽

10.1557/proc-511-111 ◽

1998 ◽

Vol 511 ◽

Cited By ~ 2

Author(s):

Edward D. Birdsell ◽

Rosario A. Gerhardt

Keyword(s):

Spin Coating ◽

Colloidal Silica ◽

Sol Gel ◽

Gelation Time ◽

Porous Silica ◽

Low Dielectric Constant ◽

Low Dielectric ◽

Sol Gel Process ◽

Gel Composition ◽

Highly Porous

ABSTRACTHighly porous (15% dense) silica thin films with k < 2.2 have been produced using a colloidal sol-gel process. This process uses relatively inexpensive, commercially available colloidal silica and potassium silicate. These films were deposited by spin coating. The parameters for spin coating (spin speed, gelation time, gel composition, etc.) have been optimized and coherent films with thicknesses ranging from 0.7–2.0 μm can be reproducibly fabricated. Preliminary work shows that the porosity of these films ranges from a few rn to < 1 μm. The dielectric properties were examined for frequencies up to 1 MHz. Compatibility of the films with IC processing was also investigated.

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