Silica–titania aerogel monoliths with large pore volume and surface area by ambient pressure drying

2009 ◽  
Vol 52 (3) ◽  
pp. 328-334 ◽  
Author(s):  
P. R. Aravind ◽  
P. Shajesh ◽  
P. Mukundan ◽  
K. G. K. Warrier
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Large Pore ◽  
Large Pore Volume

An approach to carbon nanotubes with high surface area and large pore volume

2007 ◽  
Vol 100 (1-3) ◽  
pp. 1-5 ◽  
Author(s):  
Jun Jie Niu ◽  
Jian Nong Wang ◽  
Ying Jiang ◽  
Lian Feng Su ◽  
Jie Ma
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Large Pore ◽  
Large Pore Volume

A novel mesoporous hydrogen-bonded organic framework with high porosity and stability

2020 ◽  
Vol 56 (1) ◽  
pp. 66-69 ◽  
Author(s):  
Bin Wang ◽  
Xiu-Liang Lv ◽  
Jie Lv ◽  
Li Ma ◽  
Rui-Biao Lin ◽  
...  
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
High Porosity ◽  
Thermally Stable ◽  
Large Pore ◽  
Large Pore Volume ◽  
Organic Framework ◽  
Hydrogen Bonded

A highly chemically and thermally stable mesoporous hydrogen-bonded organic framework with a high surface area and a large pore volume has been rationally designed and constructed.

Synthesis of ordered mesoporous boron-doped γ-alumina with high surface area and large pore volume

2016 ◽  
Vol 178 ◽  
pp. 248-251 ◽  
Author(s):  
Guohui Cai ◽  
Xiaohai Zheng ◽  
Yong Zheng ◽  
Yihong Xiao ◽  
Ying Zheng
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Boron Doped ◽  
Large Pore ◽  
Ordered Mesoporous ◽  
Large Pore Volume

Pore Structure Characterization of TiO2-SiO2 Composite Aerogel Prepared via Ambient Pressure Drying by Sol Pre-Modification Process

2012 ◽  
Vol 534 ◽  
pp. 101-105 ◽  
Author(s):  
Jing Xiao Liu ◽  
Lu Nan Bai ◽  
Fei Shi ◽  
Zhi Qiang Hu ◽  
Yan Yan Jiang ◽  
...  
Keyword(s):  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Ambient Pressure ◽  
Volume Ratio ◽  
Ambient Pressure Drying ◽  
Composite Aerogel ◽  
Composite Aerogels

In this paper, TiO2-SiO2composite aerogels were prepared via ambient pressure drying by sol-gel and sol pre-modification method. The pre-modification solution consists of hexamethyldisiloxane (HMDSO) as buffering agent, trimethylchlorosilane (TMCS) as modifier and hexane as organic solvent. The pore structure of TiO2-SiO2composite aerogels was characterized by N2adsorption-desorption method. The effects of HMDSO/TMCS volume ratio on the pore structure and properties of TiO2-SiO2composite aerogel were studied. The results indicate that the pre-modification of TiO2-SiO2composite sol by adding HMDSO/TMCS/Hexane solution could shorten the preparation period. Increasing the amount of HMDSO is favorable for obtaining TiO2-SiO2composite aerogel with higher specific surface area and pore volume. The best volume ratio of HMDSO/TMCS/composite sol for preparing mesoporous TiO2-SiO2composite aerogels were 12:6:120 and 12:12:120, with which the specific surface area and pore volume of the obtained TiO2-SiO2composite aerogel are 425.2～645.4 m2/g and 0.80～2.85 m3/g, respectively.

Preparation and Properties of Hydrophobic Silica Aerogels by Ambient Pressure Drying Method

2011 ◽  
Vol 71-78 ◽  
pp. 1040-1043
Author(s):  
Hui Wang ◽  
Shi Ming Liu ◽  
Ling Ke Zeng
Keyword(s):  
Surface Area ◽  
Ambient Pressure ◽  
High Surface ◽  
High Surface Area ◽  
Volume Ratio ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Drying Method ◽  
Hydrophobic Properties ◽  
Large Pore Volume

Silica alcogels were prepared by hydrolysis with hydrochloric acid and condensation with NH4OH of ethanol diluted tetraethylorthosilicate (TEOS) precursor and trimethylchlorosilane and hexane as surface modifying agent. The physical properties such as density, appearance, hydrophobicity, surface area, pore size distribution and thermal stability were measured. It was found that the physical and hydrophobic properties of the silica aerogels depend on the TMCS/hexane (V) volume ratio. The density decreased with increase ofV, and the aerogels are more hydrophobic asV=3%. The aerogels were thermally stable up to a temperature of 350 °C, and the aerogel prepared has a high surface area and large pore volume.

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