Preparation of low-density carbon aerogels by ambient pressure drying

Carbon ◽  
2004 ◽  
Vol 42 (10) ◽  
pp. 2033-2039 ◽  
Author(s):  
Dingcai Wu ◽  
Ruowen Fu ◽  
Shuting Zhang ◽  
Mildred S Dresselhaus ◽  
Gene Dresselhaus
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Carbon Aerogels ◽  
Low Density

Preparation of low-density porous silica thin films by ambient pressure drying

2004 ◽  
Author(s):  
Lanfang Yao ◽  
Jun Shen ◽  
Guangming Wu ◽  
Xingyuan Ni ◽  
Jue Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Ambient Pressure ◽  
Porous Silica ◽  
Ambient Pressure Drying ◽  
Low Density ◽  
Silica Thin Films

scholarly journals Ambient Pressure-Dried Graphene–Composite Carbon Aerogel for Capacitive Deionization

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 29 ◽  
Author(s):  
Chen Zhang ◽  
Xiaodong Wang ◽  
Hongqiang Wang ◽  
Xueling Wu ◽  
Jun Shen
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Precursor Solution ◽  
Surface Characteristics ◽  
Carbon Aerogel ◽  
Ambient Pressure Drying ◽  
Carbon Aerogels ◽  
Capacitive Deionization ◽  
Graphene Composite ◽  
Composite Carbon

Capacitive deionization (CDI) technology possessing excellent desalination performance and energy efficiency is currently being widely studied in seawater desalination. In this work, the graphene–composite carbon aerogels (GCCAs) easily prepared by an ambient pressure drying method served as electrodes to remove salt ions in aqueous solution by CDI. The microstructure of the obtained GCCAs was found to depend on the component content in the precursor solution, and could be controlled through varying the mass ratio of resorcinol and formaldehyde to graphene oxide (RF/GO). The surface characteristics and microstructure of GCCAs were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). In addition, the electrochemical tests and CDI experiments of GCCA electrodes were conducted in NaCl solution. Thanks to the reasonable pore structure and highly conductive network, GCCA-150 achieved the best salt adsorption capacity of 26.9 mg/g and 18.9 mg/g in NaCl solutions with concentrations of 500 mg/L and 250 mg/L, respectively.

Optimized synthesis of carbon aerogels via ambient pressure drying process as electrode for supercapacitors

2015 ◽  
Vol 30 (6) ◽  
pp. 1325-1331 ◽  
Author(s):  
Lei Yuan ◽  
Lijuan Chang ◽  
Zhibing Fu ◽  
Xi Yang ◽  
Xingli Jiao ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Ambient Pressure Drying ◽  
Carbon Aerogels ◽  
Drying Process

Preparation Of Low-Density Xerogels At Ambient Pressure For Low K Dielectrics

1995 ◽  
Vol 381 ◽  
Author(s):  
D. M. Smith ◽  
J. Anderson ◽  
C. C. Cho ◽  
G. P. Johnston ◽  
S. P. Jeng
Keyword(s):  
Dielectric Constant ◽  
Ambient Pressure ◽  
Supercritical Drying ◽  
Temperature Limit ◽  
Ambient Pressure Drying ◽  
Low Dielectric Constant ◽  
Low Density ◽  
Silica Xerogels ◽  
High Temperature Limit ◽  
Low Dielectric

AbstractLow density silica xerogels have many properties which suggest their use as a low dielectric constant material. Recent process improvements to control capillary pressure and strength by employing aging and pore chemistry modification, such that shrinkage is minimal during ambient pressure drying, have eliminated the need for supercritical drying. Although xerogels offer advantages for intermetal dielectric (IMD) applications because of their low dielectric constant (<2), high temperature limit, and compatibility with existing microelectronics precursors and processes, they suffer from unanswered questions. These include: 1) are all pores smaller than microelectronics features, 2) what are their mechanical properties (for processing and particle generation), and 3) what is their thermal stability. We have produced bulk xerogels under similar conditions to those used for films and studied the effect of density on the pore size distribution and bulk modulus.

Study on Preparation of Mesoporous Silica Aerogels with Low Density and High Properties via Ambient Pressure Drying

2010 ◽  
Vol 148-149 ◽  
pp. 1491-1496
Author(s):  
Gang Qiang Geng ◽  
Wei Tao Bi ◽  
Yu Zhang ◽  
Deng Ke Sun
Keyword(s):  
Mesoporous Silica ◽  
Ambient Pressure ◽  
Sol Gel ◽  
Silica Aerogels ◽  
Ambient Pressure Drying ◽  
Ethanol Solution ◽  
Low Density ◽  
Micro Structure ◽  
Gel Time

The SiO2 aerogels of low density was fabricated by ion exchange and sol-gel method on the basis of sodium silicate. The effect of pH, aging，addition of DCCA and annealed temperature on the gel time, aerogel density, porosity and the micro-structure was systemly studied. The results showed that when the pH is 5, aging was 30%Vol .of TEOS/ethanol solution ,the addition of DCCA was 1.5ml, the gel system was annealed at 50 for 84 h, 60 for 72h, the best quality of silica aerogels with low density (0.14g/cm3), higher specific surface(610.643 m2/g) and pore size of 20~40 nm can be obtained.

Sign in / Sign up

Export Citation Format

Share Document