A Study on the Water Absorption Efficiency of Porous Silica Gel Prepared from Rice Husk Ash

2017 ◽  
Vol 14 (1) ◽  
pp. 83-86
Author(s):  
U. Parida ◽  
T.K. Bastia ◽  
B.B. Kar
Keyword(s):  
Water Absorption ◽  
Silica Gel ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Porous Silica ◽  
Absorption Efficiency ◽  
Porous Silica Gel

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.

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

2008 ◽  
Vol 62 (10-11) ◽  
pp. 1476-1479 ◽  
Author(s):  
T. Witoon ◽  
M. Chareonpanich ◽  
J. Limtrakul
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Sol Gel ◽  
Porous Silica ◽  
Sol Gel Process

Hydrothermal Synthesis of TiO2/SiO2 Hybrid Photocatalyst from Rice Husk Ash

2007 ◽  
Vol 352 ◽  
pp. 281-285 ◽  
Author(s):  
P. Sujaridworakun ◽  
Supatra Jinawath ◽  
W. Panpa ◽  
Akira Nakajima ◽  
Masahiro Yoshimura
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Uv Light ◽  
Porous Silica ◽  
Chemical Properties ◽  
Nano Crystalline ◽  
Ultraviolet Ray ◽  
Physical And Chemical ◽  
Hydrolysis Of ◽  
Fine Tio2

Photocatalyst materials were prepared as a hybrid between TiO2 /SiO2 via low temperature hydrothermal method (150oC) without further heat treatment. Porous silica from rice husk ash was used as a support for fine TiO2 particles which acted as a photocatalyst when radiated with a UV light. TiO2-deposited SiO2 was successfully prepared through hydrolysis of TiOSO4 solution by controlling synthesis parameters such as pH ,concentration of TiOSO4, temperature and time under hydrothermal treatment. The obtained products were characterized for physical and chemical properties by means of XRD, XRF, BET and TEM . It was found that pH had an influence on the crystallization of TiO2, and under an appropriated pH, only anatase presented along with amorphous phase. High crystallinity of nano-crystalline anatase ( about 5 nm) deposited on silica surface was observed through TEM. Adsorption and photocatalytic performances of the prepared catalyst were evaluated in methylene blue aqueous solution in the dark and under ultraviolet ray irradiation, respectively. Due to the synergetic functions of adsorption by porous substrate and decomposition by TiO2 photocatalyst, an enhancing of photocatalytic activity for decomposition of organic pollutants in water under UV rays was obtained.

scholarly journals Hydrochloric Acid Pretreatment of Different Types of Rice Husk Ash Influence on the Properties of Cement Paste

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1524 ◽  
Author(s):  
Jing Liu ◽  
Chunyan Xie ◽  
Chao Fu ◽  
Xiuli Wei ◽  
Dake Wu
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Cement Paste ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Control Sample ◽  
Control Group ◽  
Rice Husks ◽  
Acid Pretreatment ◽  
Blank Control Group

When properly processed, rice husk ash (RHA) comprises a large amount of SiO2, which exhibits a high pozzolanic activity and acts as a good building filler. In this paper, the effects of rice husk ash content, acid pretreatment, and production regions on the compressive and flexural properties and water absorption of a cement paste were studied. The experimental results showed that the compressive strength of the rice husk ash was the highest with a 10% content level, which was about 16.22% higher than that of the control sample. The rice husk after acid pretreatment displayed a higher strength than that of the sample without the acid treatment, and the rice husk from the Inner Mongolia region indicated a higher strength than that from the Guangdong province. However, the flexural strength of each group was not significantly different from that of the blank control group. The trend observed for the water absorption was similar to that of the compressive strength. The variation in the RHA proportions had the greatest influence on the properties of the paste specimens, followed by the acid pretreatments of the rice husks. The production regions of the rice husks indicated the least influence.

Diffusion of gases in porous silica gel

1995 ◽  
Vol 190 (3) ◽  
pp. 206-211 ◽  
Author(s):  
S. Satoh ◽  
I. Matsuyama ◽  
K. Susa
Keyword(s):  
Silica Gel ◽  
Porous Silica ◽  
Porous Silica Gel ◽  
Diffusion Of Gases

Photosynthesis within porous silica gel: viability and activity of encapsulated cyanobacteria

2008 ◽  
Vol 18 (24) ◽  
pp. 2833 ◽  
Author(s):  
Joanna Claire Rooke ◽  
Alexandre Léonard ◽  
Hugo Sarmento ◽  
Jean-Pierre Descy ◽  
Bao-Lian Su
Keyword(s):  
Silica Gel ◽  
Porous Silica ◽  
Porous Silica Gel
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