Adjusting SiO2 : C mole ratios in rice hull ash (RHA) to control carbothermal reduction to nanostructured SiC, Si3N4 or Si2N2O composites

2021 ◽  
Vol 23 (19) ◽  
pp. 7751-7762
Author(s):  
Mengjie Yu ◽  
Eleni Temeche ◽  
Sylvio Indris ◽  
Richard M. Laine
Keyword(s):  
Carbon Source ◽  
Carbothermal Reduction ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
External Carbon Source ◽  
Unconventional Method

SiO2 : C mole ratios in RHA are controlled using an unconventional method, by which nanocomposites are synthesized via carbothermal reduction exploiting the intrinsic nanoscale SiO2 and carbon with no need for adding an external carbon source.

Water filtration using rice hull ash

Waterlines ◽  
1983 ◽  
Vol 2 (2) ◽  
pp. 21-23 ◽  
Author(s):  
Barnes ◽  
Mampitiyarachichi
Keyword(s):  
Water Filtration ◽  
Rice Hull ◽  
Rice Hull Ash

scholarly journals Solid Reactant-Based Geopolymers from Rice Hull Ash and Sodium Aluminate

2016 ◽  
Vol 8 (6) ◽  
pp. 2131-2140 ◽  
Author(s):  
Ailar Hajimohammadi ◽  
Jannie S. J. van Deventer
Keyword(s):  
Sodium Aluminate ◽  
Rice Hull ◽  
Rice Hull Ash ◽  
Solid Reactant

Enhancing denitrification efficiency for nitrogen removal using waste sludge alkaline fermentation liquid as external carbon source

2018 ◽  
Vol 26 (5) ◽  
pp. 4633-4644 ◽  
Author(s):  
Mengyu Shao ◽  
Liang Guo ◽  
Zonglian She ◽  
Mengchun Gao ◽  
Yangguo Zhao ◽  
...  
Keyword(s):  
Carbon Source ◽  
Nitrogen Removal ◽  
Waste Sludge ◽  
External Carbon Source ◽  
Fermentation Liquid

Preparation of Amorphous Nanosilica from Philippine Waste Rice Hull via Acid Precipitation Method

2016 ◽  
Vol 864 ◽  
pp. 112-116
Author(s):  
Rinlee Butch M. Cervera ◽  
Emie A. Salamangkit-Mirasol
Keyword(s):  
Electron Microscopy ◽  
Low Cost ◽  
Agricultural Waste ◽  
Acid Precipitation ◽  
Particle Size Analysis ◽  
Precipitation Method ◽  
Rice Hull ◽  
Size Analysis ◽  
Rice Hull Ash ◽  
Transmission Electron

Rice hull or rice husk (RH) is an agricultural waste obtained from milling rice grains. Since RH has no commercial value and is difficult to use in agriculture, its volume is often reduced through open field burning which is an environmental hazard. In this study, amorphous nanosilica from Philippine waste RH was prepared via acid precipitation method. The synthesized samples were fully characterized for its microstructural properties. X-ray diffraction pattern reveals that the structure of the prepared sample is amorphous in nature while Fourier transform infrared spectrum showed the different vibration bands of the synthesized sample. Scanning electron microscopy (SEM) and particle size analysis (PSA) confirmed the presence of agglomerated silica particles. On the other hand, transmission electron microscopy (TEM) revealed an amorphous sample with grain sizes of about 5 to 20 nanometer range and has about 95 % purity according to EDS analyses. The elemental mapping also suggests that leaching of rice hull ash effectively removed the metallic impurity such as potassium element in the material. Hence, amorphous nanosilica was successfully prepared via a low-cost acid precipitation method from Philippine waste rice hull.

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