Document Type : Research Paper

Authors

1 Agricultural Sciences and Natural Resources of Gorgan University ,Gorgan, Iran

2 Agricultural Sciences and Natural Resources of Gorgan University, Gorgan, Iran

3 Agricultural Sciences and Natural Resources of Gorgan University , Gorgan, Iran

Abstract

Rice is one of the essential food items; the agricultural residue obtained from it is rice husk. Most of the rice husk ash (87-98%) is composed of silica. Application of rice husk as a raw material for the synthesis of silica, compared to other methods, reduces environmental pollution and energy consumption. It is also economically viable due to its low cost. Silica is used as a nanocarrier in the nanoencapsulation of bioactive and pharmaceutical compounds due to its unique properties, such as its high specific surface area and uniform porosity. For this purpose, mesoporous silica nanoparticles were synthesized from rice husk by heat degradation at three calcination temperatures of 400, 600, and 800°C and glycerol mixing temperatures of 200, 225, and 250°C. Calcined silica at 600°C and 200°C glycerol were considered the optimal samples. This sample had a high purity (containing 94.07% silica) and an amorphous structure (2θ=22). The response surface method (RSM) was used to determine the optimal sample. Moreover, its particle size was 252 nm, as determined by dynamic light scattering. In addition, its specific surface area was high (51.653 m2 g-1).
 

Keywords

Main Subjects

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