نوع مقاله : پژوهشی
نویسندگان
1 استادیار سازمان تحقیقات، آموزش و ترویج کشاورزی، موسسه تحقیقات برنج کشور، رشت، ایران
2 دانشجوی دکتری مدیریت منابع خاک – فیزیک خاک و حفاظت خاک، دانشکده کشاورزی، دانشگاه گیلان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Rice husk, as one of the abundant agricultural by-products in rice-producing countries, contains a significant amount of silica that, with proper processing, can serve as a valuable source for the production of silica nanoparticles. The necessity of this study arises from the fact that utilizing inexpensive and readily available biological resources not only reduces environmental pollution caused by the disposal of agricultural waste but also plays an important role in developing green technologies and promoting sustainable land management. The present study aimed to extract and characterize silica nanoparticles derived from rice husk and to evaluate their properties and moisture content. Fourier-transform infrared spectroscopy (FTIR) analysis confirmed the presence of characteristic Si–O–Si and Si–OH bands, indicating an amorphous structure and high surface activity of the nanoparticles. Field emission scanning electron microscopy (FESEM) images revealed uniformly spherical particles ranging from 8 to 24 nm, with an average particle size of 15.56 nm. The specific surface area of the nanoparticles was determined to be 178.5 m²/g, with a moisture content of 1.84% and a production yield of approximately 35%. The results demonstrated that the employed method, through controlled acid leaching and calcination conditions, was capable of producing silica nanoparticles with high purity, large surface area, and desirable structural stability.
کلیدواژهها [English]
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