Nanosilicon powder extraction as a sustainable source (from Iraqi rice husks) by hydrothermal process

• Main Authors: Zedin, Naser Korde, Ajeel, Sami Abualnoun, Sukkar, Khalid A.
• Format: Conference Proceeding
• Language: English
• Subjects: Aluminum; Aluminum chloride; Atomic force microscopy; Autoclaving; Leaching; Low temperature; Molten salts; Nanoparticles; Particle size; Purity; Reduction (metal working); X ray fluorescence analysis
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0000147

The High-purity silicon nanoparticles (SiNPs) were successfully produced by hydrothermal process (low temperature molten salt process) from nanosilica. The used nanosilica was extracted from Iraq agriculture sources by precipitation process. (SiNPs) was prepared via the reduction of nanosilica by metallic Al in molten AlCl3 inside steal autoclave at temperatures 200 and 250 °C. The obtained powder was leaching with 1MHCl for several hours then leaching with 10% HF for 10 min. The structural properties of the obtained (SiNPs) were analyzed and measured by X-ray fluorescence (XRF) and X-ray diffraction (XRD). The size of the obtained particles were measured by using Atomic force microscopy (AFM). The results indicated that, the combination between hydrothermal Process and specific chemical leaching process is considered as an efficient method for obtaining (SiNPs) at both 200 °C and 250 ◦C. also the results show the high purity nanosilicon (99.94 %) was obtained at 250 °C. at 200 °C, The particle size of (SiNPs) were 46 nm. The particle size was increasing to 59 nm with rising the temperature to 250 °C.