Synthesis of biogenic silicon/silica (Si/SiO₂) nanocomposites from rice husks and wheat bran through various microorganisms

Green synthesis of silver/silica nanocomposite in seconds at room temperature using reducing agents obtained from silicon nanoparticles

“…04-0783) of metallic Ag NPs [20]. Also, the figure displays a hump between 16° and 34° that suggests that the SiO 2 has an amorphous nature and agrees with the reported JCPDS data (JCPDS 29-0085) [4]. Results indicate the formation of Ag crystalline structures and amorphous SiO 2 , but no Si crystal is detected.…”

“…These systems show a fast response and large nonlinear absorption near the surface plasmon resonance (SPR) frequency of metal particles [2,3]. The metal NPs SPR depends on the size, shape, local dielectric environ ment and metal volume fraction [4]. In the last decade, many researchers have reported on their studies of the nonlinear optical properties of silver or gold NPs embedded in different dielectric matrices [2,5].…”

Rice husk-derived nano-SiO2assembled on reduced graphene oxide distributed on conductive flexible polyaniline frameworks towards high-performance lithium-ion batteries

“…9,14,15 Following the addition of SiO 2 , a broad peak at 25.4 corresponds to amorphous silica (JCPDS no 29-0085), indicating the amorphous nature of the powders. [16][17][18] Meanwhile, the peak intensity of rGO is weakening, indicating that the SiO 2 layer has been coated on rGO. 19 The XRD patterns for PANI-SiO 2 @rGO revealed representative peaks of bare PANI at 15.0 , 20.1 , 24.8 , 26.7 , which correspond respectively to (011), (020), (200), and (121) crystal planes of PANI in the emeraldine salt form (JCPDS no 53-1717 & 53-1891).…”

Greening the pathways: a comprehensive review of sustainable synthesis strategies for silica nanoparticles and their diverse applications

“…In the size range of 232 to 250 nm in which all these microorganisms biotransform amorphous silica from a natural source to crystalline silica in less than 24 hours. 56 In comparison to SiNPs made using chemical procedures, the purity of the SiNPs produced using the various green methods discussed is noticeably higher and generate much lower amount hazardous byproducts. Although, the synthesis process may take longer time, there are many other advantages associated with those bio-synthesized nanoparticles.…”