Development of high purity amorphous silica from emulsifier silicon by pyrolysis process at temperature of 700 ^oC

Abstract

Silica in amorphous form is one of the fillers that is indispensable for the industrial world, especially for the superior material industry. Amorphous silica in the form of cristobalite compounds are inert, soft, and have high porosity which is suitable to be used as certain filler materials. This research describes about the characterization of amorphous silica produced from the pyrolysis process of emulsifier silicon. The pyrolysis process was carried out in three-stages, starting from the separation of water, separation of the emulsifier material from silica compound at a temperature of 300oC followed by pyrolysis at a temperature of 700 oC. In this process, amorphous silica and carbon are formed at the end of the pyrolysis process. In this study, characterization was carried out using XRD to determine the phase of the composition of the compound, SEM EDX to determine the morphology, and XRF analysis to determine the purity of product composition. The results of the XRD shows that the amorphous silica formed. SEM-EDX analysis shows that the amorphous silica has spherical fine grain with average particle size 0.30006 ± 0.01722 |am. It was supported by XRF analysis that shows that the amorphous silica has SiO2 content 99,92%.

Silica-Ti3C2Tx MXene Nanoarchitectures with Simultaneous Adsorption and Photothermal Properties

“…After treatment with CTAB and TMOS driving to the MXene-CTAB-SiO2 intermediate nanocomposite, the diffraction peak assigned to the (002) plane widens further, while a broad hump appears centred at approximately 22º (2θ degrees), which is characteristic of the amorphous silica produced by the hydrolysis of the alkoxides (TMOS), in accordance with the Standards Joint Committee on Powder Diffraction (JCPDS) corresponding to the standard pattern of amorphous SiO2. [34] The presence of CTAB is evidenced from the ATR spectra, showing the characteristic peaks at 2922, 2850, and 1460 cm -1 that are respectively assigned to the asymmetric and symmetric stretching vibrations of C-H (νasym(-CH2) and νs(-CH2)) and δ (-CH2) bending vibrations of methylene groups in the CTA + species assembled to the MXene. The intense IR bands at around 1060 cm -1 are attributed to the νSi-O stretching vibrations of silica siloxane bonds.…”

Production of complex Fe-Si-Mn-Cr ferroalloy using high-ash coal: a sustainable metallurgical approach

“…The slag composition is as follows, %: 43.62 SiO , typical for this composition, are not formed in the slag due to the relatively low smelting temperature of the alloy and the cooling rate [7]. The amorphous background observed is clearly indicative of an SiO2-based phase [28].…”