Synthesis of silica from rice husk using acid pretreatment and its characterization

Wee, Nik Nur Atiqah Nik; Samsuri, Alinda; Latif, Mohd Nor; Yunus, Wan Md Zin Wan

doi:10.1063/1.5089367

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The N–H stretching band at 3435 cm −1 and the stretching vibration of the amide C=O group at 1652 cm −1 are the characteristic peaks unique to AFs. Compared to the spectrum of the untreated AF, the modified AFs display two new adsorption peaks around 1089 and 800 cm −1 caused by the symmetric and asymmetric stretching vibrations of Si–O–Si bonds, respectively [38,39,40]. The oxygen atoms attributed to the silica in these bands are set up to bridge between each two silicon sites.…”

Section: Resultsmentioning

confidence: 99%

Growing Nano-SiO2 on the Surface of Aramid Fibers Assisted by Supercritical CO2 to Enhance the Thermal Stability, Interfacial Shear Strength, and UV Resistance

et al. 2019

View full text Add to dashboard Cite

Aramid fibers (AFs) with their high Young′s modulus and tenacity are easy to degrade seriously with ultraviolet (UV) radiation that leads to reduction in their performance, causing premature failure and limiting their outdoor end use. Herein, we report a method to synthesize nano-SiO2 on AFs surfaces in supercritical carbon dioxide (Sc-CO2) to simultaneously improve their UV resistance, thermal stability, and interfacial shear strength (IFSS). The effects of different pressures (10, 12, 14, 16 MPa) on the growth of nanoparticles were investigated. The untreated and modified fibers were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). It was found that the nano-SiO2-decorated fibers exhibited improvement of thermal stability and mechanical properties, and the IFSS of the nano-SiO2 modified fibers increases by up to 64% compared with the untreated fibers. After exposure to 216 h of UV radiation, the AFs-UV shows a less decrease in tensile strength, elongation to break and tensile modulus, retaining only 73%, 91%, and 85% of the pristine AFs, respectively, while those of AFs-SiO2-14MPa-UV retain 91.5%, 98%, and 95.5%. In short, this study presents a green method for growing nano-SiO2 on the surface of AFs by Sc-CO2 to enhance the thermal stability, IFSS, and UV resistance.

show abstract

Section: Resultsmentioning

confidence: 99%

Growing Nano-SiO2 on the Surface of Aramid Fibers Assisted by Supercritical CO2 to Enhance the Thermal Stability, Interfacial Shear Strength, and UV Resistance

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The co-purified extraction process of nano-cellulose [34] Rice straw Alkaline hydrolysis pre-treatment [35] agriculture waste. HCl solution was used during the acid leaching process for agriculture waste and was calcined at 600 °C to produce amorphous silicon [46]. The final product exhibits similar purity with a range of 99.5% silicon compared to agriculture waste treated with HCl.…”

Section: Pineapple Peelsmentioning

confidence: 99%

Potential of nanosilicon dioxide extraction from silicon-rich agriculture wastes as a plant growth promoter

Ibrahim¹,

Meng²,

Alipour³

et al. 2022

Adv. Nat. Sci: Nanosci. Nanotechnol.

View full text Add to dashboard Cite

Agriculture waste has attracted attention as a potential source to produce raw material silicon dioxide, either crystalline (pyrophyllite) or amorphous form (geothermal sludge). It is an unwanted waste produced as a desired result of agricultural activities. Nanosilicon dioxide has undoubtedly gained eager interest in many vital industries. It is renowned for positively enhancing outstanding performance due to tuneable properties over its bulk counterpart. Silicon dioxide scientifically demonstrates a unique ability to convert efficiently into economic value from silicon-rich agriculture waste. Thus, a noble extraction from silicon-rich waste is undoubtedly gaining enormous attention. However, adequate knowledge on local optimisation of nanosilicon dioxide extraction from silicon-rich agriculture waste is lacking. Specific aims of this comprehensive review mainly highlighted a synthesis method of potential nanostructured silicon dioxide from agriculture waste and their potential applications for plant growth promoters. Reverse microemulsion, chemical vapour condensation, solid gelation, and mechanochemical are preferred methods that were typically specified to focus this comprehensive review critically. Optimisation of nanosilicon dioxide can be achieved precisely via the ideal combination of solid gelation and a high-energy ball mill process. Silicon dioxide is undoubtedly an effective agent as a plant growth promoter to overcome biotic and abiotic factors such as heavy metal uptake and translocation, inhibit pathogenic fungi, improve the antioxidant system, and mitigate various stress factors.

show abstract

Synthesis of silica nanoparticles from agricultural waste

Akhayere

Kavaz

2022

Agri-Waste and Microbes for Production of Sustainable Nanomaterials

View full text Add to dashboard Cite

Synthesis of silica from rice husk using acid pretreatment and its characterization

Cited by 3 publications

References 8 publications

Growing Nano-SiO2 on the Surface of Aramid Fibers Assisted by Supercritical CO2 to Enhance the Thermal Stability, Interfacial Shear Strength, and UV Resistance

Growing Nano-SiO2 on the Surface of Aramid Fibers Assisted by Supercritical CO2 to Enhance the Thermal Stability, Interfacial Shear Strength, and UV Resistance

Potential of nanosilicon dioxide extraction from silicon-rich agriculture wastes as a plant growth promoter

Synthesis of silica nanoparticles from agricultural waste

Contact Info

Product

Resources

About