High-purity nano silica powder from rice husk using a simple chemical method

Yuvakkumar, R.; Elango, V.; Rajendran, V.; Kannan, N.

doi:10.1080/17458080.2012.656709

Cited by 173 publications

(70 citation statements)

References 26 publications

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“…A similar result was reported by Chakraverty and Kaleemullah who observed that the ash samples treated with acid before calcination did not have any sharp peaks and reported that the sample was amorphous in nature. Yuvakkumar et al reported that broad peak at 2Θ angle of 22° denoted the amorphous nature of silica. For confirmation of the result obtained from XRD analysis, RHA sample was further analyzed using SEM and the SEM micrograph is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Nayak

Nandi

Datta

2019

Engineering Reports

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In the present study, an attempt has been made to extract commercial grade amorphous silica nanoparticles from rice husk (RH) using four different chemicals (NaOH, KOH, Na2CO3, and K2CO3) and two washing solvents (water and ethanol). The elemental, structural, and morphological characterizations of the silica samples were carried out using scanning electron microscopy coupled with energy‐dispersive X‐ray spectroscopy (SEM‐EDS), atomic absorption spectrometry (AAS), X‐ray diffraction (XRD), and Fourier‐transform infrared spectroscopy (FTIR). The combined NaOH and water treatment was found to be the most efficient method in terms of recovery of silica sample, while combined Na2CO3 and water treatment was more suitable for obtaining pure silica. No significant difference in the percentage recovery of silica was observed between the two washing treatments at p < 0.05. Scanning electron micrographs of the Na2CO3‐cum‐water and K2CO3‐cum‐water treated samples showed nonagglomerated silica nanoparticles. The XRD analysis of silica obtained from these two treatments was also free from any sharp peaks illustrating pure amorphous structure of silica. EDS and AAS study of K2CO3‐cum‐water treated samples showed higher mineral impurities compared to Na2CO3‐cum‐water treated sample. It could be inferred that silica obtained from Na2CO3 and water washing treatment can be used for extraction of metallurgical grade silicon.

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Section: Resultsmentioning

confidence: 99%

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Nayak

Nandi

Datta

2019

Engineering Reports

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“…The band at 957 cm −1 for BSW sample is due to the presence of silanol group Si-OH bending vibration absorption [27,29]. According to the TGA thermogram (Figure 7), BS sample also has the silanol group in its structure; however the silanol band was probably overlaid by the C-C stretching band at 925 cm −1 .…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

“…The presence of band about 790-797 cm −1 for BS and BSW samples was due to Si-O-Si symmetric stretching [21,29]. The bands at 615, 645, 925, 1415, and 1560 cm −1 , for BS sample, were due to the presence of sodium acetate (CH 3 COONa), which is impurity of the synthesis process [30].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Green Synthesis and Characterization of Biosilica Produced from Sugarcane Waste Ash

Alves

Reis

Rovani

et al. 2017

Journal of Chemistry

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In this study, ash from sugarcane waste was used in the synthesis of biosilica using alkaline extraction followed by acid precipitation. Different parameters that could influence the silica particle synthesis were evaluated. The ash and synthesized biosilica were characterized by a combination of spectroscopic and chemical techniques such as XRD, XRF, SEM, particle size analyser, N 2 adsorption analysis, TGA, and FTIR. The best condition for biosilica production was achieved with fusion method and aging temperature of 80 ∘ C for 1 h during gel formation. X-ray powder diffraction pattern confirms the amorphous nature of synthesized silica. The purity of the prepared silica was 99% silica which was confirmed by means of XRF. The experimental data suggest that the sugarcane waste ash could be converted into a value-added product, minimizing the environmental impact of disposal problems.

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“…Later, the leaves were dried and leaf powder was heated in the muffle furnace at 1023 K in an indigenous high temperature for 3 h. The obtained bamboo leaf ash (BLA) was treated with 6 N HCl under stirring at 343 K for 1.5 h to filter gathered impurities. Silica nanoparticles were extorted from BLA by means of acid precipitation process followed by alkali extraction (Palanivelu et al 2014;Yuvakkumar et al 2014). Then, the ash was rinsed for three times with distilled water to acquire the pH value 7.0.…”

Section: Extraction Of Nanosilicamentioning

confidence: 99%

A lucrative chemical processing of bamboo leaf biomass to synthesize biocompatible amorphous silica nanoparticles of biomedical importance

Rangaraj¹,

Rajendran²

2017

Appl Nanosci

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Synthesis of silica nanoparticles from natural resources/waste via cost effective route is presently one of the anticipating strategies for extensive applications. This study reports the low-cost indigenous production of silica nanoparticles from the leftover of bamboo (leaf biomass) through thermal combustion and alkaline extraction, and examination of physico-chemical properties and yield percentage using comprehensive characterization tools. The outcome of primed silica powder exhibits amorphous particles (average size: 25 nm) with high surface area (428 m 2 g -1 ) and spherical morphology. Despite the yield percentage of silica nanoparticles from bamboo leave ash is 50.2%, which is less than rice husk ask resources (62.1%), the bamboo waste is only an inexpensive resource yielding high purity (99%). Synthesis of silica nanoparticles from natural resources/waste with the help of lucrative route is at present times one of the anticipating strategies for extensive applications. In vitro study on animal cell lines (MG-63) shows non-toxic nature of silica nanoparticles up to 125 lg mL -1 . Hence, this study highlights the feasibility for the mass production of silica nanoparticles from bamboo leave waste rather using chemical precursor of silica for drug delivery and other medical applications.

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High-purity nano silica powder from rice husk using a simple chemical method

Cited by 173 publications

References 26 publications

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Green Synthesis and Characterization of Biosilica Produced from Sugarcane Waste Ash

A lucrative chemical processing of bamboo leaf biomass to synthesize biocompatible amorphous silica nanoparticles of biomedical importance

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