Synthesis of silica from rice husk by sol-gel method

Setyawan, Nova Dany; Hoerudin,; Yuliani, Sri

doi:10.1088/1755-1315/733/1/012149

Cited by 14 publications

(13 citation statements)

References 12 publications

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“…As a result, a synthesized quartz powder with total metallic impurities of 74.1 ppb was achieved with HCl cleaning for 1 h, indicating that this level of purity can satisfy the requirements of advanced semiconductor processes beyond design rule 3 nm. In particular, a synthesized quartz powder in this experiment showed far superior purity than other amorphous silica particles, as shown in Supplementary Table S1 [ 40 , 41 , 42 , 43 , 44 ].…”

Section: Resultsmentioning

confidence: 90%

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

et al. 2023

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Fumed silica-based ultra-high-purity synthetic quartz powder was developed via the sol–gel process to apply to quartz wares and quartz crucibles for use in advanced semiconductor processes. The process conditions of preparing potassium silicate solution, gelation, and cleaning were optimized, i.e., the relative ratio of fumed silica (10 wt%) to KOH (4 wt%) for potassium silicate solution, gelation time 3 h, and cleaning for 1 h with 5 wt% HCl solution. It was observed that the gelation time strongly affected the size distribution of the quartz powder; i.e., a longer gelation time led to a larger size (d50) of the synthesized quartz powder: 157 μm for 2 h and 331 μm for 5 h. In particular, it was found that the morphology of the as-synthesized quartz powder greatly depended on the pulverizing process; i.e., the shape of quartz powder was shown to be rod-shaped for the without-gel-pulverizing process and granular-shaped with the process. We expect that the fumed silica-based ultra-high-purity quartz powder with an impurity level of 74.1 ppb synthesized via the sol–gel process is applicable as a raw material for quartz wares and crucibles for advanced semiconductor processes beyond the design rule of 3 nm.

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Section: Resultsmentioning

confidence: 90%

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

et al. 2023

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“…Analytical grade NaOH, KOH, and HCl were purchased from PT Merck Chemicals and Life Sciences. Food grade SiO2, also used in our previous study [20] was courtesy of a flour industry. Distilled water was used for all processes.…”

Section: Methodsmentioning

confidence: 99%

“…The prewashed and dried RH was carbonized and ashed consecutively in a muffle furnace at 200 o C for 1h and then at 500 o C for 3h to produce rice husk ash (RHA). Extraction of biogenic silica from RHA was carried out using the sol-gel method reported previously [10], [15], [18], [20], [22] with some modifications. About 25g of prepared RHA was mixed with 250mL of 5% aqueous NaOH (w/v) or 5% aqueous KOH (w/v) separately.…”

Section: Extraction Of Biogenic Silica From Rhmentioning

confidence: 99%

“…The successful extraction methods and product characteristics are influenced by many factors, including solvent concentrations, RHA to solvent ratio [15], acid treatment, aging time and temperature [16], gelation pH [16], [17], extraction time and temperature [18], solvent type (NaOH [17], Na2CO3 [19], KOH [20]), feed rate of the precipitant, and mixing speed [21]. In the present study, which was the continuation of our previous works [15], [18], [20], the effectiveness of NaOH or KOH as the extraction solvent in combination with different aging time on the product yield and purity was compared under the same experimental conditions. Further physical, chemical, and microstructural characteristics of the final product were also investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Values=means±SD (n=3); numbers followed by the same letters in the same column were not significantly different at Tukey's test 5%; na = not available *Source: Setyawan et al[20] …”

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Morphology, Extraction Yield, and Properties of Biogenic Silica Nanoparticles from Indonesian Rice Husk as Influenced by Solvent Type and Aging Time

Hoerudin

Setyawan

Suismono

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Rice husk is a rich source of biogenic silica nanoparticles (SNPs) having excellent physico-chemical properties and numerous potential applications. Extraction yield of the biogenic SNPs may be influenced by many factors. In this study, morphology and the influence of solvent type (sodium hydroxide/NaOH, potassium hydroxide/KOH) and aging time (0, 6, 12, 18, 24h) on extraction yield and properties of selected biogenic SNPs from Indonesian rice husk were investigated. The biogenic SNPs were produced by a simple sol-gel method. The presence of biogenic SNP aggregates in the rice husk tissues was successfully identified by SEM-EDX micrographs. NaOH produced better SNPs extraction results than KOH. Aging time for 6h was the optimum condition for production of SNPs. The TEM image showed that SNPs from the best treatment were approximately spheroidal with particle sizes in the range of 20–50nm. The XRD patterns revealed the amorphous nature of the SNPs. Nitrogen adsorption–desorption analysis showed that the SNPs had BET surface area of 235,78m2/g, total pore volume of 0.58cc/g, and average pore radius of 4.91nm. The SNPs exhibited a type IV isotherm and H1 hysteresis loop indicating a characteristic of mesoporous materials. The results suggest that the sol-gel method developed could provide a simple and relatively fast extraction technique producing biogenic amorphous mesoporous SNPs that could extend their potential applications and increase the economic benefits of utilizing rice husk.

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