Silica Nanoparticles and Frameworks from Rice Husk Biomass

Wang, Weixing; Martin, Jarett C.; Fan, Xiaotian; Han, Aijie; Luo, Zhiping; Sun, Luyi

doi:10.1021/am201619u

Cited by 199 publications

(120 citation statements)

References 43 publications

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“…In the step of converting RHs to nano-SiO 2 , simply burning RHs in air will produce bulk SiO 2 , and it is necessary to first perform HCl leaching7 and then only heat at moderate temperatures to avoid the fusion of the SiO 2 product (Fig. 2a–c) while removing the organic matter.…”

Section: Resultsmentioning

confidence: 99%

“…Surprisingly, silica obtained in this way is relatively pure and accounts for as much as ~20% of the dry weight of the RHs6. Moreover, the silica within the RHs naturally exists in the form of nanoparticles7. As a living plant, rice absorbs silica in the form of silicic acid from soil, and the silica accumulates around cellulose micro-compartments8910, as illustrated in Supplementary Fig.…”

mentioning

confidence: 97%

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Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes

Liu

Huo

McDowell

et al. 2013

Sci Rep

462

331

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The recovery of useful materials from earth-abundant substances is of strategic importance for industrial processes. Despite the fact that Si is the second most abundant element in the Earth's crust, processes to form Si nanomaterials is usually complex, costly and energy-intensive. Here we show that pure Si nanoparticles (SiNPs) can be derived directly from rice husks (RHs), an abundant agricultural byproduct produced at a rate of 1.2 × 108 tons/year, with a conversion yield as high as 5% by mass. And owing to their small size (10–40 nm) and porous nature, these recovered SiNPs exhibits high performance as Li-ion battery anodes, with high reversible capacity (2,790 mA h g−1, seven times greater than graphite anodes) and long cycle life (86% capacity retention over 300 cycles). Using RHs as the raw material source, overall energy-efficient, green, and large scale synthesis of low-cost and functional Si nanomaterials is possible.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 97%

Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes

Liu

Huo

McDowell

et al. 2013

Sci Rep

462

331

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“…Hydrochloric acid was proven as an effective acid used in pre-treatment before calcination to remove most of the metallic impurities and producing high purity silica. Therefore, many researchers succeeded in obtaining high purity silica from RH, for instance Mishra et al [13], Della et al [14], Swatsitang et al [15], Wang et al [16] and Jung et. al [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of roasting-quenching pretreatment on the rice husk silica prepared by calcination method

Maksum

Rustandi²,

Permana

et al. 2017

AIP Conference Proceedings

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“…Nowadays, there is an increasing demand for eco-friendly disposal and utilization of RHA. Many studies indicated that it was a promising low-cost candidate for preparation of silica nanoparticles [18–20]. Nano-sized silica can be used to form nanofluids with special interest because of its high specific surface area, excellent stability, high mechanical resistance, and possibility of reuse [21, 22].…”

Section: Introductionmentioning

confidence: 99%

“…The commercially available silica nanoparticles are typically prepared by using a silica precursor as silicon source, such as silicon alkoxide (typically silicon tetraethoxysilane). However, the synthesis of silica precursors is usually energy intensive and associated with high cost, eco-hazardous, and unsustainability issues [18]. …”

Section: Introductionmentioning

confidence: 99%

Rice Husk Ash-Derived Silica Nanofluids: Synthesis and Stability Study

Zhang

Zheng

et al. 2016

Nanoscale Res Lett

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Nanofluids, colloidal suspensions consisting of base fluids and nanoparticles, are a new generation of engineering working fluids. Nanofluids have shown great potential in heat/mass transfer applications. However, their practical applications are limited by the high production cost and low stability. In this study, a low-cost agricultural waste, rice husk ash (RHA), was used as a silicon source to the synthesis of silica nanofluids. First, silica nanoparticles with an average size of 47 nm were synthesized. Next, by dispersing the silica nanoparticles in water with ultrasonic vibration, silica nanofluids were formed. The results indicated that the dispersibility and stability of nanofluids were highly dependent on sonication time and power, dispersant types and concentrations, as well as pH; an optimal experiment condition could result in the highest stability of silica nanofluid. After 7 days storage, the nanofluid showed no sedimentation, unchanged particle size, and zeta potential. The results of this study demonstrated that there is a great potential for the use of RHA as a low-cost renewable resource for the production of stable silica nanofluids. Graphical AbstractRice husk ash was used as a low-cost renewable resource for production of silica nanofluids with high stability.

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Silica Nanoparticles and Frameworks from Rice Husk Biomass

Cited by 199 publications

References 43 publications

Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes

Rice husks as a sustainable source of nanostructured silicon for high performance Li-ion battery anodes

Influence of roasting-quenching pretreatment on the rice husk silica prepared by calcination method

Rice Husk Ash-Derived Silica Nanofluids: Synthesis and Stability Study

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