Extraction of silica gel from Sorghum bicolour (L.) moench bagasse ash

Mupa, Mathew; Hungwe, C B; Witzleben, Steffen; Mahamadi, Courtie; Muchanyereyi, Netai

doi:10.5897/ajpac2015.0603

Cited by 12 publications

(10 citation statements)

References 10 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They are cost efficient and low maintenance. Materials such as silver [1][2][3][4], gold [5,6], titanium [7] and silica [8][9][10][11][12][13][14][15][16][17] can be extracted from agricultural products. Furthermore, plant-mediated nanoparticles are preferred, as they are cost effective, environmentally friendly and safe for therapeutic use in humans [1,6].…”

Section: Introductionmentioning

confidence: 99%

“…The standard form of crystalline silica found in nature is quartz. Silica has been found to be a versatile material, and is heavily utilized in various fields and for various applications, such as in petroleum refining, ceramics, anticorrosion agents, cosmetics products and as a catalyst in chemical reactions [10,12,18]. The use of commercialized high purity silica is quite costly, and is unsuitable in most industrial applications because of its high melting point [19,20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Physical and Optical Studies of Crystalline Silica Derived from the Green Synthesis of Coconut Husk Ash

et al. 2020

View full text Add to dashboard Cite

The green synthesis of silica has been extensively explored over the last few decades, as silica compounds found in commercial products can cause negative effects on human health. This calls for alternative ways to produce silica that are safer, cheaper and more environmentally friendly. Some of the agricultural wastes proven to contain silica include rice husk, sugarcane bagasse, coconut shells and coconut husk. This paper describes the synthesis of silica from coconut husk waste, and its physical and optical properties for potential utilization in optical applications. Coconut husk was subjected to fire at 500–700 °C so as to form coconut husk ash (CHA), and was then treated with sulfuric acid to extract silica from the ash. Most of the weight degradation subsequently occurred at temperatures from 221 to 360 °C. X-ray fluorescence (XRF) analysis proved that 91.76% of the silica was obtained, while major peaks on the X-ray diffraction (XRD) spectrum were observed after the acid treatment. Chemical bonds such as Si-O-Si, CH2, -OH and Si-OH were found in the spectrum of the Fourier transform infrared spectroscopy (FTIR). Furthermore, the particles displayed rod-like shapes and irregular sizes, but the particle with sizes ranging from 200–750 nm decreased after the acid treatment. The relationship between the absorption coefficient and photon energy was obtained by finding the optical energy gap, which was found to be 4.3 eV. These data points provide critical information when used in optical applications. The overall studies show that synthesized silica has great potential for use in optical field applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Physical and Optical Studies of Crystalline Silica Derived from the Green Synthesis of Coconut Husk Ash

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The sol gel technique mainly used for extracting silica from agricultural material like rice husk [6], sugar cane bagasse [7][8], wheat husk [9], corn cob [10], and wheat staw [11]. The sol-gel process is widely used to produce pure silica particles due to its ability to control the particle size, size distribution and morphology through systematic monitoring of reaction parameters [12].…”

Section: Introductionmentioning

confidence: 99%

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

Silviana

Bayu

2018

MATEC Web Conf.

View full text Add to dashboard Cite

Silicon (Si) is a promising alternative material for the anode Lithium ion Battery (LIB). Si has a large theoretical capacity about 3579 mA hg-1, ten times greater than the commercial graphite anode (372 mA hg-1). Bamboo is a source of organic silica (bio-silica). Most part biogenetic content of SiO2 is obtained in bamboo leaves. This paper aims to investigate the synthesis nano Si from bamboo leaves through magnesiothermic reduction after silica extraction using sol–gel method and to observe nano Si of bamboo leaf as mixed material for lithium ion baterry. Silica and silicon content was determined using XRF. Silica product has 96,3 wt. % yield of extraction from bamboo leaf, while silicon yield was obtained 61.2 wt. %. The XRD pattern revealed that silica and silicon product were amourphous. The extracted silica and silicon from bambo leaf has spherical shape and agglomerated form. As anoda material for LIB, silicon product achieved 0,002 mAh capacity for 22 cycle.

show abstract

“…However, the extraction selectivity observed for the citric acid-treated sample indicates specific interactions between carboxylic acid groups of citric acid with some the metal ions. These interactions are known to occur by chelation [9,[25][26][27][28][29][30].…”

Section: The Influence Of Leaching On the Chemical And Elemental Compmentioning

confidence: 99%

“…Acid leaching disrupts the lignin-carbohydrate matrix in order to enable cellulose hydrolysis [7]. Inorganic acids (e.g., sulfuric and hydrochloric acid) and bases (e.g., sodium hydroxide and ammonium hydroxide) have been used for biomass leaching in previous studies [1,8,9]. Inorganic acid leaching protocols, however, are environmentally unfriendly.…”

Section: Introductionmentioning

confidence: 99%

The Production of Biogenic Silica from Different South African Agricultural Residues through a Thermo-Chemical Treatment Method

Maseko

Schneider²,

Wassersleben

et al. 2021

Sustainability

View full text Add to dashboard Cite

A thermo-chemical treatment method was used to produce biogenic amorphous silica from South African sugarcane and maize residues. Different fractions of South African sugarcane (leaves, pith, and fiber) were processed for silica production. The biomass samples were leached with either 7 wt% citric acid or 7 wt% sulfuric acid at 353 K for 2 h prior to being rinsed, dried and combusted using a four-step program ranging from room temperature to 873 K in a furnace. The characterization of the pre-treated biomass samples was conducted using thermogravimetric analysis (TG/DTA), X-ray fluorescence analysis (XRF) and elemental analysis (CHN), while the final products were characterized by XRF, X-ray diffraction (XRD), elemental analysis, nitrogen physisorption and scanning electron microscopy (SEM). Citric acid pre-treatment proved to be an attractive alternative to mineral acids. Amorphous biogenic silica was produced from sugarcane leaves in good quality (0.1 wt% residual carbon and up to 99.3 wt% silica content). The produced biogenic silica also had great textural properties such as a surface area of up to 323 m2 g−1, average pore diameter of 5.0 nm, and a pore volume of 0.41 cm3 g−1.

show abstract

Extraction of silica gel from Sorghum bicolour (L.) moench bagasse ash

Cited by 12 publications

References 10 publications

The Physical and Optical Studies of Crystalline Silica Derived from the Green Synthesis of Coconut Husk Ash

The Physical and Optical Studies of Crystalline Silica Derived from the Green Synthesis of Coconut Husk Ash

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

The Production of Biogenic Silica from Different South African Agricultural Residues through a Thermo-Chemical Treatment Method

Contact Info

Product

Resources

About