Synthesis and Characterization of Bimodal Mesoporous Silica Derived from Rice Husk Ash

Watthanachai, Chanyarak; Ngamcharussrivichai, Chawalit; Pengprecha, Somchai

doi:10.4186/ej.2019.23.1.25

Cited by 7 publications

(13 citation statements)

References 24 publications

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“…In general, commercial materials such as tetraethyl orthosilicate (TEOS) [23][24][25] and sodium silicate [26][27] are utilized as silica precursors in the production of SBA-15, which are, of course, relatively expensive. Several natural materials have been used as a source of silica in the synthesis of SBA-15, including sugarcane bagasse [28], brickyard ash [29], coal gangue [30], oil palm ash [31], and rice husk ash [32][33][34], to reduce production costs. Rice husk ash is the most potent natural material because it contains more than 90% of SiO 2 [35][36][37].…”

Section: ■ Introductionmentioning

confidence: 99%

“…SBA-15 is typically synthesized using the hydrothermal technique [23][24][25][26][27][28][29][30][31][32][33][34], which involves heating the reactants with air in a closed container (autoclave). The hydrothermal approach is less cost-effective and does not adhere to the green chemistry principle since it takes a long time and a lot of energy to complete the reaction.…”

Section: ■ Introductionmentioning

confidence: 99%

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Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Suyanta

Mudasir²

2022

Indones. J. Chem.

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By optimizing rice husk silica mass and sonication time, SBA-15 was successfully synthesized in a more efficient and environmentally friendly way. The solution of Pluronic P-123 was mixed with the solution containing NaOH and various masses of rice husk silica (4–12 g), followed by sonication for a certain time (30–150 min). The mixture was filtered and washed with distilled water and ethanol until neutral, then dried at 110 °C for 2 h and calcined at 500 °C for 6 h. The results showed that the optimal mass of rice husk silica was 8 g, while the optimal sonication time was 30 min. The product has a cylindrical pore shape with good crystallinity and pore structure regularity. The specific surface area (SBET), the pore diameter (DBJH), the specific pore volume (VBJH), and the wall thickness (WT) of the product were 601 m2 g–1, 4.76 nm, 0.88 mL g–1, and 5.02 nm, respectively. These results are not considerably different from the porosity of SBA-15, synthesized previously using conventional hydrothermal techniques from various silica sources. In addition, it is also comparable to the porosity of SBA-15 produced from TEOS by sonochemical methods as well as with commercial SBA-15.

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Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Suyanta

Mudasir²

2022

Indones. J. Chem.

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“…Previous research has revealed that mesopore silica can function as a catalyst [2], drug delivery [3,4], and adsorbent [5]. This is because mesoporous silica has a large specific surface area with regular pores.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mesoporous Silica From Beach Sand Using Variation of Cetyl Trimethyl Ammonium Bromide (CTAB)

Efiyanti¹,

Trisunaryanti²,

Bahri³

et al. 2021

Proceedings of the 3rd KOBI Congress, International and National Conferences (KOBICINC 2020)

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The potential for sand in Indonesia is very abundant because Indonesia has a long coastline than other countries. This research was conducted to explore the potential of beach sand as an alternative raw material to replace commercial silica. To obtain the natural silica, the beach sand was prepared and extracted into mesoporous silica. The reflux method was chosen to extract silica using NaOH solution, HCl solution, and CTAB surfactant. The mesoporous structure was potentially affected by CTAB and SiO2 ratio, and therefore, this research was focused more on the effect of CTAB weight variation (3; 4,5 and 6 g). Several instruments were used to analyze the characteristics of silica, such as Surface Area Analyzer (SAA), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR). The mesoporous silica has siloxane (Si-O-Si) and silanol (Si-OH) functional group and showed a coral reef-like structure. The porosity properties of these materials ranging from 300-385 m2/g for the specific surface area, 5-8.8 nanometer for pore diameter, and 0.4-0.8 cm3/g for pore volume. Optimal CTAB weight found to be at 6 g, which produces the mesoporous silica with a surface area of 385.928 m2/g, an average pore diameter of 6.015 nanometers, and pore volume of 0.579 cm3/g.

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“…This process will cause each hole to collide with each other, which affect to create a window within the material. Eventually, the gel is continually dried at 100 ºC to make the structure more organized, and followed by template removal process with calcination under air atmosphere or solvent extraction using ethanol in order to dispose the contaminant such as unreacted substrate [43,44] as figure 2.2. -C) Mesoporous carbon has been fascinated significant attendance because of their use as catalyst support for many reactions, which is a large pore volume, surface area, and pore size [45].…”

Section: Properties Of Mesoporous Silicamentioning

confidence: 99%

“…In addition, Barrett-Joyner-Halenda (BJH) method based on the Kelvin equation was also applied to determine the pore structure of samples [44].…”

Section: Characterization Of Mesocellular Foam Materials Nitrogen-phy...mentioning

confidence: 99%

Synthesis, characteristic and application of mesocellular foam carbon (MCF-C) as catalyst for dehydrogenation of ethanol

Klinthongchai¹

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This research aims to investigate the synthesis of MCF-C as catalyst for dehydrogenation of ethanol. The study was classified into 3 parts. In the first part, the mesocellular foam silica (MCF-Si) was converted to mesocellular foam carbon using a surfactant residue as a carbon source, and followed by testing the dehydrogenation of ethanol to acetaldehyde. Surfactant residue in the inside of MCF-Si could be used as the carbon source for MCF-C synthesis. The obtained material could maintain the meso-structure, and exhibited higher activity for ethanol dehydrogenation in comparison to MCF-Si. For the second part, MCF-C was examined for 12 h for catalyst deactivation at various temperature. The low operating temperature at 300 °C exhibited the highest ethanol conversion changed, which was accorded to the higher coke formation to obstruct the catalysis process. Thus, the operating temperature of ethanol dehydrogenation using MCF-C as catalyst was significantly affected to the coke formation. The final part was examined for the effect of pore size of MCF-C to optimize the selectivity and yield of acetaldehyde. MCF-C was synthesized with the various ratios of TMB/P123 and tested in ethanol dehydrogenation reaction. The higher ratio of TMB/P123 significantly changed the physical properties as pore size and provided higher catalytic activity.

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Synthesis and Characterization of Bimodal Mesoporous Silica Derived from Rice Husk Ash

Cited by 7 publications

References 24 publications

Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Synthesis of Mesoporous Silica From Beach Sand Using Variation of Cetyl Trimethyl Ammonium Bromide (CTAB)

Synthesis, characteristic and application of mesocellular foam carbon (MCF-C) as catalyst for dehydrogenation of ethanol

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