Preparation of low surface area SiO2 microsphere from wheat husk ash with a facile precipitation process

Cui, Jinlong; Sun, Hongliang; Luo, Zelin; Sun, Juncai; Wen, Zhongsheng

doi:10.1016/j.matlet.2015.04.134

Cited by 31 publications

(17 citation statements)

References 13 publications

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“…Several methods can be employed for the manufacture of SiO 2 , including precipitation [8][9][10], and sol-gel [11][12][13]. The sol-gel method is widely used because the process takes place at low temperature, the simple and the resulting product has a high purity and nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode

Wardiyati

Adi

Deswita

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode

Wardiyati

Adi

Deswita

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Figure B illustrates the FTIR spectrum of as‐prepared nanopowder. It indicates the presence of characteristic bond of the silicate system at around 1064 cm −1 , ie, the asymmetric stretching vibration of siloxane (Si–O–Si) bonds . The peaks at around 790 and 445 cm −1 are ascribed to the symmetric stretching and bending vibrations of the Si–O bonds, respectively .…”

Section: Resultsmentioning

confidence: 99%

A facile route for the preparation of silica foams using rice husk ash

Hossain

Mathur

Bhardwaj

et al. 2019

Int J Applied Ceramic Tech

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This work aims to synthesize silica foam with around 75 vol. % open porosity without using any additive or pore forming agents, in order to prevent the generation of greenhouse gases during pore formation in the silica matrix. Waste rice husk ash (RHA) derived silica is used as a silica source, which is extracted through the alkali extraction synthesis route. Several physical characterizations such as X‐ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), differential thermal‐thermogravimetric (DTA‐TGA) and FTIR analysis have been done for RHA extracted silica. Silica foam specimens are fabricated through control compaction pressure and at low foaming temperature. Samples which are fired at 550°C for 30 minutes exhibit both a adequate apparent porosity (AP; ~75.82%) and significant compressive strength (~1.54 MPa). It can also be observed that the porosity and strength values are changed with the variation in compaction pressure and foaming temperature.

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“…The increment of adsorption at p/p 0 = 1.0 was caused by larger mesopores that may be accompanied with slit-shaped pores [43]. The increase in the SSA values was observed for all samples, but only Pd-NPs PEG had substantially low ones ( Table 2).…”

Section: Structure and Morphology Of Pd/sio2mentioning

confidence: 89%

“…As shown in Figure 4a, the nitrogen adsorption-desorption isotherms of the SiO2 and Pd/SiO2 particles are of type IV based on the IUPAC classification, with H3 hysteresis loop at p/p0 > 0.8. The increment of adsorption at p/p0 = 1.0 was caused by larger mesopores that may be accompanied with slit-shaped pores [43]. The increase in the SSA values was observed for all samples, but only Pd-NPsPEG had substantially low ones (Table 2).…”

Section: Structure and Morphology Of Pd/sio2mentioning

confidence: 90%

Chemical Synthesis and Characterization of Pd/SiO2: The Effect of Chemical Reagent

Bugaev

Polyakov

Tereshchenko

et al. 2018

Metals

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The size and shape distribution of metal nanoparticles (NPs) are important parameters that need to be tuned in order to achieve desired properties of materials for practical applications. In the current work, we present the synthesis of palladium NPs supported on silica by three different methods, applying reduction by sodium borohydride, hydrazine vapors, and polyethylene glycol (PEG). The synthesized materials were characterized by X-ray diffraction, X-ray fluorescence, transmission electron microscopy, surface area and porosity measurements, and thermogravimetric analysis. Similar nanoparticle sizes with narrow size distribution centered at 8 nm were obtained after reduction by sodium borohydride and hydrazine vapors, whereas the smallest particle size of about 4.8 nm was obtained after reduction by PEG. The effect of modification of the initial palladium chloride compound by ammonium hydroxide was found to lead to the formation of larger particles with average size of 15 nm and broader size distribution. In addition, the process of the reduction of palladium by PEG at different reduction stages was monitored by UV-Vis spectroscopy. CO-stripping voltammetry showed that reduction in hydrazine and in PEG allowed the preparation of Pd NPs with high electrochemically-active surface area. Such NPs are promising materials for electrocatalysis.

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Preparation of low surface area SiO2 microsphere from wheat husk ash with a facile precipitation process

Cited by 31 publications

References 13 publications

Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode

Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode

A facile route for the preparation of silica foams using rice husk ash

Chemical Synthesis and Characterization of Pd/SiO2: The Effect of Chemical Reagent

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Preparation of low surface area SiO2 microsphere from wheat husk ash with a facile precipitation process

Cited by 31 publications

References 13 publications

Synthesis and Characterization of Microwave Absorber SiO2by Sol-Gel Methode

Synthesis and Characterization of Microwave Absorber SiO2by Sol-Gel Methode

A facile route for the preparation of silica foams using rice husk ash

Chemical Synthesis and Characterization of Pd/SiO2: The Effect of Chemical Reagent

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Product

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Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode

Synthesis and Characterization of Microwave Absorber SiO₂by Sol-Gel Methode