FTIR and TGA Analysis in Relation with the % Crystallinity of the SiO&lt;sub&gt;2&lt;/sub&gt; Obtained by Burning Rice Husk at Various Temperatures

Deshmukh, Pallavi; Peshwe, D. R.; Pathak, S. U.

doi:10.4028/www.scientific.net/amr.585.77

Cited by 20 publications

(11 citation statements)

References 14 publications

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“…Regarding the calcined samples, a characteristic peak at 1620 cm –1 derived from the conjugation bond CN are observed in the bare carbon, Si/C, and Si/Ag/C samples. Particularly, the characteristic peaks at around 1100, 800, and 480 cm –1 in the Si/C and Si/Ag/C samples can be assigned to SiO 2 due to partial surface oxidation of the Si nanoparticles . The FTIR results indicate that nitrogen-doped carbon is obtained after carbonization due to the presence of the DETA curing agent.…”

Section: Resultsmentioning

confidence: 90%

“…Particularly, the characteristic peaks at around 1100 cm -1 , 800 cm -1 and 480 cm -1 in the Si/C and Si/Ag/C samples can be assigned to SiO 2 due to partial surface oxidation of the Si nanoparticles. 60 The FTIR results indicate that nitrogen-doped carbon is obtained after carbonization due to the presence of the DETA curing agent. By comparing the FTIR profiles of the samples before and after calcination, it is found that the number of the peaks within the long wavelength range is significantly reduced after calcination.…”

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact

Yin

Zhao

et al. 2018

ACS Nano

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Silicon (Si) has been regarded as one of the most promising anodes for next-generation lithium-ion batteries (LIBs) due to its exceptional capacity, appropriate voltage profile, and reliable operation safety. However, poor cyclic stability and moderate rate performance have been critical drawbacks to hamper the practical application of Si-based anodes. It has been one of the central issues to develop new strategies to improve the cyclic and rate performance of the Si-based lithium-ion battery anodes. In this work, super-small metal nanoparticles (2.9 nm in diameter) are in situ synthesized and homogeneously embedded in the in situ formed nitrogen-doped carbon matrix, as demonstrated by the Si/Ag/C nanohybrid, where epoxy resin monomers are used as solvent and carbon source. With tiny amount of silver (2.59% by mass), the Si/Ag/C nanohybrid exhibits superior rate performance compared to the bare Si/C sample. Systematic structure characterization and electrochemical performance tests of the Si/Ag/C nanohybrids have been performed. The mechanism for the enhanced rate performance is investigated and elaborated. The temperature-dependent I-V behavior of the Si/Ag/C nanohybrids with tuned silver contents is measured. Based on the model, it is found that the super-small silver nanoparticles mainly increase charge carrier mobility instead of the charge carrier density in the Si/Ag/C nanohybrids. The evaluation of the total electron transportation length provided by the silver nanoparticles within the electrode also suggests significantly enhanced charge carrier mobility. The existence of tremendous amounts of super-small silver nanoparticles with excellent mechanical properties also contributes to the slightly improved cyclic stability compared to that of simple Si/C anodes.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 97%

Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact

Yin

Zhao

et al. 2018

ACS Nano

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“…The BRHA and WRHA have similar FTIR spectrum. The strong sharp peaks at 1080 and 1083 cm −1 are attributed to Si–O–Si asymmetric stretching, along with peaks at 796 and 800 cm −1 , which are due to symmetric Si–O–Si stretching and Si–O quartz [ 27 , 28 ]. The main broad peak between 1000 and 1200 cm −1 of WRHA indicates characteristics of amorphous silica [ 21 ].…”

Section: Resultsmentioning

confidence: 99%

“…The observation of cristobalite and quartz alpha in BRHA indicates that BRHA should be treated at temperatures greater than 900 °C during the combustion process [22]. On the other hand, the XRD pattern of WRHA exhibited a very small peak of quartz alpha and broadening of the cristobalite peak (at 2θ = 22.5°), which indicates the nature of amorphous silica [27]. The degrees of The XRD analysis was conducted on BRHA and WRHA particles, as shown in Figure 2a,b.…”

Section: Characterization Of Brha and Wrha Particlesmentioning

confidence: 97%

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Sintharm

Phisalaphong

2021

Polymers

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Green natural rubber (NR) composites reinforced with black rice husk ash (BRHA)/white rice husk ash (WRHA), using alginate as a thickening and dispersing agent and crosslinking by CaCl2, was developed to improve mechanical, chemical and dielectric properties of NR-based films by using a latex aqueous microdispersion process. A maximum of 100 per hundred rubbers (phr) of rice husk ashes (RHAs) could be integrated in NR matrix without phase separation. Mechanical properties of the composite films were considerably enhanced, compared to the neat NR film. The composite films reinforced with WRHA demonstrated relatively better mechanical properties than those reinforced with BRHA, whereas the composites filled with BRHA demonstrated higher elongation at break. The crosslinking by CaCl2 improved the film tensile strength but lowered the film elasticity. The reinforcement strongly improved chemical resistance of the composite films in toluene. The films are biodegradable in soil, with weight loss of 7.6–18.3% of the initial dry weight after 3 months. Dielectric constant and dielectric loss factors of the composite films were enhanced with RHAs loading. According to the obtained properties, the composites offer potential for further development as stretchable conductive substrate or semiconducting polymer films for electronic applications.

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“…e FTIR curve of rice husk (Figure 3(a)) shows the predominant band of the siloxane group Si-O-Si at about 1100 cm −1 . is curve also shows the broadband between 2800 cm −1 and 3700 cm −1 , which can be attributed to the OH groups and adsorbed water [18]. As seen from Figures 3(b)-3(d), these bands are also present in these samples, however, with different intensities.…”

Section: Ftir Surface Characteristics Of Alum Rice Husk Cypress and Eucalyptusmentioning

confidence: 72%

Comparing the Coagulation Performance of Rice Husk, Cypress Leaves, and Eucalyptus Leaves Powders with That of Alum in Improving the Turbidity and pH of Some Local Water Sources in Bamenda, Cameroon

Tsamo

Zama

Yerima

et al. 2021

International Journal of Chemical Engineering

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In this study, the efficiencies of the use of rice husk, cypress, and Eucalyptus leaves biocoagulants as alternative to alum as chemical coagulant in reducing turbidity and stabilizing the pH of slaughterhouse wastewater and three other local drinking water sources were investigated. Two systems were used: one involving individual coagulants and the second involving mix alum and biocoagulant with fixed alum dose of 0.05 g and varying amounts of each biocoagulant type (0.05 to 5 g). Turbidity reduction, coagulation activity, and pH variation were used to characterize each system. Results show reduction in turbidity is higher in mixed coagulants than with individual coagulants. At 5 g each of alum, rice husk, cypress, and Eucalyptus leaves, the corresponding turbidity values, 8.3, 13.6, 14.5, and 20.3 NTU, were obtained compared to 7.3 with 0.05 alum and 5 g rice husk mixture, 8.7 NTU with 0.05 g alum and 5 g cypress leaves mixture, and 16.1 NTU with 0.05 g alum and 5 g Eucalyptus leaves mixture, for 37.3 NTU initial turbidity. The used biocoagulants individually show insignificant effect on the pH of coagulation-treated water. Alum has an insignificant effect up to 2 g. 0.05 g of each biocoagulant stabilizes the pH between 6.57 and 7.34 against 4.14 for alum. 0.05 g alum/0.05 g biocoagulant stabilized the pH of water between 6.32 and 7.41. The coagulation activities for individual systems follow the order alum > rice husk > cypress > Eucalyptus, and for mixed systems, alum/rice husk > alum/cypress > alum/Eucalyptus. Water with turbidity and pH values within the World Health Organization’s guideline value of < 5 NTU and 6.5–8.5, respectively, were obtained using studied low cost and locally available biocoagulants.

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FTIR and TGA Analysis in Relation with the % Crystallinity of the SiO<sub>2</sub> Obtained by Burning Rice Husk at Various Temperatures

Cited by 20 publications

References 14 publications

Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact

Si/Ag/C Nanohybrids with in Situ Incorporation of Super-Small Silver Nanoparticles: Tiny Amount, Huge Impact

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Comparing the Coagulation Performance of Rice Husk, Cypress Leaves, and Eucalyptus Leaves Powders with That of Alum in Improving the Turbidity and pH of Some Local Water Sources in Bamenda, Cameroon

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