Extraction of Meso-pores Amorphous SiO2 from Van Pumice

Sarıkaya, Musa; Turan, M. Deniz; Aydogmus, Ramazan; Yücel, Ayşegül Atak; Kizilkaya, Nilgun; Depçi̇, Tolga

doi:10.2174/1877946807666170808122455

Cited by 4 publications

(2 citation statements)

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“…[22] Other authors have indicated a band centered around 716 cm − 1 after prolonged milling processes in different synthetic zeolites, which is related to the symmetric stretching of the Si-O bond. [23,24] In addition, recent ndings on the formation of amorphous zeolites report a band at 690 cm − 1 associated with O-T-O symmetric stretching vibrations. [25] Consequently, we could deduce from the results obtained from the amorphization and undersizing in zeolite 4A the appearance of a band located around 690 cm − 1 in the FTIR spectrum.…”

Section: Resultsmentioning

confidence: 98%

Optimization of the selective effect of zeolite in the synthesis of Cu2O Nanoparticles

Valenzuela-Martínez,

Hurtado,

Navarro-Badilla

et al. 2024

Preprint

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In this study, we exhibit a novel method for synthesizing Cu2O nanoparticles by employing ion exchange within the synthetic nanozeolite 4A matrix. The nanoparticles showed a consistent particle size, predominantly around 6 nm, with a narrow distribution. Nanosizing of the zeolite was achieved through high-energy milling treatments, thereby enhancing the surface-to-volume ratio. A band close to 700 cm− 1 was observed in the FTIR spectrum, potentially indicating an aspect of zeolite downsizing related to symmetric stretching of the Si-O bond post-milling. Furthermore, a distinctive band corresponding to Cu(I)-O stretching vibrations was identified around 600 cm− 1. Additionally, optical absorption analyses in the UV-Vis spectrum revealed two characteristic bands attributable to Cu2O nanoparticles, positioned at 370 nm and 470 nm, respectively. These findings lead to advancements in resource use and promote sustainable and environmentally friendly production practices.

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Section: Resultsmentioning

confidence: 98%

Optimization of the selective effect of zeolite in the synthesis of Cu2O Nanoparticles

Valenzuela-Martínez,

Hurtado,

Navarro-Badilla

et al. 2024

Preprint

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“…Figure 4 shows the XRD spectra of both S and SP50 after their thermal treatment at 450 and 600 °C (plots ( a ) and ( b ), respectively). They are all practically amorphous, and only the broad characteristic peak of silica between 15 and 35° is observed [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Thermal Behavior and Structural Study of SiO2/Poly(ε-caprolactone) Hybrids Synthesized via Sol-Gel Method

et al. 2018

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SiO2-based organic-inorganic hybrids (OIHs) are versatile materials whose properties may change significantly because of their thermal treatment. In fact, after their preparation at low temperature by the sol-gel method, they still have reactive silanol groups due to incomplete condensation reactions that can be removed by accelerating these processes upon heating them in controlled experimental conditions. In this study, the thermal behavior of pure SiO2 and four SiO2-based OIHs containing increasing amount (6, 12, 24 and 50 wt %) of poly(ε-caprolactone) (PCL) has been studied by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC). The FTIR analysis of the gas mixture evolved at defined temperatures from the samples submitted to the TG experiments identified the mechanisms of thermally activated processes occurring upon heating. In particular, all samples already release ethanol at low temperature. Moreover, thermal degradation of PCL takes place in the richest-PCL sample, leading to 5-hexenoic acid, H2O, CO2, CO and ε-caprolactone. After the samples’ treatment at 450, 600 and 1000 °C, the X-ray diffraction (XRD) spectra revealed that they were still amorphous, while the presence of cristobalite is found in the richest-PCL material.

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Preparation of basic magnesium carbonate nanosheets modified pumice and its adsorption of heavy metals

Zhang,

Xiao,

et al. 2023

Environ Sci Pollut Res

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Extraction of Meso-pores Amorphous SiO2 from Van Pumice

Cited by 4 publications

References 0 publications

Optimization of the selective effect of zeolite in the synthesis of Cu2O Nanoparticles

Optimization of the selective effect of zeolite in the synthesis of Cu2O Nanoparticles

Thermal Behavior and Structural Study of SiO2/Poly(ε-caprolactone) Hybrids Synthesized via Sol-Gel Method

Preparation of basic magnesium carbonate nanosheets modified pumice and its adsorption of heavy metals

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