A statistical approach to synthesis of functionally modified silica nanoparticles

Beygi, H.; Karimi, Ebrahim Zohourvahid; Farazi, R.; Ebrahimi, Farnaz

doi:10.1016/j.jallcom.2015.09.070

Cited by 16 publications

(8 citation statements)

References 18 publications

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“…As noted in Figure , the peak at 1267 cm −1 was assigned to the absorption band of Si─CH 3 . In addition, the peaks at 1407 and 2962 cm −1 were due to asymmetrical deformation vibrations and stretching vibrations, respectively, of CH bonds . By a simple comparison, we observed that the peaks at 1149, 1267, and 1407 cm −1 were sharper in the PMS2 plot than in the PMS1 plot; this contributed to the higher quantity of silane load in the coating process.…”

Section: Resultsmentioning

confidence: 61%

“…The results reveal presence of functional groups and organic compounds in the electrospun nanofibrous membranes composed of PVDF and 250 μL DMDCS and PVDF and 500 μL DMDCS (PMS1 and PMS2, respectively); these were not present in the pristine PVDF membrane. The existence of organic compounds of silicone nanoparticles on PMS1 and PMS2 were certified by the following peaks: the bands at 802 and 1149 cm −1 were assigned to the symmetrical bending vibrations of Si─O─Si bonds . The peaks at 1022 and 1099 cm −1 might have been due to the wagging mode of the Si─CH 2 ─Si and Si─O─C groups that overlapped each other .…”

Section: Resultsmentioning

confidence: 99%

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Superhydrophobic–superoleophilic electrospun nanofibrous membrane modified by the chemical vapor deposition of dimethyl dichlorosilane for efficient oil–water separation

Pour

Sabzehmeidani

Karimi

et al. 2019

J of Applied Polymer Sci

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Superhydrophobic and superoleophilic functionalized electrospun poly(vinylidene fluoride) (PVDF) membranes with water repellence, breathability, and oil‐sorption and oil–water separation properties were achieved with a combination of an electrospinning technique and the chemical vapor deposition of dichlorodimethyl silane. The samples were laterally characterized by scanning electron microscopy, atomic force microscopy, water contact angle measurement, and Fourier transform infrared spectroscopy. The maximum water contact angle value was 152.0 ± 2.5° for the PVDF nanofibrous membranes with 500 μL of deposited silane (PMS2) obtained under certain conditions. The PMS2 membranes showed 100.0, 93.7, 23.3, 35.0, and 100.0% separation efficiencies for n‐hexane, kerosene, crude oil, frying oil, and toluene, respectively. The understudy membrane exhibited reasonable waterproofness and remarkable breathability (water vapor transition rate = 215.21 g/m2.h). Moreover, the superhydrophobic and superoleophilic nanofibrous membranes also showed good reusability, stability, moderate water‐repellent properties, breathability, antifouling properties, and oil–water separation ability after several cycles. These properties confirmed potential in feasible applications, including protective cloths and in the purification of oil‐polluted water. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47621.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Superhydrophobic–superoleophilic electrospun nanofibrous membrane modified by the chemical vapor deposition of dimethyl dichlorosilane for efficient oil–water separation

Pour

Sabzehmeidani

Karimi

et al. 2019

J of Applied Polymer Sci

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“…In this study, FactSage7.1 software was used to analyze the CLG process for syngas production in theory. 48,49 To find out the most important factors influencing the products, the variance of the target parameter has been calculated. Through the method of Analysis of Variance (ANOVA), the relationship between the reaction parameters and the products can be deeply analyzed.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

“…Therefore, the higher value of the F indicated this model is a greater predictor of the experimental data. 48,49 Based on F, when the value of F i > F 0.05 (3, 3) = 9.28, it is suggested that factor i has a great influence on the gas production. For H 2 generation, only the F value of water vapor was higher than F 0.05 (3,3), which reveals water vapor has a significant effect on H 2 production.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Reaction Mechanism for Syngas Preparation by Lignite Chemical Looping Gasification Using Phosphogypsum Oxygen Carrier

et al. 2018

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In this study, syngas preparation by chemical looping gasification (CLG) process is investigated through theory and experiment. The starting materials for the syngas are low quality lignite, which cannot be used for other applications, and phosphogypsum (PG), the byproduct of wet phosphoric acid. The results show that the CO production is mainly due to the following reaction: (CaSO4 + 4C → CaS + 4CO) and (C + CO2 → 2CO), while the main reactions of H2 generation are (CO2 + H2O(g) + 2CH4 → 3CO + 5H2) and (C + H2O(g) → CO + H2). The analysis results indicate that high temperature and water vapor content are detrimental for phosphogypsum recycling. Furthermore, after three times recycling of phosphogypsum, some sintering is observed. The composition of syngas is very important for the corresponding applications. Therefore, the relationships between reaction factors and products are also investigated. The results of Analysis of Variance (ANOVA) show that H2 and CH4 generation are strongly dependent on water vapor content. The influence of the different factors on CO yield is in the following order: PG/lignite’s molar ratio > temperature > water vapor. Among the three factors, reaction temperature effect on CO2 generation is less than that of the other factors. Moreover, the reaction temperature and the PG/lignite’s molar ratio have a great influence on lignite decomposition. The results of this work can provide some guidance for preparing syngas with the desired composition by the CLG process.

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“…A powerful advantage is the possibility to construct linear regression models to establish empirical relationships for prediction of product responses as a function of synthesis factors. 25 Full and fractional factorial designs have been successfully used previously to screen the synthesis of Stöber silica, [30][31][32] SBA-15, 33 and silica via dissolution precipitation. 34 Whereas factorial designs are regarded as resource-efficient for identification of significant synthesis factors, they often do not contain a sufficiently large number of treatments for response modelling with more precise second-order regression polynomials.…”

Section: Introductionmentioning

confidence: 99%

Designing bioinspired green nanosilicas using statistical and machine learning approaches

Dewulf

Chiacchia

Yeardley

et al. 2021

Mol. Syst. Des. Eng.

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A statistical approach to synthesis of functionally modified silica nanoparticles

Cited by 16 publications

References 18 publications

Superhydrophobic–superoleophilic electrospun nanofibrous membrane modified by the chemical vapor deposition of dimethyl dichlorosilane for efficient oil–water separation

Superhydrophobic–superoleophilic electrospun nanofibrous membrane modified by the chemical vapor deposition of dimethyl dichlorosilane for efficient oil–water separation

Reaction Mechanism for Syngas Preparation by Lignite Chemical Looping Gasification Using Phosphogypsum Oxygen Carrier

Designing bioinspired green nanosilicas using statistical and machine learning approaches

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