Effect of the preparation conditions on the catalytic activity of calcined Ca/Al-layered double hydroxides for the synthesis of glycerol carbonate

Granados-Reyes, Judith; Salagre, Pilar; Cesteros, Yolanda

doi:10.1016/j.apcata.2017.02.013

Cited by 51 publications

(22 citation statements)

References 34 publications

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“…Ca/Al LDH was detected as layer material as mayenite which has composition Ca12Al14O33. Other phases were detected as Katoite at 17.3° (211), 20.11° (220), 28.5° (321), 31.9° (400), 36.58° (420), 39.3° (431), 44.6° (521), 52.8° (611), 55.0° (640), and 57.74°(642) [32]. The interlayer distance of Ca/Al LDH was 4.25 Å.…”

Section: Resultsmentioning

confidence: 99%

“…Synthesis of Ca/AL LDH was conducted at pH 11 using co-precipitation method. The procedure was adopted from Granados-Reyes with modification [32]. Calcium nitrate and aluminum nitrate with molar ratio 2:1 (Ca 2+ /Al 3+ ) was prepared by adding sodium hydroxide 2 M. The mixtures were stirred at 60 o C and pH was adjusted to 11 by slow addition of sodium hydroxide.…”

Section: Synthesis Of Ca/al Ldhmentioning

confidence: 99%

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Removal of Iron(II) Using Intercalated Ca/Al Layered Double Hydroxides with [α-SiW12O40]4-

Taher

Christina

Said

et al. 2018

Bull. Chem. React. Eng. Catal.

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Ca/Al layered double hydroxide (LDH) was successfully synthesized by co-precipitation method at pH 11 under room temperature condition then followed by calcination at 800 o C. The synthesized Ca/Al LDH was further intercalated with Keggin ion [α-SiW12O40] 4-in order to prepare the intercalated form of Ca/Al LDH. The synthesized materials were characterized by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) and used as an adsorbent for iron(II) removal from the aqueous medium. The adsorption performance was investigated by studying the kinetics and thermodynamic properties of the adsorption process. The results showed that pristine Ca/Al LDH exhibited diffraction peak at 2θ about 20 o which corresponds to the layer structure of the LDH material. For the intercalated Ca/Al LDH, the diffraction observed at 2θ around 30-40 o indicated that the [α-SiW12O40] 4-was successfully intercalated into the interlayer space of Ca/Al LDH. Furthermore, the intercalated Ca/Al LDH showed higher adsorption capacity toward iron(II) than the pristine form of Ca/Al LDH.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Ca/al Ldhmentioning

confidence: 99%

Removal of Iron(II) Using Intercalated Ca/Al Layered Double Hydroxides with [α-SiW12O40]4-

Taher

Christina

Said

et al. 2018

Bull. Chem. React. Eng. Catal.

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“…Synthesis Ca/Al layered double hydroxides was conducted according to Granados-Reyes et al (2017) by the co-precipitation method with slight modification [21]. Calcium nitrate and aluminum nitrate with molar ratio 2:1 (Ca 2+ /Al 3+ ) were prepared by adding sodium hydroxide 2 M. The mixtures were stirred at 60 °C and pH was adjusted to 11 by adding sodium hydroxide.…”

Section: Synthesis Of Ca/al Ldhmentioning

confidence: 99%

Adsorption of Cadmium(II) Using Ca/Al Layered Double Hydroxides Intercalated with Keggin Ion

et al. 2019

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Ca/Al layered double hydroxides (Ca/Al LDH) was synthesized using co-precipitation method following calcination at 800 °C and was intercalated with Keggin ion [α-SiW12O40]4– to form intercalated Ca/Al LDH. Materials were characterized using XRD and FTIR spectrophotometer. Furthermore, materials were used as an adsorbent of cadmium(II) from solution. The results showed that layer material was formed completely after calcination which was indicated at diffraction 20° due to loss of water in the interlayer space. Ca/Al LDH after calcination was intercalated with [α-SiW12O40]4– ion and interlayer distance was increased from 4.25 to 4.41 Å showed that intercalation process was successfully conducted. Adsorption of cadmium(II) using Ca/Al LDH was conducted at pH 9 and intercalated Ca/Al LDH at pH 8 showed that intercalated material has slightly faster than Ca/Al LDH without intercalation probably due to slightly increasing interlayer distance of Ca/Al LDH after intercalation. The adsorption capacity of intercalated Ca/Al LDH was higher than Ca/Al LDH without intercalation at the temperature range of 30–50 °C.

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“…Thus, heterogeneous catalysts, including alkali metal oxides, hydrotalcites, ionic liquids, alkali metal salts, and lipase, were developed as the alternative of homogeneous catalysts [11,12]. In recent years, waste-derived materials have attracted more and more attention because of the negligible cost of feedstock [13] Some industrial waste, agricultural waste, and municipal waste have been used as the feedstock to prepare catalyst, which showed similar catalytic performance as the catalysts prepared from the pure chemicals [14,15].…”

Section: Introductionmentioning

confidence: 99%

Using Diaper Waste to Prepare Magnetic Catalyst for the Synthesis of Glycerol Carbonate

Wang

Liang²,

Wang

et al. 2020

International Journal of Polymer Science

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Diaper waste was calcined above 400°C after impregnated in the solution of nickel nitrate. The as-prepared diaper waste-derived materials were used as magnetic catalysts for the synthesis of glycerol carbonate (GC). Structure and catalytic ability investigations on the catalysts calcined at different temperatures indicated that calcination temperature was an important factor affecting the property of catalysts. It was found that the catalyst obtained at the calcination temperature of 700°C (named DW-Ni-700) showed the best performance. When DW-Ni-700 was used in the synthesis of GC, GC yield reached 93.2%, and the magnetic property of DW-Ni-700 facilitated the catalyst separation process. Meanwhile, DW-Ni-700 showed high reusability in the reaction. After four times reuse of DW-Ni-700, GC yield decreased less than 4%.

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Effect of the preparation conditions on the catalytic activity of calcined Ca/Al-layered double hydroxides for the synthesis of glycerol carbonate

Cited by 51 publications

References 34 publications

Removal of Iron(II) Using Intercalated Ca/Al Layered Double Hydroxides with [α-SiW12O40]4-

Removal of Iron(II) Using Intercalated Ca/Al Layered Double Hydroxides with [α-SiW12O40]4-

Adsorption of Cadmium(II) Using Ca/Al Layered Double Hydroxides Intercalated with Keggin Ion

Using Diaper Waste to Prepare Magnetic Catalyst for the Synthesis of Glycerol Carbonate

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