A facile in situ pillaring method—the synthesis of Al-pillared montmorillonite

Gao, Yan; Li, Wenjie; Sun, Hongchen; Zheng, Zaihang; Cui, Xuejun; Wang, Hongyan; Meng, Fanyu

doi:10.1016/j.clay.2013.12.004

Cited by 21 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it should be noted that BV-P and C2-P materials exhibited very similar reduction profiles ( Supplementary Material, Figure S3 ), in which only one instead of two thermal events of reduction was observed at approximately 500 °C corresponding to the aforementioned external oxides. According to bibliographic reports [ 20 ], it could be ascribed to FeOOH deposited on the external surface of the clay mineral. This is evidence of the effective pillaring of the C2 aluminosilicate, since the BV-P material, widely reported before, could be used as a reference [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…Al/Fe pillared clays have exhibited high performance activating the catalytic wet peroxidation in heterogeneous phase, and have therefore been used in the degradation of several organic compounds present in water, including emerging pollutants [ 6 , 14 ], phenolic compounds [ 8 , 15 , 16 , 17 ], natural organic matter [ 12 , 18 ] and as various toxic and bio-refractory azo-dyes [ 13 , 19 , 20 ], including methyl orange. The catalytic performance of Al/Fe-PILCs in the CWPO reaction is also closely related to the structural characteristics of the starting clay [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Al/Fe-Pillared Clays: Effect of the Starting Mineral

et al. 2017

View full text Add to dashboard Cite

Four natural clays were modified with mixed polyoxocations of Al/Fe for evaluating the effect of the physicochemical properties of the starting materials (chemical composition, abundance of expandable clay phases, cationic exchange capacity and textural properties) on final physicochemical and catalytic properties of Al/Fe-PILCs. The aluminosilicate denoted C2 exhibited the highest potential as starting material in the preparation of Al/Fe-PILC catalysts, mainly due to its starting cationic exchange capacity (192 meq/100 g) and the dioctahedral nature of the smectite phase. These characteristics favored the intercalation of the mixed (Al13−x/Fex)7+ Keggin-type polyoxocations, stabilizing a basal spacing of 17.4 Å and high increase of the BET surface (194 m2/g), mainly represented in microporous content. According to H2-TPR analyses, catalytic performance of the incorporated Fe in the Catalytic Wet Peroxide Oxidation (CWPO) reaction strongly depends on the level of location in mixed Al/Fe pillars. Altogether, such physicochemical characteristics promoted high performance in CWPO catalytic degradation of methyl orange in aqueous medium at very mild reaction temperatures (25.0 ± 1.0 °C) and pressure (76 kPa), achieving TOC removal of 52% and 70% of azo-dye decolourization in only 75 min of reaction under very low concentration of clay catalyst (0.05 g/L).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Al/Fe-Pillared Clays: Effect of the Starting Mineral

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The larger specific surface area material and more pore volume, then more places to do the catalysis reaction [19] . It influenced of polication dimensions of Sn and Cr metal bond to the bentonite interlayer, so that enlarged the basal spacing as confirmed by XRD measurements [20] . In the bentonite interlayer, there are ions that can intercalated, which is the position of the ions are spread, when already pillarization process with Sn and Cr, ions in bentonite interlayer will be replaced with metal Sn and Cr-oxide become shipshape position or elongated, so that the aluminasilicate coating on bentonite will also be lifted wider.…”

Section: Resultsmentioning

confidence: 69%

Development Tin-Chromium Pillared in Bentonite as Catalyst for Ethanol to Gasoline Conversion

Widjaya

Juwono²,

Rinaldi³

2019

AJAS

View full text Add to dashboard Cite

Bentonite is a natural material that can used as a buffer catalysts and easy to modified. Tin and Chromium metals can used as catalyst material. Tin and Chromium metals supported into bentonite was successfully prepared by pillarization method, and was calling Bi-Oxides pillared clays. It has used to catalyst for ethanol to gasoline conversion. Basal spacing for bentonite and Sn-Cr/bentonite were 12,83Çº and 25,67Çº respectively. Specific surface area and pore volume of Sn-Cr/bentonite was investigated and appeared be bigger than bentonite. The results confirmed by BET analysis that were 30,35 m2/g become 168,86 m2/g and pore volume from 0,0065cm3/g become 0,03 cm3/g. The thermal stability was determined by Thermogravimetry Analysis from temperature 0ÂºC until 1000ÂºC and the functional group changes detected by Fourier Transform Infra Red. XRF and EDX detected the Sn-Cr metals in the bentonite. The results of the liquid catalyst test analyzed by GC-MS and showed the contents consisted of benzene, toluene, octane, and naphthalene, that were similar with commercial gasoline. So, the Sn and Cr were using as metal pillars for bentonite interlayer and successfully used this Bi-oxides pillared clays for ethanol to gasoline conversion.Â Keywordsâ€” Bi-Oxides, Pillared clays, Sn-Cr/Bentonite, Ethanol to Gasoline.

show abstract

“…As shown in Fig. b, the 2 θ peak at 11.21° for LDH is ascribed to the first order basal diffraction (003), which corresponds to an interlayer distance of 0.788 nm based on Bragg's equation . As for OLDH, the 2θ peak (003) shifts to 5.52°.…”

Section: Resultsmentioning

confidence: 88%

Synergistic effect of organically modified zinc aluminum layered double hydroxide in intumescent flame‐retarding polypropylene composites containing melamine phytate and dipentaerythritol

Zheng

Liu

Dai

et al. 2019

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

In this article, an organically modified zinc aluminum layered double hydroxide (OLDH) was prepared by a facile and effective method. The aim for preparing and decorating LDH is to improve the dispersion of OLDH particles in polypropylene (PP). Fourier transform infrared (FTIR) spectra and X‐ray diffraction (XRD) spectra have verified the feasibility for preparing OLDH. In contrast with LDH, the hydrophobicity of OLDH was obviously changed after introduction of sodium dodecyl benzene sulfonate. Together with melamine phytate/dipentaerythritol (MPA/DPER), OLDH was introduced into PP by melt blending. Surprisingly, the synergistic effect of OLDH and MPA/DPER was obviously found in flame‐retarding PP. When the content of MPA/DPER and OLDH are 27 phr and 3 phr, the limiting oxygen index value of PP composites is 30.5% and samples can pass UL‐94 V‐0 rating. Thermogravimetric analysis demonstrates that the participation of OLDH can further enhance the thermal stability of PP/MPA/DPER. Moreover, the surface morphology and chemical structure of PP composites after combustion were systematically analyzed by optical photos, SEM, FTIR spectra, and X‐ray photoelectron spectroscopy spectra, respectively. The results reveal that the reinforcing effect of OLDH for char layers structure becomes the main reason for improving the flame retardancy of PP composites. Based on abovementioned analysis, a potential synergistic flame retardant mechanism was primarily proposed. POLYM. ENG. SCI., 59:2301–2312, 2019. © 2019 Society of Plastics Engineers

show abstract

A facile in situ pillaring method—the synthesis of Al-pillared montmorillonite

Cited by 21 publications

References 23 publications

Preparation of Al/Fe-Pillared Clays: Effect of the Starting Mineral

Preparation of Al/Fe-Pillared Clays: Effect of the Starting Mineral

Development Tin-Chromium Pillared in Bentonite as Catalyst for Ethanol to Gasoline Conversion

Synergistic effect of organically modified zinc aluminum layered double hydroxide in intumescent flame‐retarding polypropylene composites containing melamine phytate and dipentaerythritol

Contact Info

Product

Resources

About