Investigation of the Orientation of CTA<sup>+</sup> Ions in the Interlayer of CTAB Pillared Montmorillonite

Karaca, Semra; Gürses, Ahmet; Korucu, Mehtap Ejder

doi:10.1155/2013/274838

Cited by 33 publications

(26 citation statements)

References 51 publications

(64 reference statements)

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“…The basal spacing of this phase was significantly enlarged by pretreatment as a result of this swelling feature. 17,20 Interlayer spacing of MMT was quantitatively assessment using the Debye-Scherrer equation d = (kλ /β cos θ). In this equation d is the thickness of the crystal, k is the Debye-Scherrer constant (0.89), k is the X-ray wavelength (0.15406 nm), b is width of the peak with the maximum intensity in half height, and h is the diffraction angle.…”

Section: Xrd Analysismentioning

confidence: 99%

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Hassani¹,

Kıranşan²,

Soltani³

et al. 2015

Turk J Chem

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Abstract:The main aim of this study was to evaluate the efficacy of montmorillonite clay for the adsorption of C.I. Basic The adsorbent dosage was found to be the key factor that controlled dye adsorption. The adsorption kinetic and isotherm were also investigated. The rate of adsorption showed the best fit with the pseudo-second order model (R 2 = 1). The results of the isotherm study fit the Freundlich model (R 2 > 0.9). The physicochemical properties of the sample were determined by XRF, XRD, FT-IR, and N 2 adsorption-desorption.

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Section: Xrd Analysismentioning

confidence: 99%

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Hassani¹,

Kıranşan²,

Soltani³

et al. 2015

Turk J Chem

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“…Bu sonuç, CTA + iyonlarının MMT yüzeyindeki negatif merkezlere zayıf elektrostatik etkileşimlerle bağlandığını ve yatay çift tabaka şeklinde yönlenmiş CTA + iyonlarının kilin ıslanma karakteristiğini negatif yönde değiştirdiğini göstermektedir (Karaca et al, 2013).…”

Section: Bulgular Ve Tartişmaunclassified

Synthesis and Characterization of Organoclay via Cation Exchange Reaction

Koruyucu¹

2017

jist

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ÖZET: Montmorillonit, [CH 3 (CH 2 ) 15 N(CH 3 ) 3 Br] genel formüllü setil trimetil amonyum bromürle katyon-değişim reaksiyonuna tabi tutulmuştur. Modifiye örnekler X-ray difraksiyon (XRD) tekniği ve Fourier dönüşümlü infrared (FTIR) spektroskopisi ile karakterize edilmiştir. Sonuçlar montmorillonit ve organokil örneklerinin zeta potansiyeli ve temas açısı ölçümleriyle desteklenmiştir. Modifiye edilmemiş montmorillonitin bazal mesafesi XRD ile 1.28 nm olarak belirlenmiştir ve modifikasyondan sonra 1.3 KDK, 2.56 KDK ve 3.85 KDK için bu değer sırasıyla 1.75 nm, 2.03 nm ve 2.56 nm'ye artmıştır. FTIR çalışmaları modifiye edilmiş ve modifiye edilmemiş montmorillonit örnekleri arasındaki yapısal farklılıkları ortaya koymuştur. Zeta potansiyeli ölçümleri kil yüzey yükünün negatiften pozitif değerlere kaydığını göstermiştir. Temas açısı ölçümleri modifikasyondan sonra kilin hidrofilitesinde bir azalma olduğunu göstermiştir.Anahtar kelimeler: Montmorillonit, organokil, CTAB, d-aralığı, temas açıs ABSTRACT: Montmorillonite has been subjected through cation-exchance reaction by cetyltrimethylammonium bromide (CTAB) with general formula [CH 3 (CH 2 ) 15 N(CH 3 ) 3 Br]. The modified samples were charecterized by X-ray diffraction (XRD) technique, Fourier transform infrared (FTIR) spectroscopy. The results are supported by the measurements of zeta potentials and contact angles of montmorillonite and organoclay samples. The basal spacing of unmodified montmorillonite, determined by XRD, was 1.28 nm and after modification it increased up to 1.75 nm, 2.03 nm and 2.56 nm for 1.3 CEC, 2.56 CEC and 3.85 CEC respectively. The FTIR studies revealed structural differences between the modified and unmodified montmorillonite samples. The zeta potential measurements showed that of the clay surface charge shift from negative to positive value. Contact angle measurements have shown a reduction of the clay hydrophility after the modification

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“…Then splitting of the -CH 2 rocking bands is due to the intermolecular interaction between the two adjacent hydrocarbon chains in a perpendicular orthorhombic sub cell (Zhu et al 2005 andKaraca et al 2013) and further requires an all-trans-conformation for its detection (Synder et al.1979). The band in the region of 950-1100 cm -1 corresponding to stretching vibration of Si-O group splits into a sharp band at 1033 cm -1 with a shoulder around 1088 cm attributed to perpendicular Si-O stretching ).…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…With the increase of surfactant, a shoulder band shifted from 916 cm -1 to 918 cm -1 . The significant changes in Si-O stretching band suggest that there is an interaction between the surfactant molecules and siloxane (Si-O) surface (Karaca et al 2013 and. …”

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confidence: 99%

Synthesis and characterization of organoclay modified with cetylpyridinium chloride

Banik

Jahan

Mostofa

et al. 2015

Bangladesh J. Sci. Ind. Res.

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Bentonite has been subjected to modification through ion-exchange reaction by 1-cetylpyridinum chloride. The modified samples were studied by X-ray diffraction (XRD) technique, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The basal spacing of unmodified bentonite, determined by XRD was 14.99 Å and after modification it increased up to 16.97 Å and 16.22 Å at 1CEC and 2CEC. The FT-IR studies revealed structural differences between the modified and unmodified bentonite samples. The IR spectra of the modified bentonite showed the C-C stretching bands (1465 and 1462 cm -1 ) and C-H vibrations (near 2926 and 2852; 2854 cm -1 ). Results of the SEM study revealed a tendency towards lump formation and agglomeration of the organomodified clay particles of bentonite. The possibility of the use of new organoclay to adsorb oils from aqueous solution will be explored. Key words:Organoclay; Adsorption; Surfactant; Cation exchange capacity Available online at www.banglajol.info Bangladesh J. Sci. Ind. Res. 50(1), [65][66][67][68][69][70] 2015 *Corresponding author: E-mail: shanta_samina@yahoo.com Materials and methods MaterialsThe materials used for the synthesis of organoclay are bentonite from local market, 1-cetylpyridinum chloride, hydrochloric acid, acetic acid, sodium bicarbonate, ethanol, sodium chloride, sodium dithionite and hydrogen peroxide (30%) from Merck Germany. The surfactant used in this study is 1-cetylpyridinum chloride (CPC) with a purity of >96%. All the chemicals were used as received without any further purification. Organic solvents for the synthesis and characterization were AR grade and were obtained from Merck Germany. MethodBentonite clay sample was dried, grind and stored in a bottle. Purification of clay was done by the method of Tributh and Lagaly (Tributh and Lagaly, 1986). The cation exchange capacity (CEC) of the clay defined as the total amount of exchangeable cations that the soil can adsorb was estimated by Kjeldahl method (Cuadros and Linares, 1995). The CEC of purified bentonite was 110 meq/100g. Organoclay preparation and characterizationPurification of clay was done respectively by sodium-acetate acetic acid buffer, citrate buffer, sodium dithionite, sodium chloride, hydrochloric acid, sodium chloride and at last distilled water.For synthesis, 5g of purified bentonite was dispersed in 400 mL of water under continuous stirring for 1 h. The amount of surfactant added was calculated with the CEC value (110 meq/100 g clay) of bentonite. Desired amount of 1-cetylpyridinium was added to 200 mL of water in the separate container slowly. The reaction mixture was stirred for 4 hours at 80ºC. The resulting product was separated by filtration and washed with distilled water for 3 times. Then the product was washed with ethanol. Synthesized organoclay was dried in an oven at 80ºC for 48 hours and grind into powder. The concentrations of CPC were 1 CEC and 2 CEC of bentonite, respectively and labeled as OM1 and OM2.In Figure 1, chemical structure ...

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Investigation of the Orientation of CTA⁺ Ions in the Interlayer of CTAB Pillared Montmorillonite

Cited by 33 publications

References 51 publications

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Synthesis and Characterization of Organoclay via Cation Exchange Reaction

Synthesis and characterization of organoclay modified with cetylpyridinium chloride

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Investigation of the Orientation of CTA+ Ions in the Interlayer of CTAB Pillared Montmorillonite

Cited by 33 publications

References 51 publications

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Synthesis and Characterization of Organoclay via Cation Exchange Reaction

Synthesis and characterization of organoclay modified with cetylpyridinium chloride

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Investigation of the Orientation of CTA⁺ Ions in the Interlayer of CTAB Pillared Montmorillonite