Oxidation of aniline over titania pillared montmorillonite clays

Jagtap, Neelam; Ramaswamy, V.

doi:10.1016/j.clay.2006.04.001

Cited by 91 publications

(73 citation statements)

References 38 publications

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“…2b). Note that, TiO 2 pillared clay were reported by many researchers [16][17][18][19], the specific surface areas of the samples were around 250 m 2 /g. However, with the adding of SiO 2 , the surface area of TiO 2 + SiO 2 pillared clay increased to more than 400 m 2 /g, because the composite pillar particles were probably tightly packed in the interlayers forming small pores between the particles and silicate layers.…”

Section: Co 2 Adsorptionmentioning

confidence: 99%

CO2 Adsorption by Several Types of Pillared Montmorillonite Clays

Wang¹,

Yan

Komarneni

2018

Appl Petrochem Res

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CO 2 has been found to be the main anthropogenic contributor to the greenhouse gas effect, thus, the development of carbon capture and storage (CCS) technology is extremely urgent. In this work, two kinds of Al 2 O 3 pillared montmorillonite, one ZrO 2 -pillared montmorillonite and one TiO 2 + SiO 2 pillared montmorillonite were prepared and characterized by X-ray diffraction (XRD) for phase formation and N 2 adsorption-desorption isotherms for surface area and pore-size distribution. Equilibrium adsorption of CO 2 gas was measured at 273 K. CO 2 adsorption capacities of pillared clays increased with the increase of their pore volume. The uptakes of CO 2 by pillared clays were in the range of 0.53-1.18 mmol/g.

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Section: Co 2 Adsorptionmentioning

confidence: 99%

CO2 Adsorption by Several Types of Pillared Montmorillonite Clays

Wang¹,

Yan

Komarneni

2018

Appl Petrochem Res

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“…In this way, several oxidation methods have been reported. Jagtap and Ramaswamy [100] have investigated the effect of synthesis conditions on the properties of Ti-PILCs, prepared by ultrasonic and conventional techniques. The materials were tested as catalysts in aniline oxidation to azoxybenzene at room temperature with aqueous H 2 O 2 as oxidant (see Scheme 11.11).…”

Section: Amine Oxidationmentioning

confidence: 99%

Pillared Clay Catalysts in Green Oxidation Reactions

Vicente

Trujillano

Ciuffi

et al. 2010

Pillared Clays and Related Catalysts

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In this chapter, the use of pillared clays as catalysts in green oxidation reactions is considered. Several catalytic oxidation reactions have been selected, and special attention is given to the reaction products and to the yields achieved.Keywords PILC · Pillared clays · Green oxidation reactions · Catalysts IntroductionPillared InterLayered Clays (PILCs, in short) are prepared by exchanging the charge-compensating cations present in the interlamellar space of the clays with hydroxy-metal polycations. On calcination, the inserted polycations yield rigid, thermally stable oxide species, which prop the clay layers apart and prevent their collapse. The intercalation and pillaring processes produce the development of a porous structure with the presence of particular surface sites. These solids have been used in catalytic, purification, and sorption-based separation applications.The methods and the mathematical models used in the characterization of the porous structure of PILCs have been presented in a recent review [1]. From this study and all the references cited therein, it is clear that a great interest exists in the microporous structure of PILCs as well as in the effect of their structure on the applications of these materials. In summary, several researchers have suggested a bimodal micropore distribution for the microporous structure developed by the intercalated and the pillared clays, but this suggestion is open to questioning and can contribute to the expansion of this field in the coming years.Interest in the application of PILCs as catalysts has undergone a huge increase over the last few years [1,2]. One of the most studied subjects related to PILCs

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“…Пілардовані глинисті мінерали на основі ПГК тита-ну та заліза проявляють достатньо високі каталітичні властивості у реакціях окиснення фенолу [5], аніліну [6], завдяки особливим хімічним властивостям титану.…”

Section: літературний оглядunclassified