Novel sulphated zirconia pillared clay nanoparticles as catalyst in microwave assisted conversion of citronellal

Fatimah, Is; Rubiyanto, Dwiarso; Huda, Thorikul; Zuhrufa, Zulfa; Yudha, Septian P.; Kartika, Nanda Candra

doi:10.1179/1753555715y.0000000045

Cited by 4 publications

(7 citation statements)

References 11 publications

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“…Earlier, Sap and its modified hybrids are often considered to be used as adsorbents (Marcal et al, 2015;Seki et al, 2015;Sato et al, 2016), catalysts and catalyst supports (Carniato et al, 2014;Fatimah et al, 2016). Over the last decades, increasing studies aim at using Sap as functional additives in CPN (Wu et al, 2014;Wang et al, 2015).…”

Section: Applicationsmentioning

confidence: 99%

“…14E). Recently, regarding sulphated zirconia-pillared Sap, Fatimah et al (2016) discovered that the sulphate anions on the surface can increase the number and strength of the Brönsted acid sites of zirconia-pillared Sap.…”

Section: Catalystsmentioning

confidence: 99%

“…Accordingly, the resultant Sap-based materials have been examined for a wide range of applications. Increasing studies show that such materials can be used as adsorbents (Marcal et al, 2015;Sato et al, 2016), catalysts and catalyst supports (Carniato et al, 2014;Fatimah et al, 2016). They can also be used as a functional additive in clay/polymer nanocomposites (CPN) (Wu et al, 2014;Wang et al, 2015) (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Modification, hybridization and applications of saponite: An overview

Zhou

et al. 2019

Applied Clay Science

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Modification of saponite (Sap) by surface engineering and intercalation chemistry introduces guest species into the structure of Sap and enhances the functionalities of the resultant Sap-based hybrids or composites. This review summarizes and evaluates latest scientific advances in the strategies for surface engineering, intercalation and hybridization of Sap, the insights into the relevant mechanisms, and the properties and applications of the resultant Sap-based materials. Studies have indicated that Sap can be inorganically modified by acid activation, inorganic cation exchange, pillaring, and adsorption. The methods of preparing organo-saponite (OSap) hybrids can be categorized as follows: 1) exchanging the inorganic cations in the interlayer space of Sap with organic cations; 2) covalent grafting of organic moieties or groups onto the surface of Sap; 3) intercalating polymer into the interlayer space of Sap by solution intercalation, and melt mixing or in situ polymerization. Organic-inorganic modified Sap can be made through the reactions between organic species and inorganic-modified Sap, or by the combination of inorganic species with organic-modified Sap. Modified Sap exhibits exceptional thermal stability, surface acidity, optical effects and adsorption. As such, the modified Sap can be used for optical materials, adsorbents, catalysts and clay/polymer nanocomposites (CPN). Literature survey suggests that future studies should place emphasis on optimizing and scaling up the modification of Sap, probing the thermodynamics, kinetics and mechanisms of the modification of Sap, endowing Sap with novel functionalities, and accordingly advancing the practical applications of the resultant Sap-based materials.

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Section: Applicationsmentioning

confidence: 99%

Section: Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modification, hybridization and applications of saponite: An overview

Zhou

et al. 2019

Applied Clay Science

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“…Besides the economic value of catalysts, their high surface area, acidity, and stability are important properties to consider [2]. The formation of metal oxide pillared clays in some catalytic applications, including citronellal cyclization, was widely reported [3][4][5]. The preservation of surface Brønsted and Lewis acidities plays an important role in an effective and recyclable catalytic mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Previous works reported on the use of saponite and pillared saponite; however, their reusability has not yet been investigated [16,17]. With the use of different synthesis routes and schemes, the surface area of a pillared form is not as high as that of PCH.…”

Section: Introductionmentioning

confidence: 99%

ZnO-Porous Clay Heterostructure from Saponite as Green Catalyst for Citronellal Cyclization

Rubiyanto

Prakoso

Sahroni

et al. 2019

Bull. Chem. React. Eng. Catal.

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Green conversion in organic synthesis is one of the interesting and important topics in green chemistry. The use of heterogeneous catalysis instead of homogeneous catalysis offers some advantages, such as easy separation and reusability. In this research, a heterogeneous acid catalyst was prepared from saponite by immobilizing ZnO in the form of a pillared clay (Zn/PILS) and Zn supported on porous clay heterostructure (Zn/PCH). Physicochemical studies involving X-ray diffraction measurement, surface analysis using a gas sorption analyzer, and surface acidity measurement were performed. Results indicated that the increasing surface acidity and the high specific surface area of the material were the relevant physicochemical properties that facilitate environment-friendly citronellal cyclization. The higher values for both parameters in Zn/PCH than in Zn/PILS linearly affected citronellal conversion and the selectivity for isopulegol production. Zn/PCH demonstrated a conversion rate of 98.9% for a 3-hour reaction and a selectivity of 100% for isopulegol production, and it exhibited reusability properties. Copyright © 2020 BCREC Group. All rights reserved

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