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

Rubiyanto, Dwiarso; Prakoso, Nurcahyo Iman; Sahroni, Imam; Nurillahi, Rico; Fatimah, Is

doi:10.9767/bcrec.15.1.5800.137-145

Cited by 10 publications

(8 citation statements)

References 24 publications

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“…The larger pore opening related to the molecular size of the organic compound is a crucial factor for the creation of porous structures [131,134]. The organic matter from the surfactant was removed by thermal treatment at 500 • C. A significantly increasing specific surface area was also reported by dispersed ZnO in the PCH formation from saponite, in comparison with the ZnO/pillared saponite [152]. With the same amount of Zn (10 mmol/g), ZnO-pillared saponite exhibited a specific surface area of 188 m 2 /g; meanwhile, ZnO/PCH showed 770 m 2 /g.…”

Section: Porous Clay Heterostructurementioning

confidence: 99%

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

et al. 2022

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Advanced oxidation processes (AOPs) utilizing heterogeneous catalysts have attracted great attention in the last decade. The use of solid catalysts, including metal and metal oxide nanoparticle support materials, exhibited better performance compared with the use of homogeneous catalysts, which is mainly related to their stability in hostile environments and recyclability and reusability. Various solid supports have been reported to enhance the performance of metal and metal oxide catalysts for AOPs; undoubtedly, the utilization of clay as a support is the priority under consideration and has received intensive interest. This review provides up-to-date progress on the synthesis, features, and future perspectives of clay-supported metal and metal oxide for AOPs. The methods and characteristics of metal and metal oxide incorporated into the clay structure are strongly influenced by various factors in the synthesis, including the kind of clay mineral. In addition, the benefits of nanomaterials from a green chemistry perspective are key aspects for their further considerations in various applications. Special emphasis is given to the basic schemes for clay modifications and role of clay supports for the enhanced mechanism of AOPs. The scaling-up issue is suggested for being studied to further applications at industrial scale.

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Section: Porous Clay Heterostructurementioning

confidence: 99%

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

et al. 2022

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“…Both mono- and bifunctional catalytic systems were observed in the literature. The cyclization has been successfully carried out with silica-supported catalysts − and clay catalysts, − of interest to the student researcher due to their benign nature, often with organic solvents ,,,, and temperatures ranging from room temperature to 120 °C. ,− Most catalyst preparations included acid-loading of the silica or clay solid catalysts, usually by refluxing or mixing the support with acids and then drying at 60–150 °C for 15–24 h. ,− , Some procedures involved additional calcination. ,,, …”

Section: Undergraduate Research Projectmentioning

confidence: 99%

A Green and Efficient Cyclization of Citronellal into Isopulegol: A Guided-Inquiry Organic Chemistry Laboratory Experiment

Ritter

Abraham

2022

J. Chem. Educ.

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This project introduces green chemistry to the undergraduate laboratory through two pedagogical techniques: undergraduate research and guided-inquiry. Through these two learning activities, an efficient synthetic procedure for the PRINS cyclization of citronellal into isopulegol, focused on minimizing negative environmental impact, was developed. This project involved two stages. First, a senior undergraduate student applied the principles of green chemistry to the cyclization of citronellal, a naturally occurring aldehyde, into isopulegol, a commercially important compound. The cyclization reaction was achieved in high yield with montmorillonite (MK10) catalyst in buffer medium at room temperature stirring for 2 h. Second, the student researcher, with faculty supervision, transformed this study into a laboratory experiment for Organic Chemistry II students, using inquiry-based pedagogy. Through this project, the student researcher gained experience applying green chemistry principles in the field and in the classroom. The organic chemistry students likewise benefitted, as they gained autonomy, interest in green chemistry, and confidence in the research process, according to the results of a student survey. Thus, this study allowed both the student researcher and the organic chemistry students to expand their experience, autonomy, and appreciation for and application of green chemistry.

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“…The signi cant role of speci c surface area was summarized from the signi cant increasing citronellal conversion and selectivity toward isopulegol over Zn-dispersed-in-clay, via the formation of a porous clay heterostructure (Zn/PCH), according to (Rubiyanto et al, 2019) . The physicochemical properties increase in line with the increase in catalytic activity and selectivity in the conversion of citronellal to isopulegol, compared to Zn/pillared clay (Zn/PCH).…”

Section: Clay-based Heterogeneous Catalystsmentioning

confidence: 99%

Heterogeneous Catalytic Conversion of Citronellal into Isopulegol and Menthol: Literature Review

Yahya

Rubiyanto

Fatimah

2021

sci. technol. indones.

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The conversion of citronellal into isopulegol is a key route in the production of a number of important chemicals. In the perspective of green conversion, the use of a heterogeneous catalyst is superior due to its ease in separation and reusability, so it facilitates a highly economical conversion. In this review, we examine the use of some transition metals in cyclization reactions, which are suitable for citronellal conversion into isopulegol, and consider the potential progress in clay-based catalysts. The structure of clay which potentially provides the porosity by modification and supporting active metal is proposed to be the low-cost catalyst for the conversion. As other mechanism by porous materials-supported metal, the porosity of clay support contributes to conduct thesurface adsorption mechanism and the Broensted acid supply, meanwhile the metal acts as active site for cyclization, and in the one-pot conversion into menthol, as both cyclization and hydrogenation.

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

Cited by 10 publications

References 24 publications

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

A Green and Efficient Cyclization of Citronellal into Isopulegol: A Guided-Inquiry Organic Chemistry Laboratory Experiment

Heterogeneous Catalytic Conversion of Citronellal into Isopulegol and Menthol: Literature Review

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