Development of a robust sulfur quantification and speciation method for SBA-15-supported sulfonic acid catalysts

Noda, Yu; Li, Kaijin; Engler, Alexander M.; Elliott, William A.; Rioux, Robert M.

doi:10.1039/c6cy00292g

Cited by 15 publications

(5 citation statements)

References 58 publications

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“…MCM-41 functionalization may be carried out through a direct synthesis route, which involves a one-step strategy based on co-condensation from two sources of silicas, or via postsynthesis modification. The latter approach involves the surface modification by grafting or coating (Liu et al 2009;Huang et al 2016;Wang et al 2019;Krishna et al 2018;Noda et al 2016). Several studies have described the efficiency in the insertion of acidic groups on the surface of MCM-41 for application in catalysis (Chermahini et al 2015;Díaz et al 2005;Wang et al 2017;Rossetto et al 2018;Mohino et al 2002;Debasish, Jyh-Fu Lee and Cheng 2001).…”

Section: Introductionmentioning

confidence: 99%

Sulfonated MCM-41 as potential catalyst to obtain biolubricants from vegetable oil

Silvestre‐Albero

Maier

Ricardo

et al. 2022

Braz. J. Chem. Eng.

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Biolubricants may be obtained from vegetable oils using appropriate chemical modifications, to improve their physicochemical properties for lubrication applications. In this study, the esterification of a free fatty acid (FFA) with long chain alcohols was performed using sulfonated mesoporous silica as catalyst. Fresh and functionalized MCM-41 samples were prepared to evaluate the effect of the sulfonic surface group on the esterification reaction. MCM-41 was functionalized via post-synthesis modification using 3-mercaptopropyltrimethoxysilane (MPTS) as silylating agent. The synthesized catalysts were characterized using several techniques. After the functionalization, a decrease in the apparent surface area and pore diameter were observed. The MCM-41/SO3H sample was applied in the esterification reaction of oleic acid (as a FFA model) using two different long-chain alcohols (octanol and 2-ethylhexanol). The catalytic results reveal that sulfonated catalyst showed excellent conversions (~100% mol when using octanol and >93% mol using 2-ethylhexanol) and selectivities to esters (ca. 90%).

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Section: Introductionmentioning

confidence: 99%

Sulfonated MCM-41 as potential catalyst to obtain biolubricants from vegetable oil

Silvestre‐Albero

Maier

Ricardo

et al. 2022

Braz. J. Chem. Eng.

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“…The mesoporous solids modified with MPTMS are still extensive investigated as catalysts in different processes, e.g. in esterification reactions [9][10][11] or glycerol dehydration [12], as well as they are applied for adsorption [13] or separation [14] purposes. In this particular work the esterification of acetic acid with n-hexanol was applied as a test reaction.…”

Section: Introductionmentioning

confidence: 99%

Application of microwave radiation in the grafting of acidic sites on SBA-15 type material

2021

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Mesoporous silica of SBA-15 type was modified for the first time with 3-(trihydroxysiyl)-1-propanesulfonic acid (TPS) by post-synthesis modification involving microwave or conventional heating in order to generate the Brønsted acidic centers on the material surface. The samples structure and composition were examined by low temperature N2 adsorption/desorption, XRD, HRTEM, elemental and thermal analyses. The surface properties were evaluated by esterification of acetic acid with n-hexanol used as the test reaction. A much higher efficiency of TPS species incorporation was reached with the application of microwave radiation for 1 h than conventional modification for 24 h. It was found that the structure of mesoporous support was preserved after modification using both methods applied in this study. Materials obtained with the use of microwave radiation showed a superior catalytic activity and high stability.

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“…Several pristine strategies for the preparation of hybrid inorganic‐organic porous solids with different surface functionalities and micro and mesoporous structures with unique morphological and surface features have emerged recently . These materials with the fine control of functionalities and unique structural features fabricated through advanced nano approaches, including soft and hard templating strategie s have been making a significant impact in the field of porous hybrid nanostructures .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

Yadav

Baskaran

Anjali

et al. 2020

Chemistry An Asian Journal

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Organo‐functionalized materials with porous structure offer unique adsorption, catalytic and sensing properties. These unique properties make them available for various applications, including catalysis, CO2 capture and utilization, and drug delivery. The properties and the performance of these unique materials can be altered with suitable modifications on their surface. In this review, we summarize the recent advances in the preparation and applications of organo‐functionalized porous materials with different structures. Initially, a brief historical overview of functionalized porous materials is presented, and the subsequent sections discuss the recent developments and applications of various functional porous materials. In particular, the focus is given on the various methods used for the preparation of organo‐functionalized materials and their important roles in the heterogenization of homogeneous catalysts. A special emphasis is also given on the applications of these functionalized porous materials for catalysis, CO2 capture and drug delivery.

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Development of a robust sulfur quantification and speciation method for SBA-15-supported sulfonic acid catalysts

Abstract: In catalytic applications of surface-modified mesoporous silica materials, distinguishing and quantifying different types of functional groups on the surface is crucial for enabling accurate evaluation of catalytic activity and possible cooperativity among mixed functional groups.

Cited by 15 publications

References 58 publications

Sulfonated MCM-41 as potential catalyst to obtain biolubricants from vegetable oil

Sulfonated MCM-41 as potential catalyst to obtain biolubricants from vegetable oil

Application of microwave radiation in the grafting of acidic sites on SBA-15 type material

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

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