Fabrication of novel hierarchically ordered porous magnetic nanocomposites for bio-catalysis

Sen, Tapas; Bruce, Ian J.; Mercer, Tim

doi:10.1039/c0cc01747g

Cited by 39 publications

(21 citation statements)

References 20 publications

(28 reference statements)

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“…Amount of studies have focused on the fabrication of the HMS with the specific size and structure together with the surface functionalities [4,5]. Typically, HMS have been prepared via the template-assisted methodology including both soft-template and hard-template types [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Wang

Tang

Zhang

et al. 2012

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Wang

Tang

Zhang

et al. 2012

Journal of Colloid and Interface Science

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“…Mehrasbi et al [106] covalently immobilized a lipase Candida antarctica on functionalized magnetic nanoparticles to catalyze the synthesis of biodiesel. Core-shell nanoparticles were, then, synthesized by coating Fe 3 O 4 core with silica shell (Fe 3 O 4 @SiO 2 ).…”

Section: Nanocompositementioning

confidence: 99%

A Review on Bio-Based Catalysts (Immobilized Enzymes) Used for Biodiesel Production

Santos¹,

Puna

Gomes

2020

Energies

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The continuous increase of the world’s population results in an increased demand for energy drastically from the industrial and domestic sectors as well. Moreover, the current public awareness regarding issues such as pollution and overuse of petroleum fuel has resulted in the development of research approaches concerning alternative renewable energy sources. Amongst the various options for renewable energies used in transportation systems, biodiesel is considered the most suitable replacement for fossil-based diesel. In what concerns the industrial application for biodiesel production, homogeneous catalysts such as sodium hydroxide, potassium hydroxide, sulfuric acid, and hydrochloric acid are usually selected, but their removal after reaction could prove to be rather complex and sometimes polluting, resulting in increases on the production costs. Therefore, there is an open field for research on new catalysts regarding biodiesel production, which can comprise heterogeneous catalysts. Apart from that, there are other alternatives to these chemical catalysts. Enzymatic catalysts have also been used in biodiesel production by employing lipases as biocatalysts. For economic reasons, and reusability and recycling, the lipases urged to be immobilized on suitable supports, thus the concept of heterogeneous biocatalysis comes in existence. Just like other heterogeneous catalytic materials, this one also presents similar issues with inefficiency and mass-transfer limitations. A solution to overcome the said limitations can be to consider the use of nanostructures to support enzyme immobilization, thus obtaining new heterogeneous biocatalysts. This review mainly focuses on the application of enzymatic catalysts as well as nano(bio)catalysts in transesterification reaction and their multiple methods of synthesis.

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“…For recent comprehensive reviews on ordered silicates see [28][29][30][31][32] and references cited therein. Such Silicon, silica & its aminosilanization in nanomedicine Review ordered, porous silicate materials have been used in applications as diverse as energy storage [33,34], heterogeneous catalysis [35,36], adsorption [37], molecular separation [38,39], supports [40], imaging [41], matrices for optical [42], electronic [43] and sensing devices [44,45], to drug-delivery agents [46,47] and tissue engineering [48].…”

Section: Siliconmentioning

confidence: 99%

Silicon, Silica and its Surface Patterning/Activation with Alkoxy- and Amino-Silanes for Nanomedical Applications

et al. 2011

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Silica and silicates are widely used in nanomedicine with applications as diverse as medical device coatings to replacement materials in tissue engineering. Although much is known about silica and its synthesis, relatively few biomedical scientists fully appreciate the link that exists between its formulation and its resultant structure and function. This article attempts to provide insight into relevant issues in that context, as well as highlighting their importance in the material's eventual surface patterning/activation with alkoxy- and organo-silanes. The use of aminosilanes in that context is discussed at some length to permit an understanding of the specific variables that are important in the reproducible and robust aminoactivation of surfaces using such molecules. Recent investigative work is cited to underline the fact that although aminosilanization is a historically accepted mechanism for surface activation, there is still much to be explained about how and why the process works in the way it does. In the last section of this article, there is a detailed discussion of two classical approaches for the use of aminosilanized materials in the covalent immobilization of bioligands, amino-aldehyde and amino-carboxyl coupling. In the former case, the use of the homobifunctional coupler glutaraldehyde is explored, and in the latter, carbodiimides. Although these chemistries have long been employed in bioconjugations, it is apparent that there are still variables to be explored in the processes (as witnessed by continuing investigations into the chemistries concerned). Aspects regarding optimization, standardization and reproducibility of the fabrication of amino functionalized surfaces are discussed in detail and illustrated with practical examples to aid the reader in their own studies, in terms of considerations to be taken into account when producing such materials. Finally, the article attempts to remind readers that although the chemistry and materials involved are 'old hat', there is still much to be learnt about the methods involved. The article also reminds readers that although many highly specific and costly conjugation chemistries now exist for bioligands, there still remains a place for these relatively simple and cost-effective approaches in bioligand conjugate fabrication.

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Fabrication of novel hierarchically ordered porous magnetic nanocomposites for bio-catalysis

Abstract: Novel hierarchically ordered porous magnetic nanocomposites with interconnecting macroporous windows and meso-microporous walls containing well dispersed magnetic nanoparticles have been fabricated and used as a support to immobilise lipase for the efficient hydrolysis of ester.

Cited by 39 publications

References 20 publications

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

Preparation of novel magnetic hollow mesoporous silica microspheres and their efficient adsorption

A Review on Bio-Based Catalysts (Immobilized Enzymes) Used for Biodiesel Production

Silicon, Silica and its Surface Patterning/Activation with Alkoxy- and Amino-Silanes for Nanomedical Applications

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