Highly efficient, long life, reusable and robust photosynthetic hybrid core–shell beads for the sustainable production of high value compounds

Desmet, Jonathan; Meunier, Christophe; Danloy, Emeric; Duprez, Marie Eve; Lox, Frédéric; Thomas, Diane; Hantson, Anne-Lise; Crine, Michel; Toye, Dominique; Rooke, Joanna C.; Su, Bao‐Lian

doi:10.1016/j.jcis.2015.01.091

Cited by 19 publications

(16 citation statements)

References 55 publications

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“…The obtained particles with sizes typically below 200 nm serve as delivery agents, and can release the drug or internalize into the cell following the destruction of the siliceous shell. Silicic acid condensation in the presence of positively charged surfaces opens new vistas for silicication of relatively large objects such as living cells 104,105,148 which retain viability longer than native cells. Islet cell encapsulation in a siliceous layer has been found to be benecial to extend the survival of the cells.…”

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confidence: 99%

Silicic acid condensation under the influence of water-soluble polymers: from biology to new materials

et al. 2017

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Silicon is among the most abundant elements on the Earth. It occurs in many minerals and plays an important role in several biochemical processes. Some living organisms use silicon dioxide as a substrate for building elements of their bodies. Unicellular diatom algae build frustules from silicon dioxide. The skeleton of siliceous sponges is a silicaprotein composite. Similarly, rice hulls which protect seeds, contain silica as an important component. The living organisms assimilate silicon from the environment in the form of silicic acid. However, the biochemical mechanisms involved in the transformation of silicic acid to solid siliceous materials are still poorly understood.Evidently, condensation of silicic acid in the living organisms proceeds under control of biopolymers and it is important to know how various types of polymers influence the condensation. Bio-inspired chemistry involving the interaction between polymeric silicic acid and functional polymers results in interesting composite materials, including nanoparticles and bulk materials. This review contains a brief description of the mechanism of silicic acid condensation in aqueous medium and also includes a discussion on various precursors of silicic acid. The main focus of the review is on the influence of polymers bearing nitrogen and oxygen-containing functional groups on silicic acid condensation starting from monomer to three-dimensional polymer. Influence of molecular weight of the organic polymer on the condensation and structure of the resulting product is also elaborated. The biological importance of the obtained data and strategies for novel applications of the synthesized composite materials are described in the concluding section of the review. The biomimetic condensation processes open up new vistas for development of novel materials and applications in the biomedical and process industries.

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confidence: 99%

Silicic acid condensation under the influence of water-soluble polymers: from biology to new materials

et al. 2017

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“…Table 4 lists various supports for algal immobilization. Immobilized microalgae can be harvested and converted to produce a variety of applications, including biofuel [3, 13, 58], removal of BOD, COD [112, 113], metal ions [14, 95, 102, 106, 108, 109, 111, 113–124], nonmetals [3, 11, 14, 106, 107, 112, 113, 119, 125–131], and use as a biosensor to measure the degree of water pollution [13, 14], toxicity of substances, and effluents in electronic devices [58] and as photosynthetic solar cells [132]. Table 4 summarizes the related researches on algal immobilization.…”

Section: Algal Immobilizationmentioning

confidence: 99%

Potential of Zeolite and Algae in Biomass Immobilization

Moghaddam

Harun

Mokhtar

et al. 2018

BioMed Research International

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The interest in utilizing algae for wastewater treatment has been increased due to many advantages. Algae-wastewater treatment system offers a cost-efficient and environmentally friendly alternative to conventional treatment processes such as electrocoagulation and flocculation. In this biosystem, algae can assimilate nutrients in the wastewater for their growth and simultaneously capture the carbon dioxide from the atmosphere during photosynthesis resulting in a decrease in the greenhouse gaseousness. Furthermore, the algal biomass obtained from the treatment process could be further converted to produce high value-added products. However, the recovery of free suspended algae from the treated effluent is one of the most important challenges during the treatment process as the current methods such as centrifugation and filtration are faced with the high cost. Immobilization of algae is a suitable approach to overcome the harvesting issue. However, there are some drawbacks with the common immobilization carriers such as alginate and polyacrylamide related to low stability and toxicity, respectively. Hence, it is necessary to apply a new carrier without the mentioned problems. One of the carriers that can be a suitable candidate for the immobilization is zeolite. To date, various types of zeolite have been used for the immobilization of cells of bacteria and yeast. If there is any possibility to apply them for the immobilization of algae, it needs to be considered in further studies. This article reviews cell immobilization technique, biomass immobilization onto zeolites, and algal immobilization with their applications. Furthermore, the potential application of zeolite as an ideal carrier for algal immobilization has been discussed.

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“…No aggregation was observed based on EDS/mapping images, on the contrary silica was distributed homogeneously in alginate gel, which is important for achieving appropriate porous structure. Desmet et al [4] formulated alginate-silica hybrid beads by using diffusion gelation method where silicic acid was used as a silica precursor. On the other hand, PDADMAC (0.4% w/w) did not have a significant effect on the pore volume.…”

Section: Characterization Of Alginate-silica Hybrid Monolithsmentioning

confidence: 99%

“…Xu and Lee [45] synthesized hybrid silica-based monolith using TMOS as a silica precursor and modified with 3-mercaptopropyltrimethoxysilane, which yielded a surface area of 467 m 2 /g. Desmet et al [4] formulated alginate-silica hybrid beads by using diffusion gelation method where silicic acid was used as a silica precursor. The surface areas ranged between 592 to 665 m 2 /g and pore volume changed from 1.26 to 3.02 cm 3 /g.…”

Section: Characterization Of Alginate-silica Hybrid Monolithsmentioning

confidence: 99%

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Synthesis of alginate‐silica hybrid hydrogel for biocatalytic conversion by β‐glucosidase in microreactor

Onbas

Yeşil-Çeliktaş

2018

Engineering in Life Sciences

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The organic–inorganic hybrid materials have been used in different fields to immobilize biomolecules since they offer many advantages. The aim of this study was to optimize and characterize the alginate‐silica hybrid hydrogel as a stable and injectable form for microfluidic systems using internal gelation method and increase the stability and activity of immobilized enzyme for biocatalytic conversions as well. Characterization was carried out by scanning electron microscopy, energy dispersive spectroscopy/mapping, Brunauer–Emmett–Teller, Barrett–Joyner–Halenda, and Fourier‐transform infrared spectroscopy analyses, and the shrinkages of monoliths were evaluated. Subsequent to optimizing the enzyme concentration (40 μg), hydrolytic conversion of 4‐nitrophenyl β‐d‐glucopyranoside (pNPG) was performed to understand the behavior of the bioconversion in the microfluidic system. The yield was 94% which reached the equilibrium at 24 h indicating that the alginate‐silica gel derived microsystem overcome some drawbacks of monolithic systems. Additionally, bioconversion of Ruscus aculeatus saponins was carried out at the same setup in order to obtain aglycon part, which has pharmaceutical significance. Although pure aglycon could not be achieved, an intermediate compound was obtained based on the HPLC analysis. The developed formulation can be utilized for various life science applications.

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Highly efficient, long life, reusable and robust photosynthetic hybrid core–shell beads for the sustainable production of high value compounds

Cited by 19 publications

References 55 publications

Silicic acid condensation under the influence of water-soluble polymers: from biology to new materials

Silicic acid condensation under the influence of water-soluble polymers: from biology to new materials

Potential of Zeolite and Algae in Biomass Immobilization

Synthesis of alginate‐silica hybrid hydrogel for biocatalytic conversion by β‐glucosidase in microreactor

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