Lipase immobilized on magnetic multi-walled carbon nanotubes

Tan, Huishan; Feng, Wei; Ji, Peijun

doi:10.1016/j.biortech.2011.10.066

Cited by 83 publications

(54 citation statements)

References 37 publications

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“…Refluxing in the H 2 SO 4 /HNO 3 acid mixture had cut the tangled long fiber of the as-synthesized MWCNTs into shorter, open-ended pipes as well as producing numerous carboxylic groups at the open ends of the nanotubes (Fig. 2b1) (Tan et al, 2012;Liu et al, 1998). Following immobilization of the CRL protein, the diameter of the carbon nanotubes was further increased from 23.5−32.3 nm to 33.9−57.4 nm.…”

Section: Characterization Of Immobilized Lipase (Crl-mwcnts)mentioning

confidence: 97%

“…Following the acidic treatment (H 2 SO 4 :HNO 3 ) of MWCNTs, the oxygenated acidic groups were introduced onto the carbon surface of the MWCNTs. This resulted in the emergence of a new band seen in the region of 1610−1730 cm −1 that corresponded with the existence of carboxylic groups (Tan et al, 2012).…”

Section: Characterization Of Immobilized Lipase (Crl-mwcnts)mentioning

confidence: 98%

“…In this context, a relatively simple cost-effective physical adsorption resulting from weaker unspecific forces is preferred for facilitating easy separation of the biocatalyst from the reaction mixture, without compromising its productivity (Mohamad et al, 2015a). Due to its outstanding mechanical, electrical and thermal properties as well as biocompatibility to CRL (Tan et al, 2012), the surface of acid functionalized MWCNTs (F-MWCNTs) was used for immobilizing the free CRL. Since other studies reported about the use of chemically mediated processes for enzyme immobilization that may be harmful to human and associated with high production costs, while the CRL-MWCNTs evaluated here remained cost-effective and environmentally friendly; its application deserves consideration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sustainable production of the emulsifier methyl oleate by Candida rugosa lipase nanoconjugates

Marzuki

Mahat

Huyop

et al. 2015

Food and Bioproducts Processing

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Section: Characterization Of Immobilized Lipase (Crl-mwcnts)mentioning

confidence: 97%

Section: Characterization Of Immobilized Lipase (Crl-mwcnts)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sustainable production of the emulsifier methyl oleate by Candida rugosa lipase nanoconjugates

Marzuki

Mahat

Huyop

et al. 2015

Food and Bioproducts Processing

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“…Magnetic MWCNTs (M-MWCNTs) were prepared according to the methods reported by Tan et al [30]. 130 mg Iron(II) acetate was grinded and then mixed with 300 mg purified MWCNTs.…”

Section: Grafting Hematinmentioning

confidence: 99%

Specifically Grafting Hematin on MPTS-Coated Carbon Nanotubes for Catalyzing the Oxidation of Aniline

Zheng

et al. 2016

Catalysts

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Abstract:Catalysts supported on nanomaterials have been widely investigated for the treatment of hazardous materials. This work has developed a novel method for grafting hematin on nanomaterials for catalyzing the oxidation of aniline in order to remove aniline from wastewater. Magnetic multi-walled carbon nanotubes (M-MWCNTs) were coated with a layer formed through the hydrolysis and condensation of 3-mercaptopropyltriethoxysilane (MPTS). Hematin was specifically grafted on the MPTS-coated M-MWCNTs through thiol-alkene reaction. Hematin-MPTS-M-MWCNTs were used to catalyze the oxidation of aniline, and a high efficiency has been obtained. Consecutive use of the conjugate of hematin-MPTS-M-MWCNTs has been investigated, and the activity has been retained to a significant extent after five reaction/cleaning cycles. The result demonstrates that hematin-MPTS-M-MWCNTs are efficient for catalyzing the oxidation of aniline. The methodology for the specific grafting of hematin is of general utility, it is an easy-to-operate method and can be extended to other supports. Potentially, hematin-MPTS-based conjugates have a widespread application in catalyzing the removal of aniline from wastewater.

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“…Additionally, some novel magnetic solid acid catalysts have been developed. Their magnetic property can play a key role to economically recover the catalysts from reaction mixtures (Gill et al, 2007;Kara and Erdem, 2011;Pourjavadi et al, 2012;Tan et al, 2012;Zillillah et al, 2012). For instance, Pourjavadi et al (2012) reported the synthesis of heterogeneous acid catalyst in which ferrimagnetic, Fe 3 O 4 , nanoparticles were coated with multiple layers of polyimidazolium functionalized with sulfonic acid by an ionexchange method.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Calcination Temperature on Preparation of a Solid Acid Catalyst by Sulfonation of Single-Walled Carbon Nanohorns Dispersed with Iron Nanoparticles

Poonjarernsilp

Sano

Tamon

2016

J. Chem. Eng. Japan / JCEJ

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The present study investigates a solid acid catalyst synthesized using single walled-carbon nanohorns dispersed with Fe nanoparticles. It was found that this catalyst exhibited a high acid site concentration of 3.6 mmol/g, which was about twice that of the largest record of nanotube-based solid acid catalyst. A two-step process was employed in the catalyst preparation, comprising an acid impregnation step using sulfuric acid, followed by a calcination step in air was performed. This work focused on investigating the in uence of the temperature in the calcination step, which could affect the morphology, the activity, and the magnetic property of the catalyst. X-Ray di raction analysis suggested that the catalysts prepared here with the high acid site concentration included nanoparticles of Fe and Fe 3 O 4 because the Fe nanoparticles in the catalyst could be partially oxidized in the calcination step, while the carbonaceous part of the catalyst became porous to increase the speci c surface area. Although this oxidation caused an obvious reduction in the magnetic susceptibility of the catalyst, the catalyst was able to be magnetically recovered. It was found that the above mentioned high acid site concentration could be achieved by employing the optimum calcination temperature (400°C).

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Lipase immobilized on magnetic multi-walled carbon nanotubes

Cited by 83 publications

References 37 publications

Sustainable production of the emulsifier methyl oleate by Candida rugosa lipase nanoconjugates

Sustainable production of the emulsifier methyl oleate by Candida rugosa lipase nanoconjugates

Specifically Grafting Hematin on MPTS-Coated Carbon Nanotubes for Catalyzing the Oxidation of Aniline

Impacts of Calcination Temperature on Preparation of a Solid Acid Catalyst by Sulfonation of Single-Walled Carbon Nanohorns Dispersed with Iron Nanoparticles

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