Biocomposite of nanostructured MnO2 and fique fibers for efficient dye degradation

Chacón-Patiño, Martha L.; Blanco‐Tirado, Cristian; Hinestroza, Juan P.

doi:10.1039/c3gc40911b

Cited by 88 publications

(50 citation statements)

References 51 publications

(53 reference statements)

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“…The m/z peak at 226 is a characteristic peak of ISA, which can be further converted to the anion of m/z 244 by the addition of H 2 O. Both products of m/z 226 and 244 can be identified during indigo carmine degradation by other methods [32][33][34]. These results are consistent with that of the UV-visible spectra, which revealed the characteristic peak of ISA at 235 nm.…”

Section: Indigo Carmine Decolorizationsupporting

confidence: 80%

“…To identify the decolorization products, the solutions before and after laccase treatment were analyzed by LC-MS. The main peak at m/z 421, which corresponds to a single charged anion of indigo carmine [33], was present in the mass spectrum of the initial dye solution (Figure 6a). After 5 h of treatment by laccase, this anion was no longer detected, indicating that the dye was completely biotransformed.…”

Section: Indigo Carmine Decolorizationmentioning

confidence: 99%

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Improving the Indigo Carmine Decolorization Ability of a Bacillus amyloliquefaciens Laccase by Site-Directed Mutagenesis

Wang

Feng

2017

Catalysts

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Indigo carmine is a typical recalcitrant dye which is widely used in textile dyeing processes. Laccases are versatile oxidases showing strong ability to eliminate hazardous dyes from wastewater. However, most laccases require the participation of mediators for efficient decolorization of indigo carmine. Here we describe the improvement of the decolorization ability of a bacterial laccase through site-directed mutagenesis. A D501G variant of Bacillus amyloliquefaciens laccase was constructed and overexpressed in Escherichia coli. The laccase activity in the culture supernatant achieved 3374 U·L −1 for the mutant. Compared with the wild-type enzyme, the D501G exhibited better stability and catalytic efficiency. It could decolorize more than 92% of indigo carmine without additional mediators in 5 h at pH 9.0, which was 3.5 times higher than the wild-type laccase. Isatin sulfonic acid was confirmed to be the main product of indigo carmine degradation by UV-vis and LC-MS analyses.

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Section: Indigo Carmine Decolorizationsupporting

confidence: 80%

Section: Indigo Carmine Decolorizationmentioning

confidence: 99%

Improving the Indigo Carmine Decolorization Ability of a Bacillus amyloliquefaciens Laccase by Site-Directed Mutagenesis

Wang

Feng

2017

Catalysts

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“…Unlike soft cellulosic fibers, these macrofibers are structurally sound, water resistant, and have a heterogeneous surface that facilitates NP size control, dispersion, and stabilization. We believe biocomposites of hard natural fibers and catalytically active nanomaterials (such as ZnO whose photocatalytic oxidation properties have been applied to contaminant degradation, particularly for water treatment processes) could be considered as the ultimate green materials because they exhibit remarkable environmental advantages such as biocompatibility, biodegradability, functionality and the ability to be reused, as we have previously demonstrated with other materials of this kind (Castellanos et al 2012;Chacón-Patiño et al 2013;Ovalle et al 2014). …”

Section: Introductionmentioning

confidence: 79%

“…Cellulose in fique fibers amounts up to 63 % in weight, followed by lignin with 14.5 % in weight and the remaining is composed of hemicellulose and other minor components (Gañán and Mondragon 2002). Our group previously reported on the use of these fibers as solid supports to successfully deposit and stabilize in its surface, a wide range of nanostructures such as noble metals and transition metal oxide nanoparticles (NPs; Castellanos et al 2012;Chacón-Patiño et al 2013).…”

Section: Introductionmentioning

confidence: 98%

“…; Barua et al 2013;Galland et al 2013;Katepetch et al 2013). Applications of these materials range from energy storage, catalytic beds for pollutant capture and degradation, new membranes, smart textiles, antimicrobial elements, screens for electronic applications and magnetic products (Perelshtein et al 2009;Xue et al 2012;Chacón-Patiño et al 2013;Galland et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Controlled synthesis of ZnO particles on the surface of natural cellulosic fibers: effect of concentration, heating and sonication

et al. 2015

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We report on the use of fique natural fibers as solid matrices for the deposition of zinc oxide (ZnO). Fique fibers, native to Colombia, are composed of cellulose (63-70 %) and have a heterogeneous surface morphology with high oxygen density that facilitates metal oxide nanoparticle growth and stabilization. Fique fiber-ZnO biocomposites were synthesized by a co-precipitation method using ZnSO 4 as precursor, NaOH for hydroxide formation and thermal/ ultrasound energy to promote Zn(OH) 2 /Zn(OH) 4 2-decomposition and ZnO formation. The biocomposite was characterized using X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectroscopy with attenuated total reflectance, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. The synthesis of ZnO nanoparticles has been widely reported on inorganic substrates and soft natural fibers; however studies on how experimental parameters affect ZnO features on heterogeneous phase reactions are scarce, as well as the use of hard complex cellulosic fibers as solid supports for its growth. We observed that [OH -]/[Zn 2? ] ratios, heating or sonication time wield a strong influence on the amount, shape, size and distribution of ZnO crystals on the fique fibers; hence confirming the potential of hard natural fibers as surface active materials for novel biocomposites synthesis. We believe these materials, where the hard fiber robustness and the transition metal oxide catalytic properties are synergistically combined, could be promising functional alternatives that will favor a widespread nanoparticle usage for environmental applications such as wastewater treatment processes.

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Supramolecular Gels Derived from the Salts of Variously Substituted Phenylacetic Acid and Dicyclohexylamine: Design, Synthesis, Structures, and Dye Adsorption

Roy

Adalder²,

Dastidar

2018

Chemistry An Asian Journal

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A well-studied supramolecular synthon, namely, secondary ammonium monocarboxylate (SAM), was exploited to generate a new series of organic salts derived from variously substituted phenylacetic acid and dicyclohexylamine as potential low-molecular-weight gelators. As much as 25 % of the SAM salts under study were gelators. The gels were characterized by rheology, and the morphology of the gel networks was studied by high-resolution electron microscopy. Single-crystal and powder XRD data were employed to study structure-property (gelation) correlations. One of the gels could adsorb a hydrophobic dye (Nile Red) more efficiently than that of a hydrophilic dye (Calcein) from dimethyl sulfoxide; this might provide useful clues towards the development of stain-removing gels.

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Biocomposite of nanostructured MnO2 and fique fibers for efficient dye degradation

Cited by 88 publications

References 51 publications

Improving the Indigo Carmine Decolorization Ability of a Bacillus amyloliquefaciens Laccase by Site-Directed Mutagenesis

Improving the Indigo Carmine Decolorization Ability of a Bacillus amyloliquefaciens Laccase by Site-Directed Mutagenesis

Controlled synthesis of ZnO particles on the surface of natural cellulosic fibers: effect of concentration, heating and sonication

Supramolecular Gels Derived from the Salts of Variously Substituted Phenylacetic Acid and Dicyclohexylamine: Design, Synthesis, Structures, and Dye Adsorption

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