Catalytic activity of Mn(III) and Fe(III) porphyrins supported onto multi-walled carbon nanotubes in the green oxidation of organic dyes with hydrogen peroxide: a comparative study

Rayati, Saeed; Sheybanifard, Zahra

doi:10.1007/s13738-015-0763-0

Cited by 15 publications

(7 citation statements)

References 30 publications

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“…6,7 Therefore, significant effort has been devoted to the chemical functionalization of MWC-NTs, mainly to enhance their solubility and to improve their compatibility in MWCNT-based nanohybrid systems. [8][9][10] Linking of electron donor such as porphyrin chromophore to MWCNT as acceptor (D-A) through a covalent bond is expected to facilitate the development of hybrid materials with improved solubility and photoelectronic properties through a synergistic * For correspondence effects. [11][12][13] Porphyrins are thermally stable, light harvesting molecules that show excellent nonlinear optical properties owing to their extensive π-electron delocalization.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photoluminescence properties of tetra(aminophenyl) porphyrin covalently linked to multi-walled carbon nanotubes

2017

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Synthesis of a new nano hybrid of 5,10,15,20-mesotetra(4-aminophenyl) porphyrin (TAP) functionalized with multi-walled carbon nanotubes (MWCNTs) through an amide linkage is reported for the first time. This MWCNT-TAP hybrid was characterized by Raman, Fourier transform infrared (FT-IR), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), absorption and emission spectroscopy. TGA analysis reveals that there is a ∼60% weight loss when heated from 150-750 • C, which is attributed to the amount of TAP molecules that were attached to MWCNTs. Electronic properties of MWCNTs were improved in the hybrid compared to raw MWCNTs as evidenced by Raman spectra. The absorption and emission spectra of TAP and nano-hybrid indicate strong positive solvatochromism with increasing solvent polarity. Fluorescence quenching of TAP in different solvents were observed in the emission spectra in the MWCNT-TAP hybrid, indicating that covalent functionalization facilitated effective energy or electron transfer from porphyrin moiety to the MWCNT.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photoluminescence properties of tetra(aminophenyl) porphyrin covalently linked to multi-walled carbon nanotubes

2017

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“…Metal center of metalloporphyrins can strongly affect the catalytic activity of porphyrin-based catalysts and among the various transition metals, iron and manganese porphyrins can display notable catalytic efficiency for the oxidation reactions. [46][47][48] The importance of the nature of catalyst support and metal center of porphyrin on the catalytic efficiency of nanohybrids for aerobic oxidation of alcohols was investigated in the oxidation of benzyl alcohol on the optimal conditions (see footnote Figure 6) and the results are shown in Figure 7.…”

Section: Chemistryselectmentioning

confidence: 99%

Comparison of the Two Carbon Allotropes as Solid Support: Catalytic Efficiency of the Supported Metalloporphyrins for the Aerobic Oxidation of Alcohols

Nejabat

Rayati

2022

ChemistrySelect

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In the present research, a new method for the aerobic oxidation of aromatic and cyclic aliphatic alcohols to the corresponding aldehydes or ketone was developed in the presence of two supported metalloporphyrins. The prepared heterogenized catalysts were fully characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM), thermogravimetric analysis (TGA), atomic absorption spectroscopy (AAS), Fourier Transform Infrared (FT‐IR) and Ultra Violet‐Visible (UV‐Vis) spectroscopy. The role of structural and textural properties of carbon‐based materials as solid support on the catalytic efficiency of the supported catalysts was compared with each other and the results shows higher efficiency of the supported Fe‐porphyrin on multi‐walled carbon nanotube [Fe(THPP)Cl/MWCNT] compared to the anchored Fe‐porphyrin on the graphene oxide [Fe(THPP)Cl/GO]. The study on the aerobic oxidation of alcohols in the presence of the supported Fe‐porphyrins proved that the addition of isobutyraldehyde as reducing agent in several portions during the catalytic reaction significantly increased the product yields. The separation and recovery of the nanocatalyst was simple, effective and economical in this green oxidation method and the supported catalyst can reuse at least eight times without significant loss of activity.

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“…Sadly, the most active oxidizing agents are very often unstable species, could in turn release exhaust products causing environmental and toxicological concerns, and are unacceptably expensive. In this sense, hydrogen peroxide represents a good compromise between cost and effectiveness [28,185]: It is reasonably stable and safe for production, transport, storage, delivery, and usage.Its relatively low price has allowed a more and more wide use in many technological applications.Last but not least, side products arising from its action are only water and molecular oxygen, causing no environmental and toxicological concern.…”

Section: Application Of Metalloporphyrins In the Decolorization Ofmentioning

confidence: 99%

“…A number of published studies are devoted to the assessment of the usefulness of redox-active metalloporphyrins as “generic” decolorizing catalysts rather than to the study of bleaching mechanisms of selected dyes. Among these, a comparative study involving two metalloporphyrin catalysts, namely the manganese and iron complexes of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP), acting as promoters of oxidative bleaching of four dyes by H 2 O 2 has been reported [185]. The tested dyes were Methyl Orange, Crystal Violet, Methylene Blue, and Congo Red: azo, triphenylmethane, and thiazine dye classes were therefore represented.…”

Section: Application Of Metalloporphyrins In the Decolorization Ofmentioning

confidence: 99%

Immobilized Lignin Peroxidase-Like Metalloporphyrins as Reusable Catalysts in Oxidative Bleaching of Industrial Dyes

et al. 2016

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Synthetic and bioinspired metalloporphyrins are a class of redox-active catalysts able to emulate several enzymes such as cytochromes P450, ligninolytic peroxidases, and peroxygenases. Their ability to perform oxidation and degradation of recalcitrant compounds, including aliphatic hydrocarbons, phenolic and non-phenolic aromatic compounds, sulfides, and nitroso-compounds, has been deeply investigated. Such a broad substrate specificity has suggested their use also in the bleaching of textile plant wastewaters. In fact, industrial dyes belong to very different chemical classes, being their effective and inexpensive oxidation an important challenge from both economic and environmental perspective. Accordingly, we review here the most widespread synthetic metalloporphyrins, and the most promising formulations for large-scale applications. In particular, we focus on the most convenient approaches for immobilization to conceive economical affordable processes. Then, the molecular routes of catalysis and the reported substrate specificity on the treatment of the most diffused textile dyes are encompassed, including the use of redox mediators and the comparison with the most common biological and enzymatic alternative, in order to depict an updated picture of a very promising field for large-scale applications.

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Catalytic activity of Mn(III) and Fe(III) porphyrins supported onto multi-walled carbon nanotubes in the green oxidation of organic dyes with hydrogen peroxide: a comparative study

Cited by 15 publications

References 30 publications

Synthesis, characterization and photoluminescence properties of tetra(aminophenyl) porphyrin covalently linked to multi-walled carbon nanotubes

Synthesis, characterization and photoluminescence properties of tetra(aminophenyl) porphyrin covalently linked to multi-walled carbon nanotubes

Comparison of the Two Carbon Allotropes as Solid Support: Catalytic Efficiency of the Supported Metalloporphyrins for the Aerobic Oxidation of Alcohols

Immobilized Lignin Peroxidase-Like Metalloporphyrins as Reusable Catalysts in Oxidative Bleaching of Industrial Dyes

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