Immobilization of cobalt porphyrin on CeO2@SiO2 core–shell nanoparticles as a novel catalyst for selective oxidation of diphenylmethane

Guo, Xiang; Li, Yuanyuan; Shen, Danhua; Song, Yuanyuan; Wang, Xiao; Liu, Zhigang

doi:10.1016/j.molcata.2012.11.005

Cited by 15 publications

(3 citation statements)

References 27 publications

(31 reference statements)

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“…As observed from Figure S2, the appearance of the band at 963 cm −1 (red) is an indication of the presence of the amid N−H group which is assignable to the presence of hollow porphyrins. 51 Moreover, the appearance of the new absorption band seen at 1009 cm −1 (blue) denotes the presence of Mn(III) ions in the center of the porphyrin during the formation of TCPP(Mn).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

A Portable Electrochemical Sensor Based on Manganese Porphyrin-Functionalized Carbon Cloth for Highly Sensitive Detection of Nitroaromatics and Gaseous Phenol

Boakye

Asinyo

et al. 2022

Langmuir

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Organic pollutants (OPs) have garnered a considerable amount of attention in recent times due to their extreme toxicity toward humans and the ecosystem. The need for an inexpensive yet robust, sensitive, selective, and easy-to-operate method for detecting OPs remains a challenge. Herein, a portable electrochemical sensor is proposed based on manganese porphyrin-functionalized carbon cloth (CC). To explain the electrochemical performance of the sensor, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed. The presence of manganese(III) ion in the center of the porphyrin ligand acted as an agent for the transfer of electrons and enhanced sensitivity toward analytespecific redox catalysis. Moreover, it allowed for the concurrent detection of multiple analytes in a complex environment. The modified CC electrode can selectively detect nitroaromatic and phenolic compounds with accessible data collected through wireless means onto a smartphone device. The as-synthesized electrode demonstrated a higher sensitivity toward the detection of nitrobenzene (NB) and aqueous phenol with a limit of detection (LOD) found to be 5.9268 × 10 −10 M and 4.0178 × 10 −10 M, respectively. Additionally, our proposed portable electrochemical sensor demonstrates a high selectivity and reproducibility toward nitroaromatic and phenolic compounds, which can be employed in real complex water samples. With regard to the sensor's remarkable electrochemical performance, it is envisaged that such a sensor could pave the way for environmental point of care (POC) testing.

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Section: ■ Results and Discussionmentioning

confidence: 99%

A Portable Electrochemical Sensor Based on Manganese Porphyrin-Functionalized Carbon Cloth for Highly Sensitive Detection of Nitroaromatics and Gaseous Phenol

Boakye

Asinyo

et al. 2022

Langmuir

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“…In addition, it is necessary to develop new photocatalysts to overcome main challenges such as the reduced bandgap, increased solar absorption, fast electron–hole recombination, and smooth recovery from the reaction medium. To this end, porphyrin-based hybrid composite materials have been promising photocatalysts for the degradation of organic pollutants in water and have attracted considerable attention in the applied chemistry community over the past decades [ 13 , 14 , 15 , 16 , 17 ]. In this method, porphyrinoids are combined with one or more components, leading to the formation of nonaggregated nanomaterials with controlled surface morphologies.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Composite of Sn(IV)-Porphyrin and Mesoporous Structure for Enhanced Visible Light Photocatalytic Degradation of Organic Dyes

2023

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Two hybrid composites (SnP@MCM−41 and SnP@SiO2) were fabricated by chemical adsorption of (trans-dihydroxo)(5,10,15,20-tetraphenylporphyrinato)tin(IV) (SnP) on mesoporous structured Mobil Composition of Matter No. 41 (MCM−41) and SiO2 nanoparticles. These materials were characterized by Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, fluorescence spectroscopy, transmission electron microscopy, and field-emission scanning electron microscopy techniques. The incorporation of SnP into MCM−41 and SiO2 supports efficient photocatalytic degradation of the anionic erioglaucine, cationic rhodamine B, and neutral m-cresol purple dyes under visible light irradiation in an aqueous solution. The performances of degradation of these dyes by these photocatalysts under visible light irradiation varied from 87 to 95%. The pseudo-first-order degradation rate constant of organic dyes for SnP@MCM−41 was higher than those of SnP@SiO2 and SnP. These visible light photocatalysts showed remarkable stability and reliable reusability.

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“…The efficiency and selectivity of oxidation processes depend on the microenvironment that the metalloporphyrin macrocycle creates around the metal center. In addition, much effort has been devoted to develop heterogeneous metalloporphyrin catalysts on various supports. − …”

Section: Introductionmentioning

confidence: 99%

Zinc Oxide Supported trans-CoD(p-Cl)PPCl-Type Metalloporphyrins Catalyst for Cyclohexane Oxidation to Cyclohexanol and Cyclohexanone with High Yield

Xie

Zhang

Liu

et al. 2015

Ind. Eng. Chem. Res.

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Direct functionalization of saturated C-H bonds by metalloporphyrin catalysts is among the topical and challenging areas within the chemical industry and the synthetic chemistry. In this work, supported CoD(p-Cl)PPCl metalloporphyrin catalysts were prepared and characterized. It has been found that the CoD(p-Cl)PPCl/ZnO catalyst shows better catalytic activity than the supported catalyst (ZrO 2 , MCM-41, kaolin, Zr(OH) 2 and BM) in cyclohexane oxidation with dioxygen. The effects of the reaction pressure, reaction temperature and reaction time on the catalytic activity were considered by the supported CoD(p-Cl)PPCl/ZnO catalyst. The CoD(p-Cl)PPCl/ZnO catalyst can be facilely recovered and was recycled up to seven times without significant decrease in catalytic performance. The average cyclohexane conversion and selectivity to KA oil are 10.98% and 84.34% respectively, and the turnover number is 2.10 x 10 7 .

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Immobilization of cobalt porphyrin on CeO2@SiO2 core–shell nanoparticles as a novel catalyst for selective oxidation of diphenylmethane

Cited by 15 publications

References 27 publications

A Portable Electrochemical Sensor Based on Manganese Porphyrin-Functionalized Carbon Cloth for Highly Sensitive Detection of Nitroaromatics and Gaseous Phenol

A Portable Electrochemical Sensor Based on Manganese Porphyrin-Functionalized Carbon Cloth for Highly Sensitive Detection of Nitroaromatics and Gaseous Phenol

Hybrid Composite of Sn(IV)-Porphyrin and Mesoporous Structure for Enhanced Visible Light Photocatalytic Degradation of Organic Dyes

Zinc Oxide Supported trans-CoD(p-Cl)PPCl-Type Metalloporphyrins Catalyst for Cyclohexane Oxidation to Cyclohexanol and Cyclohexanone with High Yield

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