Enhancement of electrical conductivity and magnetic properties of bimetallic Schiff base complex on grafting to MWCNTs

Gupta, Rashmi; Singh, B.

doi:10.1007/s10854-019-01522-7

Cited by 11 publications

(5 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This increase in diameter could be attributed to the doping of the N atom in the carbon lattice [53] . Similarly, CuPc‐SO 3 − integration on MWCNTs and NMWCNTs also increased the external diameter of the tubes (Figure S3C and S3D) [54] . Figure S3C shows the TEM image of MWCNTs‐CuPc‐SO 3 − in which the CuPc‐SO 3 − is premeditated as a layer on the MWCNTs and the external diameter is increased to 14–23 nm.…”

Section: Resultsmentioning

confidence: 80%

“…[53] Similarly, CuPc-SO 3 À integration on MWCNTs and NMWCNTs also increased the external diameter of the tubes (Figure S3C and S3D). [54] Figure S3C shows the TEM image of MWCNTs-CuPc-SO 3 À in which the CuPc-SO 3 À is premeditated as a layer on the MWCNTs and the external diameter is increased to 14-23 nm. Figure S3D shows the TEM image of NMWCNTs-CuPc-SO 3 À with an external diameter between 25 and 30 nm.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Four‐Electron Selective Oxygen Reduction Reaction at Carbon‐Nanotube‐Supported Sulfonic‐Acid‐Functionalized Copper Phthalocyanine

et al. 2023

View full text Add to dashboard Cite

In the present work, the oxygen reduction reaction (ORR) is explored in an acidic medium with two different catalytic supports (multi‐walled carbon nanotubes (MWCNTs) and nitrogen‐doped multi‐walled carbon nanotubes (NMWCNTs)) and two different catalysts (copper phthalocyanine (CuPc) and sulfonic acid functionalized CuPc (CuPc‐SO3−)). The composite, NMWCNTs‐CuPc‐SO3− exhibits high ORR activity (assessed based on the onset potential (0.57 V vs. reversible hydrogen electrode) and Tafel slope) in comparison to the other composites. Rotating ring disc electrode (RRDE) studies demonstrate a highly selective four‐electron ORR (less than 2.5 % H2O2 formation) at the NMWCNTs‐CuPc‐SO3−. The synergistic effect of the catalyst support (NMWCNTs) and sulfonic acid functionalization of the catalyst (in CuPc‐SO3−) increase the efficiency and selectivity of the ORR at the NMWCNTs‐CuPc‐SO3−. The catalyst activity of NMWCNTs‐CuPc‐SO3− has been compared with many reported materials and found to be better than several catalysts. NMWCNTs‐CuPc‐SO3− shows high tolerance for methanol and very small deviation in the onset potential (10 mV) between the linear sweep voltammetry responses recorded before and after 3000 cyclic voltammetry cycles, demonstrating exceptional durability. The high durability is attributed to the stabilization of CuPc‐SO3− by the additional coordination with nitrogen (Cu‐Nx) present on the surface of NMWCNTs.

show abstract

Section: Resultsmentioning

confidence: 80%

mentioning

confidence: 99%

Enhanced Four‐Electron Selective Oxygen Reduction Reaction at Carbon‐Nanotube‐Supported Sulfonic‐Acid‐Functionalized Copper Phthalocyanine

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The characteristic D bands were formed by disordered sp 3 hybrid carbon atoms, while the characteristic G bands were attributed to sp 2 hybrid carbon atoms. 32 For Pt-Co, the characteristic peaks at 672 cm −1 and 465 cm −1 were found. 33 All the results indicated the successful synthesis of Pt-Co-MWCNTs-COOH composite.…”

Section: Resultsmentioning

confidence: 93%

“…The characteristic D band and G band at 1298 cm −1 and 1585 cm −1 were observed from MWCNTs‐COOH. The characteristic D bands were formed by disordered sp 3 hybrid carbon atoms, while the characteristic G bands were attributed to sp 2 hybrid carbon atoms 32 . For Pt–Co, the characteristic peaks at 672 cm −1 and 465 cm −1 were found 33 .…”

Section: Resultsmentioning

confidence: 98%

Development of a capillary electrophoresis method based on magnetic solid‐phase extraction for simultaneous and sensitive detection of eight biogenic amines in foods

Fan,

Yu,

Waterhouse

et al. 2023

J Sci Food Agric

View full text Add to dashboard Cite

BACKGROUNDBiogenic amines (BAs) in high concentrations are toxic and may cause a series of health symptoms. A sensitive measurement of BA levels is essential for human health. Capillary electrophoresis (CE) has emerged for the separation of eight BAs due to simple sample preparation and highly efficient separation. However, an important drawback for CE is low sensitivity. Magnetic solid‐phase extraction (MSPE) has become a technique of interest owing to its brief operation and low solvent consumption. Hence, MSPE as a pretreatment has great potential to improve CE sensitivity for the analysis of BAs in complex food.RESULTSResults showed that the Pt‐Co‐MWCNTs‐COOH possessed strong magnetism, good reusability, and high adsorptive ability toward eight biogenic amines based on the hydrogen bonding between the −COOH of Pt‐Co‐MWCNTs‐COOH and −NH2 groups of BAs. Using it as an adsorbent, a magnetic solid‐phase extraction coupled with capillary electrophoresis (MSPE‐CE) method was developed to effectively extract and sensitively analyze eight BAs. Under optimal conditions, the MSPE‐CE method has wide linearities (10.0–1000.0 μg L−1) and low limits of detection (1.0–6.1 μg L−1). The accuracy of the developed method yielded recovery values from 82.07% to 102.58%. Meanwhile, the BAs contents in two samples were analyzed using the MSPE‐CE method, with the results consistent with those detected by a high‐performance liquid chromatography method.CONCLUSIONGiven those advantages, the established MSPE‐CE method promises the practical guidance of monitoring a variety of BAs and provides a foundation for the detection of other food hazards. © 2023 Society of Chemical Industry.

show abstract

“…[8] Simultaneously, the improvements of properties have been verified in materials modified by MWCNTs. [9,10] Prussian blue analogues (PBAs) have a crystal structure similar to that of metal-organic skeleton (MOF). Its structure is like NaCl, and two adjacent ions are connected by one cyano.…”

Section: Introductionmentioning

confidence: 99%

Abnormal magnetic behavior of prussian blue analogs modified with multi-walled carbon nanotubes

Xia²,

Shen³

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

This work examines the origin of the abnormal magnetism exhibited by CuMnFe-PBAs modified with Multi-walled Carbon Nanotubes (MWCNTs). The system of CuMnFe-PBAs@MWCNTs coexists with both large and small clusters. CuMnFe-PBAs clusters have an average particle size of 28 nm, and some of the smaller particles are adsorbed on the surface of MWCNTs. Surprisingly, the magnitude of magnetization increases linearly with decreasing temperature. When above the Curie temperature, the magnitude of magnetization is significantly greater than that of PBAs without being modified. This phenomenon can be attributed to magnetostatic interactions between ultra-fine magnetic nanoparticles adsorbed on the surface of MWCNTs. Using the Monte Carlo method, we simulate the magnetostatic interaction of cylindrical adsorbed particles, and the simulation results are almost identical to those observed experimentally. The results indicate that 0.089 CuMnFe-PBAs clusters per 1 nm2 can be adsorbed onto the surface area of MWCNTs. We demonstrate that MWCNTs adsorbing magnetic particles exhibit magnetic behavior, and suggest a method for producing ultrafine materials. It also introduces a new method of calculating the adsorption efficiency of carbon nanotubes, offering theoretical guidance for future research on nanomaterials with enhanced adsorption efficiency.

show abstract

Enhancement of electrical conductivity and magnetic properties of bimetallic Schiff base complex on grafting to MWCNTs

Cited by 11 publications

References 61 publications

Enhanced Four‐Electron Selective Oxygen Reduction Reaction at Carbon‐Nanotube‐Supported Sulfonic‐Acid‐Functionalized Copper Phthalocyanine

Enhanced Four‐Electron Selective Oxygen Reduction Reaction at Carbon‐Nanotube‐Supported Sulfonic‐Acid‐Functionalized Copper Phthalocyanine

Development of a capillary electrophoresis method based on magnetic solid‐phase extraction for simultaneous and sensitive detection of eight biogenic amines in foods

Abnormal magnetic behavior of prussian blue analogs modified with multi-walled carbon nanotubes

Contact Info

Product

Resources

About