Dispersed copper nanoparticles promote the electron mobility of nitrogen-rich graphitized carbon aerogel for electrochemical determination of 4-nitrophenol

Gong, Shanhe; Xiao, Xinxin; Sam, Daniel Kobina; Liu, Botao; Wei, Wei; Lv, Xiaomeng

doi:10.1007/s00604-019-3841-7

Cited by 20 publications

(5 citation statements)

References 34 publications

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“…In Figure 8(D), peaks at BE at 933 eV and 953.2 eV are the indicative of the existence of the Cu (II) ion in the complex state (Cu−N). The two satellite peaks at 943.1 eV and 970.7 eV were the peaks for dissociative Cu (II) [59] …”

Section: Resultsmentioning

confidence: 99%

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Reusable Cu‐Poly(4‐vinylpyridine‐co‐ethylbenzene) Complex as Catalyst for Chan‐Lam C−N Cross Coupling

Talukdar,

Phukan

2024

ChemistrySelect

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A novel heterogeneous polymer supported catalyst Cu‐PVPEVB has been developed by complexation of CuI in the matrix of the polymer poly(4‐vinylpyridine‐co‐ethylvinylbenzene). Characterization of the catalyst using different spectroscopic techniques revealed that the copper metal is bound through the pyridine substructure of the polymer. The versatility of the catalyst was established by utilizing it for Chan‐Lam coupling reactions in an eco‐friendly solvent methanol. High yields of C−N cross coupled products are obtained within a short time in presence of K2CO3 and 10 weight % of the catalyst having 13.6 weight % of copper. The catalyst could be recovered after carrying out the reaction by simple filtration and reused. Additionally, among a variety of N‐functionalized products synthesized during this study, an N‐phenyl isatin derivative was found to be promising candidate as a fluorescent probe for detection of the Hg2+ ion in aqueous acetonitrile solution.

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Section: Resultsmentioning

confidence: 99%

“…The two satellite peaks at 943.1 eV and 970.7 eV were the peaks for dissociative Cu (II). [59] The analysis of DRS-UV and XPS data reveals that the oxidation state of the copper ion in the Cu-PVPEVB complex is + 2. The EDX analysis indicates the presence of 13 weight % of Cu in the polymeric catalyst.…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Reusable Cu‐Poly(4‐vinylpyridine‐co‐ethylbenzene) Complex as Catalyst for Chan‐Lam C−N Cross Coupling

Talukdar,

Phukan

2024

ChemistrySelect

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“…Moreover, these compounds severely affect plants’ growth through water contamination (0.7 mM/L of nitrophenols) [ 7 ]. However, huge quantities of nitrophenols are used in various industries such as pharmaceuticals, pesticides, dyes, and explosives [ 8 , 9 , 10 ], leading to nitrophenol isomers being present not just in water sources but also in soil samples. In particular, nitrophenols are largely found in different kinds of environmental water samples due to their easy solubility and high stability in aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Pre-Anodized Graphite Pencil Electrode Coated with a Poly(Thionine) Film for Simultaneous Sensing of 3-Nitrophenol and 4-Nitrophenol in Environmental Water Samples

Sree

Sohn

2022

Sensors

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A very simple, as well as sensitive and selective, sensing protocol was developed on a pre-anodized graphite pencil electrode surface coated using poly(thionine) (APGE/PTH). The poly(thionine) coated graphite pencil was then used for simultaneous sensing of 3-nitrophenol (3-NP) and 4-nitrophenol (4-NP). The poly(thionine) coated electrode exhibited an enhanced electrocatalytic property towards nitrophenol (3-NP and 4-NP) reduction. Redox peak potential and current of both nitrophenols were found well resolved and their simultaneous analysis was studied. Under optimized experimental conditions, APGE/PTH showed a long linear concentration range from 20 to 230 nM and 15 nM to 280 nM with a calculated limit of detection (LOD) of 4.5 and 4 nM and a sensitivity of 22.45 µA/nM and 27.12 µA/nM for 3-NP and 4-NP, respectively. Real sample analysis using the prepared sensor was tested with different environmental water samples and the sensors exhibited excellent recovery results in the range from 98.16 to 103.43%. Finally, the sensor exposed an promising selectivity, stability, and reproducibility towards sensing of 3-NP and 4-NP.

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“…Among the numerous metallic nanomaterials such as silver and gold, copper (Cu) is one thousand times more abundant than silver in the earth’s crust, it is one hundred times cheaper than silver, and it is six thousand times cheaper than gold. In recent decades, Cu has received considerable attention due to its inexpensiveness, high abundance, good electrical conductivity, and wide application in various fields, such as catalysis (4-nitrophenol reduction, electrocatalytic oxygen reduction, and electrocatalytic carbon dioxide reduction), as antibacterial agents, in electronic devices (electronic ink and flexible transparent electrodes), and in electrochemical sensors (hydrogen peroxide, glucose, and dopamine) [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. The performance of nanoparticles in various applications greatly depends on their morphologies and surface chemistries [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Copper Nanoplates in Aqueous Phase and Electrochemical Detection of Dopamine

Tang

Zhang

et al. 2022

Life

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Compared with gold and silver, cheap copper has attracted more attention and can potentially be applied in non-enzymatic electrochemical sensors due to its excellent conductivity and catalytic activity. In this paper, copper nanoplates were rapidly synthesized using copper bromide as the copper precursor, polyethyleneimine as the stabilizer, and ascorbic acid as a reducing agent in the presence of silver nanoparticles at a reaction temperature of 90 °C. The Cu nanoplates with an average side length of 10.97 ± 3.45 μm were obtained after a short reaction time of 2 h, demonstrating the promoting effect of an appropriate amount of silver nanoparticle on the synthesis of Cu nanoplates. Then, the electrochemical dopamine sensor was constructed by modifying a glass carbon electrode (GCE) with the Cu nanoplates. The results obtained from the test of cyclic voltammetry and chronoamperometry indicated that the Cu-GCE showed a significant electrochemical response for the measurement of dopamine. The oxidation peak current increased linearly with the concentration of dopamine in the range of 200 µmol/L to 2.21 mmol/L, and the corresponding detection limit was calculated to be 62.4 μmol/L (S/N = 3). Furthermore, the anti-interference test showed that the dopamine sensor was not affected by a high concentration of ascorbic acid, glucose, uric acid, etc. Therefore, the constructed Cu-GCE with good selectivity, sensitivity, and stability possesses a high application value in the detection of dopamine.

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Dispersed copper nanoparticles promote the electron mobility of nitrogen-rich graphitized carbon aerogel for electrochemical determination of 4-nitrophenol

Cited by 20 publications

References 34 publications

Reusable Cu‐Poly(4‐vinylpyridine‐co‐ethylbenzene) Complex as Catalyst for Chan‐Lam C−N Cross Coupling

Reusable Cu‐Poly(4‐vinylpyridine‐co‐ethylbenzene) Complex as Catalyst for Chan‐Lam C−N Cross Coupling

Pre-Anodized Graphite Pencil Electrode Coated with a Poly(Thionine) Film for Simultaneous Sensing of 3-Nitrophenol and 4-Nitrophenol in Environmental Water Samples

Preparation of Copper Nanoplates in Aqueous Phase and Electrochemical Detection of Dopamine

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