Silver Nanoparticles Modified Graphitic Carbon Nitride Nanosheets as a Significant Bifunctional Material for Practical Applications

Veerakumar, Pitchaimani; Dhenadhayalan, Namasivayam; Lin, King‐Chuen; Liu, Shang-Bin

doi:10.1002/slct.201601919

Cited by 20 publications

(11 citation statements)

References 84 publications

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“…S-GCN displays a wrinkled flakelike structure, which is a typical morphological feature of S-GCN. It can be seen that the obtained MoN particles showed a rodlike shape and possess smooth surfaces, which is in agreement with a previous work . The morphology of the MoN nanorods can be maintained very well with the support of S-GCN (MoN@S-GCN) and the surface becomes a bit rough (see Figure S5).…”

Section: Resultssupporting

confidence: 90%

“…It can be seen that the obtained MoN particles showed a rodlike shape and possess smooth surfaces, which is in agreement with a previous work. 56 The morphology of the MoN nanorods can be maintained very well with the support of S-GCN (MoN@S-GCN) and the surface becomes a bit rough (see Figure S5). The exact structures of the MoN nanorods and MoN@S-GCN nanocomposite were further studied by HR-TEM images (vide infra).…”

Section: ■ Results and Discussionmentioning

confidence: 93%

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MoN Nanorod/Sulfur-Doped Graphitic Carbon Nitride for Electrochemical Determination of Chloramphenicol

Ganesamurthi

Manavalan

Chen

et al. 2020

ACS Sustainable Chem. Eng.

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In the present work, we report a one-step pyrolysis synthesis of molybdenum nitride nanorods (MoN NRs) using ammonium heptamolybdate tetrahydrate as a precursor. Properties of MoN NRs have been improved by the sulfur-doped graphitic carbon nitride (MoN@S-GCN) nanocomposite, which has been used to modify the glassy carbon electrode (GCE) for the electrochemical determination of chloramphenicol (CAP). The large surface area of S-GCN-anchored MoN NRs in the nanocomposite demonstrates a synergistic effect of the transport of a kinetic barrier electron and a well-defined redox cycle within the ferricyanide system. In the electrochemical determination of CAP over MoN@S-GCN/GCE, cyclic voltammetry (CV) showed a superior electrochemical response to the CAP concentration, while bare GCE and other modified GCEs showed an inferior electrochemical response. In addition, different concentrations, scanning rates, and pH electrolyte tests have been performed for MoN@S-GCN/GCE, which verified that it is an appropriate candidate for electrochemical detection of CAP. Differential pulse voltammetry (DPV) in the electrochemical determination of CAP exhibits a low detection limit of 6.9 nM and a sensitivity of 1.0557 μM μA–1 cm–2 for the current response, yielding a linear increase with increasing concentration of CAP from 0.5 to 2450 μM. Moreover, the proposed sensor shows appreciable selectivity and satisfactory recovery for real samples of milk and eye drop solutions.

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Section: Resultssupporting

confidence: 90%

Section: ■ Results and Discussionmentioning

confidence: 93%

MoN Nanorod/Sulfur-Doped Graphitic Carbon Nitride for Electrochemical Determination of Chloramphenicol

Ganesamurthi

Manavalan

Chen

et al. 2020

ACS Sustainable Chem. Eng.

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“…Recently, graphitic carbon nitride (GCN) has attracted widespread attention due to its outstanding and unique chemical, electronic, and ionic conductivity, photosensitivity, electrocatalytic properties, and increased applications. − Due to its low cost, lightweight, easy availability, and remarkably high stability, it has been applied in water splitting, photocatalysis, sensing, , bioimaging, etc. The polymeric nature of GCN is suitable for electrocatalytic materials, which have been used in a wide range of electrochemical sensing of biomolecules, − phenolic compounds, and toxic metal ions .…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Sulfur-Doped Graphitic Carbon Nitride Nanosheets As Metal-Free Catalyst for Electrochemical Sensing and Catalytic Removal of 4-Nitrophenol

Rajkumar

Veerakumar

Chen

et al. 2018

ACS Sustainable Chem. Eng.

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165

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Graphene-like sulfur-containing graphitic carbon nitride (S-GCN) nanosheets were successfully prepared and thoroughly characterized. A simple synthetic method by a thermal condensation approach was reported for the preparation of S-GCN with trithiocyanuric acid (TCA) as precursor. The electrochemical performances of the 4-nitrophenol (4-NP) sensors were assessed by cyclic voltammetry (CV), amperometry, and differential pulse voltammetry (DPV). Ultrathin S-GCN nanosheets have been employed to enhance electrocatalytic activity, showing remarkable electrochemical behavior toward 4-NP. We thus obtained a wide linear response range from 0.05 to 90 μM, a relatively low detection limit (0.0016 μM), and excellent sensitivity in 0.1 M acetate buffer (ABS, pH 5.5), surpassing the existing modified electrodes in the literature. Moreover, the fabricated S-GCN electrode is selective in the presence of many potentially interfering species. As a result, the S-GCN contains (C with N and S) heteroatoms that probably induced the higher electrocatalytic activity and electrical conductivity behavior toward 4-NP. Besides, the structural defect to generate more active sites on the surface of S-GCN that could boost the fast electron transfer is provoked during the reduction of 4-NP. As a consequence, it is probably sensitive enough for quantitative detection of 4-NP in real samples. S-GCN was also applied to the hydrogenation of 4-NP by NaBH4 under ambient conditions. Thus, implementation of S-GCN nanosheets offers the advantages of simplicity, reliability, durability, and low cost.

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“…4-Nitrophenol (4-NP) is one of the most refractory pollutants oen present in industrial effluents, but is important in the preparation of several analgesic and antipyretic drugs such as paracetamol and phenacetin. [22][23][24] In addition, 5-hydroxytryptamine (5-HT, serotonin) is a monoamine neurotransmitter involved in a large number of physiological processes in the digestive system, mood, sleep, emesis, sexuality, and appetite. Changes in serotonin levels within the digestive system can cause neurological disorders and several diseases.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional hexagonal Ni/NiO nanostructures: influence of the core–shell phase on magnetism, electrochemical sensing of serotonin, and catalytic reduction of 4-nitrophenol

et al. 2019

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Ni 0 /NiO (nickel/nickel oxide) core-shell nanostructures were synthesized through a facile combustible redox reaction. Remarkably, the hetero-phase boundary with different crystalline orientations offered dual properties, which helped in bifunctional catalysis. Presence of a metallic Ni phase changed physicochemical properties and some emerging applications (magnetic properties, optical conductivity, electrochemical sensitivity, catalytic behaviour) could be foreseen. Moreover, formation of a NiO layer on metal surface prevented magnetism-induced aggregation, arrested further oxidation by hindering oxygen diffusion, and acted as a good sorbent to enhance the surface adsorption of the analyte.Hexagonal Ni/NiO nanostructures manifested well-defined ferromagnetic behavior and the catalyst could be collected easily at the end of the catalytic reduction. Ni/NiO core-shell catalysts at the nanoscale had outstanding catalytic performance (reduction of 4-nitrophenol to 4-aminophenol) compared with pure NiO catalysts beyond a reaction time of $9 min. The estimated sensitivity, limit of detection and limit of quantification towards the electrochemical sensing of serotonin were 0.185, 0.43 and 1.47 mM mA À1 , respectively. These results suggest that a bifunctional Ni/NiO nanostructure could be a suitable catalyst for electrochemical detection of serotonin and reduction of 4-nitrophenol.

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Silver Nanoparticles Modified Graphitic Carbon Nitride Nanosheets as a Significant Bifunctional Material for Practical Applications

Cited by 20 publications

References 84 publications

MoN Nanorod/Sulfur-Doped Graphitic Carbon Nitride for Electrochemical Determination of Chloramphenicol

MoN Nanorod/Sulfur-Doped Graphitic Carbon Nitride for Electrochemical Determination of Chloramphenicol

Ultrathin Sulfur-Doped Graphitic Carbon Nitride Nanosheets As Metal-Free Catalyst for Electrochemical Sensing and Catalytic Removal of 4-Nitrophenol

Bifunctional hexagonal Ni/NiO nanostructures: influence of the core–shell phase on magnetism, electrochemical sensing of serotonin, and catalytic reduction of 4-nitrophenol

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