Synthesis of Micro-dumbbell Shaped rGO/ZnO Composite Rods and Its Application Towards as Electrochemical Sensor for the Simultaneous Determination of Ammonia and Formaldehyde Using Hexamine and Its Structural Analysis

Padmalaya, G.; Sreeja, B. S.; Shoba, Siyabonga; Rajavel, R.; Radha, S.; Arivanandan, M.; Shrestha, Sujan

doi:10.1007/s10904-019-01224-x

Cited by 18 publications

(4 citation statements)

References 50 publications

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“…These morphologies have little impact on the structural or optical properties, such as crystal structure or bandgap. The incorporation of ZnO nanoparticles in carbon nanosheets (graphene, graphene oxide, or reduced oxide graphene) allows them to decorate [61] (see Figure 18), anchor [116] (see Figure 19), embed [117] (see Figure 20) in the surface of nanosheet or core-shell nanostructures [118]. Several authors have demonstrated that the incorporation of the ZnO nanoparticles in carbon nanosheets brings with it several advantages such as (a) increase in the crystallinity of ZnO, (b) more intimate contact between the ZnO-rGO interfaces, (c) an excellent graphitic sp2 C=C crystal structure of rGO nanosheets, (d) increase in the specific surfaces area of nanocomposites, (e) an enhanced in the absorption of visible light and an increase in the lifetime of charge carriers (electron (e-) hole (h+)), all of this resulting in a consequent in- SEM images do not give information about the composition of the sample, i.e., SEM images themselves do not tell if the sample is composed of ZnO and carbon nanomaterials.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

et al. 2020

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ZnO is an exciting material for photocatalysis applications due to its high activity, easy accessibility of raw materials, low production costs, and nontoxic. Several ZnO nano and microstructures can be obtained, such as nanoparticles, nanorods, micro flowers, microspheres, among others, depending on the preparation method and conditions. ZnO is a wide bandgap semiconductor presenting massive recombination of the generated charge carriers, limiting its photocatalytic efficiency and stability. It is common to mix it with metal, metal oxide, sulfides, polymers, and nanocarbon-based materials to improve its photocatalytic behavior. Therefore, ZnO–nanocarbon composites formation has been a viable alternative that leads to new, more active, and stable photocatalytic systems. Mainly, graphene is a well-known two-dimensional material, which could be an excellent candidate to hybridize with ZnO due to its excellent physical and chemical properties (e.g., high specific surface area, optical transmittance, and thermal conductivity, among others). This review analyses ZnO–graphene nanocomposites’ recent advances, addressing the synthesis methods and the resulting structural, morphological, optical, and electronic properties. Moreover, we examine the ZnO–graphene composites’ role in the photocatalytic degradation of organic/inorganic pollutants.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

et al. 2020

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“…Formaldehyde (HCHO) is an organic compound utilized in various industrial fields including wood, spinning, medicine, and machinery. − However, the usage of HCHO as a food additive to prevent food spoilage poses a serious risk to human health due to its potential toxicity and carcinogenic properties, leading to irreversible damage to the body. − Consequently, detection of HCHO has become a critical research topic. In current research, feasible methods for detecting HCHO include chromatography, chemiluminescence, piezoelectricity, and electrochemistry. , Particularly, the electrochemical sensor technology possesses high sensitivity, miniaturization, and low cost for electrode production, making it an attractive focus of study for many researchers.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Detection of Formaldehyde by Laser-Induced Graphene-Coated Silver Nanoparticles Electrochemical Sensing Electrodes

Chen,

Ling,

Yuan

et al. 2023

Langmuir

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“…Literature review exhibits that important attention has been engrossed in the electro-oxidation of HCHO for many years [4,[7][8][9][10][11]. Various components have been used for the HCHO electro-oxidation containing Pd electrode [12], Pt nanoparticles/GCE [13], Pt electrode [14], Pt-MnO 2 [15], Cu electrode [6], Cu-Pd [3], Cu/Pd/MWCNTs/CPE [16], Pt-Pd/CNT [17], Au nanoparticles [18], rGO/ZnO composite [19], nickel phosphate/GCE [5], Ni-Pd/GCE [20], nickel phosphate/carbon composite [21], Ni thin lm on SiO 2 /Au [22], Ni(OH) 2 -Pt/Al 2 O 3 [23], Ni(OH) 2 -MIL/CPE [24] and zeolite-modi ed electrodes containing Ni(OH) 2 [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Performance of Nickel Hydroxide-Decorated Microporous Nanozeolite Beta-Modified Carbon Paste Electrode for Formaldehyde Oxidation

Eshagh-Nimvari

Hassaninejad–Darzi

2022

Electrocatalysis

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In this paper, aluminosilicate nanozeolite beta has been prepared and completely described using X-ray diffraction (XRD), nitrogen sorption isotherm, Fourier transform infrared (FT-IR), transmission electron micrograph (TEM) and eld emission scanning electronic microscopy (FESEM) techniques. TEM image of synthesized nanozeolite demonstrates semispherical particles with a uniform morphology and dimensions under 50 nm. The BET surface area, total pore volume and pore diameter of it were attained to be 321 m 2 g − 1 , 0.053 cm 3 g − 1 and 1.22 nm, respectively. The modi ed carbon paste electrode by aluminosilicate nanozeolite beta and nickel hydroxide (Ni(OH) 2 -Beta/CPE) was applied for formaldehyde (HCHO) electro-catalytic oxidation in the alkaline media. The obtained results specify that Ni(OH) 2 -Beta/CPE demonstrates worthy electro-catalytic activity for oxidation of HCHO due to mesoporous construction and the great surface area of nanozeolite beta. The electron-transfer coe cient, catalytic rate constant and diffusion coe cient are found to be 0.69, 2.08×10 6 cm 3 mol − 1 s − 1 and 4.4×10 − 7 cm 2 s − 1 , respectively. The Ni(OH) 2 -Beta/CPE exhibited good reproducibility and stability and it has low price, low background current, simplicity of surface renewal. This modi ed electrode has better poisoning tolerance capability than bare CPE for HCHO electro-catalytic oxidation and is a higher device for the long term accomplishment.

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Synthesis of Micro-dumbbell Shaped rGO/ZnO Composite Rods and Its Application Towards as Electrochemical Sensor for the Simultaneous Determination of Ammonia and Formaldehyde Using Hexamine and Its Structural Analysis

Cited by 18 publications

References 50 publications

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Synthesis, Characterization, and Photocatalytic Performance of ZnO–Graphene Nanocomposites: A Review

Highly Sensitive Detection of Formaldehyde by Laser-Induced Graphene-Coated Silver Nanoparticles Electrochemical Sensing Electrodes

Electrocatalytic Performance of Nickel Hydroxide-Decorated Microporous Nanozeolite Beta-Modified Carbon Paste Electrode for Formaldehyde Oxidation

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