Nickel oxide-deposited cellulose/CNT composite electrode for non-enzymatic urea detection

Nguyen, Nhi Sa; Yoon, Hyon Hee

doi:10.1016/j.snb.2016.05.165

Cited by 46 publications

(25 citation statements)

References 36 publications

(35 reference statements)

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“…Apart from the industrial field, the urea sensor has promising potential for clinical applications because the concentration of urea correlates with diseases such as chronic kidney disease and liver malfunction in the human body. Early detection of urea can provide substantial evidence for early diagnosis of the disease . Most studies on urea biosensors have focused on the use of enzyme‐based catalysts, where urease catalyzes the conversion of urea to carbon dioxide and ammonia.…”

Section: Figurementioning

confidence: 99%

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Ag/ZnO Catalysts with Different ZnO Nanostructures for Non‐enzymatic Detection of Urea

Yoon

Lee

et al. 2018

Electroanalysis

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Silver coated ZnO nanorods and nanoflakes with different crystallographic orientations were synthesized by a combination of sputter deposition and solution growth process. Catalytic properties of morphology‐dependent Ag/ZnO nanostructures were then investigated for urea sensors without enzyme. Ag/ZnO nanorods on carbon electrodes exhibit a higher catalytic activity and an improved efficiency than Ag/ZnO nanoflakes on carbon electrodes. Ag/ZnO nanorod catalysts with more electrochemically surface area (169 cm2 mg−1) on carbon electrode facilitate urea electrooxidation due to easier electron transfer, which further promotes the urea electrolysis. The Ag/ZnO nanorod catalysts also show a significant reduction in the onset voltage (0.410 V vs. Ag/AgCl) and an increase in the current density (12.0 mA cm−2 mg−1) at 0.55 V vs Ag/AgCl. The results on urea electrooxidation show that Ag/ZnO nanostructures can be a potential catalyst for non‐enzymatic biosensors and fuel cells.

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Section: Figurementioning

confidence: 99%

“…In addition, denaturation may result in an alteration of the electrical signals corresponding to the electron transfer that occurs during the oxidation of urea . Such concerns of enzyme‐based biosensors can be overcome by non‐enzymatic biosensors that use metals or metal oxide catalysts to stabilize the performance on urea electrooxidation .…”

Section: Figurementioning

confidence: 99%

Ag/ZnO Catalysts with Different ZnO Nanostructures for Non‐enzymatic Detection of Urea

Yoon

Lee

et al. 2018

Electroanalysis

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“…Concretely, Nguyen et al . developed a highly sensitive non‐enzymatic urea amperometric sensor based on coating a functionalized CNT/cellulose nanocomposite containing NiO nanoparticles on an indium tin oxide glass . The developed nanocomposite sensor, which is stable for at least 2 months, exhibited no significant interference in urine samples, showing a high sensitivity of 371 μA⋅mM ‐1 ⋅cm ‐2 with a linear range of 10 μM to 1.4 mM, and a fast response time (4 s).…”

Section: Common (Bio)modifiers and Their Performancementioning

confidence: 99%

“…This fact is because of the fast electron transfer ability of some carbonaceous fillers, which combined with the nanoparticles properties, favors an enhancement of the electron transfer between analyte-electrode, decreasing the overpotentials of several analytically important electrochemical reactions [123]. Concretely, Nguyen et al developed a highly sensitive non-enzymatic urea amperometric sensor based on coating a functionalized CNT/ cellulose nanocomposite containing NiO nanoparticles on an indium tin oxide glass [124]. The developed nanocomposite sensor, which is stable for at least 2 months, exhibited no significant interference in urine samples, showing a high sensitivity of 371 mA·mM -1 ·cm -2 with a linear range of 10 mM to 1.4 mM, and a fast response time (4 s).…”

Section: Nanoparticlesmentioning

confidence: 99%

Customized Bio‐functionalization of Nanocomposite Carbon Paste Electrodes for Electrochemical Sensing: A Mini Review

Muñoz

Baeza

2017

Electroanalysis

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Over the past few decades, the (bio)functionalization of carbon nanomaterials (CNMs), such as nanohorns, carbon nanotubes, graphene, graphite and related with a wide range of (bio)modifiers have been extensively studied for their incorporation on different pure metal or carbon electrode surfaces via drop‐casting. However, CNMs are also shown to be important functional additives for polymers, having great potential to produce rigid nanocomposite materials with a range of enhanced properties, including mechanical, optical, electrical, thermal and electrochemical. The high malleability derived from the host polymer allows alternative strategies that can be carried out in order to incorporate different types of (bio)modifiers in/on/into a polymeric nanocomposite electrode. Accordingly, this mini review overviews the main methodologies used for the bio‐functionalization of electrochemical transducers based on nanocomposite carbon paste electrodes (NC‐CPEs). Additionally, the most extensively (bio)modifiers used in electrochemical (bio)sensing, together with their various electrocatalytical performance are also discussed, fact that might serve as a general outlook for planning further research.

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“…Therefore, developing a rapid, simple, convenient and sensitive method for the determination of urea has become increasingly important. [5][6][7][8] Non-enzymatic biosensors with metal oxide-based electrocatalysts have received widespread interest for their high sensitivity and stability in sensing responses. [9] Different lowcost metal oxides, such as NiO, CuO, and ZnO, with welldefined redox properties [9] have been employed for direct electro-catalytic oxidation and the determination of many biochemically important compounds, such as urea, glucose, and dopamine.…”

Section: Introductionmentioning

confidence: 99%

Free‐Standing NiO Nanosheets as Non‐Enzymatic Electrochemical Sensors

et al. 2020

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A simple, rapid and sensitive electrochemical sensor for determination of urea has been developed based on two‐dimensional (2D) Free‐standing NiO nanosheet. High quality, ultrathin two‐dimensional NiO nano‐sheets were synthesized by using graphene oxide paper as sacrificial template. Various techniques such as x‐ray diffraction (XRD), x‐ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscopy (TEM) were used to characterize the morphology of the nanostructure. According to TEM image, the average size of the as‐synthesized NiO nanosheets is around 50 nm and with 5–20 nm pores. Electrochemical studies indicate that the 2D NiO papers exhibit excellent stability and high electrocatalytic activity for the oxidation of urea in an alkaline medium, even without any conductive supporting agent, and low oxidation potential (vs SCE), high sensitivity (3.4 A/M cm2) and a low detection limit (2 μM) as a non‐enzymatic sensor for urea.

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Nickel oxide-deposited cellulose/CNT composite electrode for non-enzymatic urea detection

Cited by 46 publications

References 36 publications

Ag/ZnO Catalysts with Different ZnO Nanostructures for Non‐enzymatic Detection of Urea

Ag/ZnO Catalysts with Different ZnO Nanostructures for Non‐enzymatic Detection of Urea

Customized Bio‐functionalization of Nanocomposite Carbon Paste Electrodes for Electrochemical Sensing: A Mini Review

Free‐Standing NiO Nanosheets as Non‐Enzymatic Electrochemical Sensors

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