Non-enzymatic amperometric detection of phenol and catechol using nanoporous gold

Quynh, Bui Thi Phuong; Byun, Ji Young; Kim, Sang Hoon

doi:10.1016/j.snb.2015.06.067

Cited by 70 publications

(17 citation statements)

References 51 publications

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“…Compared with them, the detection limit of Ni/a-MWCNT was lower than poly(zincon) electrode, 49 although higher than other electrocatalysts. In addition, Ni/a-MWCNT exhibited lower cost and higher sensitivity than nanoporous gold thin¯lm 22 and PtNPsj/polytyramine matrix/graphite electrode. 25 Meantime, linear range of Ni/a-MWCNT was broader than that of poly(pyrrole)-horseradish peroxidase nanobiocomposite.…”

Section: Electrochemical Detection Of Phenol On Ni/a-mwcnt Modi¯ed Gcmentioning

confidence: 99%

“…Nowadays, nonenzymatic catalytic materials with the virtue of insigni¯cant e®ect by exterior environment and high stability have been widely used in electrochemical sensors. [21][22][23][24] In terms of electrochemical detection of phenol, Au and Pt were commonly adopted to determine phenol, 17,22,25 but high cost and scarcity greatly hinder their wide application. Consequently, it is crucial to screen out nonenzymatic electrode material with low cost, excellent sensitivity and stability for electrochemical detection of phenol.…”

Section: Introductionmentioning

confidence: 99%

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Ni Nanoparticle Anchored on MWCNT as a Novel Electrochemical Sensor for Detection of Phenol

Wang

et al. 2018

NANO

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Increasing active sites and enhancing electric conductivity are critical factors to improve sensing performance toward phenol. Herein, Ni nanoparticle was successfully anchored on acidified multi-walled carbon nanotube (a-MWCNT) surface by electroless plating technique to avoid Ni nanoparticle agglomeration and guarantee high conductivity. The crystal structure, phase composition and surface morphology were characterized by XRD, SEM and TEM measurement. The as-prepared Ni/a-MWCNT nanohybrid was immobilized onto glassy carbon electrode (GCE) surface for constructing phenol sensor. The phenol sensing performance indicated that Ni/a-MWCNT/GCE exhibited an amazing detection performance with rapid response time of 4[Formula: see text]s, a relatively wide detection range from 0.01[Formula: see text]mM to 0.48[Formula: see text]mM, a detection limit of 7.07[Formula: see text][Formula: see text]M and high sensitivity of 566.2[Formula: see text][Formula: see text]A[Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text]. The superior selectivity, reproducibility, stability and applicability in real sample of Ni/a-MWCNT/GCE endowed it with potential application in discharged wastewater.

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Section: Electrochemical Detection Of Phenol On Ni/a-mwcnt Modi¯ed Gcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ni Nanoparticle Anchored on MWCNT as a Novel Electrochemical Sensor for Detection of Phenol

Wang

et al. 2018

NANO

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“…Analytes detected by electrochemical biosensing on np-Au include single-stranded DNA, small molecules, metal ions, and various proteins. Unmodified np-Au has also been used for enhanced electrochemical sensing; for example, phenol and catechol can be detected with high sensitivity on a np-Au thin film electrode by applying a suitable potential [ 84 , 85 ]. As another example, a np-Au electrode has been used to detect arsenite ion [As(III)] to a concentration as low as 0.0315 ppb with the sensitivity of 44.64 µA·cm −2 ·mM −1 [ 86 ].…”

Section: Electrochemical Biosensingmentioning

confidence: 99%

Preparation, Modification, Characterization, and Biosensing Application of Nanoporous Gold Using Electrochemical Techniques

et al. 2018

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Nanoporous gold (np-Au), because of its high surface area-to-volume ratio, excellent conductivity, chemical inertness, physical stability, biocompatibility, easily tunable pores, and plasmonic properties, has attracted much interested in the field of nanotechnology. It has promising applications in the fields of catalysis, bio/chemical sensing, drug delivery, biomolecules separation and purification, fuel cell development, surface-chemistry-driven actuation, and supercapacitor design. Many chemical and electrochemical procedures are known for the preparation of np-Au. Recently, researchers are focusing on easier and controlled ways to tune the pores and ligaments size of np-Au for its use in different applications. Electrochemical methods have good control over fine-tuning pore and ligament sizes. The np-Au electrodes that are prepared using electrochemical techniques are robust and are easier to handle for their use in electrochemical biosensing. Here, we review different electrochemical strategies for the preparation, post-modification, and characterization of np-Au along with the synergistic use of both electrochemistry and np-Au for applications in biosensing.

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“…A suitable detection method for these compounds is a need for monitoring its concentration in environment and food products. By applying a suitable detection potential, np-Au electrode can not only detect the phenolic compounds down to few micromolar range [68] but also selectively distinguish one from another [69]. However, np-Au can also be easily modified with biomolecules and different types of other metals for its use in bio/chemical sensing.…”

Section: Chemical Sensormentioning

confidence: 99%

Structure and Applications of Gold in Nanoporous Form

Bhattarai¹,

Neupane²,

Nepal³

et al. 2018

Noble and Precious Metals - Properties, Nanoscale Effects and Applications

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Nanoporous gold (np-Au) has many interesting and useful properties that make it a material of interest for use in many technological applications. Its biocompatible nature and ability to serve as a support for self-assembled monolayers of alkanethiols and their derivative make it a suitable support for the immobilization of carbohydrates, enzymes, proteins, and DNA. Its chemically inert, physically robust and conductive high-surface area makes it useful for the design of electrochemistry-based chemical/bio-sensors and reactors. Furthermore, it is also used as solid support for organic molecular synthesis and biomolecules separation. Its enhanced optical property has application in design of plasmonics-based sensitive biosensors. In fact, np-Au is one of the few materials that can be used as a transducer for both optical and electrochemical biosensing. Due to the presence of low-coordination surface sites, np-Au shows remarkable catalytic activity for oxidation of molecules like carbon monoxide and methanol. Owing to the importance of np-Au, in this chapter we will highlight different strategies of fabrication of np-Au and its emerging applications based on its unique properties.

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Non-enzymatic amperometric detection of phenol and catechol using nanoporous gold

Cited by 70 publications

References 51 publications

Ni Nanoparticle Anchored on MWCNT as a Novel Electrochemical Sensor for Detection of Phenol

Ni Nanoparticle Anchored on MWCNT as a Novel Electrochemical Sensor for Detection of Phenol

Preparation, Modification, Characterization, and Biosensing Application of Nanoporous Gold Using Electrochemical Techniques

Structure and Applications of Gold in Nanoporous Form

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