Metal Oxide Nanoparticles in Electroanalysis

Abstract

Many important technological advances have been made in the use of nanotechnology in electroanalysis in recent years. Coupled with the development of electroanalytical techniques for the detection of a wide variety of analytes, a lot of effort has been put into realizing accurate, sensitive, selective, and robust electrochemical assays and sensing devices for both laboratory and point‐of‐care applications. The use of metal oxide nanoparticles, in particular, has led to improvements in sensitivity, selectivity, and multiplexing capacity for the analysis of proteins, nucleic acids, as well as small molecules such as glucose and hydrogen peroxide. This article reviews the progress in the research and development of metal oxide nanoparticle‐based electroanalytical methods with an emphasis on their mechanism, performance and applications together with some discussion on challenges and perspectives in this exciting field.

A Zinc Oxide Nanoflower-Based Electrochemical Sensor for Trace Detection of Sunset Yellow

“…More recently, metal oxide nanoparticles have received much attention in the field of electroanalysis due to the high surface area-to-volume ratios, biocompatibility, chemical stability, surface reaction activity, and adjustable electron transport properties [19,20]. Zinc oxide is a common metal oxide used in the electroanalysis of analytes.…”

Different Electrocatalytic Response Related to the Morphological Structure of TiO2 Nanomaterial: Hydroquinone as an Analytical Probe

“…Where Ai sthe surface area, I peak is the anodic peak current, of the electrode,nthe electron transfer number, Dt he diffusion coefficient, C bulk the concentrationo f K 4 Fe(CN) 6 and n the scan rate.R esults show that microscopic areas were 0.12, 0.17, 0.19 cm 2 for CP,T iO 2 (NP)/ CP,T iO 2 (NF)/CP,r espectively.Based on obtained results, presence of nanofibers in CP surface,e xhibited1 2% and 58 %i mprovement of the active surface area compared to the TiO 2 (NP)/CPa nd CP,r espectively.T his indicates that the presenceo fN Fe nhances the active surface area of the electrode.…”

“…Nanomaterial has attracted much attention because of their different and superior properties compared to the bulk phase. Electronic and optical properties of nanomaterial led to their usage in the field of photocatalysis, photovoltaic, sensing, and photonic crystals . Titanium is the ninth most plenty of element in the Earth's crust.…”

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1IntroductionNanomaterialh as attracted much attention because of their differenta nd superior properties compared to the bulk phase.E lectronic and optical properties of nanomaterial led to their usage in the field of photocatalysis,p hotovoltaic, sensing, and photonicc rystals [1][2][3][4][5][6].T itanium is the ninth most plenty of element in the Earthsc rust. TiO 2 ,acompound of titanium, is used in many applications from photocatalyst, self-cleaning coatings,a nd paints to solar cells and anticorrosion [7][8][9][10].O ne-dimensional nanostructures such as TiO 2 nanowires,n anorods, nanotubes,n anofiber and their composites with TiO 2 nanoparticles have been reviewed to improve the electron mobility and transport rate [11,12].T iO 2 nanoparticles have superp erformancea nd broada pplications as ap hotocatalyst and catalyst, in solar cells,g as sensors,p igments and other devices [13].D ue to the great oxidizing power, high electro stability,r edox selectivity and easy synthesis of TiO 2 ,i ti sv astly used in electrocatalytic applications [14][15][16][17].T he electrochemical behavior of TiO 2 depends on the crystal structure, surface properties and textural properties such as specific surface area, size,v olumea nd distribution.

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A Sensitive and Selective Nitrite Detection in Water Using Graphene/Platinum Nanocomposite

“…In contrast, fabrication of graphene sheets by electrochemical reduction is inexpensive, non‐toxic, green, efficient, and rapid which leads to the use of electrochemically reduced graphene oxide (ErGO) . The conductivity and sensing activity of the ErGO can be further tuned by decorating them with metal nanoparticles (NPs) .…”