scholarly journals Construction and Application of a Non-Enzyme Hydrogen Peroxide Electrochemical Sensor Based on Eucalyptus Porous Carbon

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3464
Author(s):  
Shuisheng Wu ◽  
Nianyuan Tan ◽  
Donghui Lan ◽  
Chak-Tong Au ◽  
Bing Yi
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
Porous Carbon ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
High Sensitivity ◽  
Inert Atmosphere ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Long Term Stability

Natural eucalyptus biomorphic porous carbon (EPC) materials with unidirectional ordered pores have been successfully prepared by carbonization in an inert atmosphere. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) were employed to characterize the phase identification, microstructure and morphology analysis. The carbon materials were used to fabricate electrochemical sensors to detect hydrogen peroxide (H2O2) without any assistance of enzymes because of their satisfying electrocatalytic properties. It was immobilized on a glassy carbon electrode (GCE) with chitosan (CHIT) to fabricate a new kind of electrochemical sensor, EPC/CHIT/GCE, which showed excellent electrocatalytic activity in the reduction of H2O2. Meanwhile, EPC could also promote electron transfer with the help of hydroquinone. The simple and low-cost electrochemical sensor exhibited high sensitivity, and good operational and long-term stability.

Development of Au-Pd@UiO-66-on-ZIF-L/CC as a self-supported electrochemical sensor for in situ monitoring of cellular hydrogen peroxide

2021 ◽  
Author(s):  
Jilin Zheng ◽  
Peng Zhao ◽  
Shiying Zhou ◽  
Sha Chen ◽  
Yi Liang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
Noble Metals ◽  
Electrochemical Sensors ◽  
Metal Organic Frameworks ◽  
Electrochemical Sensing ◽  
In Situ Monitoring ◽  
Metal Organic

Integrating metal-organic frameworks (MOFs) of different components or structures together and exploiting them as electrochemical sensors for electrochemical sensing have aroused great interest. And the incorporation of noble metals with...

Covalent Organic Frameworks for Electrochemical Sensors: Recent Research and Future Prospects

2021 ◽  
Vol 17 ◽  
Author(s):  
Linyu Wang ◽  
Shasha Hong ◽  
Yuxi Yang ◽  
Yonghai Song ◽  
Li Wang
Keyword(s):  
Specific Surface ◽  
Electrochemical Sensors ◽  
Gas Adsorption ◽  
Low Cost ◽  
High Sensitivity ◽  
Crystalline Polymer ◽  
Synthesis Methods ◽  
High Porosity ◽  
Covalent Organic Frameworks ◽  
Covalent Bonds

Background: In recent years, electrochemical sensors are widely preferred because of their high sensitivity, rapid response, low cost and easy miniaturization. Covalent organic frameworks (COFs), a porous crystalline polymer formed by organic units connected by covalent bonds, have been widely used in gas adsorption and separation, drug transportation, energy storage, photoelectric catalysis, electrochemistry and other aspects due to their large specific surface, excellent stability, high inherent porosity, good crystallinity as well as structural and functional controllability. The topological structure of COFs can be designed in advance, the structural units and linkage are diversified, and the structure is easy to be functionalized, which are all beneficial to their application in electrochemical sensors. Methods: The types, synthesis methods, properties of covalent organic frameworks and some examples of using covalent organic frameworks in electrochemical sensors are reviewed. Results: Due to their characteristics of a large specific surface, high porosity, orderly channel and periodically arranged π electron cloud, COFs are often used to immobilize metal nanoparticles, aptamers or other materials to achieve the purpose of building electrochemical sensors with high sensitivity and good stability. Since the structure of COFs can be predicted, different organic units can build COFs with different structures and properties. Therefore, organic units with certain functional groups can be selected to build COFs with certain properties and used directly for electrochemical sensors. Conclusion: COFs have a good application prospect in electrochemical sensors.

Synthesis of Trilaminar Core–Shell Au/α-Fe2O3@SnO2Nanocomposites and their Application for Nonenzymatic Dopamine Electrochemical Sensing

NANO ◽  
2019 ◽  
Vol 14 (11) ◽  
pp. 1950138 ◽  
Author(s):  
Sai Zhang ◽  
Shijun Yue ◽  
Jiajia Li ◽  
Jianbin Zheng ◽  
Guojie Gao
Keyword(s):  
Electron Microscopy ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Synthesis Process ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Long Term Stability ◽  
Transmission Electron

Au nanoparticles anchored on core–shell [Formula: see text]-Fe2O3@SnO2 nanospindles were successfully constructed through hydrothermal synthesis process and used for fabricating a novel nonenzymatic dopamine (DA) sensor. The structure and morphology of the Au/[Formula: see text]-Fe2O3@SnO2 trilaminar nanohybrid film were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The electrochemical properties of the sensor were investigated by cyclic voltammetry and amperometry. The experimental results suggest that the composites have excellent catalytic property toward DA with a wide linear range from 0.5[Formula: see text][Formula: see text]M to 0.47[Formula: see text]mM, a low detection limit of 0.17[Formula: see text][Formula: see text]M (S/[Formula: see text]) and high sensitivity of 397.1[Formula: see text][Formula: see text]A[Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text]. In addition, the sensor exhibits long-term stability, good reproducibility and anti-interference.

KOH-based porous carbon from date palm seed: preparation, characterization, and application to phenol adsorption

2014 ◽  
Vol 70 (10) ◽  
pp. 1633-1640 ◽  
Author(s):  
K. Suresh Kumar Reddy ◽  
Pravin Kannan ◽  
Ahmed Al Shoaibi ◽  
C. Srinivasakannan
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Date Palm ◽  
Low Cost ◽  
Inert Atmosphere ◽  
Average Pore ◽  
Activation Temperature ◽  
Freundlich Isotherms ◽  
Layer Adsorption ◽  
Seed Biomass

The date palm seed being one of the major forms of biomass produced from the date industry in UAE, its potential to be an appropriate precursor for the preparation of porous carbon utilizing KOH as an activating agent is assessed in the present work. The porous carbon is prepared at an activation temperature of 600 °C, impregnation ratio of 2, and activation duration of 1 hour, in an inert atmosphere using a conventional horizontal furnace. The resultant porous carbon has a Brunauer–Emmett–Teller surface area of 892 m2/g, pore volume of 0.45 cm3/g, and an average pore diameter of 1.97 nm. This porous carbon was used for adsorption studies at different initial concentrations (100–400 mg/l) and temperatures (30–50 °C). The adsorption isotherm parameters for the Langmuir and Freundlich models were determined using experimental adsorption data and it was found that both Langmuir and Freundlich isotherms described well the adsorption behavior of phenol on porous carbon. The mono layer adsorption capacity was observed to be 333 mg/g, which is highest for the reported date pam seed biomass-based porous carbon. From the data obtained, it was concluded that the removal of phenol from aqueous solution by porous carbon prepared from data palm seed is a low-cost process with an extremely high performance.

Highly selective zirconia-based propene sensor attached with sol–gel derived NiO nanospheres

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24126-24131 ◽  
Author(s):  
Kamaraj Mahendraprabhu ◽  
Perumal Elumalai
Keyword(s):  
Electrochemical Sensor ◽  
Sol Gel ◽  
High Sensitivity ◽  
Term Stability ◽  
Long Term Stability ◽  
Sensitivity And Selectivity

An YSZ-based electrochemical sensor was fabricated using sol–gel derived NiO nanospheres. The sensor exhibited high sensitivity and selectivity to C3H6 (propene) with excellent long-term stability.

Ultrasensitive electrochemical assay of hydrogen peroxide and glucose based on PtNi alloy decorated MWCNTs

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102877-102884 ◽  
Author(s):  
He Mei ◽  
Huimin Wu ◽  
Wenqin Wu ◽  
Shengfu Wang ◽  
Qinghua Xia
Keyword(s):  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
High Sensitivity ◽  
Linear Range ◽  
Electrochemical Assay ◽  
Wide Linear Range ◽  
Ptni Alloy

A electrochemical sensor based on PtNi/MWCNTs can detect hydrogen peroxide and glucose with wide linear range and high sensitivity.

scholarly journals Electrochemical Sensors and Biosensors for the Analysis of Tea Components: A Bibliometric Review

2022 ◽  
Vol 9 ◽  
Author(s):  
Jinhua Shao ◽  
Chao Wang ◽  
Yiling Shen ◽  
Jinlei Shi ◽  
Dongqing Ding
Keyword(s):  
Bibliometric Analysis ◽  
High Performance ◽  
Electrochemical Sensors ◽  
Materials Science ◽  
Low Cost ◽  
Relevant Literature ◽  
Electrochemical Techniques ◽  
High Sensitivity ◽  
Electrochemical Analysis ◽  
Electrochemical Biosensing

Tea is a popular beverage all around the world. Tea composition, quality monitoring, and tea identification have all been the subject of extensive research due to concerns about the nutritional value and safety of tea intake. In the last 2 decades, research into tea employing electrochemical biosensing technologies has received a lot of interest. Despite the fact that electrochemical biosensing is not yet the most widely utilized approach for tea analysis, it has emerged as a promising technology due to its high sensitivity, speed, and low cost. Through bibliometric analysis, we give a systematic survey of the literature on electrochemical analysis of tea from 1994 to 2021 in this study. Electrochemical analysis in the study of tea can be split into three distinct stages, according to the bibliometric analysis. After chromatographic separation of materials, electrochemical techniques were initially used only as a detection tool. Many key components of tea, including as tea polyphenols, gallic acid, caffeic acid, and others, have electrochemical activity, and their electrochemical behavior is being investigated. High-performance electrochemical sensors have steadily become a hot research issue as materials science, particularly nanomaterials, and has progressed. This review not only highlights these processes, but also analyzes and contrasts the relevant literature. This evaluation also provides future views in this area based on the bibliometric findings.

scholarly journals Carbon Materials in Electroanalysis of Preservatives: A Review

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7630
Author(s):  
Slawomir Michalkiewicz ◽  
Agata Skorupa ◽  
Magdalena Jakubczyk
Keyword(s):  
Carbon Materials ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
Pharmaceutical Preparations ◽  
High Sensitivity ◽  
Potential Range ◽  
Nonaqueous Media ◽  
Voltammetric Analysis ◽  
Materials Used ◽  
Voltammetric Methods

Electrochemical sensors in electroanalysis are a particularly useful and relatively simple way to identify electroactive substances. Among the materials used to design sensors, there is a growing interest in different types of carbon. This is mainly due to its non-toxic properties, low cost, good electrical conductivity, wide potential range, and the possibility of using it in both aqueous and nonaqueous media. The electrodes made of carbon, and especially of carbon modified with different materials, are currently most often used in the voltammetric analysis of various compounds, including preservatives. The objective of this paper is to present the characteristics and suitability of different carbon materials for the construction of working electrodes used in the voltammetric analysis. Various carbon materials were considered and briefly discussed. Their analytical application was presented on the example of the preservatives commonly used in food, cosmetic, and pharmaceutical preparations. It was shown that for the electroanalysis of preservatives, mainly carbon electrodes modified with various modifiers are used. These modifications ensure appropriate selectivity, high sensitivity, low limits of detection and quantification, as well as a wide linearity range of voltammetric methods of their identification and determination.

scholarly journals Enhancement of proton conductivity through Yb and Zn doping in BaCe0.5Zr0.35Y0.15O3-δ electrolyte for IT-SOFCs

2018 ◽  
Vol 12 (2) ◽  
pp. 180-188 ◽  
Author(s):  
Ahmed Afif ◽  
Nikdalila Radenahmad ◽  
Juliana Zaini ◽  
Mohamed Abdalla ◽  
Seikh Rahman ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Thermo Gravimetric Analysis ◽  
Energy System ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Cubic Crystal ◽  
Zn Doping ◽  
Long Term Stability

The new compositions of BaCe0.5Zr0.3Y0.15-xYbxZn0.05O3-? perovskite electrolytes (x = 0.1 and 0.15) were prepared by solid state synthesis and final sintering at 1500?C. The obtained ceramics were investigated using X-ray diffraction, scanning electron microscopy, thermo-gravimetric analysis and impedance spectroscopy. The refinement of XRD data confirmed cubic crystal structure with Pm3m space group for both samples. SEM morphology showed larger and compacted grains which enables obtaining of high density and high protonic conductivity. The relative densities of the samples were about 99% of the theoretical density after sintering at 1500?C. The protonic conductivities at 650?C were 2.8?10-4 S/cm and 4.2?10-3 S/cm for x = 0.1 and 0.15, respectively. The obtained results showed that higher Yb-content increases the ionic conductivity and both of these perovskites are promising electrolyte for intermediate temperature solid oxide fuel cells to get high efficiency, long-term stability and relatively low cost energy system.

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