Rapid synthesis of hollow Ni(OH)2 with low-crystallinity for the electrochemical detection of ascorbic acid with high sensitivity

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43598-43604 ◽  
Author(s):  
Delun Chen ◽  
Yang Cao ◽  
Yong Chen ◽  
Wei Huang ◽  
Bingrong Wang ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Detection Limit ◽  
Electrochemical Detection ◽  
High Sensitivity ◽  
Linear Range ◽  
Rapid Synthesis ◽  
Ascorbic Acid Detection ◽  
Low Crystallinity

Ni(OH)2 performed good properties to ascorbic acid detection with the linear range of 10 μM to 0.20 mM, the detection limit of 3 μM (S/N = 3). The sensitivity is 1747.71 μA mM−1 cm−2, which is due to the hollow Ni(OH)2 with low crystallinity.

PdPt bimetallic alloy nanowires-based electrochemical sensor for sensitive detection of ascorbic acid

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42008-42013 ◽  
Author(s):  
Lihua Jin ◽  
Zaihua Zhang ◽  
Zhihua Zhuang ◽  
Zheng Meng ◽  
Cong Li ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Detection Limit ◽  
Electrochemical Sensor ◽  
Electrocatalytic Activity ◽  
Linear Range ◽  
Sensitive Detection ◽  
Wide Linear Range ◽  
Bimetallic Alloy ◽  
Alloy Nanowires

A novel PdPt bimetallic alloy nanowires-based electrochemical sensor for sensitive detection of ascorbic acid with remarkable electrocatalytic activity in a wide linear range (0.01–0.97 mM) and a detection limit as low as 0.2 μM.

Synthesis of Ag–Cu alloy nanosheets for ascorbic acid detection

2021 ◽  
Vol 11 (6) ◽  
pp. 1001-1006
Author(s):  
Lijun Kong ◽  
Jiahao Chen ◽  
Zehui Peng ◽  
Jiawei Zhang ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
High Sensitivity ◽  
Soft Template ◽  
Ascorbic Acid Concentration ◽  
Detection Range ◽  
Optical Absorbance ◽  
Cu Alloy ◽  
Enzyme Method ◽  
Ascorbic Acid Detection ◽  
Excellent Stability

Metal alloy nanosheets play a very important role as catalysts, which also show obvious advantages in the field of biosensor. Compared with traditional methods, such as enzyme method, gas chromatography or optical absorbance, the detection of ascorbic acid is simpler and more stable by spectroscopy. Ag–Cu alloy nanosheets with a thickness of about 1–3 nm and an average lateral size of 3–5 nm were synthesized in this study by the soft template method. These nanosheets were used to construct a sensor for measuring the concentration of ascorbic acid. The initial UV-Vis absorption peaks for the Ag–Cu alloy nanosheets in aqueous solution were effectively quenched upon addition of ascorbic acid. As the ascorbic acid concentration was in the range of 5–250 mmol/L changes, the UV absorbance intensity for the sensor also changed. Because of its wide detection range, high sensitivity, and excellent stability, the Ag–Cu alloy sensor method may be an excellent alternative to the traditional ascorbic acid measure method.

A MoN nanosheet array supported on carbon cloth as an efficient electrochemical sensor for nitrite detection

The Analyst ◽  
2019 ◽  
Vol 144 (18) ◽  
pp. 5378-5380 ◽  
Author(s):  
Rongrong Cao ◽  
Hong Huang ◽  
Jie Liang ◽  
Ting Wang ◽  
Yonglan Luo ◽  
...  
Keyword(s):  
Detection Limit ◽  
Electrochemical Sensor ◽  
High Sensitivity ◽  
Linear Range ◽  
Carbon Cloth ◽  
Efficient Catalyst ◽  
Term Stability ◽  
Long Term Stability ◽  
Nanosheet Array

MoN nanosheet array acts as an efficient catalyst for nitrite sensing, with a linear range from 1 μA to 5 mM, a detection limit of 3 nM (S/N = 3), a high sensitivity of 4319 μA mM−1 cm−2 and long-term stability and reproducibility.

A self-supported electrochemical sensor for simultaneous sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers

2017 ◽  
Vol 9 (48) ◽  
pp. 6801-6807 ◽  
Author(s):  
SongGe Zhang ◽  
Han Zhu ◽  
PiMing Ma ◽  
Fang Duan ◽  
WeiFu Dong ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Carbon Nanofibers ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Alloy Carbon

The key issue in efficient electrochemical detection of trace heavy metal ions (HMIs) is to design hierarchical nanostructure electrodes with high sensitivity and low detection limit.

Preparation and Electrocatalysis of Multi-Walled Carbon Nanotube Electrode

2013 ◽  
Vol 807-809 ◽  
pp. 2713-2717
Author(s):  
Jia Yue Chen
Keyword(s):  
Ascorbic Acid ◽  
Carbon Nanotube ◽  
Detection Limit ◽  
Electrochemical Behavior ◽  
Preparation Method ◽  
Linear Range ◽  
Ito Electrode ◽  
Multi Walled Carbon Nanotube ◽  
Naoh Treatment ◽  
Self Assembled

This paper studied the preparation method of the multi-walled carbon ITO nanotubes electrode, which was prepared by ITO electrode self-assembled after adsorbing n-Dodecanethiol.The multi-walled carbon ITO nanotubes electrode was prepared by self-assembled after adsorbed n-Dodecanethiol.The electrode was characterized with DA as the representative. The effects on electrochemical behavior of NaOH treatment and pH were discussed. The results showed that after NaOH treatment increased the electrocatalysis to DA. The electrode was used for detection of DA in the 1×10-5 mol/L ascorbic acid (AA) in the presence DA. The linear range was 1×10-8~1.5×10-7 mol/L, the detection limit was 5.0×10-9 mol/L. It could effectively removed the disturb of AA.

Preyssler-type polyoxometalate-based crystalline materials for the electrochemical detection of H2O2

CrystEngComm ◽  
2021 ◽  
Author(s):  
HaoTian Zhu ◽  
WenSi Tang ◽  
YuanYuan Ma ◽  
YongHui Wang ◽  
HuaQiao Tan ◽  
...  
Keyword(s):  
Detection Limit ◽  
Electrochemical Detection ◽  
Hybrid Materials ◽  
Electrochemical Sensors ◽  
High Sensitivity ◽  
Inorganic Hybrid ◽  
Crystalline Materials ◽  
Low Detection Limit

Four Preyssler-type polyoxometalate-based organic–inorganic hybrid materials were synthesized as non-enzymatic H2O2 electrochemical sensors, with high sensitivity and low detection limit.

scholarly journals Development of a Method for a Sensitive Simultaneous Determination of Dopamine and Paracetamol in Biological Samples and Pharmaceutical Preparations

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Ali Babaei ◽  
Aliyeh Dehdashti ◽  
Mohammad Afrasiabi
Keyword(s):  
Detection Limit ◽  
Modified Electrode ◽  
Pharmaceutical Preparation ◽  
Pharmaceutical Preparations ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Linear Range ◽  
Multiwalled Carbon ◽  
Excellent Stability

A chemically modified electrode is constructed based on multiwalled carbon nanotube—modified glassy carbon electrode (MWCNTs/GCE). The measurements were carried out by application of differential pulse voltammetry (DPV), cyclic voltammetry (CV), and chronoamperometry (CA) methods. Application of DPV method showed wide linear range of DA from 1 μM to 540 μM and a detection limit of 0.098 μM (S/N=3). The linear range of PAR of 3 μM to 300 μM and a detection limit of 0.15 μM, were obtained. The modified electrode showed electrochemical responses with high sensitivity, high selectivity, and excellent stability for DA and PAR determination at optimal conditions, which makes it a suitable sensor for simultaneous submicromolar detection of DA and PAR in solutions. The analytical performance of this sensor has been evaluated for detection of DA and PAR in human serum, human urine, and pharmaceutical preparation with satisfactory results.

scholarly journals Electrochemical Detection of Dopamine at a Gold Electrode Modified with a Polypyrrole–Mesoporous Silica Molecular Sieves (MCM-48) Film

2018 ◽  
Vol 20 (1) ◽  
pp. 111 ◽  
Author(s):  
Izabela Zablocka ◽  
Monika Wysocka-Zolopa ◽  
Krzysztof Winkler
Keyword(s):  
Ascorbic Acid ◽  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Modified Electrode ◽  
Electrochemical Detection ◽  
Molecular Sieves ◽  
Gold Electrode ◽  
Square Wave Voltammetry ◽  
Wave Voltammetry

A gold electrode modified with a polypyrrole–mesoporous silica molecular sieves (polypyrrole—MCM-48) nanostructure film was used for the electrochemical determination of small concentrations of dopamine (DA) by cyclic voltammetry and square-wave voltammetry techniques. This electrode showed good electrocatalytic activity for the oxidation of dopamine. The oxidation potential of dopamine was decreased significantly compared with that obtained at the bare gold electrode. The observed linear range for the determination of the dopamine concentration, without interferents through cyclic voltammetry measurements, was from 10 μM to 1.2 mM (R2 = 0.9989) for the gold electrode modified with the polypyrrole—MCM-48 nanostructure, with a detection limit of 2.5 μM. In the case of square-wave voltammetry, the linear range was 2–250 μM, with a correlation coefficient of 0.9996, and the detection limit was estimated to be 0.7 μM. The effects of interferents, such as ascorbic acid (AA) and uric acid (UA), on the electrochemical detection of dopamine were also examined. The modified electrode can successfully separate the oxidation potentials for ascorbic acid and dopamine, shifting the oxidation peak potential of ascorbic acid to a more positive potential, and significantly decreasing the peak current. The presence of ascorbic acid increased the sensitivity of dopamine determination at the modified electrode, and the detection limit was estimated to be 0.5 μM with 0.1 mM ascorbic acid to imitate physiological solutions. Additionally, studies showed that the presence of uric acid does not affect the electrochemical detection of dopamine. The modified electrode can be successfully applied for the quantitative analysis of dopamine both with and without interferents.

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