scholarly journals Bismuth Nanoclusters/Porous Carbon Composite: A Facile Ratiometric Electrochemical Sensing Platform for Pb2+ Detection with High Sensitivity and Selectivity

ACS Omega ◽  
2021 ◽  
Author(s):  
Jin Zou ◽  
Qi Yu ◽  
Yansha Gao ◽  
Shangxing Chen ◽  
Xigen Huang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Sensitivity ◽  
Carbon Composite ◽  
Electrochemical Sensing ◽  
Sensing Platform ◽  
Sensitivity And Selectivity

Core-shell Cu@C@ZIF-8 composite: a high-performance electrode material for electrochemical sensing of nitrite with high selectivity and sensitivity

2021 ◽  
Author(s):  
Feng Gao ◽  
Xiaolong Tu ◽  
Yongfang Yu ◽  
Yansha Gao ◽  
Jin Zou ◽  
...  
Keyword(s):  
High Performance ◽  
High Selectivity ◽  
Limit Of Detection ◽  
Metal Organic Framework ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Core Shell ◽  
Zeolitic Imidazolate Framework ◽  
Sensing Platform ◽  
The Difference

Abstract Herein, an efficient electrochemical sensing platform is proposed for selective and sensitive detection of nitrite on the basis of Cu@C@Zeolitic imidazolate framework-8 (Cu@C@ZIF-8) heterostructure. Core-shell Cu@C@ZIF-8 composite was synthesized by pyrolysis of Cu-metal-organic framework@ZIF-8 (Cu-MOF@ZIF-8) in Ar atmosphere on account of the difference of thermal stability between Cu-MOF and ZIF-8. For the sensing system of Cu@C@ZIF-8, ZIF-8 with proper pore size allows nitrite diffuse through the shell, while big molecules cannot, which ensures high selectivity of the sensor. On the other hand, Cu@C as electrocatalyst promotes the oxidation of nitrite, thereby resulting high sensitivity of the sensor. Accordingly, the Cu@C@ZIF-8 based sensor presents excellent performance for nitrite detection, which achieves a wide linear response range of 0.1 µM to 300.0 µM, and a low limit of detection (LOD) of 0.033 µM. In addition, the Cu@C@ZIF-8 sensor possesses excellent stability and reproducibility, and was employed to quantify nitrite in sausage samples with recoveries of 95.45-104.80%.

scholarly journals An Efficient Electrochemical Sensor Driven by Hierarchical Hetero-Nanostructures Consisting of RuO2 Nanorods on WO3 Nanofibers for Detecting Biologically Relevant Molecules

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3295 ◽  
Author(s):  
Hyerim Lee ◽  
Yeomin Kim ◽  
Areum Yu ◽  
Dasol Jin ◽  
Ara Jo ◽  
...  
Keyword(s):  
Tungsten Trioxide ◽  
High Surface ◽  
High Surface Area ◽  
High Sensitivity ◽  
Annealing Process ◽  
Electrochemical Sensing ◽  
Biologically Relevant ◽  
Sensing Platform ◽  
Thermal Annealing Process ◽  
Biologically Relevant Molecules

By means of electrospinning with the thermal annealing process, we investigate a highly efficient sensing platform driven by a hierarchical hetero-nanostructure for the sensitive detection of biologically relevant molecules, consisting of single crystalline ruthenium dioxide nanorods (RuO2 NRs) directly grown on the surface of electrospun tungsten trioxide nanofibers (WO3 NFs). Electrochemical measurements reveal the enhanced electron transfer kinetics at the prepared RuO2 NRs-WO3 NFs hetero-nanostructures due to the incorporation of conductive RuO2 NRs nanostructures with a high surface area, resulting in improved relevant electrochemical sensing performances for detecting H2O2 and L-ascorbic acid with high sensitivity.

Prussian blue-carboxylated MWCNTs/ZIF-67 composite: a new electrochemical sensing platform for paracetamol detection with high sensitivity

2020 ◽  
Vol 32 (8) ◽  
pp. 085501
Author(s):  
Feng Gao ◽  
Jin Zou ◽  
Wei Zhong ◽  
Xiaolong Tu ◽  
Xigen Huang ◽  
...  
Keyword(s):  
Prussian Blue ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Sensing Platform

High-performance electrochemical sensing platform based on sodium alginate-derived 3D hierarchically porous carbon for simultaneous determination of dihydroxybenzene isomers

2021 ◽  
Author(s):  
Liang Wei ◽  
Xinlong Huang ◽  
Xianqian Zhang ◽  
Xiande Yang ◽  
Jing Yang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Porous Carbon ◽  
High Performance ◽  
Three Dimensional ◽  
Electrochemical Sensing ◽  
Dihydroxybenzene Isomers ◽  
Hierarchically Porous ◽  
Sensing Platform

A selective and sensitive electrochemical sensor based on three-dimensional hierarchically porous carbon was developed for simultaneous determination of dihydroxybenzene isomers.

Porous Carbon Modified Electrode as a Highly-sensitive Electrochemical Sensing Platform for Salvianolic Acid B

2015 ◽  
Vol 28 (1) ◽  
pp. 235-242
Author(s):  
Qin Cheng ◽  
Miao Zhang ◽  
Wensheng Huang ◽  
Piaopiao Wei ◽  
Kangbing Wu
Keyword(s):  
Modified Electrode ◽  
Porous Carbon ◽  
Salvianolic Acid B ◽  
Electrochemical Sensing ◽  
Salvianolic Acid ◽  
Sensing Platform ◽  
Highly Sensitive

High-sensitivity paracetamol sensor based on Pd/graphene oxide nanocomposite as an enhanced electrochemical sensing platform

2014 ◽  
Vol 54 ◽  
pp. 468-475 ◽  
Author(s):  
Junhua Li ◽  
Jinlong Liu ◽  
Gongrong Tan ◽  
Jianbo Jiang ◽  
Sanjun Peng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Sensitivity ◽  
Electrochemical Sensing ◽  
Sensing Platform

A Simple and Sensitive Colorimetric Detection of Silver Ions Based on Cationic Polymer-Directed AuNPs Aggregation

2013 ◽  
Vol 66 (1) ◽  
pp. 113 ◽  
Author(s):  
Faze Wang ◽  
Yuangen Wu ◽  
Shenshan Zhan ◽  
Lan He ◽  
Wenting Zhi ◽  
...  
Keyword(s):  
Metal Ions ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Silver Ions ◽  
Cationic Polymer ◽  
Charge Balance ◽  
Remarkable Change ◽  
Sensing Platform ◽  
Sensitivity And Selectivity ◽  
Positively Charged

This paper describes a simple and sensitive colorimetric sensor employing single-stranded DNA (ssDNA) ligand, cationic polymer, and gold nanoparticles (AuNPs) to detect silver ions. The positively charged polymer can electrostatically interact with ssDNA and destroy the charge balance leading to induction of AuNP aggregation. Silver ions (Ag+) can bind to cytosine (C)-rich nucleic acids to form the C-Ag+-C hair-pin structure, which can prevent its interaction with polymers. The resulting cationic polymer could aggregate AuNPs causing a remarkable change in colour. The concentration of Ag+ can be determined visually. This sensing platform exhibits high sensitivity and selectivity towards Ag+ versus other metal ions, with a detection limit of 48.6 nM. The assay did not require any labelling or modifying steps. This method is simple, effective, and convenient and can in principle be used to detect other metal ions or small molecules.

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