Determination of catechol based on gold/Ni(OH)2 nanocomposites supported on reduced graphene oxide via a one-step wet-chemical method

2017 ◽  
Vol 9 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Huijuan Wang ◽  
Jianhang Qu ◽  
Yong Wang ◽  
Shufang Li ◽  
Jianying Qu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Reduced Graphene ◽  
One Step ◽  
Wet Chemical ◽  
Xrd Techniques

Here, gold/Ni(OH)2 nanocomposites supported on reduced graphene oxide (Au/Ni(OH)2/rGO) were synthesized by a one-step wet-chemical method, which were characterized by TEM, IR, SEM, XPS and XRD techniques.

A one-step electrochemically reduced graphene oxide based sensor for sensitive voltammetric determination of furfural in milk products

2021 ◽  
Vol 13 (1) ◽  
pp. 56-63
Author(s):  
Qiuqiu Wang ◽  
Juanhua Zhang ◽  
Yanbo Xu ◽  
Yingyi Wang ◽  
Liang Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Surface ◽  
High Surface Area ◽  
Milk Products ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
One Step ◽  
Dairy Milk

One-step electrochemically reduced graphene oxide with high surface area and improved electron transfer kinetics shows great performances in the determination of furfural in dairy milk.

scholarly journals A Laser Reduced Graphene Oxide Grid Electrode for the Voltammetric Determination of Carbaryl

2021 ◽  
Author(s):  
Muhammad Saqib ◽  
Elena V. Dorozhko ◽  
Jiri Barek ◽  
Vlastimil Vyskocil ◽  
Elena Korotkova ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Fruit Juices ◽  
Grid Electrode ◽  
Oxidation Current ◽  
Reduced Graphene ◽  
Electrochemically Active ◽  
One Step ◽  
Ph Range

Laser reduced graphene oxide (LRGO) on a PET substrate was prepared in one-step to obtain the LRGO grid electrode for sensitive carbaryl determination. The grid form results in a grid distribution of different electrochemically active zones affecting the electroactive substance diffusion towards to the electrode surface and increasing the electrochemical sensitivity for carbaryl determination. Carbaryl is electrochemically irreversibly oxidized by the secondary amine moiety of the molecule with the loss of one proton and one electron in the pH range from 5 to 7 by LSV on the LRGO grid electrode with a scan rate of 300 mV/s. Some interference of the juice matrix molecules did not significantly affect the LSV oxidation current of carbaryl on the LRGO grid electrode after adsorptive accumulation without applied potential. The LRGO grid electrode can be used for LSV determination of carbaryl in fruit juices in the concentration range from 0.25 to 128 mg/L with LOD of 0.1 mg/L by. The fabrication of the LRGO grid electrode opens up possibilities for further inexpensive monitoring of carbaryl in other fruit juices and fruits.

scholarly journals A Laser Reduced Graphene Oxide Grid Electrode for the Voltammetric Determination of Carbaryl

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5050
Author(s):  
Muhammad Saqib ◽  
Elena V. Dorozhko ◽  
Jiri Barek ◽  
Vlastimil Vyskocil ◽  
Elena I. Korotkova ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Fruit Juices ◽  
Grid Electrode ◽  
Oxidation Current ◽  
Reduced Graphene ◽  
Electrochemically Active ◽  
One Step ◽  
Ph Range

Laser-reduced graphene oxide (LRGO) on a polyethylene terephthalate (PET) substrate was prepared in one step to obtain the LRGO grid electrode for sensitive carbaryl determination. The grid form results in a grid distribution of different electrochemically active zones affecting the electroactive substance diffusion towards the electrode surface and increasing the electrochemical sensitivity for carbaryl determination. Carbaryl is electrochemically irreversibly oxidized at the secondary amine moiety of the molecule with the loss of one proton and one electron in the pH range from 5 to 7 by linear scan voltammetry (LSV) on the LRGO grid electrode with a scan rate of 300 mV/s. Some interference of the juice matrix molecules does not significantly affect the LSV oxidation current of carbaryl on the LRGO grid electrode after adsorptive accumulation without applied potential. The LRGO grid electrode can be used for LSV determination of carbaryl in fruit juices in the concentration range from 0.25 to 128 mg/L with LOD of 0.1 mg/L. The fabrication of the LRGO grid electrode opens up possibilities for further inexpensive monitoring of carbaryl in other fruit juices and fruits

One-Step Fabrication of Electrochemical Reduced Graphene Oxide-Carboxyl Functionalized Multiwalled Carbon Nanotubes Film and Its Use as a Platform for Determination of Clopidogrel Bisulfate

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050130
Author(s):  
Na Wang ◽  
Die Gao ◽  
Yaxin Ding ◽  
Lijie Wang ◽  
Fei Wang
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nanocomposite Film ◽  
Accessible Surface Area ◽  
Electron Microscopic ◽  
Multiwalled Carbon ◽  
Reduced Graphene ◽  
One Step

In this work, one-step fabrication of electrochemical reduced graphene oxide-carboxyl functionalized multi-walled carbon nanotubes (ErGO-[Formula: see text]MWCNTs) was successfully presented using potentiostatic method (PM). Characteristics of nanocomposite film were studied by using scanning electron microscopic (SEM) and electrochemical experiments. Furthermore, nanocomposite film of ErGO-[Formula: see text]MWCNTs was presented to develop a sensitive voltammetric sensor for detection of clopidogrel bisulphate (CLP). Electrochemical tests showed that nanocomposite film of ErGO-[Formula: see text]MWCNTs modified electrode can effectively increase currents to the oxidation of CLP due to the large accessible surface area as well as its excellent conductivity. Under optimum conditions, response peak currents were linear related to CLP in the range of [Formula: see text] to [Formula: see text] with a lower detection limits of [Formula: see text] ([Formula: see text]). Moreover, the proposed method exhibited an excellent selectivity, stability, reproducibility and was applied successfully for determination of CLP content in tablet dosage form with acceptable recovery values.

One step synthesis cadmium sulphide/reduced graphene oxide sandwiched film modified electrode for simultaneous electrochemical determination of hydroquinone, catechol and resorcinol

RSC Advances ◽  
2015 ◽  
Vol 5 (24) ◽  
pp. 18615-18621 ◽  
Author(s):  
Shirong Hu ◽  
Wuxiang Zhang ◽  
Jianzhong Zheng ◽  
Jiangu Shi ◽  
Zhongqiu Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Modified Electrodes ◽  
Cadmium Sulphide ◽  
Electrochemical Determination ◽  
Reduced Graphene ◽  
One Step

In this work, a novel sandwiched film of cadmium sulphide/reduced graphene oxide (CdS/r-GO) was synthesized and the modified electrodes were successfully used to simultaneously determine hydroquinone (HQ), catechol (CC) and resorcinol (RC).

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