Preparation of zinc oxide nanoparticle–reduced graphene oxide–gold nanoparticle hybrids for detection of NO2

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91760-91765 ◽  
Author(s):  
Sen Liu ◽  
Ziying Wang ◽  
Yong Zhang ◽  
Zhuo Dong ◽  
Tong Zhang
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Gold Nanoparticle ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Zinc Oxide Nanoparticle ◽  
Reduced Graphene ◽  
Oxide Nanoparticle

A novel NO2 gas sensor bas been fabricated using ZnO–rGO–Au hybrids as sensing materials, which exhibit excellent sensing performances operated at 80 °C.

Label-free electrochemical immunosensor based on gold nanoparticle/polyethyleneimine/reduced graphene oxide nanocomposite for the ultrasensitive detection of cancer biomarker matrix metalloproteinase-1

The Analyst ◽  
2021 ◽  
Author(s):  
Xinke Liu ◽  
Lu-Yin Lin ◽  
Fu-Yen Tseng ◽  
Yu-Cheng Tan ◽  
Jian Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Matrix Metalloproteinase ◽  
Gold Nanoparticle ◽  
Reduced Graphene Oxide ◽  
Electrochemical Immunosensor ◽  
Ultrasensitive Detection ◽  
Label Free ◽  
Matrix Metalloproteinase 1 ◽  
Reduced Graphene ◽  
P Matrix

Matrix metalloproteinase-1 (MMP-1) is associated with many types of cancers, including oral, colorectal, and brain cancers. This paper describes the fabrication of an MMP-1 immunosensor based on a gold nanoparticle/polyethyleneimine/reduced...

scholarly journals Functionalized Reduced Graphene Oxide Thin Films for Ultrahigh CO2 Gas Sensing Performance at Room Temperature

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 623
Author(s):  
Monika Gupta ◽  
Huzein Fahmi Hawari ◽  
Pradeep Kumar ◽  
Zainal Arif Burhanudin ◽  
Nelson Tansu
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Functional Groups ◽  
Recovery Time ◽  
Room Temperature ◽  
Co2 Gas ◽  
Reduced Graphene ◽  
Response And Recovery

The demand for carbon dioxide (CO2) gas detection is increasing nowadays. However, its fast detection at room temperature (RT) is a major challenge. Graphene is found to be the most promising sensing material for RT detection, owing to its high surface area and electrical conductivity. In this work, we report a highly edge functionalized chemically synthesized reduced graphene oxide (rGO) thin films to achieve fast sensing response for CO2 gas at room temperature. The high amount of edge functional groups is prominent for the sorption of CO2 molecules. Initially, rGO is synthesized by reduction of GO using ascorbic acid (AA) as a reducing agent. Three different concentrations of rGO are prepared using three AA concentrations (25, 50, and 100 mg) to optimize the material properties such as functional groups and conductivity. Thin films of three different AA reduced rGO suspensions (AArGO25, AArGO50, AArGO100) are developed and later analyzed using standard FTIR, XRD, Raman, XPS, TEM, SEM, and four-point probe measurement techniques. We find that the highest edge functionality is achieved by the AArGO25 sample with a conductivity of ~1389 S/cm. The functionalized AArGO25 gas sensor shows recordable high sensing properties (response and recovery time) with good repeatability for CO2 at room temperature at 500 ppm and 50 ppm. Short response and recovery time of ~26 s and ~10 s, respectively, are achieved for 500 ppm CO2 gas with the sensitivity of ~50 Hz/µg. We believe that a highly functionalized AArGO CO2 gas sensor could be applicable for enhanced oil recovery, industrial and domestic safety applications.

scholarly journals Plasmonic photocatalysis: complete degradation of bisphenol A by a gold nanoparticle–reduced graphene oxide composite under visible light

2018 ◽  
Vol 17 (5) ◽  
pp. 628-637 ◽  
Author(s):  
Haydar Ali ◽  
Nikhil R. Jana
Keyword(s):  
Graphene Oxide ◽  
Bisphenol A ◽  
Visible Light ◽  
Gold Nanoparticle ◽  
Reduced Graphene Oxide ◽  
Contaminated Water ◽  
Food Environments ◽  
Oxide Composite ◽  
Complete Degradation ◽  
Reduced Graphene

A gold nanoparticle–graphene based composite has been developed for the degradation of bisphenol A under visible light and to detoxify contaminated water/food/environments.

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