scholarly journals Porous reduced graphene oxide (rGO)/WO3 nanocomposites for the enhanced detection of NH3 at room temperature

2019 ◽  
Vol 1 (5) ◽  
pp. 1799-1811 ◽  
Author(s):  
G. Jeevitha ◽  
R. Abhinayaa ◽  
D. Mangalaraj ◽  
N. Ponpandian ◽  
P. Meena ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pore Size ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reduced Graphene ◽  
Gas Sensing Properties ◽  
Semiconducting Metal Oxide

Incorporation of reduced graphene oxide (rGO) modifies the properties of semiconducting metal oxide nanoparticles and makes it possible to tune the surface area and pore size to optimum values, which in turn improves their gas sensing properties.

The influence of oxygen functional groups on gas-sensing properties of reduced graphene oxide (rGO) at room temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52339-52346 ◽  
Author(s):  
X. Wang ◽  
X. Li ◽  
Y. Zhao ◽  
Y. Chen ◽  
J. Yu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Functional Groups ◽  
Room Temperature ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Oxygen Functional Groups ◽  
Reduced Graphene ◽  
Gas Sensing Properties

Three methods were used to prepare reduced graphene oxide (rGO) with various ratios of oxygen functional groups, such as –OOH, –OH and CO, to study their effects on the NO2 sensing properties at room temperature.

Reduced graphene oxide anchored with zinc oxide nanoparticles with enhanced photocatalytic activity and gas sensing properties

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60253-60259 ◽  
Author(s):  
Jianjiang He ◽  
Chunge Niu ◽  
Chao Yang ◽  
Jide Wang ◽  
Xintai Su
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Gas Sensing ◽  
Oxide Nanoparticles ◽  
Reduced Graphene ◽  
Gas Sensing Properties ◽  
Calcination Method

Reduced graphene oxide (rGO)–zinc oxide (ZnO) composites were synthesized by a two-step hydrolysis–calcination method, using GO and Zn(Ac)2 as precursors.

scholarly journals Reduced graphene oxide and inorganic nanoparticles composites – synthesis and characterization

2015 ◽  
Vol 17 (4) ◽  
pp. 95-103 ◽  
Author(s):  
Magdalena Onyszko ◽  
Karolina Urbas ◽  
Malgorzata Aleksandrzak ◽  
Ewa Mijowska
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Zirconium Dioxide ◽  
Water Solution ◽  
Metal Oxide Nanoparticles ◽  
Direct Synthesis ◽  
Inorganic Nanoparticles ◽  
Oxide Nanoparticles ◽  
Reduced Graphene

Abstract Graphene – novel 2D material, which possesses variety of fascinating properties, can be considered as a convenient support material for the nanoparticles. In this work various methods of synthesis of reduced graphene oxide with metal or metal oxide nanoparticles will be presented. The hydrothermal approach for deposition of platinum, palladium and zirconium dioxide nanoparticles in ethylene glycol/water solution was applied. Here, platinum/reduced graphene oxide (Pt/RGO), palladium/reduced graphene oxide (Pd/RGO) and zirconium dioxide/reduced graphene oxide (ZrO2/RGO) nanocomposites were prepared. Additionally, manganese dioxide/reduced graphene oxide nanocomposite (MnO2/RGO) was synthesized in an oleic-water interface. The obtained nanocomposites were investigated by transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), Raman spectroscopy and thermogravimetric analysis (TGA). The results shows that GO can be successfully used as a template for direct synthesis of metal or metal oxide nanoparticles on its surface with a homogenous distribution.

Study on gas sensing of reduced graphene oxide/ZnO thin film at room temperature

2017 ◽  
Vol 240 ◽  
pp. 870-880 ◽  
Author(s):  
Yong Zhou ◽  
Xiaogang Lin ◽  
Yang Wang ◽  
Guoqing Liu ◽  
Xiangyi Zhu ◽  
...  
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Zno Thin Film ◽  
Reduced Graphene

scholarly journals Simple Synthesis of Cobalt Carbonate Hydroxide Hydrate and Reduced Graphene Oxide Hybrid Structure for High-Performance Room Temperature NH3 Sensor

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 615 ◽  
Author(s):  
Chang Wang ◽  
Huan Wang ◽  
Dan Zhao ◽  
Xianqi Wei ◽  
Xin Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Hybrid Structure ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Reduced Graphene ◽  
Hydroxide Hydrate

A novel hybrid structure sensor based on cobalt carbonate hydroxide hydrate (CCHH) and reduced graphene oxide (RGO) was designed for room temperature NH3 detection. This hybrid structure consisted of CCHH and RGO (synthesized by a one-step hydrothermal method), in which RGO uniformly dispersed in CCHH, being used as the gas sensing film. The resistivity of the hybrid structure was highly sensitive to the changes on NH3 concentration. CCHH in the hybrid structure was the sensing material and RGO was the conductive channel material. The hybrid structure could improve signal-to-noise ratio (SNR) and the sensitivity by obtaining the optimal mass proportion of RGO, since the proportion of RGO was directly related to sensitivity. The gas sensor with 0.4 wt% RGO showed the highest gas sensing response reach to 9% to 1 ppm NH3. Compared to a conventional gas sensor, the proposed sensor not only showed high gas sensing response at room temperature but also was easy to achieve large-scale production due to the good stability and simple synthesis process.

scholarly journals Ammonia Gas Detection by Tannic Acid Functionalized and Reduced Graphene Oxide at Room Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Sweejiang Yoo ◽  
Xin Li ◽  
Yuan Wu ◽  
Weihua Liu ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Tannic Acid ◽  
Room Temperature ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Gas Detection ◽  
Ammonia Gas ◽  
Reduced Graphene

Reduced graphene oxide (rGO) based chemiresistor gas sensor has received much attention in gas sensing for high sensitivity, room temperature operation, and reversible. Here, for the first time, we present a promising chemiresistor for ammonia gas detection based on tannic acid (TA) functionalized and reduced graphene oxide (rGOTA functionalized). Green reductant of TA plays a major role in both reducing process and enhancing the gas sensing properties ofrGOTA functionalized. Our results showrGOTA functionalizedonly selective to ammonia with excellent respond, recovery, respond time, and recovery times.rGOTA functionalizedelectrical resistance decreases upon exposure to NH3where we postulated that it is due to n-doping by TA and charge transfer betweenrGOTA functionalizedand NH3through hydrogen bonding. Furthermore,rGOTA functionalizedhinders the needs for stimulus for both recovery and respond. The combination of greener sensing material and simplicity in overall sensor design provides a new sight for green reductant approach of rGO based chemiresistor gas sensor.

Tuning gas-sensing properties of reduced graphene oxide using tin oxide nanocrystals

2012 ◽  
Vol 22 (22) ◽  
pp. 11009 ◽  
Author(s):  
Shun Mao ◽  
Shumao Cui ◽  
Ganhua Lu ◽  
Kehan Yu ◽  
Zhenhai Wen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Reduced Graphene ◽  
Gas Sensing Properties
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