Supramolecular fabrication of multilevel graphene-based gas sensors with high NO2 sensibility

Nanoscale ◽  
2015 ◽  
Vol 7 (22) ◽  
pp. 10259-10266 ◽  
Author(s):  
Zhuo Chen ◽  
Ahmad Umar ◽  
Shiwei Wang ◽  
Yao Wang ◽  
Tong Tian ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Silver Nanoparticle ◽  
Gas Sensors ◽  
Supramolecular Assembly ◽  
Sulphonic Acid ◽  
Reduced Graphene ◽  
Highly Sensitive

This work reports the supramolecular assembly of a silver nanoparticle-naphthalene-1-sulphonic acid-reduced graphene oxide (Ag-NA-rGO) composite and its utilization to fabricate a highly sensitive and selective gas sensor.

Reduced graphene oxide-CuFe2O4 nanocomposite: A highly sensitive room temperature NH3 gas sensor

2018 ◽  
Vol 272 ◽  
pp. 100-109 ◽  
Author(s):  
L. Satish K. Achary ◽  
Aniket Kumar ◽  
Bapun Barik ◽  
Pratap S. Nayak ◽  
Nilakantha Tripathy ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Reduced Graphene ◽  
Highly Sensitive

Dielectrophoretic assembly of Pt nanoparticle-reduced graphene oxide nanohybrid for highly-sensitive multiple gas sensor

2015 ◽  
Vol 220 ◽  
pp. 755-761 ◽  
Author(s):  
Jianwei Wang ◽  
Servin Rathi ◽  
Budhi Singh ◽  
Inyeal Lee ◽  
Sunglyul Maeng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Pt Nanoparticle ◽  
Reduced Graphene ◽  
Highly Sensitive

scholarly journals Flexible Low-Temperature Ammonia Gas Sensor Based on Reduced Graphene Oxide and Molybdenum Disulfide

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 345
Author(s):  
Zhe Ren ◽  
Yunbo Shi ◽  
Tianming Song ◽  
Tian Wang ◽  
Bolun Tang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Recovery Time ◽  
Detection Range ◽  
Working Temperature ◽  
Response Recovery ◽  
Reduced Graphene

Owing to harsh working environments and complex industrial requirements, traditional gas sensors are prone to deformation damage, possess a limited detection range, require a high working temperature, and display low reliability, thereby necessitating the development of flexible and low-temperature gas sensors. In this study, we developed a low-temperature polyimide (PI)-based flexible gas sensor comprising a reduced graphene oxide (rGO)/MoS2 composite. The micro-electro-mechanical system technology was used to fabricate Au electrodes on a flexible PI sheet to form a “sandwiched” sensor structure. The rGO/MoS2 composites were synthesized via a one-step hydrothermal method. The gas-sensing response was the highest for the composite comprising 10% rGO. The structure of this material was characterized, and a PI-based flexible gas sensor comprising rGO/MoS2 was fabricated. The optimal working temperature of the sensor was 141 °C, and its response-recovery time was significantly short upon exposure to 50–1500 ppm NH3. Thus, this sensor exhibited high selectivity and a wide NH3 detection range. Furthermore, it possessed the advantages of low power consumption, a short response-recovery time, a low working temperature, flexibility, and variability. Our findings provide a new framework for the development of pollutant sensors that can be utilized in an industrial environment.

scholarly journals A high-sensitive room temperature gas sensor based on cobalt phthalocyanines and reduced graphene oxide nanohybrids for the ppb-levels of ammonia detection

RSC Advances ◽  
2019 ◽  
Vol 9 (64) ◽  
pp. 37518-37525 ◽  
Author(s):  
ZhiJiang Guo ◽  
Bin Wang ◽  
Xiaolin Wang ◽  
Yong Li ◽  
Shijie Gai ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Environmental Pollution ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Pollution Monitoring ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Ammonia Detection

Highly sensitive gas sensing materials are of great importance for environmental pollution monitoring.

A 3D scaffold for ultra-sensitive reduced graphene oxide gas sensors

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6511-6514 ◽  
Author(s):  
Yong Ju Yun ◽  
Won G. Hong ◽  
Nak-Jin Choi ◽  
Hyung Ju Park ◽  
Seung Eon Moon ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Preparation Method ◽  
3D Scaffold ◽  
Reduced Graphene ◽  
Facile Preparation

Ultra-sensitive RGO gas sensors with a facile preparation method are presented. The gas sensor composed of RGO nanofibers showed excellent sensitivity to NO2gas.

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.

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