scholarly journals Improving Ammonia Detecting Performance of Polyaniline Decorated rGO Composite Membrane with GO Doping

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2829
Author(s):  
Yubin Yuan ◽  
Haiyang Wu ◽  
Xiangrui Bu ◽  
Qiang Wu ◽  
Xuming Wang ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Gas Sensing ◽  
Response Process ◽  
Ammonia Gas ◽  
Adsorption Sites ◽  
Nh3 Adsorption ◽  
Doped Polyaniline ◽  
Ammonia Gas Sensors ◽  
Gas Response ◽  
Sensing Performance

Gas-sensing performance of graphene-based material has been investigated widely in recent years. Polyaniline (PANI) has been reported as an effective method to improve ammonia gas sensors’ response. A gas sensor based on a composite of rGO film and protic acid doped polyaniline (PA-PANI) with GO doping is reported in this work. GO mainly provides NH3 adsorption sites, and PA-PANI is responsible for charge transfer during the gas-sensing response process. The experimental results indicate that the NH3 gas response of rGO is enhanced significantly by decorating with PA-PANI. Moreover, a small amount of GO mixed with PA-PANI is beneficial to increase the gas response, which showed an improvement of 262.5% at 25 ppm comparing to no GO mixing in PA-PANI.

Metal-oxide based ammonia gas sensors: A review

2020 ◽  
Vol 10 ◽  
Author(s):  
Priya Gupta ◽  
Savita Maurya ◽  
Narendra Kumar Pandey ◽  
Vernica Verma
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Review Paper ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Ammonia Gas Sensors

: This review paper encompasses a study of metal-oxide and their composite based gas sensors used for the detection of ammonia (NH3) gas. Metal-oxide has come into view as an encouraging choice in the gas sensor industry. This review paper focuses on the ammonia sensing principle of the metal oxides. It also includes various approaches adopted for increasing the gas sensitivity of metal-oxide sensors. Increasing the sensitivity of the ammonia gas sensor includes size effects and doping by metal or other metal oxides which will change the microstructure and morphology of the metal oxides. Different parameters that affect the performances like sensitivity, stability, and selectivity of gas sensors are discussed in this paper. Performances of the most operated metal oxides with strengths and limitations in ammonia gas sensing application are reviewed. The challenges for the development of high sensitive and selective ammonia gas sensor are also discussed.

scholarly journals The effects of amino substituents on the enhanced ammonia sensing performance of PcCo/rGO hybrids

RSC Advances ◽  
2018 ◽  
Vol 8 (72) ◽  
pp. 41280-41287 ◽  
Author(s):  
Bin Wang ◽  
Xiaolin Wang ◽  
Xiaocheng Li ◽  
Zhijiang Guo ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Highly Sensitive ◽  
Cost Efficient ◽  
Ammonia Gas Sensors ◽  
Sensing Performance

Three new room temperature reversible ammonia gas sensors were fabricated using PcCo/rGO hybrids with cost-efficient, highly sensitive and stable sensing performance.

Development of low-cost ammonia gas sensors and data analysis algorithms to implement a monitoring grid of urban environmental pollutants

2012 ◽  
Vol 14 (6) ◽  
pp. 1565 ◽  
Author(s):  
Maria Chiesa ◽  
Federica Rigoni ◽  
Maria Paderno ◽  
Patrizia Borghetti ◽  
Giovanna Gagliotti ◽  
...  
Keyword(s):  
Data Analysis ◽  
Gas Sensors ◽  
Low Cost ◽  
Environmental Pollutants ◽  
Ammonia Gas ◽  
Ammonia Gas Sensors

scholarly journals Xerogels of Ammonium Polyvanadatomolybdate as Starting Material for Ammonia Gas Sensors

2015 ◽  
Vol 50 ◽  
pp. 71-79
Author(s):  
Vladimiras Bondarenka ◽  
R. Sereika ◽  
A. Mironas ◽  
S. Grebinskij
Keyword(s):  
Gas Sensors ◽  
Sol Gel ◽  
Soft Chemistry ◽  
Special Equipment ◽  
Ammonia Gas ◽  
Layer 4 ◽  
Ammonia Sensors ◽  
Sol Gel Synthesis ◽  
Ammonia Gas Sensors ◽  
Different Gases

The various gas sensors were designed for detection of different gases in the air using different oxides and impurities [1-3]. For example the manufacturing of ammonia sensors on the basis of CuxS-micro-porous-Si structure includes manufacture of micro-porous silicon, drawing on it of SiO2 isolating layer, and then the CuxS layer [4, 5]. The special equipment for all these processes is needed. More usable method for sensor production is so-called soft chemistry or sol–gel synthesis [6, 7].

CVD Grown Cuprous Oxide Thin Film Based High Performance Chemiresistive Ammonia Gas Sensors

2019 ◽  
Vol 19 (24) ◽  
pp. 11759-11766 ◽  
Author(s):  
Ravindra Kumar Jha ◽  
Vivek Singh ◽  
Jyoti Sinha ◽  
Sushobhan Avasthi ◽  
Navakanta Bhat
Keyword(s):  
Thin Film ◽  
Gas Sensors ◽  
Cuprous Oxide ◽  
High Performance ◽  
Oxide Thin Film ◽  
Ammonia Gas ◽  
Ammonia Gas Sensors

scholarly journals Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5910
Author(s):  
Andrea Gaiardo ◽  
Giulia Zonta ◽  
Sandro Gherardi ◽  
Cesare Malagù ◽  
Barbara Fabbri ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Gas Sensors ◽  
Process Development ◽  
Gas Sensing ◽  
Diagnostic Tools ◽  
Fecal Samples ◽  
Recovery Times ◽  
Medical Diagnostic ◽  
Response And Recovery ◽  
Sensing Performance

Among the various chemoresistive gas sensing properties studied so far, the sensing response reproducibility, i.e., the capability to reproduce a device with the same sensing performance, has been poorly investigated. However, the reproducibility of the gas sensing performance is of fundamental importance for the employment of these devices in on-field applications, and to demonstrate the reliability of the process development. This sensor property became crucial for the preparation of medical diagnostic tools, in which the use of specific chemoresistive gas sensors along with a dedicated algorithm can be used for screening diseases. In this work, the reproducibility of SmFeO3 perovskite-based gas sensors has been investigated. A set of four SmFeO3 devices, obtained from the same screen-printing deposition, have been tested in laboratory with both controlled concentrations of CO and biological fecal samples. The fecal samples tested were employed in the clinical validation protocol of a prototype for non-invasive colorectal cancer prescreening. Sensors showed a high reproducibility degree, with an error lower than 2% of the response value for the test with CO and lower than 6% for fecal samples. Finally, the reproducibility of the SmFeO3 sensor response and recovery times for fecal samples was also evaluated.

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