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

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 High-Performance Wireless Ammonia Gas Sensors Based on Reduced Graphene Oxide and Nano-Silver Ink Hybrid Material Loaded on a Patch Antenna

Sensors ◽  
2017 ◽  
Vol 17 (9) ◽  
pp. 2070 ◽  
Author(s):  
Bian Wu ◽  
Xingfei Zhang ◽  
Beiju Huang ◽  
Yutong Zhao ◽  
Chuantong Cheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Hybrid Material ◽  
Patch Antenna ◽  
High Performance ◽  
Ammonia Gas ◽  
Silver Ink ◽  
Reduced Graphene ◽  
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

Pt/AlGaN/GaN HEMT based ammonia gas sensors

2019 ◽  
Author(s):  
A. Ranjan ◽  
M. Agrawal ◽  
K. Radhakrishnan ◽  
N. Dharmarasu
Keyword(s):  
Gas Sensors ◽  
Ammonia Gas ◽  
Gan Hemt ◽  
Ammonia Gas Sensors

Ammonia Gas Sensors Based on In Situ and Drop-Coated Polyaniline Nanostructures

2013 ◽  
Vol 685 ◽  
pp. 134-138 ◽  
Author(s):  
Houria Kebiche ◽  
D. Debarnot ◽  
A. Merzouki ◽  
F. Poncin-Epaillard ◽  
N. Haddaoui
Keyword(s):  
Gas Sensors ◽  
Strong Dependence ◽  
Deposition Method ◽  
Ammonia Gas ◽  
Optical Absorbance ◽  
Glass Substrates ◽  
Mechanism Of Interaction ◽  
Ammonia Gas Sensors

Polyaniline (PANI) nanostructures are successfully prepared and deposited by in-situ and drop-coating on glass substrates without using any template. By changing synthesis and deposition method, a new morphology of nanostructures, “the cauliflower-like structure”, is developed. These nanostructures were then tested as optical ammonia gas sensors by measuring the optical absorbance variations at 632 nm at different NH3 concentrations. The results show a strong dependence of the morphology on the deposition method. The in-situ one leads to better performances compared to the drop coated one. Protonation /deprotonation is the mechanism of interaction between NH3 molecules and PANI nanostructures.

Flexible spray-coated TIPS-pentacene organic thin-film transistors as ammonia gas sensors

2013 ◽  
Vol 1 (40) ◽  
pp. 6532 ◽  
Author(s):  
Xinge Yu ◽  
Nanjia Zhou ◽  
Shijiao Han ◽  
Hui Lin ◽  
Donald B. Buchholz ◽  
...  
Keyword(s):  
Thin Film ◽  
Gas Sensors ◽  
Thin Film Transistors ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Ammonia Gas ◽  
Ammonia Gas Sensors

Development of Ammonia Gas Sensors with PPy Films on Base of Mg2SiO4 Porous Ceramics for Better Behavior of Chemo-Electrical Relationship

2013 ◽  
Vol 760-762 ◽  
pp. 363-367
Author(s):  
He Lan Ye ◽  
Zhao Xian Xiong ◽  
Hao Xue ◽  
Hong Qiu ◽  
Chun Xiao Song
Keyword(s):  
Gas Sensors ◽  
Xrd Analysis ◽  
Porous Ceramics ◽  
X Ray Diffraction ◽  
Sensitive Layer ◽  
Ammonia Gas ◽  
Linear Behavior ◽  
Resistance Variation ◽  
Relationship Of ◽  
Ammonia Gas Sensors

A new kind of gas sensors were prepared via chemical polymerization of polypyrrole (PPy) as sensitive layer on base of Mg2SiO4 porous ceramics. Thermal stability of the PPy sensitive layer was characterized with thermogravimetric analysis, including TG and DTA. Chemical structure of the samples was identified with X-ray diffraction (XRD) analysis. Microstructure of the PPy film was observed by a scanning electron microscope (SEM). Chemo-electrical relationship of the gas sensors was investigated with the resistance variation of PPy films at different gas concentrations. Based on series of experimental results, linear behavior of the chemo-electrical relationship was obtained for the gas sensor, y=0.00344x+1.33754, with R2=0.9734.

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