A novel approach for green synthesis of WO3 nanomaterials and their highly selective chemical sensing properties

2020 ◽  
Vol 8 (39) ◽  
pp. 20373-20385
Author(s):  
Vardan Galstyan ◽  
Nicola Poli ◽  
Annalisa D'Arco ◽  
Salvatore Macis ◽  
Stefano Lupi ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Green Synthesis ◽  
Gas Sensors ◽  
Chemical Sensing ◽  
Selective Detection ◽  
Distilled Water ◽  
Sensing Properties ◽  
Novel Approach ◽  
Selective Chemical ◽  
Chemiresistive Gas Sensors

Preparation of WO3 nanoparticles using sodium chloride and distilled water and their application in chemiresistive gas sensors for the selective detection of acetone.

scholarly journals Multisensory Gas Chromatography for Field Analysis of Complex Gaseous Mixtures

2019 ◽  
Vol 3 (1) ◽  
pp. 13 ◽  
Author(s):  
Vladimir Dobrokhotov ◽  
Alexander Larin
Keyword(s):  
Gas Chromatography ◽  
Gas Sensors ◽  
Catalytic Properties ◽  
Field Analysis ◽  
Selective Detection ◽  
Gas Chromatograph ◽  
Gaseous Mixtures ◽  
Heavy Hydrocarbons ◽  
Novel Approach ◽  
Mox Sensors

A novel approach to analysis of complex gaseous mixtures is presented. The approach is based on the utilization of a compact gas chromatograph in combination with an array of highly integrated and selective metal oxide (MOX) sensors. Thanks to the implementation of a multisensory detector, the device collects multiple chromatograms in a single run. The sensors in the integrated MEMS platform are very distinct in their catalytic properties. Hence, the time separation by chromatographic column is complemented by catalytic separation by a multisensory detector. Furthermore, the device can perform the analysis in a broad range of concentrations, from ppb to hundreds of ppm. Low ppb and even sub-ppb levels of detection for some analytes were achieved. As a part of this effort, nanocomposite gas sensors were synthesized for selective detection of hydrogen sulfide, mercaptans, alcohols, ketones, and heavy hydrocarbons.

scholarly journals Growth Mechanisms of ZnO Micro-Nanomorphologies and Their Role in Enhancing Gas Sensing Properties

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1331 ◽  
Author(s):  
Ambra Fioravanti ◽  
Pietro Marani ◽  
Sara Morandi ◽  
Stefano Lettieri ◽  
Mauro Mazzocchi ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Gas Sensing ◽  
Functional Materials ◽  
Synthesis Process ◽  
Growth Mechanisms ◽  
Sensing Properties ◽  
Wet Chemical Synthesis ◽  
Gas Sensing Properties ◽  
Materials Used ◽  
Chemiresistive Gas Sensors

Zinc oxide (ZnO) is one of the main functional materials used to realize chemiresistive gas sensors. In addition, ZnO can be grown through many different methods obtaining the widest family of unique morphologies. However, the relationship between the ZnO morphologies and their gas sensing properties needs more detailed investigations, also with the aim to improve the sensor performances. In this work, seven nanoforms (such as leaves, bisphenoids, flowers, needles, etc.) were prepared through simple wet chemical synthesis. Morphological and structural characterizations were performed to figure out their growth mechanisms. Then, the obtained powders were deposited through screen-printing technique to realize thick film gas sensors. The gas sensing behavior was tested toward some traditional target gases and some volatile organic compounds (acetone, acetaldehyde, etc.) and compared with ZnO morphologies. Results showed a direct correlation between the sensors responses and the powders features (morphology and size), which depend on the specific synthesis process. The sensors can be divided in two behavioral classes, following the two main morphology kinds: aggregates of nanocrystals (leaves and bisphenoids), exhibiting best performances versus all tested gases and monocrystal based (stars, needle, long needles, flowers, and prisms).

A mixed-valent CuI/CuIImetal–organic framework with selective chemical sensing properties

CrystEngComm ◽  
2016 ◽  
Vol 18 (44) ◽  
pp. 8683-8687 ◽  
Author(s):  
Chengli Jiao ◽  
Xia Jiang ◽  
Hailiang Chu ◽  
Heqing Jiang ◽  
Lixian Sun
Keyword(s):  
Chemical Sensing ◽  
Sensing Properties ◽  
Selective Chemical ◽  
Organic Framework

Response Curve Modeling of Chemiresistive Gas Sensors by Modified Gompertz Functions

2021 ◽  
pp. 1-1
Author(s):  
Guanlin Tang ◽  
Sachin Navale ◽  
Pianpian Yang ◽  
Vikas Patil ◽  
Florian Stadler
Keyword(s):  
Gas Sensors ◽  
Response Curve ◽  
Curve Modeling ◽  
Chemiresistive Gas Sensors

Improving sensing properties of entangled carbon nanotube-based gas sensors by atmospheric plasma surface treatment

2020 ◽  
Vol 232 ◽  
pp. 111403 ◽  
Author(s):  
Neelakandan M. Santhosh ◽  
Aswathy Vasudevan ◽  
Andrea Jurov ◽  
Anja Korent ◽  
Petr Slobodian ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Surface Treatment ◽  
Gas Sensors ◽  
Atmospheric Plasma ◽  
Plasma Surface ◽  
Sensing Properties ◽  
Plasma Surface Treatment

One-pot green synthesis of optical fluorescent sensor for selective detection of Ni2+ ions and hydro gel studies

2020 ◽  
Vol 109 ◽  
pp. 110444
Author(s):  
J. Jone Celestina ◽  
P. Tharmaraj ◽  
C.D. Sheela ◽  
L. Alphonse ◽  
J. Shakina
Keyword(s):  
Green Synthesis ◽  
Fluorescent Sensor ◽  
Selective Detection ◽  
One Pot

Green synthesis of silver nanoparticles from deoiled brown algal extract via Box-Behnken based design and their antimicrobial and sensing properties

2017 ◽  
Vol 6 (2) ◽  
Author(s):  
Saravana Periaswamy Sivagnanam ◽  
Adane Tilahun Getachew ◽  
Jae Hyung Choi ◽  
Yong Beom Park ◽  
Hee Chul Woo ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Design Of Experiment ◽  
Synthesis Method ◽  
Statistical Design ◽  
Sensing Properties ◽  
Algal Extract

AbstractThe aim of this work was to acquire even and sphere-shaped silver nanoparticles (AgNPs) using statistical design of experiment. AgNPs were produced by green synthesis method using deoiled

Effect of substrate on NO2-sensing properties of WO3 thin film gas sensors

2000 ◽  
Vol 375 (1-2) ◽  
pp. 142-146 ◽  
Author(s):  
Dae-Sik Lee ◽  
Ki-Hong Nam ◽  
Duk-Dong Lee
Keyword(s):  
Thin Film ◽  
Gas Sensors ◽  
Sensing Properties

Characteristics and sensing properties of CO gas sensors based on LaCo 1−x Fe x O 3 nanoparticles

2017 ◽  
Vol 303 ◽  
pp. 97-102 ◽  
Author(s):  
Jun-Chao Ding ◽  
Hua-Yao Li ◽  
Tian-Ci Cao ◽  
Ze-Xing Cai ◽  
Xiao-Xue Wang ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Sensing Properties ◽  
Co Gas
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