Insights into g-C3N4 as chemi-resistive gas sensors towards VOCs and humidity- A review on state-of-the-art and recent advancements

2021 ◽  
Author(s):  
Parthasarathy Srinivasan ◽  
Soumadri Samanta ◽  
Akshay Krishnakumar ◽  
John Bosco Balaguru Rayappan ◽  
Kamalakannan Kailasam
Keyword(s):  
Carbon Nanotubes ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Gas Sensors ◽  
State Of The Art ◽  
2D Materials ◽  
The Past ◽  
Sensing Applications ◽  
Resistive Gas Sensors

Over the past decades, many materials like metal oxides, conducting polymers, carbon nanotubes, 2D materials, graphene, zeolites and porous organic frameworks (MOFs and COFs) have been explored for chemo-sensing applications...

scholarly journals Semiconductor Gas Sensors: Materials, Technology, Design, and Application

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6694
Author(s):  
Maria Vesna Nikolic ◽  
Vladimir Milovanovic ◽  
Zorka Z. Vasiljevic ◽  
Zoran Stamenkovic
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Operating Temperature ◽  
2D Materials ◽  
Semiconductor Materials ◽  
Technology Design

This paper presents an overview of semiconductor materials used in gas sensors, their technology, design, and application. Semiconductor materials include metal oxides, conducting polymers, carbon nanotubes, and 2D materials. Metal oxides are most often the first choice due to their ease of fabrication, low cost, high sensitivity, and stability. Some of their disadvantages are low selectivity and high operating temperature. Conducting polymers have the advantage of a low operating temperature and can detect many organic vapors. They are flexible but affected by humidity. Carbon nanotubes are chemically and mechanically stable and are sensitive towards NO and NH3, but need dopants or modifications to sense other gases. Graphene, transition metal chalcogenides, boron nitride, transition metal carbides/nitrides, metal organic frameworks, and metal oxide nanosheets as 2D materials represent gas-sensing materials of the future, especially in medical devices, such as breath sensing. This overview covers the most used semiconducting materials in gas sensing, their synthesis methods and morphology, especially oxide nanostructures, heterostructures, and 2D materials, as well as sensor technology and design, application in advance electronic circuits and systems, and research challenges from the perspective of emerging technologies.

scholarly journals Advanced development of metal oxide nanomaterials for H2 gas sensing applications

2021 ◽  
Author(s):  
Yushu Shi ◽  
Huiyan Xu ◽  
Tongyao Liu ◽  
Shah Zeb ◽  
Yong Nie ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
The Past ◽  
Sensing Applications ◽  
The Future ◽  
Metal Oxide Nanomaterials ◽  
Nanomaterials Synthesis ◽  
Advanced Development

The scheme of the structure of this review includes an introduction from the metal oxide nanomaterials’ synthesis to application in H2 gas sensors—a vision from the past to the future.

Polypyrrole coating of inorganic and organic materials by chemical oxidative polymerisation

2012 ◽  
Vol 66 (5) ◽  
Author(s):  
Mária Omastová ◽  
Matej Mičušík
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Clay Minerals ◽  
Radiation Shielding ◽  
Inorganic Materials ◽  
High Electrical Conductivity ◽  
New Materials ◽  
Nanoparticles Of Metal Oxides

AbstractPolypyrrole is one of the most frequently studied conducting polymers, having high electrical conductivity and stability, suitable for multi-functionalised applications. Coatings of chemically synthesised polypyrrole applied onto various organic and inorganic materials, such as polymer particles and films, nanoparticles of metal oxides, clay minerals, and carbon nanotubes are reviewed in this paper. Its primary subject is the formation of new materials and their application in which chemical oxidative polymerisation of pyrrole was used. These combined materials are used in antistatic applications, such as anti-corrosion coating, radiation-shielding, but also as new categories of sensors, batteries, and components for organic electronics are created by coating substrates with conducting polymer layers or imprinting technologies.

CNTFET Gas Sensors Using SWCNT Mats: Method for Low-cost Fabrication, Solution to Improve Selectivity, Experimental Results using Interfering Agents

2009 ◽  
Vol 1204 ◽  
Author(s):  
Paolo Bondavalli ◽  
Louis Gorintin ◽  
Pierre Legagneux ◽  
Didier Pribat ◽  
Laurent Caillier ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Field Effect ◽  
Gas Sensing ◽  
Field Effect Transistors ◽  
Low Cost ◽  
Experimental Results ◽  
Flexible Substrates ◽  
Metal Electrodes ◽  
Sensing Applications

AbstractThe first paper showing the great potentiality of Carbon Nanotubes Field Effect transistors (CNTFETs) for gas sensing applications was published in 2000 [1]. It has been demonstrated that the performances of this kind of sensors are extremely interesting: a sensitivity of around 100ppt (e.g. for NO2 [2]) has been achieved in 2003 and several techniques to improve selectivity have been tested with very promising results [2]. The main issues that have not allowed, up to now, these devices to strike more largely the market of sensors, have been the lack of an industrial method to obtain low-cost devices, a demonstration of their selectivity in relevant environments and finally a deeper study on the effect of humidity and the possible solutions to reduce it. This contribution deals with CNTFETs based sensors fabricated using air-brush technique deposition on large surfaces. Compared to our last contribution [3], we have optimized the air-brush technique in order to obtain high performances transistors (Log(Ion)/Log(Ioff) ∼ 5/6) with highly reproducible characteristics : this is a key point for the industrial exploitation. We have developed a machine which allows us the dynamic deposition on heated substrates of the SWCNT solutions, improving dramatically the uniformity of the SWCNT mats. We have performed tests using different solvents that could be adapted as a function of the substrates (e.g. flexible substrates). Moreover these transistors have been achieved using different metal electrodes (patented approach [4]) in order to improve selectivity. Results of tests using NO2, NH3 with concentrations between ∼ 1ppm and 10ppm will be shown during the meeting.

Enhancement of the gas sensing performance of carbon nanotube networked films based on their electrophoretic functionalization with gold nanoparticles

2015 ◽  
Vol 1786 ◽  
pp. 37-42 ◽  
Author(s):  
E. Dilonardo ◽  
M. Penza ◽  
M. Alvisi ◽  
C. Di Franco ◽  
D. Suriano ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Sensing Applications ◽  
Active Layers ◽  
Resistive Gas Sensors ◽  
Ppm Level ◽  
Fine Tune ◽  
Pollutant Gases ◽  
Higher Sensitivity

ABSTRACTControlled amounts of colloidal Au nanoparticles (NPs), electrochemically pre-synthesized, were directly deposited on MWCNTs sensor devices by electrophoresis. Pristine and Au-functionalized MWCNT networked films were tested as active layers in resistive gas sensors for detection of pollutant gases. Au-modified CNT-chemiresistor demonstrated higher sensitivity to NO2 detecting up to sub-ppm level compared to pristine one. The investigation of the cross-sensitivity towards other pollutant gases revealed the decrease of the sensitivity to NO2 with the increase of Au content, and, on the other side, the increase of that to H2S; therefore the fine tune of the metal loading on CNTs has allowed to control not only the gas sensitivity but also the selectivity towards a specific gaseous analyte. Finally, the sensing properties of Au-decorated CNT sensor seem to be promising in environmental and automotive gas sensing applications, based on low power consumption and moderate operating temperature.

scholarly journals Breath analysis by nanostructured metal oxides as chemo-resistive gas sensors

2015 ◽  
Vol 18 (3) ◽  
pp. 163-171 ◽  
Author(s):  
Marco Righettoni ◽  
Anton Amann ◽  
Sotiris E. Pratsinis
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Breath Analysis ◽  
Nanostructured Metal Oxides ◽  
Resistive Gas Sensors ◽  
Nanostructured Metal

scholarly journals Reduced Graphene Oxide (rGO)-Loaded Metal-Oxide Nanofiber Gas Sensors: An Overview

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1352
Author(s):  
Sanjit Manohar Majhi ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Reduced Graphene Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Reduced Form ◽  
Sensing Applications ◽  
Reduced Graphene ◽  
Electrospinning Method

Reduced graphene oxide (rGO) is a reduced form of graphene oxide used extensively in gas sensing applications. On the other hand, in its pristine form, graphene has shortages and is generally utilized in combination with other metal oxides to improve gas sensing capabilities. There are different ways of adding rGO to different metal oxides with various morphologies. This study focuses on rGO-loaded metal oxide nanofiber (NF) synthesized using an electrospinning method. Different amounts of rGO were added to the metal oxide precursors, and after electrospinning, the gas response is enhanced through different sensing mechanisms. This review paper discusses rGO-loaded metal oxide NFs gas sensors.

Resistive Gas Sensors Based on MWCNTs-PVP Composite Films

2014 ◽  
Vol 651-653 ◽  
pp. 84-87
Author(s):  
Huan He ◽  
Guang Zhong Xie ◽  
Yong Zhou ◽  
Hui Ling Tai
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Composite Films ◽  
Monolayer Film ◽  
Interdigitated Electrodes ◽  
Response Performance ◽  
Resistive Gas Sensors ◽  
Walled Carbon Nanotubes

In this paper, multiple-walled carbon nanotubes (MWCNTs) monolayer film and MWCNTs-polyvinylpyrrolidone (PVP) composite films were fabricated on interdigitated electrodes (IDEs) by airbrush technology, respectively. Response performance of all the sensors to various concentrations of vapors including methanol, ethanol, acetone, tetrahydrofuran, water and 1,2-dichloroethane were investigated. The results showed that a larger sensing response was obtained for the composite films compared with the MWCNTs monolayer film. Moreover, the MWCNTs-PVP composite films had a good selectivity for 1,2-dichloroethane vapor.

Nanostructured conducting polymers and their composites: synthesis methodologies, morphologies and applications

2020 ◽  
Vol 8 (30) ◽  
pp. 10136-10159 ◽  
Author(s):  
Yu Xue ◽  
Shuai Chen ◽  
Jiarui Yu ◽  
Benjamin R. Bunes ◽  
Zexu Xue ◽  
...  
Keyword(s):  
Size Effect ◽  
Conducting Polymers ◽  
State Of The Art ◽  
The Past ◽  
Nano Size

Nanostructured conducting polymers have been widely studied and applied in state-of-the-art technologies over the past few decades because they simultaneously offer the features of polymeric conductors and the nano-size effect of nanomaterials.

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