Array of Chromium Doped Nanostructured TiO2 Metal Oxide Gas Sensors

Gwiżdż, P.; Radecka, M.; Zakrzewska, K.

doi:10.1016/j.proeng.2014.11.345

Cited by 11 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulting sensor array showed high sensitivity and longterm stability to low gas concentration at 400 • C. Peng et al (2019) showed that the use of various additives contributing to improve sensitivity and recognition ability of the gas sensor array ZnO/SnO 2 -based thin films to CO, NO x , and SO 2 . Gwizdz et al (2014) studied the influence of chromium concentration on the sensing characteristics of TiO 2 -based sensor array. It was shown that the change of conductivity from n-type to p-type occurs for the sensitive TiO 2 layer consisting 1% Cr, and the 5% Cr TiO 2 exhibits the highest sensor response to hydrogen.…”

Section: Sensor Arraysmentioning

confidence: 99%

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

2021

View full text Add to dashboard Cite

Semiconductor metal oxides (SMOxs) are widely used in gas sensors due to their excellent sensing properties, abundance, and ease of manufacture. The best examples of these sensing materials are SnO2 and TiO2 that have wide band gap and offer unique set of functional properties; the most important of which are electrical conductivity and high surface reactivity. There has been a constant development of SMOx sensor materials in the literature that has been accompanied by the improvement of their gas-sensitive properties for the gas detection. This review is dedicated to compiling of these efforts in order to mark the achievements in this area. The main material-specific aspects that strongly affect the gas sensing properties and can be controlled by the synthesis method are morphology/nanostructuring and dopants to vary crystallographic structure of MOx sensing material.

show abstract

Section: Sensor Arraysmentioning

confidence: 99%

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

2021

View full text Add to dashboard Cite

show abstract

“…As can be noticed in Table 1, the operating temperature of MOX-based gas sensors is in the range of 25–1000 °C; hence silicon and alumina are commonly used gas-sensor substrate materials. To overcome the high operating temperatures, nanostructure forms of metal oxides have been recently proposed for gas sensors [41,42,43,44,45,46,47,48,49]. Another measurement technique that can be conducted at room temperature is a measurement in the microwave frequency range.…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Thin Films Prepared by Magnetron Sputtering Technology for Volatile Organic Compound Detection in the Microwave Frequency Range

2019

View full text Add to dashboard Cite

Metal oxide thin films such as copper oxide, titanium dioxide, and tin dioxide deposited by magnetron sputtering technology were verified as a gas-sensitive layer in microwave-based gas sensors operated at 2.4 GHz. The developed gas sensors were tested at room temperature (23 °C) and 50% relative humidity (RH) under exposure to 0–200 ppm of selected volatile organic compounds (acetone, ethanol, and methanol) that are of high interest in industry and biomedical applications. The highest responses to acetone were obtained for CuO-based gas sensors, to ethanol for SnO2-based gas sensors, while for methanol detection both dioxides, SnO2 and TiO2, exhibited good sensitivity.

show abstract

“…In the pursuit of discovering highly sensitive functionalized material for the detection of different vapors, carbon nanotubes [ 28 ], metal oxides [ 29 ], conducting polymers [ 6 , 30 ], and metal organic frameworks [ 31 ] have been developed thus far. Manganese dioxide is one of the materials used in the detection of CWAs that has applications in gas sensors [ 32 ], energy storage, water treatment, batteries, supercapacitors, and decomposition.…”

Section: Introductionmentioning

confidence: 99%

Nano-Sheet-like Morphology of Nitrogen-Doped Graphene-Oxide-Grafted Manganese Oxide and Polypyrrole Composite for Chemical Warfare Agent Simulant Detection

et al. 2022

View full text Add to dashboard Cite

Chemical warfare agents (CWAs) have inflicted monumental damage to human lives from World War I to modern warfare in the form of armed conflict, terrorist attacks, and civil wars. Is it possible to detect the CWAs early and prevent the loss of human lives? To answer this research question, we synthesized hybrid composite materials to sense CWAs using hydrothermal and thermal reduction processes. The synthesized hybrid composite materials were evaluated with quartz crystal microbalance (QCM) and surface acoustic wave (SAW) sensors as detectors. The main findings from this study are: (1) For a low dimethyl methyl phosphonate (DMMP) concentration of 25 ppm, manganese dioxide nitrogen-doped graphene oxide (NGO@MnO2) and NGO@MnO2/Polypyrrole (PPy) showed the sensitivities of 7 and 51 Hz for the QCM sensor and 146 and 98 Hz for the SAW sensor. (2) NGO@MnO2 and NGO@MnO2/PPy showed sensitivities of more than 50-fold in the QCM sensor and 100-fold in the SAW sensor between DMMP and potential interferences. (3) NGO@MnO2 and NGO@MnO2/PPy showed coefficients of determination (R2) of 0.992 and 0.975 for the QCM sensor and 0.979 and 0.989 for the SAW sensor. (4) NGO@MnO2 and NGO@MnO2/PPy showed repeatability of 7.00 ± 0.55 and 47.29 ± 2.69 Hz in the QCM sensor and 656.37 ± 73.96 and 665.83 ± 77.50 Hz in the SAW sensor. Based on these unique findings, we propose NGO@MnO2 and NGO@MnO2/PPy as potential candidate materials that could be used to detect CWAs.

show abstract

Array of Chromium Doped Nanostructured TiO2 Metal Oxide Gas Sensors

Cited by 11 publications

References 10 publications

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

Review: Influences of Semiconductor Metal Oxide Properties on Gas Sensing Characteristics

Metal Oxide Thin Films Prepared by Magnetron Sputtering Technology for Volatile Organic Compound Detection in the Microwave Frequency Range

Nano-Sheet-like Morphology of Nitrogen-Doped Graphene-Oxide-Grafted Manganese Oxide and Polypyrrole Composite for Chemical Warfare Agent Simulant Detection

Contact Info

Product

Resources

About