Formaldehyde Sensing Characteristics of a NiO-Based Sensor Decorated With Pd Nanoparticles and a Pd Thin Film

Chen, Huey-Ing; Hsiao, Cheng-Yu; Chen, Wei-Cheng; Chang, Che-Wei; Liu, I-Ping; Chou, Tzu-Chieh; Liu, Wen‐Chau

doi:10.1109/ted.2018.2819181

Cited by 17 publications

(9 citation statements)

References 33 publications

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“…3a are observed, confirming the chemoresistive-type sensing properties of the studied device. [17][18][19][20][21][22] Also, the current (resistance) is decreased (increased) with the increase in formaldehyde gas concentration, indicating the expected formaldehyde sensing ability of the studied sensor device. Experimentally, the current is decreased from 5.6 μA to 3.2 μA when the measured ambience is changed from the air to under 20 ppm HCHO/air gas at 225 °C.…”

Section: Resultsmentioning

confidence: 99%

“…[10][11][12][13][14][15][16][17][18] In addition, n-type SMOs, e.g. ZnO, 19 AZO, 20 and SnO 2 21 and p-type SMO, such as NiO, 22 have been reported to fabricate formaldehyde gas sensors. An interesting SMO, vanadium pentoxide (V 2 O 5 ), has attracted great attention in the fabrication of optoelectronic and energy storage devices due to its special physical/chemical properties.…”

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confidence: 99%

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Study of a Formaldehyde Gas Sensor Based on a Sputtered Vanadium Pentoxide Thin Film Decorated with Gold Nanoparticles

Niu

Liu²,

Pan

et al. 2021

ECS J. Solid State Sci. Technol.

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Formaldehyde (HCHO) gas sensing properties of a new sensor based on a sputtered vanadium pentoxide (V 2 O 5 ) thin film decorated with evaporated gold (Au) nanoparticles (NPs) are studied and reported herein. The use of Au NPs effectively increases the surface area/volume (S A /V) ratio and enhances the catalytic activity of Au metal. Experimentally, good p-type sensing characteristics, including a high sensing response ratio of 73.1% under 20 ppm HCHO/air gas and a small recovery time of 6.8 s at 225 °C, are obtained. An extremely low detecting level of 15 ppb HCHO/air is also acquired. Due to these advantages and the benefits of simple structure and easy fabrication, the studied Au NP/V 2 O 5 device is an excellent candidate for p-type consumption formaldehyde gas sensing and complementary metal oxide sensor array (CMOSA) applications.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Study of a Formaldehyde Gas Sensor Based on a Sputtered Vanadium Pentoxide Thin Film Decorated with Gold Nanoparticles

Niu

Liu²,

Pan

et al. 2021

ECS J. Solid State Sci. Technol.

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“…The high response is due to the chemical and electronic sensitization induced by Ag nanoparticles. The chemical sensitization of NiO thin films decorated with Pd was investigated in [ 132 ]. A Pd/NiO sensor demonstrated a good response (10.1) when operated at 250 °C towards 16 ppb of formaldehyde.…”

Section: Sensing Properties Of P-type Mox Thin Filmsmentioning

confidence: 99%

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Moumen

Kumarage

Comini

2022

Sensors

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This review focuses on the synthesis of p-type metal-oxide (p-type MOX) semiconductor thin films, such as CuO, NiO, Co3O4, and Cr2O3, used for chemical-sensing applications. P-type MOX thin films exhibit several advantages over n-type MOX, including a higher catalytic effect, low humidity dependence, and improved recovery speed. However, the sensing performance of CuO, NiO, Co3O4, and Cr2O3 thin films is strongly related to the intrinsic physicochemical properties of the material and the thickness of these MOX thin films. The latter is heavily dependent on synthesis techniques. Many techniques used for growing p-MOX thin films are reviewed herein. Physical vapor-deposition techniques (PVD), such as magnetron sputtering, thermal evaporation, thermal oxidation, and molecular-beam epitaxial (MBE) growth were investigated, along with chemical vapor deposition (CVD). Liquid-phase routes, including sol–gel-assisted dip-and-spin coating, spray pyrolysis, and electrodeposition, are also discussed. A review of each technique, as well as factors that affect the physicochemical properties of p-type MOX thin films, such as morphology, crystallinity, defects, and grain size, is presented. The sensing mechanism describing the surface reaction of gases with MOX is also discussed. The sensing characteristics of CuO, NiO, Co3O4, and Cr2O3 thin films, including their response, sensor kinetics, stability, selectivity, and repeatability are reviewed. Different chemical compounds, including reducing gases (such as volatile organic compounds (VOCs), H2, and NH3) and oxidizing gases, such as CO2, NO2, and O3, were analyzed. Bulk doping, surface decoration, and heterostructures are some of the strategies for improving the sensing capabilities of the suggested pristine p-type MOX thin films. Future trends to overcome the challenges of p-type MOX thin-film chemical sensors are also presented.

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“…These systems enable an accurate and rapid qualification and quantification of VOCs through the interactions that occur on the surface of the sensor when they experience contact with the analyte [ 30 , 31 ]. Due to their flexibility and scientifically relevant results, sensor array-based systems have proved their suitability for the assessment of common VOCs such as acetone [ 32 ], ethanol [ 33 ], butanol [ 34 ], formaldehyde [ 35 ], triethylamine [ 36 ], methanol [ 37 ], isopropanol [ 38 ], ethyl acetate [ 39 ], benzene [ 40 ], or acetic acid [ 41 ], among many others.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Thin Films for Detection and Quantification of Industrially Relevant Alcohols and Acetic Acid

Moura

Pivetta

Vassilenko

et al. 2023

Sensors

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Industrial environments are frequently composed of potentially toxic and hazardous compounds. Volatile organic compounds (VOCs) are one of the most concerning categories of analytes commonly existent in the indoor air of factories’ facilities. The sources of VOCs in the industrial context are abundant and a vast range of human health conditions and pathologies are known to be caused by both short- and long-term exposures. Hence, accurate and rapid detection, identification, and quantification of VOCs in industrial environments are mandatory issues. This work demonstrates that graphene oxide (GO) thin films can be used to distinguish acetic acid, ethanol, isopropanol, and methanol, major analytes for the field of industrial air quality, using the electronic nose concept based on impedance spectra measurements. The data were treated by principal component analysis. The sensor consists of polyethyleneimine (PEI) and GO layer-by-layer films deposited on ceramic supports coated with gold interdigitated electrodes. The electrical characterization of this sensor in the presence of the VOCs allows the identification of acetic acid in the concentration range from 24 to 120 ppm, and of ethanol, isopropanol, and methanol in a concentration range from 18 to 90 ppm, respectively. Moreover, the results allows the quantification of acetic acid, ethanol, and isopropanol concentrations with sensitivity values of 3.03±0.12*104, -1.15±0.19*104, and -1.1±0.50*104 mL−1, respectively. The resolution of this sensor to detect the different analytes is lower than 0.04 ppm, which means it is an interesting sensor for use as an electronic nose for the detection of VOCs.

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Formaldehyde Sensing Characteristics of a NiO-Based Sensor Decorated With Pd Nanoparticles and a Pd Thin Film

Cited by 17 publications

References 33 publications

Study of a Formaldehyde Gas Sensor Based on a Sputtered Vanadium Pentoxide Thin Film Decorated with Gold Nanoparticles

Study of a Formaldehyde Gas Sensor Based on a Sputtered Vanadium Pentoxide Thin Film Decorated with Gold Nanoparticles

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Graphene Oxide Thin Films for Detection and Quantification of Industrially Relevant Alcohols and Acetic Acid

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