Article
Chemistry, Analytical
Soichiro Torai, Taro Ueda, Kai Kamada, Takeo Hyodo, Yasuhiro Shimizu
Summary: Porous (pr-)SnO2-based powders were synthesized using ultrasonic spray pyrolysis with home-made polymethylmethacrylate (PMMA) microspheres as templates. The addition of CuxO to the pr-SnO2 powder improved its sensing properties for acetone and toluene. The 0.8 wt% Cu-added pr-SnO2 sensor showed the highest acetone response at 350 degrees C. The addition of CuxO decreased the concentration of carrier electrons and the acetone-oxidation activity, leading to the improvement of the acetone-sensing properties of the pr-SnO2 sensor.
Article
Materials Science, Ceramics
Jian Fang, Xi Chen, Rong-Pu Xiao, Jing-Jing Xue, Ji-Ming Song
Summary: In this study, Pr-SnO2/In(2)O(3) composite material was successfully prepared by synthesis and decoration methods, and it showed good sensing performance for ethanol gas.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
M. Boomashri, P. Perumal, K. V. Gunavathy, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Mohd Shkir, S. AlFaify
Summary: This paper investigates the gas-sensing properties of Sb-doped SnO2 thin films prepared through nebulizer-assisted spray pyrolysis. The results show that 0 to 5 wt% Sb doping improves the inherent characteristics of the transparent conducting oxide. The 2-wt%-Sb-doped SnO2 film exhibits a high response rate and suitable characteristics to detect 250 ppm ammonia as a gas sensor.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Farshad Khoshnood, Sohrab Manouchehri, Mohammad Hasan Yousefi
Summary: In this work, SnO2 nanostructure layers doped with different weight percentages of Ag were fabricated using spray pyrolysis. The sensing characteristics of these samples to H2S gas were investigated. The results showed that doping with Ag improved the sensing properties of the samples, with the 4 wt.% Ag-doped sample performing the best.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Analytical
Ki Beom Kim, Young Kook Moon, Tae-Hyun Kim, Byeong-Hun Yu, Hua-Yao Li, Yun Chan Kang, Ji-Wook Yoon
Summary: A novel raisin bread-structured film, fabricated by mixing two different types of oxide hollow spheres, has been developed for the selective and sensitive detection of carcinogenic benzene. The film demonstrated high selectivity to less reactive benzene compared to pure SnO2 or Pd-Co3O4 hollow sphere films. This work provides a simple and rational strategy to achieve gas selectivity to chemically stable benzene and has the potential to advance the development of portable devices for monitoring airborne benzene.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Alwan M. Alwan, Husam R. Abed, Ali A. Yousif
Summary: This study successfully prepared and investigated the characteristics of tin dioxide at different deposition temperatures, finding that tin dioxide deposited at 350 degrees Celsius exhibits high response capability to ammonia gas at room temperature.
Article
Thermodynamics
Zhicheng Chen, Zuwei Xu, Haibo Zhao
Summary: CuO-doped SnO2 nanoparticles with different CuO mass fractions were synthesized by flame spray pyrolysis and applied to thin-film gas sensors for H2S detection. The optimal sensor with 0.5 wt% CuO doping showed the highest response to 10 ppm H2S at 125 degrees C, indicating its potential for practical industrial applications.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Materials Science, Multidisciplinary
Sunghoon Park, Young Woo Jung, Gwang Min Ko, Dae Yong Jeong, Chongmu Lee
Summary: In this study, In2O3 NP-decorated SnO2 NW sensor demonstrated strong response to NO2 and fast sensing speed. The importance of heterostructure formation and operating temperature optimization on the sensor response was confirmed through experimental results, with a focus on the gas sensing mechanism of the nanostructures for different sensing variables.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Ramarajan Ramanathan, Selvakumar Nagarajan, Venkataramana Bonu, Priyanka Patel, Shubhangi Jamdar, Harish C. Barshilia, Ramesh Chandra Mallik
Summary: Thin film technology offers possibilities and advancements in gas sensor devices. Sb-doped nanometer thin-SnO2 films were developed for CO/NH3 gas detection. The structural, surface, optical, and resistivity properties were investigated as a function of film thickness. ATO thin films showed enhanced response towards CO/NH3 gas detection with better stability and selectivity for CO gas. The results indicate the potential application of nanometer ATO films for enhanced gas detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
K. Khamfoo, A. Wisitsoraat, M. Punginsang, A. Tuantranont, C. Liewhiran
Summary: Nb-doped SnO2 nanoparticles were synthesized via flame spray pyrolysis for the first time, with 0.5 wt% Nb content providing the best sensor response to 1 vol% C2H2 at 350 degrees Celsius. The sensor also exhibited low humidity dependence, good long-term stability, and high C2H2 selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Muhammed Emin Gulduren, Demet Iskenderoglu, Harun Guney, Emre Gur, Merve Acar, Sibel Morkoc Karadeniz
Summary: Pure and nickel doped copper oxide thin films were grown successfully using ultrasonic spray pyrolysis method. The effects of nickel doping on the properties of the films were investigated through various analyses, such as XRD, SEM, UV-visible spectroscopy, photoluminescence spectroscopy, gas sensing measurements, and X-ray photoelectron spectroscopy. It was found that the doping concentration influenced the structural, morphological, optical, and gas sensing properties of the films. The results showed that the nickel doping modified the crystal structure, grain size, absorbance features, bandgap, luminescent emissions, and gas sensing responsivity of the copper oxide films.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Muhammed Emin Gulduren, Demet Iskenderoglu, Harun Guney, Sibel Morkoc Karadeniz, Merve Acar, Emre Gur
Summary: The effects of different Cr doping concentrations on the morphology, structure, optical and gas sensing properties of CuO thin films were investigated. The results showed that Cr doping altered the crystal structure, morphology, and optical properties of CuO, and significantly enhanced the sensitivity of the gas sensor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
R. Souissi, N. Bouguila, M. Bendahan, K. Aguir, T. Fiorido, M. Abderrabba, I Halidou, A. Labidi
Summary: The importance of detecting ozone and its impact on human health; Gas sensors based on In2S3 films prepared have high sensitivity and low detection limits; The gas sensor at a working temperature of 160 degrees Celsius exhibits good rapidity and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Mehdi Akbari-Saatlu, Marcin Procek, Claes Mattsson, Goran Thungstrom, Tobias Torndahl, Ben Li, Jiale Su, Wenjuan Xiong, Henry H. Radamson
Summary: Designing heterostructure materials at the nanoscale is a well-known method to enhance gas sensing performance. In this study, ZnO/SnO2 heterostructures were grown on alumina substrates using the ultrasonic spray pyrolysis method. The results showed that the sensitivity of the sensor to H2S gas can be altered by changing the zinc chloride content in the precursor, and the heterostructures with a 5:1 ratio of ZnCl2 to SnCl2·2H(2)O exhibited the highest response. The gas sensing mechanism of the ZnO/SnO2 heterostructures was analyzed and attributed to the formation of the heterostructure between ZnO and SnO2.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
A. Sukee, A. Wisitsoraat, A. Tuantranont, C. Liewhiran
Summary: The 0.1-2 wt% Ir-loaded tin dioxide nanoparticles prepared via flame spray pyrolysis were found to be effective in sensing formic acid. These nanoparticles exhibited core-shell structures containing Ir degrees and Ir4+ species, enhancing the specific surface area and reducing the crystallize size of SnO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Kengo Oda, Hiroaki Saitoh, Yuto Hoaki, Hayato Shimoda, Toyoki Hirao, Wataru Ichiyoshi, Satoko Takase, Youichi Shimizu
SOLID STATE IONICS
(2020)
Article
Chemistry, Analytical
Taro Ueda, Thomas Defferriere, Takeo Hyodo, Yasuhiro Shimizu, Harry L. Tuller
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Nanoscience & Nanotechnology
Nantikan Tammanoon, Takumi Iwamoto, Taro Ueda, Takeo Hyodo, Anurat Wisitsoraat, Chaikarn Liewhiran, Yasuhiro Shimizu
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Analytical
Taro Ueda, Inci Boehme, Takeo Hyodo, Yasuhiro Shimizu, Udo Weimar, Nicolae Barsan
Article
Materials Science, Ceramics
Takeo Hyodo, Takeru Hiura, Kazunori Nagae, Taro Ueda, Yasuhiro Shimizu
Summary: Adsorption/combustion-type gas sensors show large dynamic responses to volatile organic compounds under pulsed temperature heating. The co-loading of Pt with CeO2 onto gamma-Al2O3 was found to be the most effective in enhancing the dynamic response by efficiently oxidizing various compounds adsorbed at 150 degrees Celsius to form CO2.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Electrochemistry
Satoko Takase, Ayumi Kimoto, Masaki Kusunoki, Youichi Shimizu
Summary: The study demonstrated that hydrophilicity affects the oxygen reduction current differently in the reaction rate-determining range and the diffusion rate-determining range. Increasing hydrophilicity extends the three-phase interface in the reaction rate-determining range, while in the diffusion rate-determining range, high hydrophilicity suppresses oxygen diffusion.
Article
Chemistry, Multidisciplinary
Taro Ueda, Inci Boehme, Takeo Hyodo, Yasuhiro Shimizu, Udo Weimar, Nicolae Barsan
Summary: The study found that the resistance of the sensor loaded with gold in dry air was lower than that of the sensor without gold. Additionally, the characteristic spectral band of oxygen adsorbates increased significantly, leading to an improvement in the adsorption of NO2.
Article
Electrochemistry
Shotaro Nomoto, Hiroki Kitamura, Satoko Takase, Youichi Shimizu
Summary: Transition metal-tungsten nitrides were synthesized and their electrocatalytic properties on oxygen reduction and evolution reactions were studied. Co3W3N showed high oxygen electrocatalytic performance, while Ni-doped (Co1-xNix)(3)W3N exhibited the best bifunctional electrocatalytic properties.
Article
Chemistry, Analytical
Mehrdad Asgari, Fahimeh Hooriabad Saboor, Seyed Parsa Amouzesh, Martin Watt Coull, Abbas Ali Khodadadi, Yadollah Mortazavi, Takeo Hyodo, Yasuhiro Shimizu
Summary: SiO2/ZnO core/shell sensors were synthesized using ultrasonic-assisted deposition-precipitation method. The addition of silica as the core material enhanced the selectivity, stability, and reversibility of the sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Takeo Hyodo, Toshiro Okusa, Wataru Sakata, Taro Ueda, Yasuhiro Shimizu
Summary: This study discusses the effects of surface modification of Pt sensing electrodes with Au on the H2-sensing properties and mechanism of gas sensors based on anodized titania. The results show that the addition of Au significantly enhances the H2 response of the Pt/TiO2 sensor, and the presence of moisture further increases the H2 response.
Article
Chemistry, Analytical
Soichiro Torai, Taro Ueda, Kai Kamada, Takeo Hyodo, Yasuhiro Shimizu
Summary: Porous (pr-)SnO2-based powders were synthesized using ultrasonic spray pyrolysis with home-made polymethylmethacrylate (PMMA) microspheres as templates. The addition of CuxO to the pr-SnO2 powder improved its sensing properties for acetone and toluene. The 0.8 wt% Cu-added pr-SnO2 sensor showed the highest acetone response at 350 degrees C. The addition of CuxO decreased the concentration of carrier electrons and the acetone-oxidation activity, leading to the improvement of the acetone-sensing properties of the pr-SnO2 sensor.
Article
Chemistry, Physical
Yuma Tano, Muhammad Sohail Ahmad, Yuya Watase, Tatsuki Tsugawa, Satoko Takase, Yusuke Inomata, Kazuto Hatakeyama, Shintaro Ida, Quitain Armando, Youichi Shimizu, Tetsuya Kida
Summary: This study investigates the impact of oxygen functional groups on the graphene support material in Sn/graphene composites. It reveals that Sn nanoparticles anchored on epoxy-functionalized graphene oxide facilitate the efficient generation of formic acid. The study emphasizes the crucial role of support materials in electrocatalytic performance and offers insights into optimizing the support material for the conversion of CO2 into renewable fuels.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Materials Science, Ceramics
Takeo Hyodo
Summary: This article reviews the compositional and microstructural design techniques of various promising materials for advanced gas-sensing devices. Strict control over mesopores and macropores is achieved through self-assembly and chemical modification, respectively, resulting in improved gas reactivity and diffusivity. Temperature-modulation and light-driven operations are also effective in enhancing gas sensitivity and selectivity. These novel approaches are instrumental for further growth and development of gas sensors.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Takeo Hyodo, Azusa Iwanaga, Keijiro Ishida, Kai Kamada, Taro Ueda, Yasuhiro Shimizu
Summary: The study focused on the impact of noble metals on the gas-sensing properties of indium oxide (In2O3) powders under UV-light irradiation for NO2, H2, and ethanol. Gold (Au) loading significantly enhanced the response of the In2O3 sensor to NO2, particularly under weak UV-light, while palladium (Pd) loading efficiently increased the conductance difference between NO2 and air for the sensor under UV-light irradiation.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2021)
