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Article
Engineering, Electrical & Electronic
K. GangaReddy et al.
Summary: Highly sensitive and selective ammonia sensors were developed based on Zn2+ doped NiO thin films with controlled morphology through a substrate temperature variation using the electron beam evaporation method. The prepared films were systematically characterized and confirmed to have good structural and elemental attributes. The Zn: NiO sensors exhibited excellent selectivity towards ammonia at room temperature, with higher sensitivity observed for films deposited at higher temperatures. The incorporation of Zn into NiO enhanced the sensor's response through increased adsorption of oxygen on the surface.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Maya Chauhan et al.
Summary: Metal oxide coated fiber optic sensor is proposed for alcohol sensing. The sensor probe design is based on cladding removed methodology using tapered fiber. The sensing principle relies on refractive index modification of tin dioxide nanoparticles (SnO2-NPs) after contact with isopropanol solution. The sensor shows high sensitivity, reversibility, and repeatability, making it suitable for online and remote alcohol monitoring.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Sanjay Kumar et al.
Summary: The aim of this research is to develop a highly selective and stable H2 gas sensor using pure ZnO and Pt nanoparticles loaded ZnO pencil-like micro-structures. The microstructures were synthesized using the hydrothermal route and characterized using various techniques. The hydrogen sensing properties were examined, and the optimal concentration of 1 at% Pt loaded ZnO microstructures showed a highly selective response at a reduced working temperature of 150 degrees Celsius.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Energy & Fuels
Yutian Xu et al.
Summary: This study presents a heterointerface engineering strategy using reduced L-glutathione (GSH) as a multifunctional molecule to improve the efficiency and stability of perovskite solar cells (PSCs). The introduction of GSH improves the crystallization of SnO2, enhances the affinity between SnO2 and perovskite, and passivates the defects at the heterogeneous interfaces while accelerating electron transport. The PSCs based on the GSH-SnO2 layer achieve a significantly increased power conversion efficiency (PCE) of 21.66% with no noticeable hysteresis and exhibit better environmental stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Ceramics
Ikram-ul haq et al.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Babu Bathula et al.
Summary: This review article provides an overview of the current developments in SnO2 quantum dots (QDs) as effective catalysts over the last five years. SnO2 QDs have high potential for catalytic applications due to their unique characteristics such as high surface area, compact size, and adjustable optical properties. Recent progress in the production and functionalization of SnO2 QDs has enabled their successful use as photocatalytic catalysts. The article covers the fundamental concepts, production techniques, and challenges associated with using SnO2 QDs as catalysts, and provides insights into the future research directions in this field.
Article
Energy & Fuels
Jun Sung Jang et al.
Summary: This study reports the improved long-term stability of kesterite Cu2ZnSn(S,Se)(4) (CZTSSe) thin-film solar cells (TFSCs) using oxide/metal/oxide (OMO)-based transparent conducting electrodes (TCEs), specifically ZnO-based oxide/Ag/Al-doped ZnO (AZO), with post heating treatment. The CZTSSe TFSCs with Ga-doped ZnO containing OMO TCEs show excellent long-term stability with minimal power conversion efficiency (PCE) losses, while TFSCs with conventional AZO TCEs experience significant PCE losses after several months. The passivation mechanism of the Ag-doped ZnO interfacial layer in the OMO TCEs is also demonstrated.
Article
Materials Science, Ceramics
M. Boomashri et al.
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
Chemistry, Physical
Yu-Chih Tzeng et al.
Summary: This study reports novel Al alloy anodes obtained by adding In and Bi to a reported Al-Zn-Sn ternary-element alloy. The elemental composition of Al-5Zn-0.1Sn, Al-5Z-0.1Sn-0.1In, and Al-5Zn-0.1Sn-0.1In-0.1Bi is determined using an electron probe microanalyzer. Tafel analysis, electrochemical impedance spectroscopy, and constant-current chronopotentiometry are performed for electrochemical analysis. The results indicate that Al-5Zn-0.1Sn-0.1In-0.1Bi exhibits the highest anode performance, and the dissolution and sedimentation process induced by Bi nanoprecipitates may enhance the discharge efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mrunmoy Jena et al.
Summary: This paper reports the TL properties of Li3PO4 doped with Dy3+ ions. The synthesis method, characterization techniques, and irradiation experiments are described. The results show that the phosphor doped with 0.2 mol% Dy3+ exhibits the highest TL intensity, with linear TL response for UV-C irradiation and gamma irradiation up to 3 kGy. The study also presents the trapping parameters obtained through glow curve deconvolution and highlights the promising properties of the material as a TL dosimeter.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Physical
Y. Shi et al.
Summary: Detection of ethanol is crucial in various fields due to its explosive, colorless and volatile nature. Metal oxide semiconductors (MOS) gas sensors, particularly those based on indium oxide (In2O3), have gained attention for their low cost and convenient detection. This paper summarizes the strategies used in the last decade to enhance the performance of In2O3-based gas sensors for ethanol detection, including morphology modification, doping, heterojunction construction, and the use of composite materials. The sensing mechanism for ethanol detection by gas sensors is also presented.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Environmental Sciences
Vempuluru Navakoteswara Rao et al.
Summary: In order to reduce environmental pollution and carbon-based gas emissions, photocatalytic hydrogen production and sensing applications at ambient temperature are crucial. This research focuses on developing new 0D/1D materials based on TiO2 nanoparticles grown onto CdS hetersturctured nanorods through a two-stage synthesis process. The optimized nanohybrid showed excellent stability and a high photocatalytic hydrogen production rate. Furthermore, the nanomaterial exhibited superior gas sensing performance for NO2 detection at room temperature, with increased sensitivity when activated by UV light. Overall, the 1D/0D CdS@TiO2 material proved to be efficient for both hydrogen production and gas detection.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Materials Science, Multidisciplinary
T. Prakash et al.
Summary: CdO crumpled sheets were synthesized by microwave-assisted irradiation in alkaline solutions of NH4OH and NaOH, respectively, with the presence of a surfactant. The morphology of CdO samples was characterized by SEM and TEM. XRD analysis revealed the crystalline phases of CdO formed during synthesis and annealing at 300°C. The CdO nanostructures prepared using NH4OH showed superior sensitivity to NO2, with detection even at a low concentration of 0.14 ppm, and excellent selectivity compared to the CdO sample prepared using NaOH.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Mahsa Souri et al.
Summary: Biomorphic Ce-doped SnO2 microtubules were fabricated using absorbent cotton as a bio-template and Ce as a dopant. XRD and FE-SEM were used to analyze the chemical composition and microstructure. The sensitivity and response/recovery time of the sensors were improved by incorporating heterostructures and utilizing the redox reaction of Ce3+/Ce4+ and biotemplate effect. The fabricated sensors showed enhanced response to ethanol and were tested against other VOCs.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
Su Keun Kuk et al.
Summary: Conventional studies on photocatalytic oxidation reaction have predominantly focused on hydroxyl radical (center dot OH) as the primary reactive oxygen species (ROS). However, this perspective may not be suitable for gaseous HCHO photodegradation due to the short lifetime and diffusion length of center dot OH. Therefore, it is necessary to identify divergent ROS and understand their characteristics for gas-phase photocatalytic oxidation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
T. Raguram et al.
Summary: In this study, copper-doped TiO2 nanoparticles with different molar concentrations of copper precursor were synthesized via sol-gel technique. The effects of copper doping on the properties of TiO2 were analyzed systematically, and it was found that 0.1 M concentration of Cu was the optimum dopant concentration for DSSC and photocatalytic applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Chao Zhang et al.
Summary: In this study, hollow sphere sensors based on In2O3 were prepared using the soft template method for the detection of low concentrations of volatile organic compounds (VOCs) for early diagnosis of lung cancer. The Ag-In2O3 composite sensors showed the highest response to isopropanol and had a significant improvement compared to pure In2O3 sensors, with shortened response and recovery time.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Chemistry, Multidisciplinary
Shiqiang Zhou et al.
Summary: This study successfully improved the performance of formaldehyde gas sensors by synthesizing cobalt-doped tin dioxide nanoparticles. The sensors showed excellent selectivity and response to formaldehyde, and were capable of detecting formaldehyde at low concentrations.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Mohini Panday et al.
Summary: Antimony-doped SnO2 thin films were prepared and tested as gas and humidity sensors. The results showed that the doping of antimony can significantly affect the optical and electrical properties of the films, leading to excellent sensing response at different temperatures and humidities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Ravindra Kumar Jha et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Yoshitake Masuda
Summary: This review focuses on tin oxide nanomaterials, which are actively researched as semiconductor-type gas sensors. The development and applications of novel tin oxide nanomaterials in the past decade are discussed, with a focus on how dimensions and morphology affect sensing performance. The dendritic structure formed by 2D nanosheets connected by crystal growth points towards future sensor development, while the high gas adsorption performance and reactivity of metastable crystal planes provide guidance for future sensor development.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
K. GangaReddy et al.
Summary: In this study, NiO thin films were prepared by electron beam evaporation technique and their sensing performance for formaldehyde gas was investigated. The results showed that the NiO thin film prepared at a deposition temperature of 400 degrees Celsius exhibited good selectivity, fast response and recovery towards formaldehyde.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Siyuan Lv et al.
Summary: In this study, a mixed potential type acetone gas sensor was developed for noninvasive screening of diabetes. The sensor exhibited good sensitivity, response time, and recovery time, and demonstrated good repeatability, stability, reliability, and selectivity. The response value of the sensor was also influenced by the relative humidity value.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Review
Nanoscience & Nanotechnology
Yulin Kong et al.
Summary: SnO2 has been extensively used as a gas sensing material due to its excellent properties and reliability. However, traditional SnO2 gas sensors have limitations such as high work temperature, low gas response, and poor selectivity. The application of nanotechnology in preparing SnO2 nanomaterials can improve the performance of gas sensors, leading to expanded applications.
NANO MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Pengyu Ren et al.
Summary: The indoor environment of buildings has a significant impact on people's daily life. This study focuses on the detection of harmful gases using gas sensors for the development of green buildings. The researchers designed SnO2-sensing materials with excellent structures and prepared three types of hierarchical SnO2 microspheres. Among them, the urchin-like microspheres demonstrated improved gas-sensing performance for formaldehyde gas. The structural difference of smaller nanorods was identified as the main reason for the improved gas-sensing properties.
Article
Engineering, Electrical & Electronic
Rahul Prajesh et al.
Summary: This paper presents the development of gold-doped tin oxide (SnO2) film, highly sensitive for carbon monoxide (CO) gas, prepared by radiofrequency (RF) sputtering. The gold-doped film showed a significantly enhanced response compared to pristine SnO2, indicating potential for detection of low concentrations of CO gas.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Computer Science, Information Systems
Haythem Ahmad Bany Salameh et al.
Summary: This article introduces an integrated end-to-end wireless sensor network system for LPG detection and monitoring, which can operate flexibly in different environments. Through an efficient communication protocol, data exchange is organized, and experimental test data are used to demonstrate the reliability and accuracy of the system.
IEEE SYSTEMS JOURNAL
(2021)
Review
Chemistry, Analytical
Stephan Steinhauer
Summary: Metal oxide semiconductors, particularly copper oxide nanomaterial-based devices, have been widely used in chemical sensors for detecting various gaseous analytes. Literature reports highly sensitive detection of target molecules including volatile organic compounds, hydrogen sulfide, carbon monoxide, carbon dioxide, hydrogen, and nitrogen oxide from parts-per-million down to parts-per-billion concentrations. Physico-chemical mechanisms for sensing and transduction are summarized, with prospects for future developments outlined.
Article
Physics, Multidisciplinary
Asaad M. Abbas et al.
Summary: In this study, Ag-loaded SnO2 nanoparticles were successfully synthesized using a hydrothermal method, with XRD and FE-SEM analysis showing that increasing Ag concentration resulted in changes in particle size and crystallinity, leading to higher sensitivity to NO2 gas.
BRAZILIAN JOURNAL OF PHYSICS
(2021)
Article
Environmental Sciences
Karn Vohra et al.
Summary: The study demonstrates the significant impact of the fossil fuel component of PM2.5 on global premature mortality. The steeper concentration-response function slope at lower concentrations leads to higher estimates in Europe and North America, while the slower drop-off in slope at higher concentrations results in higher estimates in Asia.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Yan Ran et al.
Summary: The study prepared a sensor for formaldehyde detection using different ratios of Sm-doped SnO2 nanoparticles, and found that the optimal compound ratio was 5.0 mol%, with an optimal operating temperature of 160 degrees C. The sensor exhibited high gas response, reliable stability, and selectivity to formaldehyde, attributed to the average grain size of the nanoparticles and the positive role of Sm.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Review
Chemistry, Analytical
Calvin Love et al.
Summary: This work provides a comprehensive review of sensing materials for agricultural monitoring applications, discussing their performance characteristics and commercial viability. It suggests utilizing multiple sensing materials to detect a single target gas to mitigate selectivity issues.
Article
Chemistry, Physical
Ramasamy Santhosh Kumar et al.
Summary: The increase in world population has led to a greater need for solutions to health and environmental issues. The development of Fe3O4@PPy/rGO nanohybrids has shown promising results in electrochemical detection of dopamine and photodegradation of acetaminophen. The study provides a new direction for the use of metal oxide conducting polymer and graphene-based catalysts in multifunctional applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Dongmin An et al.
Summary: Metal oxide semiconductor-based sensors doped with Sm show promising results for ethanol gas detection with high response and outstanding selectivity, indicating potential applications in trace gas detection. The enhancement response of Sm-doped SnO2 nanocomposites was also discussed.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
K. Khamfoo et al.
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.
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