gas sensing properties of p type cubi2o4 porous
BJNANOGas-sensing behaviour of ZnO/diamond
The gas sensing properties of the hybrid sensor structure were further enhanced through the combination of nanocrystalline diamond and ZnO NRs the conduction mechanism of which becomes rather complex. We assume that at the ZnO/NCD interface the electrons in the ZnO conduction band are attracted to the interface by the p-type NCD.
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Iraqi Academic Scientific JournalsIASJ
The electrical properties and sensitivity to CO2 gas were investigated to Al/AuNPs/PS/c-Si/Al we found that AuNPs plays crucial role to enhance this properties. Keywords Porous silicon gold nanoparticle electrical properties gas sensing.
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Gas sensing response analysis of p-type porous chromium
The ethanol sensing properties of porous Cr 2 O 3 thin films deposited by the ultrasonic nebulized spray pyrolysis of an aqueous combustion mixture is reported. The impact of the precursor selection and various deposition parameters on the film crystallinity surface morphology and stoichiometry are studied using thermo-gravimetric analysis X-ray diffraction scanning electron microscopy
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Dai-Hong KIM Seoul National University Seoul SNU
The flux-mediated one-pot solution process based on the metal-organic decomposition (MOD) has been developed for the preparation of p-type complex oxide semiconductor CuBi2O4 thin films.
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Chemical Tuning versus Microstructure Features in Solid
Gas sensing properties of p-type CuBi2O4 porous nanoparticulate thin film prepared by solution process based on metal-organic decomposition. Sensors and Actuators B Chemical 2018 268 . DOI 10.1016/j.snb.2018.04.105. Xiaomin Xu Wei Wang Wei Zhou Zongping Shao.
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SnO2 monolayer porous hollow spheres as a gas sensor
Oct 13 2009 · A gas sensor based on the as-grown monolayer hollow spheres showed superior gas sensing performance. The sensitivity of the sensor was up to 51 when exposed to 100 ppm ethanol. This improvement was attributed to the exceedingly large activated area and enhanced depletion effect generated by the unique monolayer porous and spherical structure.
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CO2 sensing properties of Zr-added porous CaFe2O4 powder
The gas sensing properties of Zr-added and pure CaFe 2 O 4 powders for CO 2 in air were examined in the temperature range of °C. The semiconductor-type gas sensor made from pure CaFe 2 O 4 powder showed a fairly good response to CO 2.Furthermore the addition of a small amount of Zr into CaFe 2 O 4 powder was found to be effective for enhancing the CO 2 response of the present gas
Get PriceImproved NO 2 Gas Sensing Properties of Graphene Oxide
Mar 20 2018 · Improved NO 2 Gas Sensing Properties of Graphene Oxide as RGO film exhibited the electrical behavior of a p-type Tan A. T. L. Dravid V. P. Huang J. X. Steam Etched Porous
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Chemical Tuning versus Microstructure Features in Solid
Gas sensing properties of p-type CuBi2O4 porous nanoparticulate thin film prepared by solution process based on metal-organic decomposition. Sensors and Actuators B Chemical 2018 268 . DOI 10.1016/j.snb.2018.04.105. Xiaomin Xu Wei Wang Wei Zhou Zongping Shao.
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P-type Co3O4 nanomaterials-based gas sensor Preparation
Apr 01 2017 · Intelligent test system (RQ-2 China) can track the sensing properties of gas sensors. Sensitivity is an important parameter and the ratio of resistance (S = R g /R a) is used to define the sensitivity of p-type sensors .Here R g and R a represent resistances of sensors placed in test gas and in air circumstance respectively. The response time is defined as a period of time taken by the
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"Towards p-Type Conductivity in SnO2Nanocrystals through
Oct 03 2016 · The gas sensing properties of the diodes were investigated by using Cl2 Br2 HCl NO NO2 CHCl3 NH3 and H2. Of all the gases tested the sensor had very good sensitivity to Cl2 and had a response of 80 at 400 ppb of Cl2. Using a compression technique porous diodes consisting of n-type (antimony doped SnO2) and the p-type (lithium-doped
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A review on mechanisms and recent developments in p-n
Feb 25 2021 · 2D materials and their heterojunctions have been explored for gas sensing applications due to their tremendous surface-to-volume ratio active edges with atomic thickness and tunable electrical properties. Heterostructures of 2D materials exhibit absolutely novel physics and versatility with accelerated device performance by integrating the atomic scale properties of individual materials.
Get PricePorous SnO2 hierarchical nanosheets hydrothermal
Moreover gas sensing tests showed that the sensor using porous SnO 2 hierarchical nanosheets after annealing at 600 °C for 2 h exhibited better gas sensing properties compared with the sensor based on conventionally prepared SnO 2 nanoparticles. The enhancement in gas sensing properties was attributed to their unique structures.
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Hierarchical SnO 2 nanostructures for potential VOC sensor
Mar 02 2021 · Park KR Cho H-B Lee J Song Y Kim W-B Choa Y-H (2019) Design of highly porous SnO 2-CuO nanotubes for enhancing H 2 S gas sensor performance. Chemical Sensors and Actuators B p 127179. Google Scholar 22. Kim H-J Lee J-H (2014) Highly sensitive and selective gas sensors using p-type oxide semiconductors overview.
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Gas Permeation Properties of High-Silica CHA-Type Zeolite
The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study and the gas permeation properties were determined using single-component H2 CO2 N2 CH4 n-C4H10 and SF6 at 303–473 K. The membrane showed permeation behavior wherein the permeance reduced with the molecular size attributed to the effect of molecular sieving.
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Review of ZnO-based nanomaterials in gas sensors
Feb 01 2021 · This is consistent with the gas sensing performance of the material the same materials with different morphologies have different gas sensing properties . For example porous materials generally have better performance than solid particles due to their many pores high porosity and large specific surface area etc.
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Direct Printing Synthesis of Self-Organized Copper Oxide
Gas sensing properties of p-type CuBi2O4 porous nanoparticulate thin film prepared by solution process based on metal-organic decomposition. Sensors and Actuators B Chemical 2018 268 . DOI 10.1016/j.snb.2018.04.105.
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Study on room temperature gas-sensing performance of CuO
CuO is a p-type semiconductor with a low band gap of 1.2–2.0 eV and its p-type characteristic provides a route to form p–n junctions with n-type metal oxides . CuO has been used successfully to detect H 2 S using a range of p–n composite nanostructures 18–20 . Composite type sensor using two or multiple oxide material in single or
Get PriceDirect Printing Synthesis of Self-Organized Copper Oxide
In this work the gas sensing properties of CuBi2O4 have been investigated toward various reducing gases (C2H5OH NH3 H2 CO and H2S) and oxidizing gas (NO2) for the first time.
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Sensory properties of hybrid composites based on poly(3 4
Apr 18 2015 · In this work we have prepared film sensor elements based on a hybrid system poly(3 4-ethylenedioxythiophene)-porous silicon nanocrystals-carbon nanotubes on flexible polymer substrates. Our FTIR spectroscopy-based studies for the molecular structure of the materials obtained suggest some interaction of their components in the hybrid layer. The influence of adsorption of water molecules on
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Synthesis characterization and enhanced gas sensing
In recent years spinel-type compounds have attracted great interest because of their gem-like qualities. However little is known of their gas sensing properties. We report in this paper on a self-assembly method to prepare porous ZnCo2O4 (ZCO) nano/microspheres by
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Study of n-WO3/p-porous silicon structures for gas-sensing
In this work we report on the gas sensing properties of n-WO3/p-porous silicon (PS) structures. Nanostructured WO3 films are deposited by simple chemical method via dip-coating of PS in tungsten hexachloride solution. The morphological and structural properties of the elaborated structures were investigated using Atomic Force Microscope (AFM) Raman and Fourier Transform Infrared (FTIR
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Electrospinning of mesoporous p-type In2O3/TiO2 composite
In this paper a series of loose and porous p-type In 2 O 3 /TiO 2 composite nanofibers (ITCN) has been synthesized via a facile synthesis using an electrospinning approach followed by an appropriate thermal treatment under ambient conditions. It was found that the ITCN with an In 2 O 3 composite content of 14.3 at (ITCN2) which had lots of loose pores (approximate size of 4–6 nm) in the
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A low-level acetone gas sensor based on n -type ZnO/ p
Jan 27 2021 · Today gas sensors offer a vital method to detect and monitor the level type and environmental information of various gases in order to guarantee the safety of life in modern civilization. In this regard the analysis of human breath components is one of the novel applications of analytic gas sensors to monitor the body s metabolism function which has received a lot of attention.
Get PriceCuBi2O4 Prepared by the Polymerized Complex Method for Gas
Apr 11 2018 · Gas sensing properties of p-type CuBi 2 O 4 porous nanoparticulate thin film prepared by solution process based on metal-organic decomposition. Sensors and Actuators B Chemical 2018 268 . DOI 10.1016/j.snb.2018.04.105.
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One-pot electrospinning and gas-sensing properties of
Using nanostructured composite materials is an effective way to obtain high-performance gas sensors. This work used p-type LaMnO3 perovskite-structured semiconductor as a novel promoter for SnO2 nanofibers and studied the gas-sensing characteristics. Nanofibers of 0–2.5-mol LaMnO3/SnO2 were synthesized via one-pot electrospinning. Compared with pristine SnO2 LaMnO3/SnO2 composite
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CO2 sensing properties of Zr-added porous CaFe2O4 powder
The gas sensing properties of Zr-added and pure CaFe 2 O 4 powders for CO 2 in air were examined in the temperature range of °C. The semiconductor-type gas sensor made from pure CaFe 2 O 4 powder showed a fairly good response to CO 2.Furthermore the addition of a small amount of Zr into CaFe 2 O 4 powder was found to be effective for enhancing the CO 2 response of the present gas
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SnO2 Nanostructure as Pollutant Gas Sensors Synthesis
The majority of n-type semiconductor charge carriers are electrons whereas the p-type is a positive hole. In SnO 2 charge carriers are electrons (including itself among the n-type semiconductors). In the sensing mechanism of metal oxide gas sensors oxygen
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Synthesis characterization and enhanced gas sensing
In recent years spinel-type compounds have attracted great interest because of their gem-like qualities. However little is known of their gas sensing properties. We report in this paper on a self-assembly method to prepare porous ZnCo2O4 (ZCO) nano/microspheres by
Get Price
