Volatile Organic Compound Gas-Sensing Properties of Bimodal Porous α-Fe2O3 with Ultrahigh Sensitivity and Fast Response

2018 ◽  
Vol 10 (16) ◽  
pp. 13702-13711 ◽  
Author(s):  
Wangchang Geng ◽  
Shaobing Ge ◽  
Xiaowei He ◽  
Shan Zhang ◽  
Junwei Gu ◽  
...  
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Gas Sensing ◽  
Fast Response ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Volatile Organic ◽  
Ultrahigh Sensitivity

Synthesis and VOC gas sensing properties of Polypyrrole / MoO3 Nanohybrids

2003 ◽  
Vol 785 ◽  
Author(s):  
Kouta Hosono ◽  
Ichiro Matsubara ◽  
Norimitsu Murayama ◽  
Shin Woosuck ◽  
Noriya Izu
Keyword(s):  
Thin Films ◽  
Organic Compound ◽  
Volatile Organic Compound ◽  
Crystallographic Orientation ◽  
Electrical Resistance ◽  
Gas Sensing ◽  
Sodium Ions ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Volatile Organic

ABSTRACTWe have prepared polypyrrole (PPy) / MoO3 nanohybrid thin films and evaluated their volatile organic compound (VOC) gas sensing properties. The (PPy)xMoO3 thin films have been prepared by intercalation reactions of highly oriented MoO3 thin films. Intercalation of hydrated sodium ions successfully proceeded without loosing the crystallographic orientation. The (PPy)xMoO3 thin films was obtained by replacing the hydrated sodium ions with PPy. The (PPy)xMoO3 thin films can detect formaldehyde gas by increasing in their electrical resistance, whereas they showed no response to toluene.

Hydrothermally synthesized CuO based volatile organic compound gas sensor

RSC Advances ◽  
2014 ◽  
Vol 4 (101) ◽  
pp. 57975-57982 ◽  
Author(s):  
Shufeng Xia ◽  
Huichao Zhu ◽  
Haitao Cai ◽  
Jiaqi Zhang ◽  
Jun Yu ◽  
...  
Keyword(s):  
Organic Compound ◽  
Hydrothermal Method ◽  
Gas Sensor ◽  
Volatile Organic Compound ◽  
Single Phase ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Volatile Organic

In the present work, single-phase CuO particles were synthesized by a hydrothermal method and characterized by SEM, TEM and XRD. The gas sensing properties of the CuO based sensor to some representative flammable VOC gases were investigated.

Synthesis of Polypyrrole/MoO3Hybrid Thin Films and Their Volatile Organic Compound Gas-Sensing Properties

2005 ◽  
Vol 17 (2) ◽  
pp. 349-354 ◽  
Author(s):  
Kouta Hosono ◽  
Ichiro Matsubara ◽  
Norimitsu Murayama ◽  
Shin Woosuck ◽  
Noriya Izu
Keyword(s):  
Thin Films ◽  
Organic Compound ◽  
Volatile Organic Compound ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Volatile Organic

scholarly journals Recent Advances in Silicon FET Devices for Gas and Volatile Organic Compound Sensing

Chemosensors ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 260
Author(s):  
Anwesha Mukherjee ◽  
Yossi Rosenwaks
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Gas Sensing ◽  
Field Effect Transistors ◽  
Medical Diagnostics ◽  
Silicon On Insulator ◽  
Oxide Semiconductor ◽  
Ultra Low Power ◽  
Sensing Properties ◽  
Volatile Organic

Highly sensitive and selective gas and volatile organic compound (VOC) sensor platforms with fast response and recovery kinetics are in high demand for environmental health monitoring, industry, and medical diagnostics. Among the various categories of gas sensors studied to date, field effect transistors (FETs) have proved to be an extremely efficient platform due to their miniaturized form factor, high sensitivity, and ultra-low power consumption. Despite the advent of various kinds of new materials, silicon (Si) still enjoys the advantages of excellent and reproducible electronic properties and compatibility with complementary metal–oxide–semiconductor (CMOS) technologies for integrated multiplexing and signal processing. This review gives an overview of the recent developments in Si FETs for gas and VOC sensing. We categorised the Si FETs into Si nanowire (NW) FETs; planar Si FETs, in which the Si channel is either a part of the silicon on insulator (SOI) or the bulk Si, as in conventional FETs; and electrostatically formed nanowire (EFN) FETs. The review begins with a brief introduction, followed by a description of the Si NW FET gas and VOC sensors. A brief description of the various fabrication strategies of Si NWs and the several functionalisation methods to improve the sensing performances of Si NWs are also provided. Although Si NW FETs have excellent sensing properties, they are far from practical realisation due to the extensive fabrication procedures involved, along with other issues that are critically assessed briefly. Then, we describe planar Si FET sensors, which are much closer to real-world implementation. Their simpler device architecture combined with excellent sensing properties enable them as an efficient platform for gas sensing. The third category, the EFN FET sensors, proved to be another potential platform for gas sensing due to their intriguing properties, which are elaborated in detail. Finally, the challenges and future opportunities for gas sensing are addressed.

Fabrication of Hierarchical SnO2 Nanocrystals and their Sensing Properties to Volatile Organic Compound Vapors

2011 ◽  
Vol 266 ◽  
pp. 1-4 ◽  
Author(s):  
De Liang Chen ◽  
Tao Li ◽  
Li Yin ◽  
Rui Zhang ◽  
Xin Jian Li
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Gas Sensing ◽  
Sno2 Nanostructures ◽  
X Ray Diffraction ◽  
Hierarchical Microstructure ◽  
X Ray ◽  
Sensing Properties ◽  
Volatile Organic ◽  
Sensing Performance

Hierarchical SnO2 (H-SnO2) and particulate SnO2 (P-SnO2) nanostructures were synthesized by a hydrothermal method with and without the aid of sodium 1-dodecanesulfonate (SDS), respectively. X-ray diffraction and scanning electron microscopy were used to characterize the products obtained. The sensing properties of the H-SnO2 and P-SnO2 nanostructures to volatile organic compound gas (VOCs) were measured. The H-SnO2 sensors show better gas-sensing performance than the P-SnO2 sensors due to the hierarchical microstructure.

scholarly journals MOFs-Derived Porous NiFe2O4 Nano-Octahedrons with Hollow Interiors for an Excellent Toluene Gas Sensor

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1059 ◽  
Author(s):  
Yanlin Zhang ◽  
Chaowei Jia ◽  
Qiuyue Wang ◽  
Quan Kong ◽  
Gang Chen ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Metal Organic Framework ◽  
Fast Response ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Metal Organic ◽  
Response And Recovery ◽  
Nife2o4 Nanoparticles ◽  
Gas Molecules ◽  
Ppm Level

Toluene is extensively used in many industrial products, which needs to be effectively detected by sensitive gas sensors even at low-ppm-level concentrations. Here, NiFe2O4 nano-octahedrons were calcinated from NiFe-bimetallic metal-organic framework (MOFs) octahedrons synthesized by a facile refluxing method. The co-existence of p-Phthalic acid (PTA) and 3,3-diaminobenzidine (DAB) promotes the formation of smooth NiFe-bimetallic MOFs octahedrons. After subsequent thermal treatment, a big weight loss (about 85%) transformed NiFe2O4 nanoparticles (30 nm) into NiFe2O4 porous nano-octahedrons with hollow interiors. The NiFe2O4 nano-octahedron based sensor exhibited excellent gas sensing properties for toluene with a nice stability, fast response, and recovery time (25 s/40 s to 100 ppm toluene), and a lower detection limitation (1 ppm) at 260 °C. The excellent toluene-sensing properties can not only be derived from the hollow interiors combined with porous nano-octahedrons to favor the diffusion of gas molecules, but also from the efficient catalytic activity of NiFe2O4 nanoparticles.

Improved gas sensing properties of silver-functionalized ZnSnO3 hollow nanocubes

2018 ◽  
Vol 5 (9) ◽  
pp. 2123-2131 ◽  
Author(s):  
YanYang Yin ◽  
Feng Li ◽  
Nan Zhang ◽  
Shengping Ruan ◽  
Haifeng Zhang ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensing ◽  
Fast Response ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Response And Recovery ◽  
Porous Silver ◽  
Acetone Detection

Porous silver-functionalized ZnSnO3 hollow nanocubes as a gas sensor with an ultra-fast response and recovery speed for acetone detection.

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