Humidity sensing properties of SrTiO3 nanospheres with high sensitivity and rapid response

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22879-22883 ◽  
Author(s):  
Dongmei Li ◽  
Jingjing Zhang ◽  
Liang Shen ◽  
Wei Dong ◽  
Caihui Feng ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Rapid Response ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Response And Recovery ◽  
First Time ◽  
Humidity Sensing Properties

SrTiO3 Nanospheres were employed for the first time to detect humidity and showed ultrafast response and recovery speeds.

Humidity sensing properties of spray deposited Fe doped TiO2 thin film

2021 ◽  
Vol 42 (12) ◽  
pp. 122805
Author(s):  
Dipak L Gapale ◽  
Pranav P. Bardapurkar ◽  
Sandeep A. Arote ◽  
Sanjaykumar Dalvi ◽  
Prashant Baviskar ◽  
...  
Keyword(s):  
Spray Pyrolysis Technique ◽  
Structural Parameters ◽  
Texture Coefficient ◽  
Volume Percentage ◽  
Humidity Sensing ◽  
X Ray ◽  
Sensing Properties ◽  
Dislocation Densities ◽  
Response And Recovery ◽  
Humidity Sensing Properties

Abstract In the present work, ferrite (Fe) doped TiO2 thin films with different volume percentage (vol%) were synthesized using a spray pyrolysis technique. The effect of Fe doping on structural properties such as crystallite size, texture coefficient, microstrain, dislocation densities etc. were evaluated from the X ray diffratometry (XRD) data. XRD data revealed a polycrystalline anatase TiO2 phase for sample synthesized up to 2 vol% and mixed anatase and rutile crystalline phase for sample synthesized at 4 vol% Fe doped TiO2. The crystalline size was observed to decrease with increase in Fe dopant vol% and also other structural parameters changes with Fe dopant percentage. In the present work, electrical resistance was observed to decrease with a rise in Fe dopant vol% and temperature of the sample. Thermal properties like temperature coefficient of resistance and activation energy also showed strong correlation with Fe dopant vol%. Humidity sensing properties of the synthesized sample altered with a change in Fe dopant vol%. In the present paper, maximum sensitivity of about 88.7% for the sample synthesized with 2 vol% Fe doped TiO2 and also the lowest response and recovery time of about 52 and 3 s were reported for the same sample.

Humidity-Sensing Properties of Ag0Nanoparticles Supported on WO3-SiO2with Super Rapid Response and Excellent Stability

2015 ◽  
Vol 2015 (31) ◽  
pp. 5232-5240 ◽  
Author(s):  
Vijay K. Tomer ◽  
Surender Duhan ◽  
Ashok K. Sharma ◽  
Ritu Malik ◽  
Suman Jangra ◽  
...  
Keyword(s):  
Rapid Response ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Humidity Sensing Properties ◽  
Excellent Stability

The combinations of hollow MoS2 micro@nano-spheres: one-step synthesis, excellent photocatalytic and humidity sensing properties

2014 ◽  
Vol 2 (27) ◽  
pp. 5422-5430 ◽  
Author(s):  
Yinghua Tan ◽  
Ke Yu ◽  
Ting Yang ◽  
Qingfeng Zhang ◽  
Weitao Cong ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Sensitivity ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Excellent Photocatalytic Activity ◽  
One Step ◽  
Humidity Sensing Properties

Hollow MoS2 micro@nano-spheres were successfully fabricated. The MoS2 nanostructures showed excellent photocatalytic activity and high sensitivity at high RH.

Synthesis of LiCl Doped Hollow TiO2 Nanofibers via Electrospinning and Their Humidity-Sensing Properties

2012 ◽  
Vol 476-478 ◽  
pp. 1116-1120
Author(s):  
Hui Min Huang ◽  
Jie Yu ◽  
Ce Wang
Keyword(s):  
Electron Microscopy ◽  
X Ray Diffraction ◽  
Hollow Nanofibers ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Transmission Electron ◽  
Response And Recovery ◽  
Doped Titania ◽  
The Relationship ◽  
Humidity Sensing Properties

LiCl doped titania (TiO2) hollow nanofibers were prepared by using polylactide (PLA) nanofibers as templates. The morphology and crystal structure of the TiO2hollow nanofibers were characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The as-prepared LiCl doped TiO2hollow nanofibers exhibited a good humidity-sensing property. During the relative humidity (50%-95%) measurement, the response and recovery time is about 3 and 4 s, separately, with good linearity. The relationship between the humidity-sensing properties and the structure of the hollow nanofibers was also discussed. These distinguished and sensitive sensing performances make this material a good candidate in fabricating humidity sensors.

scholarly journals AC Humidity Sensing Properties of Mesoporous K2CO3-SiO2Composite Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Liang Guo ◽  
Xuefeng Chu ◽  
Xiaohong Gao ◽  
Chao Wang ◽  
Yaodan Chi ◽  
...  
Keyword(s):  
Composite Material ◽  
Mesoporous Silica ◽  
Complex Impedance ◽  
Ion Transfer ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Response And Recovery ◽  
Humidity Range ◽  
Humidity Sensing Properties

The mesoporous silica SBA-15 and mesoporous K2CO3-SiO2composite material were synthesized. Characterization of microstructure and morphology of materials indicated that the composite material had saved the porous framework of mesoporous silica SBA-15. Humidity sensing properties of different inverse proportion K2CO3-SiO2composite material were studied and we found that the sample with 0.16 g/g K2CO3exhibited excellent linearity in the wide humidity range. The complex impedance changed five orders of magnitude from 11% RH to 95% RH. The rapid response and recovery time were 10 s and 38 s, respectively. Finally a feasible ion transfer mechanism was brought forward to explain the sensing mechanism.

HUMIDITY SENSITIVE CHARACTERISTICS OF CARBOXYLATION CARBON NANOTUBES MODIFIED WITH LiClO4

2004 ◽  
Vol 01 (01) ◽  
pp. 33-38
Author(s):  
XINGJIU HUANG ◽  
YUFENG SUN ◽  
LIANCHAO WANG ◽  
FANLI MENG ◽  
JINHUAI LIU
Keyword(s):  
Carbon Nanotubes ◽  
High Sensitivity ◽  
Sensing Element ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Carboxylate Groups ◽  
Sensitivity And Selectivity ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Humidity Sensing Properties

In this paper, the humidity sensing properties of multi-walled carbon nanotubes modified with LiClO 4 was investigated. FTIR spectra showed that the ends of carbon nanotubes purified with nitric acid was opened and saturated with carboxylic acid groups and carboxylate groups. For comparison, the humidity sensing characteristics of four elements, MnWO 4 (Hubnerite), BaTiO 3 (Perovskite), NiWO 4 (Huberite), ZnCr 2 O 4 (Spinel) were discussed. Experimental data showed that LiClO 4/ MWNTs element exhibited excellent humidity sensing properties, that is, the response time can reach 7 min, the recovery time within 1 min and its sensitivity up to 35 000. Also, it was found that a small increase in resistance of pure MWNTs disappeared during the first few minutes after exposure to water by modifying with LiClO 4. The static and dynamic measurements showed that WMNTs / LiClO 4 sensing element exhibited high sensitivity and selectivity to water vapor.

scholarly journals Humidity-Sensing Properties of Ag0 Nanoparticles Supported on WO3 -SiO2 with Super Rapid Response and Excellent Stability

2019 ◽  
Vol 2019 (45) ◽  
pp. 4862-4862
Author(s):  
Vijay K. Tomer ◽  
Surender Duhan ◽  
Ashok K. Sharma ◽  
Ritu Malik ◽  
Suman Jangra ◽  
...  
Keyword(s):  
Rapid Response ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Humidity Sensing Properties ◽  
Excellent Stability
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