Template-free synthesis of vanadium sesquioxide (V2O3) nanosheets and their room-temperature sensing performance

2018 ◽  
Vol 6 (15) ◽  
pp. 6402-6413 ◽  
Author(s):  
Veena Mounasamy ◽  
Ganesh Kumar Mani ◽  
Dhivya Ponnusamy ◽  
Kazuyoshi Tsuchiya ◽  
Arun K. Prasad ◽  
...  
Keyword(s):  
Room Temperature ◽  
Single Step ◽  
Temperature Sensing ◽  
Glass Substrates ◽  
Ammonia Sensing ◽  
Vanadium Sesquioxide ◽  
Step Growth ◽  
Template Free ◽  
Sensing Performance

Single-step growth of V2O3 nanosheets on glass substrates has been established for room-temperature ammonia sensing.

scholarly journals Room-temperature sensing performance of hydrogen using palladium-based film by optical setup

2020 ◽  
Vol 50 (4) ◽  
Author(s):  
_ Yiyun Yao ◽  
Alain J. Corso ◽  
Marco Bazzan ◽  
Enrico Tessarolo ◽  
Zhanshan Wang ◽  
...  
Keyword(s):  
Lattice Constant ◽  
Room Temperature ◽  
Temperature Sensing ◽  
The Other ◽  
Hydrogen Atoms ◽  
Alloy Films ◽  
Sensitivity Loss ◽  
Interstitial Volume ◽  
Pt Alloy ◽  
Sensing Performance

H2 sensing performance of novel Pd–Pt alloy films has been compared with those obtained by using Pd films and H2-reducted PdO films. Two different detecting systems were used to measure the hydrogenation and de-hydrogenation phases with a H2 concentration of both 5% v/v nitrogen and 1% v/v nitrogen at room temperature. The sensitivity loss observed for the Pd–Pt alloy and H2-reducted PdO samples with respect to pure Pd samples can be explained in terms of the reduction in the lattice constant and interstitial volume due to the Pt addition, which determine a decrement of hydrogen atoms penetrating in the films. On the other hand, results show an improvement in time -response for Pd–Pt alloy and H2-reducted PdO films with respect to pure Pd ones, presumably due to the increase of its permeability to H2. Moreover, the sensing measurements repeated after 60 days show that the Pd–Pt alloy films, unlike the Pd-based ones, fully preserve their performances, demonstrating the advantage of the Pt inclusion for stability purposes when the samples are stored upon humidity.

Room temperature ammonia sensing of α-MoO3 nanorods grown on glass substrates

2021 ◽  
Vol 722 ◽  
pp. 138575
Author(s):  
Tijin Thomas ◽  
Nagabandi Jayababu ◽  
Julakanti Shruthi ◽  
Alex Mathew ◽  
Andrea Cerdán‑Pasarán ◽  
...  
Keyword(s):  
Room Temperature ◽  
Glass Substrates ◽  
Ammonia Sensing

Facile synthesis of an electrically conductive polycarbazole–zirconium(iv)phosphate cation exchange nanocomposite and its room temperature ammonia sensing performance

2015 ◽  
Vol 39 (9) ◽  
pp. 6882-6891 ◽  
Author(s):  
Umair Baig ◽  
Waseem A. Wani ◽  
Lee Ting Hun
Keyword(s):  
Cation Exchange ◽  
Room Temperature ◽  
Aqueous Ammonia ◽  
Facile Synthesis ◽  
Electrically Conductive ◽  
Ammonia Sensing ◽  
Sensing Performance

An electrically conductive polycarbazole–zirconium(iv)phosphate nanocomposite based sensor was fabricated for sensing aqueous ammonia at room temperature.

Hydrogen sensors based on Pt-decorated SnO2 nanorods with fast and sensitive room-temperature sensing performance

2019 ◽  
Vol 811 ◽  
pp. 152086 ◽  
Author(s):  
Zihui Chen ◽  
Keyang Hu ◽  
Piaoyun Yang ◽  
Xingxing Fu ◽  
Zhao Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Temperature Sensing ◽  
Hydrogen Sensors ◽  
Sno2 Nanorods ◽  
Sensing Performance

Selective recognition of hydrogen sulfide using template and catalyst free grown ZnO nanorods

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 54952-54962 ◽  
Author(s):  
Ganesh Kumar Mani ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Hydrogen Sulfide ◽  
Spray Pyrolysis ◽  
Room Temperature ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Single Step ◽  
Selective Recognition ◽  
Glass Substrates ◽  
Catalyst Free

A single step spray pyrolysis technique was used to grow ZnO nanorods on glass substrates without any template or catalyst and the nanorods were successfully employed to detect hydrogen sulfide at room temperature.

scholarly journals The effects of amino substituents on the enhanced ammonia sensing performance of PcCo/rGO hybrids

RSC Advances ◽  
2018 ◽  
Vol 8 (72) ◽  
pp. 41280-41287 ◽  
Author(s):  
Bin Wang ◽  
Xiaolin Wang ◽  
Xiaocheng Li ◽  
Zhijiang Guo ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Ammonia Gas ◽  
Ammonia Sensing ◽  
Highly Sensitive ◽  
Cost Efficient ◽  
Ammonia Gas Sensors ◽  
Sensing Performance

Three new room temperature reversible ammonia gas sensors were fabricated using PcCo/rGO hybrids with cost-efficient, highly sensitive and stable sensing performance.

scholarly journals Single Step Growth of Vertically Oriented Zinc Oxide Nanowire Using Thermal Evaporation

2021 ◽  
Vol 411 ◽  
pp. 25-36
Author(s):  
Dzetty Soraya Abdul Aziz ◽  
Samsudi Sakrani ◽  
Naziha Jamaludin
Keyword(s):  
Thermal Evaporation ◽  
Single Step ◽  
Zno Nanowires ◽  
Metal Catalyst ◽  
Visible Range ◽  
Thermal Evaporation Method ◽  
X Ray ◽  
Glass Substrates ◽  
Step Growth ◽  
Zinc Oxide Nanowire

Commonly, the synthesis of ZnO nanowires involves the use of metal catalyst via a non-direct step growth which contribute to the contamination on the final product. Thus, in this work we synthesized catalyst-free ZnO nanowires using a direct or single step growth of nanowires. Thermal evaporation method is used to synthesize ZnO nanowires on bare glass substrates with different distances between Zn powder and the substrates; on-top (1.2 cm), 16 cm and 18 cm. Field Emission Scanning Electron Microscopy images showed a vertically well-aligned with high density of ZnO nanowires were successfully synthesized via self-seeding process and the longest nanowires were produced at the shortest distance. Energy Dispersive X-ray and X-Ray Diffraction analyses confirmed that high purity of ZnO nanowires were obtained and ZnO (002) strongest and sharp peak was observed, indicating preferentially grown ZnO nanowires along the c-axis perpendicular to the substrates and leading towards single crystal structure. Four peaks were observed in visible range from Photoluminescence spectra (PL) which related to fundamental defects with the highest peak at 3.04 eV. The on-top sample with distance 1.2 cm from Zn powder has the lowest transmittance due to the high thickness of ZnO nanowires. The range of energy band gap for ZnO nanowires obtained from the extrapolation graph is in agreement with PL highest peak approximately 3.00 eV. Therefore, this direct or single step deposition method is of great interest since it has successfully produced ZnO nanowires with significant characteristics without employing the non-direct step growth.

Controllable synthesis of MoS2@MoO2 nanonetworks for enhanced NO2 room temperature sensing in air

Nanoscale ◽  
2019 ◽  
Vol 11 (17) ◽  
pp. 8554-8564 ◽  
Author(s):  
Muhammad Ikram ◽  
Lujia Liu ◽  
Yang Liu ◽  
Mohib Ullah ◽  
Laifeng Ma ◽  
...  
Keyword(s):  
Room Temperature ◽  
Temperature Sensing ◽  
Controllable Synthesis ◽  
Cvd Method ◽  
One Step ◽  
Sensing Performance

MoS2@MoO2 with controllable morphology fabricated via a one-step CVD method showed enhanced NO2 sensing performance at room temperature in air.

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