Superfast and efficient hydrogen gas sensor using PdAualloy@ZnO core–shell nanoparticles

2020 ◽  
Vol 8 (26) ◽  
pp. 12968-12974 ◽  
Author(s):  
Hu-Jun Le ◽  
Dung Van Dao ◽  
Yeon-Tae Yu
Keyword(s):  
Gas Sensor ◽  
Sensory System ◽  
Hydrogen Gas ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Hydrogen Detection ◽  
System P ◽  
Core Shell Nanoparticles ◽  
Catalytic Effects

PdAualloy@ZnO CSNPs are prepared and evaluated for hydrogen detection with superior behavior with respect to pure ZnO. Improvement is attributed to .synergistically catalytic effects between Pd, Au and ZnO in PdAualloy@ZnO core–shell sensory system

scholarly journals Correction: Superfast and efficient hydrogen gas sensor using PdAualloy@ZnO core–shell nanoparticles

2020 ◽  
Vol 8 (33) ◽  
pp. 17276-17276
Author(s):  
Hu-Jun Lee ◽  
Dung Van Dao ◽  
Yeon-Tae Yu
Keyword(s):  
Gas Sensor ◽  
Hydrogen Gas ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Correction for ‘Superfast and efficient hydrogen gas sensor using PdAualloy@ZnO core–shell nanoparticles’ by Hu-Jun Lee et al., J. Mater. Chem. A, 2020, 8, 12968–12974, DOI: 10.1039/D0TA03552A.

Au@Cu2O core–shell nanoparticles as chemiresistors for gas sensor applications: effect of potential barrier modulation on the sensing performance

Nanoscale ◽  
2014 ◽  
Vol 6 (1) ◽  
pp. 581-588 ◽  
Author(s):  
Prabhakar Rai ◽  
Rizwan Khan ◽  
Sudarsan Raj ◽  
Sanjit Manohar Majhi ◽  
Kyung-Kuen Park ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Potential Barrier ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Sensor Applications ◽  
Core Shell Nanoparticles ◽  
Sensing Performance

Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles

2021 ◽  
Vol 587 ◽  
pp. 252-259
Author(s):  
Thuy T.D. Nguyen ◽  
Dung Van Dao ◽  
Dong-Seog Kim ◽  
Hu-Jun Lee ◽  
Sang-Yeob Oh ◽  
...  
Keyword(s):  
Surface Area ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Sensing Performance

scholarly journals Colorimetric Visualization Using Polymeric Core–Shell Nanoparticles: Enhanced Sensitivity for Formaldehyde Gas Sensors

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 998 ◽  
Author(s):  
Jae Jung Park ◽  
Yongsoo Kim ◽  
Chanmin Lee ◽  
Jun-Won Kook ◽  
Donghyun Kim ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Colorimetric Sensor ◽  
Gas Detection ◽  
Core Shell ◽  
Bromocresol Purple ◽  
Sensor Systems ◽  
Shell Nanoparticles ◽  
Colorimetric Response ◽  
Core Shell Nanoparticles ◽  
Colorimetric Sensors

Although equipment-based gas sensor systems (e.g., high-performance liquid chromatography) have been widely applied for formaldehyde gas detection, pre-treatment and expensive instrumentation are required. To overcome these disadvantages, we developed a colorimetric sensor based on polymer-based core–shell nanoparticles (PCSNPs), which are inexpensive, stable, and exhibit enhanced selectivity. Spherical and uniform poly(styrene-co-maleic anhydride) (PSMA)/polyethyleneimine (PEI) core–shell nanoparticles were prepared and then impregnated with Methyl Red (MR), Bromocresol Purple (BCP), or 4-nitrophenol (4-NP) to construct colorimetric sensors for formaldehyde gas. The intrinsic properties of these dyes were maintained when introduced into the PCSNPs. In the presence of formaldehyde, the MR, BCP, and 4-NP colorimetric sensors changed to yellow, red, and gray, respectively. The colorimetric response was maximized at a PEI/PSMA ratio of four, likely owing to the high content of amine groups. Effective formaldehyde gas detection was achieved at a relative humidity of 30% using the MR colorimetric sensor, which exhibited a large color change (92%) in 1 min. Advantageously, this stable sensor allowed sensitive and rapid naked-eye detection of low formaldehyde concentrations (0.5 ppm). Hence, this approach is promising for real-time formaldehyde gas visualization and can also be adapted to other colorimetric gas sensor systems to improve sensitivity and simplicity.

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