scholarly journals Enhanced Hydrogen Detection in ppb-Level by Electrospun SnO2-Loaded ZnO Nanofibers

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 726 ◽  
Author(s):  
Jae-Hyoung Lee ◽  
Jin-Young Kim ◽  
Jae-Hun Kim ◽  
Sang Kim
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Excellent Performance ◽  
Electrospinning Technique ◽  
Hydrogen Sensing ◽  
Working Temperature ◽  
Highly Sensitive ◽  
Zno Nanofibers

High-performance hydrogen sensors are important in many industries to effectively address safety concerns related to the production, delivering, storage and use of H2 gas. Herein, we present a highly sensitive hydrogen gas sensor based on SnO2-loaded ZnO nanofibers (NFs). The xSnO2-loaded (x = 0.05, 0.1 and 0.15) ZnO NFs were fabricated using an electrospinning technique followed by calcination at high temperature. Microscopic analyses demonstrated the formation of NFs with expected morphology and chemical composition. Hydrogen sensing studies were performed at various temperatures and the optimal working temperature was selected as 300 °C. The optimal gas sensor (0.1 SnO2 loaded ZnO NFs) not only showed a high response to 50 ppb hydrogen gas, but also showed an excellent selectivity to hydrogen gas. The excellent performance of the gas sensor to hydrogen gas was mainly related to the formation of SnO2-ZnO heterojunctions and the metallization effect of ZnO.

scholarly journals Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 902 ◽  
Author(s):  
Jae-Hyoung Lee ◽  
Jin-Young Kim ◽  
Ali Mirzaei ◽  
Hyoun Kim ◽  
Sang Kim
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
High Performance ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Electrospinning Technique ◽  
Calcination Process ◽  
Hydrogen Sensing ◽  
Zno Nanofibers ◽  
P Type

Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1−x)ZnO-xNiO (x = 0.03, 0.05, 0.7, 0.1, and 0.15 wt%), for hydrogen gas sensing experiments. Samples were prepared through the electrospinning technique followed by a calcination process. The sensing experiments showed that the sample with 0.05 wt% NiO loading resulted in the highest sensing performance at an optimal sensing temperature of 200 °C. The sensing mechanism is discussed in detail and contributions of the p-n heterojunctions, metallization of ZnO and catalytic effect of NiO on the sensing enhancements of an optimized gas sensor are analyzed. This study demonstrates the possibility of fabricating high-performance H2 sensors through the optimization of p-type metal oxide loading on the surfaces of n-type metal oxides.

scholarly journals Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

2018 ◽  
Author(s):  
Jae-Hyoung Lee ◽  
Jin-Young Kim ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Metal Oxide ◽  
Gas Sensors ◽  
High Performance ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Electrospinning Technique ◽  
Calcination Process ◽  
Hydrogen Sensing ◽  
Zno Nanofibers ◽  
P Type

Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1 − x) ZnO-xNiO (x = 0.03, 0.05, and 0.1 wt%), for hydrogen gas sensing experiments. Samples were prepared through the electrospinning technique followed by a calcination process. The sensing experiments showed that the sample with 0.05 wt% NiO loading resulted in the highest sensing performance at an optimal sensing temperature of 200 °C. The sensing mechanism is discussed in detail and contributions of the p-n heterojunctions, metallization of ZnO and catalytic effect of NiO on the sensing enhancements of an optimized gas sensor are analyzed. This study demonstrates the possibility of fabricating high-performance H2 sensors through the optimization of p-type metal oxide loading on the surfaces of n-type metal oxides.

scholarly journals Palladium-coated narrow groove plasmonic nanogratings for highly sensitive hydrogen sensing

RSC Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 4137-4147 ◽  
Author(s):  
Senthil Subramanian ◽  
Kamal Kumar ◽  
Anuj Dhawan
Keyword(s):  
Near Infrared ◽  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Hydrogen Sensing ◽  
Highly Sensitive ◽  
Infrared Wavelengths

In this paper, we propose novel plasmonic hydrogen sensors based on palladium coated narrow-groove plasmonic nanogratings for sensing of hydrogen gas at visible and near-infrared wavelengths.

Highly sensitive and selective hydrogen gas sensor using sputtered grown Pd decorated MnO2 nanowalls

2016 ◽  
Vol 234 ◽  
pp. 8-14 ◽  
Author(s):  
Amit Sanger ◽  
Ashwani Kumar ◽  
Arvind Kumar ◽  
Ramesh Chandra
Keyword(s):  
Gas Sensor ◽  
Hydrogen Gas ◽  
Highly Sensitive

Highly Sensitive Hydrogen Gas Sensor based on a MoS2-Pt Nanoparticle Composite

2020 ◽  
Vol 1 (1) ◽  
pp. Article ID 2020-0828-Article ID 2020-0828
Author(s):  
Sheng-Yuan Chu
Keyword(s):  
Gas Sensor ◽  
Hydrogen Gas ◽  
Pt Nanoparticle ◽  
Highly Sensitive
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