Ultra-long Zn 2 SnO 4 -ZnO microwires based gas sensor for hydrogen detection

Fan, Hong Jin; Xu, Shucong; Cao, Xianmin; Liu, Daoxi; Yin, Yaoyu; Hao, Haiyong; Wei, Dezhou; Shen, Yanbai

doi:10.1016/j.apsusc.2016.12.221

Cited by 34 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, some studies have found that specific surface area, electrical conductivity, and surface oxygen vacancies have become important factors to determine the performance of ZnO humidity sensors [17]. However, the existing ZnO has a low specific surface area and electron mobility and lack of hydrophilic functional groups on its surface, which severely limits its development in the field of humidity sensors [18,19]. Thus, the synthesis of ZnO with rich oxygen vacancies, hydrophilic functional groups, high specific surface area, and high electron mobility has become one of the key problems in humidity sensors [20].…”

Section: Introductionmentioning

confidence: 99%

Effects of pH on High-Performance ZnO Resistive Humidity Sensors Using One-Step Synthesis

Zhang

et al. 2019

Sensors

View full text Add to dashboard Cite

In this paper, we prepared a high-performance zinc oxide (ZnO) humidity sensor in an alkaline environment using one-step hydrothermal method. Experiments showed that the pH value of the precursor solution affects the performance of ZnO humidity sensors. There are abundant hydroxyl group and oxygen vacancies on the surface of ZnO with a precursor pH value of 10. Abundant hydroxyl groups on the surface of ZnO can adsorb a large number of water molecules and rich oxygen vacancies can accelerate the decomposition of water molecules, thus increasing the number of conductive ions (H3O+) and further improving the performance of the sensor. So, such a ZnO humidity sensor exhibited high sensitivity (14,415), good linearity, small hysteresis (0.9%), fast response/recovery time (31/15 s) in the range from 11% to 95% relative humidity (RH). Moreover, the ZnO-2 humidity sensor has good repeatability and can be effectively used for a long time. This study provides a new idea for the development of low-cost, high-performance and reusable ZnO resistive humidity sensors.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of pH on High-Performance ZnO Resistive Humidity Sensors Using One-Step Synthesis

Zhang

et al. 2019

Sensors

View full text Add to dashboard Cite

show abstract

“…5a, the sensor shows a stable baseline when measured in air. After it is exposed to hydrogen at a working temperature above 200 o C, the hydrogen molecules are absorbed and reacted with the oxygen species of O − on the surfaces of In2O3 to release free electrons (see chemical reaction equation (5)) [36]. Generation of free electrons causes the decrease of the sensor's resistance.…”

Section: Structural and Morphological Characteristics Of Mesoporous Imentioning

confidence: 99%

“…When the metal oxides are exposed to hydrogen, the hydrogen molecules will react with those chemisorbed oxygen species to form H2O, thus releasing electrons as 3 summarized in the chemical reactions of (4) or (5) at a working temperature either blow or above 100 o C [36], respectively. These processes will cause decreases of the resistance of the gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen gas sensor based on mesoporous In2O3 with fast response/recovery and ppb level detection limit

Yan

et al. 2018

International Journal of Hydrogen Energy

117

View full text Add to dashboard Cite

2018) Hydrogen gas sensor based on mesoporous In2O3 with fast response/recovery and ppb level detection limit. International Journal of Hydrogen Energy, 43 (50). AbstractHydrogen gas sensors were fabricated using mesoporous In2O3 synthesized using hydrothermal reaction and calcination processes. Their best performance for the hydrogen detection was found at a working temperature of 260 o C with a high response of 18.0 toward 500 ppm hydrogen, fast response/recovery times (e.g. 1.7 s/1.5 s for 500 ppm hydrogen), and a low detection limit down to 10 ppb. Using air as the carrier gas, the mesoporous In2O3 sensors exhibited good reversibility and repeatability towards hydrogen gas. They also showed a good selectivity for hydrogen compared to other commonly investigated gases including NH3, CO, ethyl alcohol, ethyl acetate, styrene, CH2Cl2 and formaldehyde. In addition, the sensors showed good long-term stability. The good sensing performance of these hydrogen sensors is attributed to the formation of mesoporous structures, large specific surface areas and numerous chemisorbed oxygen ions on the surfaces of the mesoporous In2O3.

show abstract

“…MOS (metal oxide semiconductor) sensors which are surface-modified with different sensitive materials can detect different gases [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ], such as carbon monoxide, sulfur dioxide, hydrogen sulfide, ammonia, and so on. Therefore, MOS sensors have become important environmental gas detectors and have attracted the attention of many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a large number of research papers on various MOS detectors have been reported. Nicoletti S and other research teams [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] have developed MOS gas detectors using nanocomposites as sensitive materials. Tomer V and other research teams [ 16 , 17 ] demonstrated MOS sensors with high performance that were doped with Ag or other catalytic materials.…”

Section: Introductionmentioning

confidence: 99%

A Mini-System Integrated with Metal-Oxide-Semiconductor Sensor and Micro-Packed Gas Chromatographic Column

et al. 2018

View full text Add to dashboard Cite

In this work, a mini monitoring system integrated with a microfabricated metal oxide array sensor and a micro packed gas chromatographic (GC) column was developed for monitoring environmental gases. The microfabricated packed GC column with a 1.6 m length was used to separate the environmental gas, and the metal oxide semiconductor (MOS) array sensor, fabricated with nano-sized SnO-SnO2 sensitive materials, was able to effectively detect each component separated by GC column. The results demonstrate that the monitoring system can detect environmental gas with high precision.

show abstract

Ultra-long Zn 2 SnO 4 -ZnO microwires based gas sensor for hydrogen detection

Cited by 34 publications

References 37 publications

Effects of pH on High-Performance ZnO Resistive Humidity Sensors Using One-Step Synthesis

Effects of pH on High-Performance ZnO Resistive Humidity Sensors Using One-Step Synthesis

Hydrogen gas sensor based on mesoporous In2O3 with fast response/recovery and ppb level detection limit

A Mini-System Integrated with Metal-Oxide-Semiconductor Sensor and Micro-Packed Gas Chromatographic Column

Contact Info

Product

Resources

About