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Improved H2S gas sensing properties of ZnO nanorods via ...

ZnO nanorodbased device recovers not more than 5% of the base value and reaches a new baseline. This irrecoverable responseof ZnOnanorodbaseddeviceoughttobeattributed to the irreversible chemical reaction between H 2S and the ZnO nanorod,15,16 in which ZnS is formed on the surface. To prevent the reaction between ZnO and H 2S, we modi ed the asgrown ZnO nanorods with chemical inactive …


ADesigned ZnOZIF8 Core–Shell Nanorod Film as aGas Sensor ...

and synthesized aZnOZIF8 core–shell nanorod film as aH2 gas sensor through afacile solution deposition method, as shown in Scheme 1. By finetuning the reactionconditions, the ZnOZIF8 core–shell nanorod film with athin, finegrain, porousZIF8 shell is obtained, whichrealizes the selective response for H2 over CO and enhances the H2 sensitivity. Results and Discussion Formation and ...


Cedoped ZnO nanorods based low operation temperature …

20140801· There is no literature reporting Cedoped ZnO nanorod based gas sensors according to our survey. In this study, we try to develop low operation temperature NO 2 sensors by growing the Cedoped ZnO nanorods on the Al 2 O 3 substrates with Pt spiral and interdigitated electrodes. We investigated the effects of surface texture, Ce content, and electrode geometry on the surface chemistry and gas ...


Novel hydrogen gas sensor based on single ZnO nanorod ...

20081101· A sensitivity of ∼4% was obtained for a single ZnO nanorod hydrogen sensor at 200 ppm H 2 in the air at room temperature. The nanosensor has a high selectivity for H 2, since its sensitivity for O 2, CH 4, CO, ethanol or LPG are less than %.


ZnO nanorod gas sensor for ethanol detection ScienceDirect

20120220· The ZnO nanorods were then used to construct a gas sensor for ethanol detection at different operating temperature. The asprepared ZnO nanorod gas sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a gas sensor to detect ethanol.


(PDF) Fabrication of ZnO nanorods for NO2 sensor ...

Many research Z1 Top of the nanorod 30 ers have focused on gas sensor based on nanostructured ZnO and Z2 Top of the nanorod 60 typical examples for ZnO based gas sensor are summarized as fol Z3 Top of the nanorod 120 Z4 Bottom of the nanorod 60 low. Hsueh et al. fabricated ZnO nanowires by chemical vapor 198 S. Öztürk et al. / Journal of Alloys and Compounds …


Amorphous Pdassisted H2 detection of ZnO nanorod gas ...

Keywords: Amorphous palladium, ZnO nanorod, Hydrogen, Gas sensor 1. Introduction Fuel cells, which are operated by hydrogen (H 2) gas, have been highlighted as a promising energy devices [1,2]. Unfortunately, the flammability of H 2 in air at concentrations higher than 4 % is a considerable safety issue [3]. In this regard, a gas sensor that can detect small amounts of H 2 should be developed ...


Zinc Oxide Nanorods as H2S Gas Sensor

Gas sensing properties of zinc oxide thick films were studied forH 2 S, LPG and NH 3 gases by changing the concentration of test gases. The prepared zinc oxide thick films can be used as promising material for semiconductor gas sensor for poisonous gases like H 2 S with high sensitivity. Keywords: zinc oxide nanorods, thick film, H2S gas sensor ...


ZnO nanorod gas sensor for ethanol detection | Semantic ...

The asprepared ZnO nanorod gas sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a gas sensor to detect ethanol. Abstract ZnO nanorods were fabricated by a simple lowtemperature hydrothermal process in high yield (about 85%), starting with Zn(OH) 4 2− aqueous solution in the presence of CTAB, the CTAB serving as a structure director ...


Zinc Oxide Nanorods as H2S Gas Sensor Semantic Scholar

The zinc oxide nanorods have been synthesized and studied as the sensing element for the detection of H2S gas. The zinc oxide nanorods were synthesized by precipitation method. The thick films of synthesized material were prepared by screen printing method on glass substrate. Gas sensing properties of zinc oxide thick films were studied forH2S, LPG and NH3 gases by changing the …


Mechanism Study of ZnO NanorodBundle Sensors for H2S Gas ...

The response of ZnO nanorodbundle sensors to H2S gas increased with Ts; this trend may be due to chemical reaction of nanorods with gas molecules. Xray photoelectron spectroscopy results indicated that the sensing mechanism of the ZnO nanorodbundle sensor was explained by both the wellknown surface reaction between H2S and adsorbed oxygen on ZnO, and the formation of zinc−sulfur bonding ...


Heterostructured NiO/ZnO nanorod arrays with significantly ...

H2S gas sensors were fabricated using pn heterojunctions of NiO/ZnO, in which the ZnO nanorod arrays were wrapped with nickel oxide (NiO) nanosheets via a hydrothermal synthesis method. When the H2S gas molecules were adsorbed and then oxidized on the surfaces ZnO, the free electrons will be released. The increase of electron concentration on the ZnO boosts the transport speeds of electrons ...


Enhanced H2S gas sensing properties of Mn doped ZnO ...

20190405· These results indicate that the sensor made on the Mndoped ZnO based NPs exhibits great selectivity for H 2 S. Based on the experimental results, it is understood that the ZnO based sensors gas sensing mechanism is mainly attributed to the change of impedance caused by the adsorption and desorption of analyte gas on the surface of the materials.


H2, H2S gas sensing properties of rGO/GaN nanorods at room ...

20180701· GaN NRs were cleaned in accentone, rinsed with deionized water and blow with N 2 Gas. The rGO was spin coated on GaN NRs with different rpm (1000, 3000, and 5000) for 1 min (min) followed by baking at 100 °C for 15 min on the hot plate and the procedure was repeated two times. Fabrication of gas sensor and measurements of sensing properties


Fabrication of ZnO nanorods based gas sensor pattern by ...

20210501· In this paper, mainly focused on the fabrication of ZnO nanorod based gas sensor. This sensor was aimed to detect a small amount of volatile organic compounds (VOCs) with low power, low cost and simple manufacturing method. Low power consumption is achievable by completion of metal oxide sensors. So, high sensitivity of sensor is requested to sense the target gas. It is important to …


Mechanism Study of ZnO NanorodBundle Sensors for H2S Gas ...

The response of ZnO nanorodbundle sensors to H2S gas increased with Ts; this trend may be due to chemical reaction of nanorods with gas molecules. Xray photoelectron spectroscopy results indicated that the sensing mechanism of the ZnO nanorodbundle sensor was explained by both the wellknown surface reaction between H2S and adsorbed oxygen on ZnO, and the formation of zinc sulfur bonding …


Room temperature H2S gas sensor based on rather aligned ...

20150201· Hydrogen sulfide is a poisonous, corrosive and flammable gas which is usually found in crude petroleum, coal, oil and natural gas industries. Its short term (10 min) and long term (8 h) threshold limits are 15 and 10 ppm, respectively. Thus, real time detection in the concentration range (<15 ppm) is the most important for the human health safety , . Zinc oxide (ZnO) has been widely ...


Electrodeposition of ZnO nanorods onto GaN towards ...

20190625· As shown in Fig. 3a, rather vertically aligned ZnO NRs were displayed in SEM image. The diameter of ZnO NRs varies from 220 nm to 650 nm. ZnO NRs form a porous network consisting of directional channels for gas diffusion in and out [].TEM image of a single nanorod was displayed in Fig. 3b. The top of flattened ZnO NRs was observed because of the etching effect during growth [].


Sensitive, Selective, and Fast Detection of ppbLevel H2S ...

ppbLevel H2S Gas Boosted by ZnOCuO Mesocrystal Yanan Guo1*, Miaomiao Gong1,2, Yushu Li1, Yunling Liu3 and Xincun Dou1* Abstract ZnOCuO mesocrystal was prepared via topotactic transformation using onestep direct annealing of aqueous precursor solution and assembled into a H 2S sensor. The ZnOCuO mesocrystalbased sensor possesses good linearity and high sensitivity in the …


[PDF] Heterostructured NiO/ZnO Nanorod Arrays with ...

H2S gas sensors were fabricated using pn heterojunctions of NiO/ZnO, in which the ZnO nanorod arrays were wrapped with NiO nanosheets via a hydrothermal synthesis method. When the H2S gas molecules were adsorbed and then oxidized on the ZnO surfaces, the free electrons were released. The increase in the electron concentration on the ZnO boosts the transport speed of the electrons on both ...


Amorphous Pdassisted H2 detection of ZnO nanorod gas ...

Amorphous Pdassisted H2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stability. Article ID Journal Published Year Pages File Type; 7140625: Sensors and Actuators B: Chemical: 2018: 33 Pages: PDF: Abstract. For monitoring H2 concentrations in air, diverse resistive gas sensors have been demonstrated. In particular, Pddecorated metal oxides have shown remarkable ...


Gas sensors on zinc oxide nanostructures | FreebookSummary

The nanorod sensor shows a higher sensitivity than the ZnO film based sensor prepared by ultrasonic spray pyrolysis. The enhanced sensitivity is attributed to the higher aspect ratio of the nanorod structure and the sensitivity increases with the length of the nanorod. The relative response of the sensor is linearly proportional to NO2 concentration in the 0.


Detection of H2S down to ppb levels at room temperature ...

20060117· ZnO sensors were fabricated from ZnO nanorods prepared by a hydrothermal method and their gassensing properties were investigated. It was found that the phase composition of the product and the gassensing properties were dependent on the preparation conditions (the presence of surfactant and the ratio of V ZnA c 2 ( M) / V NaOH ( M)).The sensor prepared at a ratio of V ZnA c 2 …


(PDF) Fabrication of ZnO nanorodbased hydrogen gas ...

Conclusion For gas sensing characterizations, the fabricated single In summary, an insitu liftout technique has been ZnO branched nanorod sensor were placed in a 1000 cm3 presented to fabricate single ZnO branched nanorod H2 Author''s personal copy ARTICLE IN PRESS O. Lupan et al. / Microelectronics Journal 38 (2007) 1211–1216 1215 Fig. 4. The room temperature relative response …