scholarly journals NG.5 - Two-Dimensional Titanium Oxide Nanosheets for NO2 Gas Sensing at Room Temperature

2018 ◽  
Author(s):  
M. Shafiei ◽  
H. Khan ◽  
W. Wlodarski ◽  
Y. Li ◽  
D. Ye ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Two Dimensional

Two-dimensional NiO nanosheets with enhanced room temperature NO2sensing performance via Al doping

2017 ◽  
Vol 19 (29) ◽  
pp. 19043-19049 ◽  
Author(s):  
Shuai Wang ◽  
Da Huang ◽  
Shusheng Xu ◽  
Wenkai Jiang ◽  
Tao Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Two Dimensional ◽  
Al Doping ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Nio Nanosheets

Defects caused by Al3+doping significantly affect the gas-sensing properties of NiO nanosheets.

2D/2D/2D Ti3C2Tx@TiO2@MoS2 Heterostructure as Ultrafast and High-sensitivity NO2 Gas Sensor at Room-temperature

2022 ◽  
Author(s):  
Zhuo Liu ◽  
He Lv ◽  
Ying Xie ◽  
Jue Wang ◽  
Jiahui Fan ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
2D Materials ◽  
High Sensitivity ◽  
Two Dimensional ◽  
No2 Gas Sensor ◽  
2D Structure ◽  
Sensing Application

The very diverse two-dimensional (2D) materials have bloomed in NO2 gas sensing application that provide new opportunities and challenges in function oriented gas sensors. In this work, a 2D/2D/2D structure...

scholarly journals Room temperature and high response ethanol sensor based on two dimensional hybrid nanostructures of WS2/GONRs

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hassan Ahmadvand ◽  
Azam Iraji zad ◽  
Raheleh Mohammadpour ◽  
Seyed Hossein Hosseini-Shokouh ◽  
Elham Asadian
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Xrd Analysis ◽  
High Response ◽  
Hybrid Nanostructures ◽  
Molar Ratio ◽  
Two Dimensional ◽  
X Ray ◽  
Bending Radius ◽  
Gas Response

Abstract Here in this research, room temperature ethanol and humidity sensors were prepared based on two dimensional (2D) hybrid nanostructures of tungsten di-sulfide (WS2) nanosheets and graphene oxide nanoribbons (GONRs) as GOWS. The characterization results based on scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (ESD), Raman spectroscopy and X-ray diffraction (XRD) analysis confirmed the hybrid formations. Ethanol sensing of drop-casted GOWS films on SiO2 substrate indicated increasing in gas response up to 5 and 55 times higher compared to pristine GONRs and WS2 films respectively. The sensing performance of GOWS hybrid nanostructures was investigated in different concentrations of WS2, and the highest response was about 126.5 at 1 ppm of ethanol in 40% relative humidity (R.H.) for WS2/GONRs molar ratio of 10. Flexibility of GOWS was studied on Kapton substrate with bending radius of 1 cm, and the gas response decreased less than 10% after 30th bending cycles. The high response and flexibility of the sensors inspired that GOWS are promising materials for fabrication of wearable gas sensing devices.

Facile Synthesis of Hierarchical CuO Microspheres and their Gas Sensing Properties for NOx at Room Temperature

2015 ◽  
Vol 68 (10) ◽  
pp. 1569 ◽  
Author(s):  
Wanzhen Song ◽  
Hongyuan Wu ◽  
Jingchao Wang ◽  
Yufei Lin ◽  
Jiabao Song ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Gas Diffusion ◽  
Two Dimensional ◽  
Facile Synthesis ◽  
Short Response Time ◽  
Gas Sensing Properties ◽  
Gas Response ◽  
Cuo Microspheres ◽  
Unique Hierarchical Structure

In this research, hierarchical CuO microspheres have been successfully synthesised by a facile reflux method. Scanning electron microscopy results clearly revealed that the hierarchical CuO microspheres were composed of two-dimensional nanosheets. The morphology of the prepared products could be tailored by changing the precursor concentration. The CuO-2 sample shows a higher NOx gas sensing performance with a low detection limit of 0.97 ppm, high gas response of 64.93 %, and short response time of 5.33 s to 97.0 ppm NOx at room temperature. The CuO-2 sensor also presents good selectivity and stability. The significantly improved gas response was concluded to be related to the well aligned microstructures and the improved conductivity of the CuO-2 sample. The unique hierarchical structure allows effective and rapid gas diffusion towards the sensing surfaces. In addition, the sensing mechanism based on the hierarchical CuO microspheres is discussed.

scholarly journals Hydrothermally derived p-n MoS2-ZnO from p-p MoS2-ZIF-8 for efficient detection of NO2 at room temperature

2021 ◽  
Author(s):  
Muhammad Ikram ◽  
He Lv ◽  
Zhuo Liu ◽  
Keying Shi ◽  
Yongxiang Gao
Keyword(s):  
Energy Storage ◽  
Transition Metals ◽  
Room Temperature ◽  
Gas Sensing ◽  
Two Dimensional ◽  
Research Attention ◽  
The Poor ◽  
Efficient Detection ◽  
Poor Stability

Two-dimensional transition metals dichalcogenide (2D-TMDs), and semiconductors metals oxides (MOs) have triggered enormous research attention in the field of energy storage, catalysis, and gas sensing. However, the poor stability of...

Room Temperature Gas Sensing of Two-Dimensional Titanium Carbide (MXene)

2017 ◽  
Vol 9 (42) ◽  
pp. 37184-37190 ◽  
Author(s):  
Eunji Lee ◽  
Armin VahidMohammadi ◽  
Barton C. Prorok ◽  
Young Soo Yoon ◽  
Majid Beidaghi ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Room Temperature ◽  
Gas Sensing ◽  
Two Dimensional

scholarly journals NO gas sensing at room temperature using single titanium oxide nanodot sensors created by atomic force microscopy nanolithography

2016 ◽  
Vol 7 ◽  
pp. 1044-1051 ◽  
Author(s):  
Li-Yang Hong ◽  
Heh-Nan Lin
Keyword(s):  
Atomic Force Microscopy ◽  
Metal Oxide ◽  
Titanium Oxide ◽  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
Force Microscopy ◽  
Atomic Force ◽  
Single Metal Oxide ◽  
Contact Electrodes

In this work, the fabrication of single titanium oxide nanodot (ND) resistive sensors for NO gas sensing at room temperature is reported. Two atomic force microscopy nanolithography methods, nanomachining and nano-oxidation, are employed. A single titanium nanowire (NW) is created first along with contact electrodes and a single titanium oxide ND is subsequently produced in the NW. Gas sensing is realized by the photo-activation and the photo-recovery approaches. It is found that a sensor with a smaller ND has better performance than a larger one. A response of 31%, a response time of 91 s, and a recovery time of 184 s have been achieved at a concentration of 10 ppm for a ND with a size of around 80 nm. The present work demonstrates the potential application of single metal oxide NDs for gas sensing with a performance that is comparable with that of metal oxide nanowire gas sensors.

An ultra-sensitive gas sensor based on two-dimensional manganese porphyrin monolayer

2021 ◽  
Author(s):  
Ze-Wen Hao ◽  
Mi-Mi Dong ◽  
Rui Qin Zhang ◽  
Chuankui Wang ◽  
Xiaoxiao Fu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Room Temperature ◽  
Gas Sensing ◽  
Environmental Safety ◽  
Low Power Consumption ◽  
Two Dimensional ◽  
Manganese Porphyrin ◽  
Highly Sensitive ◽  
Important Solution

The development of highly sensitive, low-power consumption, stable and recyclable gas sensing devices at room temperature has become an important solution for the environmental safety detection. Utilizing two-dimensional metalloporphyrin monolayer...

scholarly journals Preparation and Gas Sensing Properties of PANI/SnO2 Hybrid Material

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1360
Author(s):  
Qiaohua Feng ◽  
Huanhuan Zhang ◽  
Yunbo Shi ◽  
Xiaoyu Yu ◽  
Guangdong Lan
Keyword(s):  
Hybrid Material ◽  
Room Temperature ◽  
Tin Dioxide ◽  
Gas Adsorption ◽  
Gas Sensing ◽  
Oxidative Polymerization ◽  
Environmental Pollutants ◽  
Decomposition Temperature ◽  
Benzene Vapor ◽  
Thermo Gravimetric Analyzer

A sensor operating at room temperature has low power consumption and is beneficial for the detection of environmental pollutants such as ammonia and benzene vapor. In this study, polyaniline (PANI) is made from aniline under acidic conditions by chemical oxidative polymerization and doped with tin dioxide (SnO2) at a specific percentage. The PANI/SnO2 hybrid material obtained is then ground at room temperature. The results of scanning electron microscopy show that the prepared powder comprises nanoscale particles and has good dispersibility, which is conducive to gas adsorption. The thermal decomposition temperature of the powder and its stability are measured using a differential thermo gravimetric analyzer. At 20 °C, the ammonia gas and benzene vapor gas sensing of the PANI/SnO2 hybrid material was tested at concentrations of between 1 and 7 ppm of ammonia and between 0.4 and 90 ppm of benzene vapor. The tests show that the response sensitivities to ammonia and benzene vapor are essentially linear. The sensing mechanisms of the PANI/SnO2 hybrid material to ammonia and benzene vapors were analyzed. The results demonstrate that doped SnO2 significantly affects the sensitivity, response time, and recovery time of the PANI material.

Synergistic effects of SnO2 and Au nanoparticles decorated on WS2 nanosheets for flexible, room-temperature CO gas sensing

2021 ◽  
Vol 332 ◽  
pp. 129493
Author(s):  
Jae-Hun Kim ◽  
Jin-Young Kim ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim
Keyword(s):  
Room Temperature ◽  
Au Nanoparticles ◽  
Gas Sensing ◽  
Synergistic Effects ◽  
Ws2 Nanosheets ◽  
Co Gas
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