Radial ZnO Nanorods Decorating Co3O4 Nanoparticles for Highly Selective and Sensitive Detection of 3-Hydroxy-2-Butanone Biomarker

Nanoscale ◽  
2021 ◽  
Author(s):  
Chen Wang ◽  
Lingling Du ◽  
Xiaxia Xing ◽  
Dongliang Feng ◽  
Yingying Tian ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Gas Sensor ◽  
Zno Nanorods ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Co3o4 Nanoparticles

Indirectly monitoring Listeria monocytogenes (LMs) via gas sensor detecting metabolites 3-hydroxy-2-butanone (3H-2B) biomarker is a newly-emerged strategy. However, such sensors are required to simultaneously endow with outstanding selectivity, high sensitivity...

Fabrication of Room Temperature Resistive Ethanol Gas Sensor Based on ZnO Nanorods Decorated with PbS Nanoparticles

2020 ◽  
Vol 65 ◽  
pp. 145-155
Author(s):  
Hadi Riyahi Madvar ◽  
Zoheir Kordrostami ◽  
Samaneh Hamedi
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Printed Circuit Board ◽  
Gas Sensing ◽  
Zno Nanorods ◽  
Test Chamber ◽  
High Sensitivity ◽  
Circuit Board ◽  
Sensitive Material ◽  
Pbs Nanoparticles

A resistive ethanol gas sensor with a high sensitivity has been proposed. The fabricated gas sensor has a very promising response and recovery at room temperature. The proposed sensor has been fabricated by depositing sensitive nanostructured material on printed circuit board interdigitated electrodes. As the sensitive material, ZnO nanorods of high uniformity have been synthesized by hydrothermal method and then decorated by PbS nanoparticles. The synthesized decorated nanorods were characterized by X-ray diffraction and scanning electron microscope which confirmed the formation of the desired nanostructures. The ethanol gas sensing properties of the ZnO nanorods decorated with PdS nanoparticles was measured in a test chamber. The minimum ethanol concentration detected by the sensor has been 10 ppm. The results showed the higher sensitivity of the proposed sensor to the ethanol at room temperature compared to similar works.

scholarly journals Mesoporous ZnO@Co3O4 Nanosphere for Sensitive Detection of 3-Hydroxy-2-Butanone

2021 ◽  
Author(s):  
Xinxin Tian ◽  
Ming Yin ◽  
Li Zhang ◽  
Tianyi Qiu ◽  
Dongpo Xu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensor ◽  
Synthesis Method ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Mesoporous Zno

Abstract The mixed semiconductor metal oxides as the gas sensor can enhance the sensitivity compared with the metal oxide respectively. In this study, the mesoporous ZnO@Co3O4 nanosphere was prepared through the simple hydrothermal synthesis method of ZIF-L-Zn@Co, the cage construction of mesoporous ZnO@Co3O4 nanosphere was remained unchanged after the calcination of the ZIF-L-Zn@Co at 600℃ for 2 h in the air. The mesoporous ZnO@Co3O4 nanosphere was selected as the gas sensor for the detection of 3-Hydroxy-2-Butanone. Compared with the ZnO and Co3O4 respectively, the mesoporous ZnO@Co3O4 nanosphere as the gas sensor shows the high sensitivity, selectivity and stability.

scholarly journals Highly sensitive detection of nitrobenzene by a series of fluorescent 2D zinc(ii) metal–organic frameworks with a flexible triangular ligand

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 23975-23984
Author(s):  
Xue Yang ◽  
Yixia Ren ◽  
Hongmei Chai ◽  
Xiufang Hou ◽  
Zhixiang Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Organic Frameworks ◽  
High Sensitivity ◽  
Fluorescent Sensors ◽  
Sensitive Detection ◽  
Donor Ligands ◽  
Highly Sensitive ◽  
Metal Organic ◽  
Highly Sensitive Detection

Four fluorescent 2D Zn-MOFs based on a flexible triangular ligand and linear N-donor ligands are hydrothermally prepared and used to detect nitrobenzene in aqueous solution with high sensitivity, demonstrating their potential as fluorescent sensors.

Highly sensitive detection of Cr(vi) in groundwater by bimetallic NiFe nanoparticles

2017 ◽  
Vol 9 (6) ◽  
pp. 1031-1037 ◽  
Author(s):  
Jingtao Liu ◽  
Yu Ding ◽  
Lifei Ji ◽  
Xin Zhang ◽  
Fengchun Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Low Cost ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Toxic Heavy Metal ◽  
Metal Pollutants ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Heavy Metal Pollutants

Hexavalent chromium (Cr(vi)) is one of the most toxic heavy metal pollutants in groundwater, and thus the detection of Cr(vi) with high sensitivity, accuracy, and simplicity and low cost is of great importance.

Promising methane gas sensor synthesized by microwave-assisted Co3O4 nanoparticles

2016 ◽  
Vol 46 ◽  
pp. 1-5 ◽  
Author(s):  
N.M. Shaalan ◽  
M. Rashad ◽  
A.H. Moharram ◽  
M.A. Abdel-Rahim
Keyword(s):  
Gas Sensor ◽  
Co3o4 Nanoparticles ◽  
Methane Gas ◽  
Microwave Assisted

Effect of Operating Temperature on Characteristics of Single-Walled Carbon Nanotubes Gas Sensor

2005 ◽  
Vol 486-487 ◽  
pp. 485-488 ◽  
Author(s):  
Hong Quang Nguyen ◽  
Mai Van Trinh ◽  
Jeung Soo Huh
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensor ◽  
Gas Adsorption ◽  
Operating Temperature ◽  
High Sensitivity ◽  
Single Walled Carbon Nanotubes ◽  
Fast Response ◽  
Carrier Gas ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The effect of operating temperature on characteristics of single-walled carbon nanotubes (SWNT) based gas sensor was investigated. SWNT-based sensor was fabricated from SWNT powder (Iljin Nanotech, Korea) by screen-printing method. SWNT powder (30 mg, AP grade) was dispersed into 0.78 gram a-terpineol (Aldrich) by ultrasonic vibration for 1 hour then stirred manually for 1 hour to increase adhesion. From this condensed solution, a thick film of SWNT was printed onto alumina substrates. The film then was sintered at 300oC for 2 hours to remove residual impurities. Upon exposure to some gases such as nitrogen, ammonia or nitric oxide, resistance of the sensor dramatically changes due to gas adsorption. In our experiments, SWNT-based sensor was employed to detect NH3 gas in N2 ambience. After saturated of N2, the sensor exposes to NH3 with various concentrations (from 5 ppm to 100 ppm, diluted by N2 as carrier gas). This sensor exhibits a fast response, high sensitivity but slow recovery at room temperature. By heating at high temperature and increasing the flow-rate of carrier gas, NH3 gas desorbs easily and recovery of the sensor improved. The heating also influenced the characteristics of sensors such as response and reproducibility. Other special changes in electric property of SWNT-based sensor caused by heating are also discussed.

Porous ZnO/rGO Nanosheet‐Based NO 2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature

2021 ◽  
pp. 2101511
Author(s):  
Ziwei Chen ◽  
Haojie Guo ◽  
Fusheng Zhang ◽  
Xiaowen Li ◽  
Jiabing Yu ◽  
...  
Keyword(s):  
Detection Limit ◽  
Gas Sensor ◽  
Room Temperature ◽  
High Sensitivity
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