Synthesis and characterization of different dopant (Ge, Nd, W)-doped ZnO nanorods and their CO2 gas sensing applications

Çolak, Hakan; Karaköse, Ercan

doi:10.1016/j.snb.2019.126629

Cited by 44 publications

(27 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Indeed, both physical adsorption and chemisorption appear to take place at the metal-oxide interface, and the reduction of CO

into CO

may not be the only mechanism involved [ 157 ]. That being said, the following reaction is often considered in the absence of a more satisfactory alternative [ 159 , 160 , 161 ]:

wherein ads stands for adsorbed , lat for lattice , and the O

radicals and

are supposed to come from the MO lattice—where M may be Zn or Cu, for instance. Overall, despite the use of metal oxide CO

sensors by an important number of authors, few of them propose an explicit sensing scheme, and even fewer mind using equilibrated or justified schemes, which may lead to incoherences.…”

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

“…The resulting expected behavior would be an increase in the metal oxide resistance with an increase in pCO

. While this assertion seems to hold in the simple ZnO case [ 160 , 162 , 163 ], opposite behaviors were observed when doping ZnO with lanthanum [ 164 ] or calcium/aluminium [ 165 , 166 ]. Consequently, we believe that further research is needed to gain a deeper insight into the working principle of thin-film metal oxide sensors.…”

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Dervieux¹,

Théron

Uhring

2021

Sensors

View full text Add to dashboard Cite

Carbon dioxide (CO2) monitoring in human subjects is of crucial importance in medical practice. Transcutaneous monitors based on the Stow-Severinghaus electrode make a good alternative to the painful and risky arterial “blood gases” sampling. Yet, such monitors are not only expensive, but also bulky and continuously drifting, requiring frequent recalibrations by trained medical staff. Aiming at finding alternatives, the full panel of CO2 measurement techniques is thoroughly reviewed. The physicochemical working principle of each sensing technique is given, as well as some typical merit criteria, advantages, and drawbacks. An overview of the main CO2 monitoring methods and sites routinely used in clinical practice is also provided, revealing their constraints and specificities. The reviewed CO2 sensing techniques are then evaluated in view of the latter clinical constraints and transcutaneous sensing coupled to a dye-based fluorescence CO2 sensing seems to offer the best potential for the development of a future non-invasive clinical CO2 monitor.

show abstract

“…Indeed, both physical adsorption and chemisorption appear to take place at the metal-oxide interface, and the reduction of CO

into CO

may not be the only mechanism involved [ 157 ]. That being said, the following reaction is often considered in the absence of a more satisfactory alternative [ 159 , 160 , 161 ]:

wherein ads stands for adsorbed , lat for lattice , and the O

radicals and

are supposed to come from the MO lattice—where M may be Zn or Cu, for instance. Overall, despite the use of metal oxide CO

sensors by an important number of authors, few of them propose an explicit sensing scheme, and even fewer mind using equilibrated or justified schemes, which may lead to incoherences.…”

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

“…The resulting expected behavior would be an increase in the metal oxide resistance with an increase in pCO

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Dervieux¹,

Théron

Uhring

2021

Sensors

View full text Add to dashboard Cite

show abstract

“…It is known to all that the intrinsic semiconductor gas-sensing materials have the disadvantages of poor gas response, high operating temperature, and long response-recovery time owing to the inherent defects of semiconductors [10,11]. Thus, a large number of researches about using various synthetic techniques to control the surface morphology of sensing materials have been reported [12,13,14]. Moreover, extensive studies have been devoted to the optimization of gas sensor performances by doping method [15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Superior Hydrogen Sensing Property of Porous NiO/SnO2 Nanofibers Synthesized via Carbonization

Liu

Wang

et al. 2019

Nanomaterials

View full text Add to dashboard Cite

In this paper, the porous NiO/SnO2 nanofibers were synthesized via the electrospinning method along with the carbonization process. The characterization results show that the pristine SnO2-based nanofibers can form porous structure with different grain size by carbonization. The hydrogen gas-sensing investigations indicate that the NiO/SnO2 sensor exhibits more prominent sensing properties than those of pure SnO2 sensor devices. Such enhanced performance is mainly attributed to the porous nanostructure, which can provide large active adsorption sites for surface reaction. Moreover, the existence of p-n heterojunctions between NiO and SnO2 also plays a key role in enhancing gas-sensing performances. Finally, the H2 sensing mechanism based on the NiO/SnO2 nanocomposite was proposed for developing high-performance gas sensor devices.

show abstract

“…were synthesized by using the mechanochemical combustion method. The doped ZnO nanorods were found to be more sensitive than the undoped-ZnO under an air atmosphere [ 94 ]. Owing to the inclusion of Na doping, the surface of plane ZnO film turned to a wrinkle network having granular structure.…”

Section: Greenhosue Gas Sensorsmentioning

confidence: 99%

Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

Gautam¹,

Sharma²,

Tyagi³

et al. 2021

R. Soc. open sci.

View full text Add to dashboard Cite

Climate change and global warming have been two massive concerns for the scientific community during the last few decades. Anthropogenic emissions of greenhouse gases (GHGs) have greatly amplified the level of greenhouse gases in the Earth's atmosphere which results in the gradual heating of the atmosphere. The precise measurement and reliable quantification of GHGs emission in the environment are of the utmost priority for the study of climate change. The detection of GHGs such as carbon dioxide, methane, nitrous oxide and ozone is the first and foremost step in finding the solution to manage and reduce the concentration of these gases in the Earth's atmosphere. The nanostructured metal oxide semiconductor (NMOS) based technologies for sensing GHGs emission have been found most reliable and accurate. Owing to their fascinating structural and morphological properties metal oxide semiconductors become an important class of materials for GHGs emission sensing technology. In this review article, the current concentration of GHGs in the Earth's environment, dominant sources of anthropogenic emissions of these gases and consequently their possible impacts on human life have been described briefly. Further, the different available technologies for GHG sensors along with their principle of operation have been largely discussed. The advantages and disadvantages of each sensor technology have also been highlighted. In particular, this article presents a comprehensive study on the development of various NMOS-based GHGs sensors and their performance analysis in order to establish a strong detection technology for the anthropogenic GHGs. In the last, the scope for improved sensitivity, selectivity and response time for these sensors, their future trends and outlook for researchers are suggested in the conclusion of this article.

show abstract

Synthesis and characterization of different dopant (Ge, Nd, W)-doped ZnO nanorods and their CO2 gas sensing applications

Cited by 44 publications

References 33 publications

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Superior Hydrogen Sensing Property of Porous NiO/SnO2 Nanofibers Synthesized via Carbonization

Nanostructured metal oxide semiconductor-based sensors for greenhouse gas detection: progress and challenges

Contact Info

Product

Resources

About