Increasing the reactive sites of ZnO nanoparticles by Li doping for ethanol sensing

Mariammal, R. N.; Ramachandran, K.

doi:10.1088/2053-1591/aae559

Cited by 13 publications

(8 citation statements)

References 38 publications

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“…is an effective method for enhancing sensing capability of about two orders of magnitude with respect to the undoped samples [ 33 ]. The substituted atoms can act as reactive sites for gas adsorption [ 34 ] and can cause extrinsic electronic states [ 35 , 36 ].…”

Section: Conductometric Type Sensors: Building Basics and Sensing mentioning

confidence: 99%

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Fazio

Spadaro

Corsaro

et al. 2021

Sensors

132

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Pure, mixed and doped metal oxides (MOX) have attracted great interest for the development of electrical and electrochemical sensors since they are cheaper, faster, easier to operate and capable of online analysis and real-time identification. This review focuses on highly sensitive chemoresistive type sensors based on doped-SnO2, RhO, ZnO-Ca, Smx-CoFe2−xO4 semiconductors used to detect toxic gases (H2, CO, NO2) and volatile organic compounds (VOCs) (e.g., acetone, ethanol) in monitoring of gaseous markers in the breath of patients with specific pathologies and for environmental pollution control. Interesting results about the monitoring of biochemical substances as dopamine, epinephrine, serotonin and glucose have been also reported using electrochemical sensors based on hybrid MOX nanocomposite modified glassy carbon and screen-printed carbon electrodes. The fundamental sensing mechanisms and commercial limitations of the MOX-based electrical and electrochemical sensors are discussed providing research directions to bridge the existing gap between new sensing concepts and real-world analytical applications.

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Section: Conductometric Type Sensors: Building Basics and Sensing mentioning

confidence: 99%

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Fazio

Spadaro

Corsaro

et al. 2021

Sensors

132

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show abstract

“…An initial decrease in the peak intensity of Peak 1 (UV peak) is noticed with an increased concentration of Li. Mariammal et al recommended an indirect enrichment of the Zn i defect within the ZnO lattice with the enhancement of Li content in it [93]. Figure 6 shows that the intensity of peak 3 around 425 nm remains almost unchanged up to 8 mol% Li.…”

Section: Pl Spectroscopy Studiesmentioning

confidence: 97%

Structural, optical, and antibacterial properties of Li-doped ZnO nanoparticles synthesized in water: evidence of incorporation of interstitial Li

Mukherjee¹,

Pramanik²,

Das³

et al. 2022

Phys. Scr.

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The mode of incorporation of lithium (Li) (as substitution or interstitial position) in zinc oxide (ZnO) has its own importance as far as the potential applications of Li-doped ZnO nanoparticles (NPs) are concerned. Fabrication of p-type ZnO based semiconductors as well as defect engineering based applications demand substitution of Zn2+ by Li+. However, doping of ZnO by Li with interstitial positions can play an important role in controlling the different properties of it. In the present study, we report the successful doping of Li in ZnO NPs up to a Li concentration of 10 mol% employing a simple wet chemical precipitation method in water. Up to a Li concentration of 8 mol%, doping by substitution of Li to the Zn sites have been observed. However, for 10 mol% of Li concentration, doping by incorporation of interstitial sites in addition to the substitution have been confirmed through the complementary characterization techniques. The effects of interstitial Li in ZnO on structural, optical, and antimicrobial properties have been studied in details systematically. For all the cases (structural, optical, and antimicrobial), the properties of Li-doped ZnO NPs have been changed reversibly in the ZnO NPs after incorporation of interstitial sites by Li as compared to the substitution of Li. For example, the microstrain, band gap, and antimicrobial activity have been found to increase with increase in Li concentration up to 8 mol%. However, the microstrain, band gap, and antimicrobial activity are found the decrease for 10 mol% of Li as compared to 8 mol% of Li. This study indicated that the different properties of Li-doped ZnO NPs can be controlled suitably as per the requirements for the practical applications of ZnO based materials.

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“…This is due to their porous structure that offers more active sites for ethanol absorption. 110 The analytical range is between 0 and 500 ppm. However, the spectral response was rather small from the provided data, and any changes in background and scattered light may interfere.…”

Section: Analytical Chemistrymentioning

confidence: 99%

“…Chunk-shaped Li-doped ZnO nanoparticles showed enhanced sensitivity toward ethanol vapor compared with that of ZnO nanoparticles. This is due to their porous structure that offers more active sites for ethanol absorption . The analytical range is between 0 and 500 ppm.…”

Section: Sensors For (Dissolved) Gases and Vaporsmentioning

confidence: 99%

Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

2019

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Increasing the reactive sites of ZnO nanoparticles by Li doping for ethanol sensing

Cited by 13 publications

References 38 publications

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Structural, optical, and antibacterial properties of Li-doped ZnO nanoparticles synthesized in water: evidence of incorporation of interstitial Li

Fiber-Optic Chemical Sensors and Biosensors (2015–2019)

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