Cr-doped NiO nanoparticles as selective and stable gas sensor for ppb-level detection of benzyl mercaptan

Li, Peipei; Cao, Changyan; Shen, Qikai; Bai, Bo; Jin, Hongqiang; Yu, Jingkun; Chen, Wei-Ming; Song, Weiguo

doi:10.1016/j.snb.2021.129886

Cited by 59 publications

(22 citation statements)

References 40 publications

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“…However, it is also observed that the sensitivity decreases with an operating temperature of 180 °C. This may be due to various factors: (i) more adsorption of atmospheric oxygen O 2 and its conversion into active site O − can deplete the conduction path, which causes enhanced potential barrier height at the grain boundaries, (ii) unavailability of active sites O − , and (iii) the quick vaporization of acetone molecules and their cloud formation around the sensor surface at ambient temperature causes the slow sensitivity [ 44 , 45 , 46 , 47 ]. Figure 4 b displays the sensitivity plots of acetone sensing properties of the ZnS QDs sensor for all concentrations at three different working temperatures (100 °C, 150 °C, 200 °C).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, we assessed the selectivity coefficient ( C ) to quantify the acetone selectivity with respect to other gases, using the relation C = S acetone / S othergas [ 44 , 45 ]. The selectivity coefficient values of the ZnS QDs acetone sensor are 5.7 (ammonia), 4.3 (toluene), 3.5 (ethanol), 8.1 (butanol), 9.5 (formaldehyde), 4.1 (isopropanol), and 4.9 (benzene).…”

Section: Resultsmentioning

confidence: 99%

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ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

Mishra

Choi

et al. 2021

Micromachines

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This study reports the ZnS quantum dots (QDs) synthesis by a hot-injection method for acetone gas sensing applications. The prepared ZnS QDs were characterized by X-ray diffraction (XRD) and transmission electron microscopy analysis. The XRD result confirms the successful formation of the wurtzite phase of ZnS, with a size of ~5 nm. Transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and fast Fourier transform (FFT) images reveal the synthesis of agglomerated ZnS QDs with different sizes, with lattice spacing (0.31 nm) corresponding to (111) lattice plane. The ZnS QDs sensor reveals a high sensitivity (92.4%) and fast response and recovery time (5.5 s and 6.7 s, respectively) for 100 ppm acetone at 175 °C. In addition, the ZnS QDs sensor elucidates high acetone selectivity of 91.1% as compared with other intrusive gases such as ammonia (16.0%), toluene (21.1%), ethanol (26.3%), butanol (11.2%), formaldehyde (9.6%), isopropanol (22.3%), and benzene (18.7%) for 100 ppm acetone concentration at 175 °C. Furthermore, it depicts outstanding stability (89.1%) during thirty days, with five day intervals, for 100 ppm at an operating temperature of 175 °C. In addition, the ZnS QDs acetone sensor elucidates a theoretical detection limit of ~1.2 ppm at 175 °C. Therefore, ZnS QDs can be a promising and quick traceable sensor nanomaterial for acetone sensing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

Mishra

Choi

et al. 2021

Micromachines

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“…[ 18 ] In addition, designing and constructing nanomaterials with special morphology and nanostructure has also been a hot‐topic subject. The morphologies are originated from different dimensions, such as 0D nanoparticles with different sizes, [ 19 ] 1D structures (rods, [ 20 ] wires, [ 21 ] belts, [ 22 ] tubes, [ 23 ] etc. ), 2D structures (sheets, [ 24 ] disks, [ 25 ] flakes, [ 26 ] etc.)…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Nanostructured Sensing Materials from 0D to 3D: Overview of Structure–Property‐Application Relationship for Gas Sensors

2021

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Along with the progress of nanoscience and nanotechnology, nanomaterials with attractive structural and functional properties have gained more attention than ever before, especially in the field of electronic sensors. In recent years, the gas sensing devices have made great achievement and also created wide application prospects, which leads to a new wave of research for designing advanced sensing materials. There is no doubt that the characteristics are highly governed by the sensitive layers. For this reason, important advances for the outstanding, novel sensing materials with different dimensional structures including 0D, 1D, 2D, and 3D are reported and summarized systematically. The sensing materials cover noble metals, metal oxide semiconductors, carbon nanomaterials, metal dichalcogenides, g‐C3N4, MXenes, and complex composites. Discussion is also extended to the relation between sensing performances and their structure, electronic properties, and surface chemistry. In addition, some gas sensing related applications are also highlighted, including environment monitoring, breath analysis, food quality and safety, and flexible wearable electronics, from current situation and the facing challenges to the future research perspectives.

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“…2,3 In addition, making gas sensors exible can enable their integration into portable and wearable devices. 4,5 Metal oxides (MOXs), such as ZnO, [6][7][8] NiO, [9][10][11] Fe 2 O 3 , 12-14 and In 2 O 3 (ref. [15][16][17] have been widely used for detection of hazardous gases over the past few decades.…”

Section: Introductionmentioning

confidence: 99%

“…Metal oxides (MOXs), such as ZnO, 6–8 NiO, 9–11 Fe 2 O 3 , 12–14 and In 2 O 3 (ref. 15–17) have been widely used for detection of hazardous gases over the past few decades.…”

Section: Introductionmentioning

confidence: 99%

Ligand-assisted deposition of ultra-small Au nanodots on Fe₂O₃/reduced graphene oxide for flexible gas sensors

et al. 2022

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Cr-doped NiO nanoparticles as selective and stable gas sensor for ppb-level detection of benzyl mercaptan

Cited by 59 publications

References 40 publications

ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

Recent Progress of Nanostructured Sensing Materials from 0D to 3D: Overview of Structure–Property‐Application Relationship for Gas Sensors

Ligand-assisted deposition of ultra-small Au nanodots on Fe₂O₃/reduced graphene oxide for flexible gas sensors

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Cr-doped NiO nanoparticles as selective and stable gas sensor for ppb-level detection of benzyl mercaptan

Cited by 59 publications

References 40 publications

ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

ZnS Quantum Dot Based Acetone Sensor for Monitoring Health-Hazardous Gases in Indoor/Outdoor Environment

Recent Progress of Nanostructured Sensing Materials from 0D to 3D: Overview of Structure–Property‐Application Relationship for Gas Sensors

Ligand-assisted deposition of ultra-small Au nanodots on Fe2O3/reduced graphene oxide for flexible gas sensors

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Product

Resources

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Ligand-assisted deposition of ultra-small Au nanodots on Fe₂O₃/reduced graphene oxide for flexible gas sensors