Defect engineering on SnO2 nanomaterials for enhanced gas sensing performances

Xiong, Ya; Lin, Yingbin; Wang, Xinzhen; Zhao, Yi

doi:10.1016/j.apmate.2022.02.001

Cited by 36 publications

(38 citation statements)

References 154 publications

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“…Their activity can be further improved by modulating the atomic structure. In particular, defect engineering modulates the surface electronic structure through local electrons redistribution, so that defective electrode materials expose enriched, unsaturated coordination sites . As one of the typical defects, oxygen vacancies (OVs) demonstrated a promising effect in anchoring polysulfides and promoting sulfur redox reactions …”

Section: Tmcs In Li–s Batteriesmentioning

confidence: 99%

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Wang

et al. 2022

ACS Nano

154

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Because of their high energy density, low cost, and environmental friendliness, lithium−sulfur (Li−S) batteries are one of the potential candidates for the next-generation energy-storage devices. However, they have been troubled by sluggish reaction kinetics for the insoluble Li 2 S product and capacity degradation because of the severe shuttle effect of polysulfides. These problems have been overcome by introducing transition metal compounds (TMCs) as catalysts into the interlayer of modified separator or sulfur host. This review first introduces the mechanism of sulfur redox reactions. The methods for studying TMC catalysts in Li−S batteries are provided. Then, the recent advances of TMCs (such as metal oxides, metal sulfides, metal selenides, metal nitrides, metal phosphides, metal carbides, metal borides, and heterostructures) as catalysts and some helpful design and modulation strategies in Li−S batteries are highlighted and summarized. At last, future opportunities toward TMC catalysts in Li−S batteries are presented.

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Section: Tmcs In Li–s Batteriesmentioning

confidence: 99%

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Wang

et al. 2022

ACS Nano

154

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“…), chemical reduction, customising specially exposed crystal facets, and addition of foreign atoms (donor doping and acceptor doping). 67,68 These defects enhance the surface reactivity to gas molecules and provide appropriate materials for gas sensing. 68,69 The SEM images of the as-grown GaN nanowires and GaN nanorods with three rows can be seen in Fig.…”

Section: Ternary Group III Nitride Layers (Ingan Algan and Alinn)mentioning

confidence: 99%

Recent progress on group III nitride nanostructure-based gas sensors

et al. 2022

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“…To optimize the electrode structure, some studies have found that the fabrication of a layer of response materials on a collector with a 3D hierarchical structure by the construction of a continuous conductive matrix, mass diffusion channels, and large surface area is a powerful route to strengthen the detection signal for electrochemical sensing devices. − This strategy was able to avoid the drawbacks of the planar electrodes and was accompanied by a remarkably enhanced charge conductivity and an abundance of exposed active sites. In contrast, similarly to the organic molecular imprinting (MI) technology in polymer matrices, a straightforward inorganic-framework MI approach is proposed to treat the inorganic catalytic materials, which could induce a specific high affinity between the electrode surface and target molecule (molecular template) by creating selective recognition sites that efficiently memorize the molecular template’s size, morphology, and functional groups. − This method may offer an efficient and simple approach for improving sensitivity and selectivity of response materials, although the relevant mechanism is not clear .…”

Section: Introductionmentioning

confidence: 99%

Plasma-Assisted Fabrication of Molecularly Imprinted NiAl-LDH Layer on Ni Nanorod Arrays for Glyphosate Detection

Zhao

Yan

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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An inorganic-framework molecularly imprinted NiAl layered double hydroxide (MI-NiAl-LDH) with specific template molecule (glyphosate pesticide, Glyp) recognition ability was prepared on Ni nanorod arrays (Ni NRAs) through electrodeposition followed by a low-temperature O2 plasma treatment. The freestanding Ni/MI-NiAl-LDH NRA electrode had highly enhanced sensitivity and selectivity. The electrocatalytic oxidation of Glyp was proposed to occur at Ni3+ centers in MI-NiAl-LDH, and the current response depended linearly on the Glyp concentration from 10.0 nmol/L to 1.0 μmol/L (R 2 = 0.9906), with the limit of detection (LOD) being 3.1 nmol/L (S/N = 3). An exceptional discriminating capability with tolerance for other similar organophosphorus compounds was achieved. Molecular imprinting (N and P residues) affected the electronic structure of NiAl-LDH, triggering the formation of highly active NiOOH sites at relatively lower anodic potentials and substantially enhancing the electrocatalytic oxidation ability of the NiAl-LDH interface toward the C–N bonds in Glyp. In combination with the surface enrichment effect of MI-NiAl-LDH toward template molecules, the electrochemical oxidation signal intensity of Glyp increased significantly, with a greater peak separation from interfering molecules. These results challenge the common belief that the excellent performance of inorganic-framework molecularly imprinted interfaces arises from their specific adsorption of template molecules, providing new insight into the development of high-performance organic-pollutant-sensing electrodes.

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Defect engineering on SnO2 nanomaterials for enhanced gas sensing performances

Cited by 36 publications

References 154 publications

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Recent progress on group III nitride nanostructure-based gas sensors

Plasma-Assisted Fabrication of Molecularly Imprinted NiAl-LDH Layer on Ni Nanorod Arrays for Glyphosate Detection

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