Constructing porous ZnO/SnO2 nanocomposites for the detection of methane at low operating temperature

Han, Liuyang; Zhang, Saisai; Zhang, Bowen; Zhang, Bo; Bala, Hari; Zhang, Zhanying

doi:10.1007/s10934-021-01162-5

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…Thus, the gas level can be determined by detecting carbon monoxide. Various devices have been utilized for CO detection, including surface acoustic waves, optical gas sensors, electrochemical gas sensors, and metal oxide gas sensors . Among these, metal oxide semiconductor (MOS) sensors have gained widespread use for gas sensing due to their high sensitivity, excellent stability, and ease of fabrication …”

Section: Introductionmentioning

confidence: 99%

“…Various devices have been utilized for CO detection, including surface acoustic waves, 3 optical gas sensors, 4 electrochemical gas sensors, 5 and metal oxide gas sensors. 6 Among these, metal oxide semiconductor (MOS) sensors have gained widespread use for gas sensing due to their high sensitivity, excellent stability, and ease of fabrication. 7 In recent years, extensive research on MOS sensor materials has examined n-type semiconductors like ZnO, 8 SnO 2 , 9,10 In 2 O 3, 11 and WO 3 , 12 alongside p-type semiconductors including NiO, 13 CuO, 14 and Co 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

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CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Li,

Zhang,

Han

et al. 2024

ACS Appl. Nano Mater.

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Real-time monitoring of carbon monoxide (CO) is crucial for ensuring human safety. However, the accuracy of the CO detection is significantly diminished by high ambient humidity. This study focuses on synthesizing CeO 2 /In 2 O 3 hollow nanospheres with varying CeO 2 contents (0, 1, 2, 3 mol %) using a twostep method. Testing under different humidity conditions demonstrates that incorporating CeO 2 not only amplifies the response rate of pure In 2 O 3 sensors (from 1.4 to 1.65 at 100 ppm of CO) but also curtails the response and recovery times (from 11 s/27 s to 6 s/23 s) at 280 °C. Furthermore, CeO 2 /In 2 O 3 composite sensors exhibit improved selectivity, repeatability, and long-term stability. Notably, the robust CO detection performance under high humidity verifies that the fabricated CeO 2 /In 2 O 3 sensors can monitor CO in humid environments. The enhanced performance stems from the unique hollow structure, abundant mesopores on the surface, and the heterojunction between CeO 2 and In 2 O 3 .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Li,

Zhang,

Han

et al. 2024

ACS Appl. Nano Mater.

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“…Diverse strategies have been involved to overcome these limitations such as noble metal doping, 10 coupling with other narrow bandgap metal oxides, 11 surface modification fabrication of heterostructure junction, 12 and development of nanocomposites. [13][14][15][16] Among those strategies, the fabrication of p-n heterostructured metal oxides is one of the most efficacious processes to enhance their functional properties due to the formation of an electric field at the interface of the p-n junction incorporated with additional chemical and physical characteristics of individual metal oxide into one framework. 17 Recently, the interest in the fabrication of p-n heterostructures metal oxide has increased due to its tremendous prospect in environmental applications.…”

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confidence: 99%

Engineering of NiO/ZnO Core-Shell Nanostructure via Facile Chemical Processes for Environmental Application

Gomaa¹,

Sayed²,

Boshta³

2023

ECS J. Solid State Sci. Technol.

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NiO/ZnO core-shell nanoflake structures were successfully fabricated using a unique strategy consisting of a simple chemical bath deposition route followed by a metal-organic chemical vapor deposition technique with different growth times. The X-ray diffraction results combined with Raman measurements and X-ray photoelectron spectroscopy confirmed that the surface property and photocatalytic activity of NiO/ZnO core-shell nanostructures affected by varying the growth time of ZnO on the surface of NiO nanoflakes. The scanning electron microscopy images showed that the NiO/ZnO samples have a porous core-shell architecture with high surface area and abundant open sites, resulting in enhanced photocatalytic activity. The photocatalytic activity was tested for the prepared samples by measuring the degradation of crystal violet (CV) dye under ultraviolet irradiation. NiO/ZnO core-shell nanostructures deposited at 30 min exhibits higher photodegradation efficiency toward CV dye compared to NiO/ZnO core-shell deposited at 60 min and NiO nanoflakes standing alone. The enhanced photocatalytic activity is due to the formation of p–n heterojunction between ZnO and NiO with a high specific area and more active site of core-shell nanoflakes architecture. The obtained results in this research suggest a new strategy for the fabrication of highly efficient photocatalytic activity semiconducting metal oxide with core-shell.

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Hydrothermal synthesis of Z-type SnO2 quantum dot-modified ZnO nanosheets with enhanced photocatalytic activity

Chen,

2024

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Constructing porous ZnO/SnO2 nanocomposites for the detection of methane at low operating temperature

Cited by 6 publications

References 42 publications

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Engineering of NiO/ZnO Core-Shell Nanostructure via Facile Chemical Processes for Environmental Application

Hydrothermal synthesis of Z-type SnO2 quantum dot-modified ZnO nanosheets with enhanced photocatalytic activity

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Constructing porous ZnO/SnO2 nanocomposites for the detection of methane at low operating temperature

Cited by 6 publications

References 42 publications

CeO2/In2O3 Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO2/In2O3 Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

Engineering of NiO/ZnO Core-Shell Nanostructure via Facile Chemical Processes for Environmental Application

Hydrothermal synthesis of Z-type SnO2 quantum dot-modified ZnO nanosheets with enhanced photocatalytic activity

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CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity

CeO₂/In₂O₃ Hollow Nanosphere Heterojunction for Real-Time CO Monitoring under High Humidity