Selective detection of parts-per-billion H2S with Pt-decorated ZnO nanorods

Yu, Aihua; Li, Zhou; Yi, Jianxin

doi:10.1016/j.snb.2021.129545

Cited by 40 publications

(14 citation statements)

References 53 publications

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“…The peak at B582 cm À1 is thought to be the E1L mode associated with the surface defects in ZnO. 38 The effect of the electron donor defects (V O ) on the peak intensity is more pronounced. 49 Compared with other samples, 4In-ZnO has the largest peak at B582 cm À1 , indicating that 4In-ZnO has the most V O and Zn i is the best.…”

Section: Characterizationmentioning

confidence: 99%

“…54 Increasing the operating temperature will improve the sensor response because as the temperature increases, the oxygen molecules ionize more rapidly and the equilibrium shifts toward desorption. 38 Insufficient reaction time between the oxygen ions and the target gas molecules can reduce the sensor response. 55 As exhibited in Fig.…”

Section: Gas Sensing Propertiesmentioning

confidence: 99%

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Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

Zhang

Yang

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Characterizationmentioning

confidence: 99%

Section: Gas Sensing Propertiesmentioning

confidence: 99%

Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

Zhang

Yang

et al. 2022

Phys. Chem. Chem. Phys.

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“…prepared ZnO/Pt nanofibers by functionalizing a ZnO nanomaterial with Pt nanoparticles. 24 The ZnO/Pt nanofibers achieved a 5.8 times higher response value to 100 ppb H 2 S than that of ZnO. Wu et al loaded ZIF-8 particles with ZnO by a self-template method.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Another strategy is to prepare sensitive composites by introducing precious metals (Pt, Ru, Au, etc.) or a zeolitic imidazolate framework (ZIF) into ZnO. ,− Yu et al prepared ZnO/Pt nanofibers by functionalizing a ZnO nanomaterial with Pt nanoparticles . The ZnO/Pt nanofibers achieved a 5.8 times higher response value to 100 ppb H 2 S than that of ZnO.…”

Section: Introductionmentioning

confidence: 99%

ZnO Nanoparticle-Based MEMS Sensors for H₂S Detection

Zhu

Qiu

Zheng³

et al. 2022

ACS Appl. Nano Mater.

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The development of microelectromechanical system (MEMS)-based sensors with ZnO nanoparticles as sensitive materials for detecting a low concentration of H 2 S has recently attracted extensive attention because of their small size and easy integration. In this study, undecorated ZnO nanoparticles were synthesized by a facile coprecipitation method with the regulation of ammonia water. The phase structure, nanostructure, specific area, surface basicity, and oxygen species of the synthesized ZnO nanoparticles were systematically investigated. Then, preferred ZnO-1 nanoparticles were deposited on the MEMS microhotplate chips as a sensitive material, and the corresponding gas-sensing performances were characterized for various gases at an optimal operating temperature of 220 °C. The MEMS-based sensors with ZnO-1 showed good sensitivity to 1 ppm H 2 S at 220 °C with response/recovery times of 72 and 29 s, respectively. Furthermore, the sensor presented a wide linear range from 50 ppb to 15 ppm, good repeatability, and high selectivity. Such enhanced sensing performance to H 2 S was mainly attributed to the large surface area and the high surface basicity of prepared ZnO-1 nanoparticles. Moreover, a plausible reason for the enhanced sensing performance was also proposed.

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“…Among these, the resistive sensor has attracted great attention because of its simple fabrication process and excellent sensing performance. Several typical semiconducting metal oxides, including CuO [ 6 , 7 ], ZnO [ 8 , 9 , 10 ], In 2 O 3 [ 11 , 12 ], WO 3 [ 13 ], SnO 2 [ 14 , 15 ], and Co 3 O 4 [ 16 , 17 ], have been extensively investigated for fabricating gas sensors. However, the gas sensors based on these metal oxides still have several problems, such as low sensitivity, poor selectivity, long response time, and poor detection limits.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and H2S-Sensing Properties of MOF-Derived Cu-Doped ZnO Nanocages

Wang

et al. 2022

Nanomaterials

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Metal–organic framework (MOF)-derived pure ZnO and Cu-doped ZnO nanocages were fabricated by calcining a zeolitic imidazole framework (ZIF-8) and Cu-doped ZIF-8. The morphology and crystal structure of the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). It was found that Cu doping did not change the crystal structures and morphologies of MOF-derived ZnO nanocages. The H2S-sensing properties of the sensors based on ZnO and Cu-doped ZnO nanocages were investigated. The results indicated that the H2S-sensing properties of MOF-derived ZnO nanocages were effectively improved by Cu doping, and the optimal doping content was 3 at%. Moreover, 3 at% Cu-doped ZnO nanocages showed the highest response of 4733 for 5 ppm H2S at 200 °C, and the detection limit could be as low as 20 ppb. The gas-sensing mechanism was also discussed.

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Selective detection of parts-per-billion H2S with Pt-decorated ZnO nanorods

Cited by 40 publications

References 53 publications

Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

ZnO Nanoparticle-Based MEMS Sensors for H₂S Detection

Synthesis and H2S-Sensing Properties of MOF-Derived Cu-Doped ZnO Nanocages

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Selective detection of parts-per-billion H2S with Pt-decorated ZnO nanorods

Cited by 40 publications

References 53 publications

Ultra-sensitive H2S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

Ultra-sensitive H2S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

ZnO Nanoparticle-Based MEMS Sensors for H2S Detection

Synthesis and H2S-Sensing Properties of MOF-Derived Cu-Doped ZnO Nanocages

Contact Info

Product

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Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

Ultra-sensitive H₂S sensor based on sunflower-like In-doped ZnO with enriched oxygen vacancies

ZnO Nanoparticle-Based MEMS Sensors for H₂S Detection