Defects Enriched p-type Zinc Stannate for Selective Detection of ppb-Level NO2 Gas at Ambient Temperature DOI

Nishita Pawar,

Vishnu G Nath, John D. Rodney

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(17), С. 20877 - 20888

Опубликована: Авг. 29, 2024

In this study, we explore the synthesis and gas-sensing capabilities of zinc stannate (Zn2SnO4) in three morphologies─spherical nanoparticles, urchins, octahedrons─aiming to investigate influence morphology on sensing properties. The fabricated devices exhibit a significant resistance decrease upon exposure NO2 at room temperature (24 °C), indicating p-type behavior. Among these morphologies, spherical nanoparticle-based sensor exhibits highest response 57% 6 ppm NO2, outperforming urchins octahedrons by approximately 1.2 4.1 times, respectively. This superior performance, with recovery times 6.3 s 224 s, is attributed enhanced redox reactions from larger surface area higher proportion oxygen interstitials. also demonstrates exceptional selectivity for over SO2, CO, NH3, CH4, detection limit 200 ppb. Furthermore, excellent reversibility only 2% variation across 20 consecutive test cycles remarkable long-term stability, performance fluctuation 2.3% 63 days without degradation.

Язык: Английский

Photoelectric H2S Sensing Based on Electrospun Hollow CuO-SnO2 Nanotubes at Room Temperature DOI Creative Commons
Cheng Zou,

Cheng Peng,

Xiaopeng She

и другие.

Sensors, Год журнала: 2024, Номер 24(19), С. 6420 - 6420

Опубликована: Окт. 3, 2024

Pure tin oxide (SnO2) as a typical conductometric hydrogen sulfide (H2S) gas-sensing material always suffers from limited sensitivity, elevated operation temperature, and poor selectivity. To overcome these hindrances, in this work, hollow CuO-SnO2 nanotubes were successfully electrospun for room-temperature (25 °C) trace H2S detection under blue light activation. Among all SnO2-based candidates, pure SnO2 sensor showed no signal, even toward 10 ppm, while the 1% achieved limit of (LoD) value 2.5 large response 4.7, short response/recovery time 21/61 s ppm H2S, well nice repeatability, long-term stability, This excellent performance could be ascribed to one-dimensional (1D) nanostructure, abundant p-n heterojunctions, photoelectric effect nanotubes. The proposed design strategies cater demanding requirements high sensitivity low power consumption future application scenarios such Internet Things smart optoelectronic systems.

Язык: Английский

Процитировано

6
Defects Enriched p-type Zinc Stannate for Selective Detection of ppb-Level NO2 Gas at Ambient Temperature DOI

Nishita Pawar,

Vishnu G Nath, John D. Rodney

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(17), С. 20877 - 20888

Опубликована: Авг. 29, 2024

In this study, we explore the synthesis and gas-sensing capabilities of zinc stannate (Zn2SnO4) in three morphologies─spherical nanoparticles, urchins, octahedrons─aiming to investigate influence morphology on sensing properties. The fabricated devices exhibit a significant resistance decrease upon exposure NO2 at room temperature (24 °C), indicating p-type behavior. Among these morphologies, spherical nanoparticle-based sensor exhibits highest response 57% 6 ppm NO2, outperforming urchins octahedrons by approximately 1.2 4.1 times, respectively. This superior performance, with recovery times 6.3 s 224 s, is attributed enhanced redox reactions from larger surface area higher proportion oxygen interstitials. also demonstrates exceptional selectivity for over SO2, CO, NH3, CH4, detection limit 200 ppb. Furthermore, excellent reversibility only 2% variation across 20 consecutive test cycles remarkable long-term stability, performance fluctuation 2.3% 63 days without degradation.

Язык: Английский

Процитировано

0