Details

Autor(en) / Beteiligte

• Guo, Xuezheng
• Ding, Yanqiao
• Yang, Xi
• Du, Bingsheng
• Zhao, Chengjiu
• Liang, Chengyao
• Ou, Yi
• Kuang, Delin
• Wu, Zhilin
• He, Yong

Titel

2D SnSe2 nanoflakes decorated with 1D ZnO nanowires for ppb-level NO2 detection at room temperature

Ist Teil von

• Journal of hazardous materials, 2022-03, Vol.426, p.128061-128061, Article 128061

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The detection of air pollutant nitrogen dioxide (NO2) is of great importance arising from its great harm to the ecological environment and human health. However, the detection range of most NO2 sensors is ppm-level, and it is still challenging to achieve lower concentration (ppb-level) NO2 detection. Herein, 2D tin diselenide nanoflakes decorated with 1D zinc oxide nanowires (SnSe2/ZnO) heterojunctions were first reported by facile hydrothermal and ultra-sonication methods. The response of the fabricated SnSe2/ZnO sensor enhances 3.41 times on average compared with that of pure SnSe2 sensor to 50–150 ppb NO2 with a high detection sensitivity (22.57 ppm-1) at room temperature. In addition, the SnSe2/ZnO sensor has complete recovery, negligible cross-sensitivity, and small relative standard deviation (6.98%) during the 1 month sensing test, which can meet the requirements for NO2 detection in environmental monitoring. The enhanced NO2 sensing performance can be attributed to the n-n heterojunction constructed between SnSe2 and ZnO. The as-prepared sensor based on SnSe2/ZnO hybrid significantly promotes the development of the low detection limit of the NO2 sensor at room temperature. A room-temperature NO2 sensor based on 2D/1D SnSe2/ZnO composite with ppb-level detection ability was designed by hydrothermal and ultra-sonication strategies. [Display omitted] •SnSe2/ZnO was synthesized by facile hydrothermal and ultra-sonication techniques.•SnSe2/ZnO sensor has high response of 120% to 50 ppb NO2 at room temperature.•The effect of temperature, humidity, and light on NO2 response was investigated.•The heterojunction promotes electron transfer and enhances NO2 sensing response.