Surface Superoxide Complex Defects-Boosted Ultrasensitive ppb-Level NO2 Gas Sensors

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Yuxiang LiXincun Dou

Abstract

Sn(4+) -O2 (-•) centers are intentionally created in SnO2 nanoflowers by a thermodynamically instable synthetic process. The resulting SnO2 nanoflower-based sensor is confirmed to be the most sensitive ppb-level chemiresistor NO2 sensor to date. The Sn(4+) -O2 (-•) centers with strong gas-adsorbing and high eletron-donating capability towards NO2 molecules decisively determine the sensor sensitivity.

References

Jan 29, 2000·Science·J KongH Dai
Sep 16, 2004·Angewandte Chemie·Nicola PinnaMarkus Niederberger
Aug 19, 2010·Angewandte Chemie·Antonio TricoliAlexandra Teleki
Mar 10, 2011·Angewandte Chemie·Michael HübnerJan-Dierk Grunwaldt
Jan 1, 2010·Sensors·Chengxiang WangRui Gao
May 20, 2014·Nano Letters·Xiaoli WangChongwu Zhou

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Citations

Mar 18, 2017·ACS Applied Materials & Interfaces·Deepa KathiravanAdhimoorthy Saravanan
Jul 14, 2017·Physical Chemistry Chemical Physics : PCCP·Shuai WangZhi Yang
Sep 13, 2018·ACS Applied Materials & Interfaces·Bin TongXiaodong Fang

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