Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 349, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.130775
Keywords
Au NPs; SnS2 nano-flowers; Schottky contact; NO2; Low temperature gas sensors
Funding
- National Natural Science Foundation of China [61971085, 61611130065]
- Fundamental Research Funds for the Central Universities [DUT19RC (3) 054]
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The Au modified SnS2 nano-flowers show improved gas-sensing characteristics at low temperatures, with higher response values and shorter response and recovery times. The enhanced sensing properties can be attributed to the catalytic effect of Au NPs and the Schottky contact formed between Au NPs and SnS2.
The Au modified SnS2 nano-flowers were synthesized, and the morphology and properties of the SnS2 nano-flowers materials were optimized. Au modified SnS2 nano-flowers chemiresistive-type sensors show better gas-sensing characteristics at low temperatures. At the optimal operating temperature of 100 degrees C, the response value (14.5) of Au/SnS2 sensor to 8 ppm NO2 is significantly higher than that (9.6) of the pristine SnS2 nano-flowers based sensor, and the response and recovery time were also greatly reduced. The improved sensing properties can be attributed to the synergistic effect of the catalytic effect of Au NPs and the Schottky contact formed between Au NPs and SnS2.
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