A room temperature ammonia sensor based on nanosized copper hexacyanoferrate(II)

Add time:07/26/2019    Source:sciencedirect.com

In the ultrasonic wave from 20–70 kHz, nanosized copper hexacyanoferrate(II) materials were synthesized by the reaction of copper sulfate and potassium ferrocyanide(II) and at room temperature, respectively, and 323 K. The sensors based on nanosized copper hexacyanoferrate(II) were fabricated in spray technology. The gas-sensing properties of sensors were tested at different temperature and operating voltage. The sensors exhibited an excellent selection for ammonia at room temperature and had a linear response at 5, 10 and 15 V operating voltage. The optimum operating voltage of the sensor was 5 V. The influence of temperature on the sensor response to NH3 was significant. Response of the sensor for ammonia is mainly based on a weak chemisorption.

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