MOFs-Derived Nano-CuO Modified Electrode as a Sensor for Determination of Hydrazine Hydrate in Aqueous Medium

Yaqi Lu; Dan Wu; Ziyin Li; Quanjie Lin; Xiuling Ma; Zhangjing Zhang; Shengchang Xiang

doi:10.3390/s20010140

MOFs-Derived Nano-CuO Modified Electrode as a Sensor for Determination of Hydrazine Hydrate in Aqueous Medium

Sensors (Basel). 2019 Dec 24;20(1):140. doi: 10.3390/s20010140.

Authors

Yaqi Lu^{1

2}, Dan Wu¹, Ziyin Li¹, Quanjie Lin¹, Xiuling Ma¹, Zhangjing Zhang¹, Shengchang Xiang¹

Affiliations

¹ Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou 350007, China.
² College of Chemistry and Materials Science, Longyan University, No.1 North Dongxiao Rd., Longyan 364012, China.

Abstract

It very important to be able to efficiently detect hydrazine hydrate in an aqueous medium due to its high toxicity. Here, we have proposed a new idea: to construct a sensor for the rapid determination of hydrazine hydrate based on the nano-CuO derived by controlled pyrolysis of HKUST-1 [Cu₃(BTC)₂(H₂O)₃]. The as-prepared CuO at 400 °C possesses a uniform appearance with nano-structure via SEM images, and the nano-CuO-400 has exhibited excellent electrocatalytic activity towards hydrazine oxidation. Amperometric i-t curves shows the peak current as linearly proportional to the hydrazine concentration within 1.98-169.3 μmol L^-1 and 232-2096 μmol L^-1 with the detection limit of 2.55 × 10^-8 mol L^-1 and 7.01 × 10^-8 mol L^-1, respectively. Moreover, the sensor constructed in the experiment shows good selectivities, and it is feasible to determining actual water samples.

Keywords: electrochemical sensor; hydrazine hydrate; metal-organic frameworks; pyrolysis derivatives.