Cerium metal-organic framework composited with polyaniline on carbon cloth for high-sensitively electrochemical sensing of carbendazim
Rui Zhou, Lingzhi Liu, Yue–Hong Pang, Xiaofang Shen
Abstract
Carbendazim (CBZ) has generated significant attention due to potential harm to human health, thus developing a simple and economy-friendly approach for determining CBZ is vital. Herein, Cerium metal-organic framework (Ce-MOF) and polyaniline (PANI) were composited under mild condition and modified on carbon cloth (CC) to fabricate an electrochemical sensor based on Ce-MOF@PANI/CC for fast and sensitive determination of CBZ. Rod-shaped Ce-MOF facilitated the dispersion of PANI, while the doping of PANI improved conductivity of Ce-MOF to amplify detection signal. Moreover, the modification of Ce-MOF@PANI on CC increased the electrochemical active area of CC by 2.78 times. Under optimized conditions, the method demonstrated a linear range of 0.1–80 μM and a detection limit of 12.6 nM. Additionally, the response value of the sensor to CBZ still maintained 94.32% of the initial value after 15 days. It also had good reproducibility and anti-interference. The sensor was utilized for detecting CBZ in fruit (apple, pear), vegetables (tomato, cucumber), and water (lake, tap water) with recovery of 92.31%–105.47% consistent with those of high-performance liquid chromatography.