Non-Enzymatic Glucose Biosensor Based on CuO-Decorated CeO2 Nanoparticles

Abstract

Copper oxide (CuO)-decorated cerium oxide (CeO2) nanoparticles were synthesized and used to detect glucose non-enzymatically. The morphological characteristics and structure of the nanoparticles were characterized through transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The sensor responses of electrodes to glucose were investigated via an electrochemical method. The CuO/CeO2 nanocomposite exhibited a reasonably good sensitivity of 2.77 μA mM−1cm−2, an estimated detection limit of 10 μA, and a good anti-interference ability. The sensor was also fairly stable under ambient conditions.

The Use of Copper Oxide Thin Films in Gas-Sensing Applications

“…It is a less expensive technology than rare materials used in gas-sensing applications [3]. Therefore, it has been utilized in various applications, including: solar energy cells [4], optoelectronics [5], catalysis [6][7][8], biosensors [9][10][11][12][13], photoelectrochemical sensors [14,15], supercapacitors [16], lithium ion batteries [17,18], infrared photo detectors [19], electrochemical sensors [20,21], and gas sensors. Figure 1b shows the number of papers published from 1995 to now, where CuO was studied.…”

Direct synthesis of CeO2 nanospindles on gold electrode by electrochemical method

“…Most of CeO2 applications are dependent on the oxidationreduction cycles of Ce 4+ / Ce 3+ and the type of oxygen hole in the structure of CeO2. [6] Up to now, various methods have been reported for preparation of CeO2 one-dimensional. For example, Yang et al [7] synthesized CeO2 nanorods with 15-20 nm in diameter and 200-300 nm in length, using Na3PO4 as a mineralization agent under hydrothermal conditions of 220 o C for 72 h. In other study, Fu and coworker [8] synthesized CeO2 nanowires by a hydrothermal method for fast humidity sensors.…”

Hierarchical copper oxide microspheres prepared in an ordinary household microwave oven

“…CuO and Cu 2 O are two semiconducting phases of CuO. The existence of satellite peaks indicates the formation of CuO [17]. However, the Cu 2p 3/2 peak, which may be integrated from any combination of Cu 2 O, Cu, or CuO peak, is difficult to interpret because Cu and Cu 2 O have nearly similar binding energies.…”