Vertical copper oxide nanowire arrays attached three-dimensional macroporous framework as a self-supported sensor for sensitive hydrogen peroxide detection

CuMn2O4 Spinel Nanoflakes for Amperometric Detection of Hydrogen Peroxide

“…These peak positions are basically consistent with those of Cu 2+ 2p in the reference CuO sample (Figure S4C), indicating the existence of Cu 2+ ions in both materials. 26,27 It should be pointed out that the peaks at 950.3 and 930.5 eV are observed in the high-resolution Cu 2p XPS spectrum of the spinel CuMn 2 O 4 material, being assigned to Cu 2p 1/2 and Cu 2p 3/2 spin orbits of the tetrahedral Cu + ions. 15 According to the peak area, the ratio of Cu + /Cu 2+ ions is calculated to be 0.53:0.47, which indicates the flexible valence (Cu + and Cu 2+ ) of Cu atoms in the spinel CuMn 2 O 4 material, and the low-valence Cu + ions have a relatively higher content than those in the reported literature.…”

Copper(II) Oxide Nanoparticles Embedded within a PEDOT Matrix for Hydrogen Peroxide Electrochemical Sensing

“…Hydrogen peroxide is an electroactive molecule, and thus, the development of simple, rapid, sensitive, and cost-effective electrochemical sensors for the efficient and accurate detection of H 2 O 2 is of great interest [ 41 ]. In the search for cheap materials and facile synthetic procedures, electrodes modified with copper oxide-based particles were more and more involved in the nonenzymatic sensing of hydrogen peroxide [ 25 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. For example, glassy carbon electrodes (GCE) modified with electrodeposited nanosheets of Cu@CuO [ 42 ], hollow [ 45 ], 3D flower-like CuO/Cu [ 47 ], or nest-like CuO nanostructures [ 25 ] proved to have excellent electrochemical catalytic performances towards H 2 O 2 reduction in terms of sensitivity, a wide linear response range, a low detection limit, and/or fast responses.…”

“…For example, glassy carbon electrodes (GCE) modified with electrodeposited nanosheets of Cu@CuO [ 42 ], hollow [ 45 ], 3D flower-like CuO/Cu [ 47 ], or nest-like CuO nanostructures [ 25 ] proved to have excellent electrochemical catalytic performances towards H 2 O 2 reduction in terms of sensitivity, a wide linear response range, a low detection limit, and/or fast responses. In addition, when used as a direct electrode material, CuO deposited on Cu/Ni foams showed rapid and selective responses to hydrogen peroxides [ 43 , 44 ].…”

Preparation of CuO Nanorods by Thermal Oxidation in Ozone Ambient

“…Various physical and chemical methods have been proposed to synthesize CuO nanomaterials such as quick-precipitation [4], chemical reduction [7], electrochemical [8], microwave-irradiation [6], sonochemical [3], thermal oxidation of copper [9]. Even though a wide range of morphologies have been achieved by these methods such as nanocubes [10], nanospheres [11], nanoneedles [12], nanobelts [13], nanodisks [14], only few chemcial methods are available for construction of CuO nanowires or nanorods [15][16][17]. In comparison to complex chemical methods, thermal oxidation of copper substrates shows outstanding advantages in term of cost effective, facile process, time saving, etc.…”