Facile microwave-assisted hydrothermal synthesis of varied-shaped CuO nanoparticles and their gas sensing properties

Synthesis and Characterization of CuO, TiO2, and CuO-TiO2Mixed Oxide by a Modified Oxalate Route

“…CuO is a narrow bandgap (1.2 eV) p-type semiconductor with photoconductive and photochemical properties and has found applications in gas sensing [3,4], in catalysis [5][6][7], as antimicrobial agent [8][9][10][11], and in batteries [12], magnetic devices [13][14][15], super capacitors [16], and field emission [17]. TiO 2 is an n-type semiconductor with wide band gap ranging from 3.2 eV to 3.6 eV.…”

Iron Oxide Nanoparticles for Next Generation Gas Sensors

“…For p-type material, the reducing gases extract holes from the oxide material, and hence the conductance is reduced [1][2][3][4][5][6][7][8]. Typically, various materials have been reported for use in semiconductor gas sensors, such as SnO 2 (n-type) [9], TiO 2 (n-type) [10], ZnO (n-type) [11], In 2 O 3 (n-type) [12], WO 3 (n-type) [13][14][15], α-Fe 2 O 3 (n-type) [16], α-Fe 2 O 3 (n-type) [17], carbon nanotube (p-type) [18,19], Co 3 O 4 (p-type) [20], V 2 O 5 (p-type) [21], CuO (p-type) [22], and etc. Among them, α-Fe 2 O 3 has very large potential for practical use in gas sensors due to its high sensitivity, high stability and sensitivity to various gases, especially toxic gases [23,24,70].…”

Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

“…To date, TiO 2 and ZnO have been the most extensively investigated semiconductor photocatalysts due to their unique blend of properties, and have demonstrated excellent photocatalytic activity towards complete degradation of wide range of organic dyes. As an important p-type semiconductor metal oxide with a narrow band gap (1.2-1.5 eV), copper oxide (CuO) has drawn increasing research attention due to its attractive properties like nontoxicity, excellent reactivity, chemical stability, electrochemical activity, low production cost and abundant availability, and has been widely used in diverse applications like gas sensors, solar cells, field emissions, Li-batteries, supercapacitors, and catalysis [4][5][6][7][8][9]. Unfortunately, the reports on the photodegradation of organic dyes using CuO as photocatalyst is limited as the activity of pure CuO is not high enough due to the fast recombination of photogenerated electron-hole pairs [10][11][12][13][14][15][16].…”