Gas sensing properties of semiconducting copper oxide nanospheroids

Highly selective and sensitive response of Polypyrrole–MnO2 based composites towards ammonia gas

“…This shows that hoping of the adsorbed ammonium ions on the surface of the sensor become more active at greater concentration which may cause rise in the sensor response towards the gas. The flattening of the graph after 30 ppm (in case of PPy/10% MnO 2 ) and 50 ppm (in case of rest of the samples) of ammonia is because of the complete coverage of the surface of sensor with molecules of ammonia . The composite PPy/10% MnO 2 is of the best relative sensitivity.…”

A Novel Electrochemical Sensor Based on Printex L6 Carbon Black Carrying CuO/Cu2O Nanoparticles for Propylparaben Determination

“…This behavior may be attributed to the great electroative area of the CPL6 as a result of its nanostructured nature. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Conduction at p-type semiconductor materials is based on the mobility of positive charge carriers known as holes (h + ) [39]. The presence of CuO nanoparticles with incomplete d-orbitals has created new active sites for electron transfer across electrolyte/electrode surface [18].…”

“…The presence of CuO nanoparticles with incomplete d-orbitals has created new active sites for electron transfer across electrolyte/electrode surface [18]. Considering a room temperature system, the adsorption of O 2À species can trap electrons from the valence band, thus increasing the availability of holes of in the solid material [39]. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Conduction at p-type semiconductor materials is based on the mobility of positive charge carriers known as holes (h + ) [39].…”

“…The electrochemical behavior of copper oxide based sensors also can be attributed to the electrical properties of CuO and Cu 2 O. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Conduction at p-type semiconductor materials is based on the mobility of positive charge carriers known as holes (h + ) [39]. In aqueous electrolyte, the adsorption/desorption of oxygen molecules on the semiconductor surface causes changes in electrical resistance [40].…”

Photocatalytic Degradation of Vat Red 13 by Green Synthesized Copper Oxide Nanocatalyst

“…In particular, copper oxide, a p-type transition metal oxide semiconductor having a narrow band gap (Eg = 1.2 eV) and an exceptional band structure has received a good deal of attention due to its diverse applications in different fields of solar energy cells [19,20], gas sensing [21,22], electronics [23,24], bio-sensing [25][26][27], heterogeneous organic catalysis [28][29][30], super conductors [31], etc.…”