Gas sensing properties of Cu₂O and its particle size and morphology-dependent gas-detection sensitivity

Abstract

Particle size and morphology-dependent gas-detection sensitivity were studied, and the results indicated that the particle stacking mode is a key factor influencing gas sensing performance.

Green and gentle synthesis of Cu2O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

“…And, Cu 2 O nanoparticles have been widely used in various fields based on their unique magnetic, electronic and optical properties, such as CO oxidation, [2] gas sensing, [3] photodegradation, [4] photocatalyst [5] and so on. It is known that the sizes, structures and shapes which can influence the potential applications are dependent on the synthesis conditions and methods.…”

Facile synthesis of mesoporous hierarchical Co3O4–TiO2 p–n heterojunctions with greatly enhanced gas sensing performance

“…Therefore, there is a need to develop high-performance gas sensors with high sensitivity, low operating temperature and good stability for real-time monitoring of toluene and xylene. A variety of metal oxide semiconductors have been used as sensing materials to detect VOCs, such as ZnO, [4][5][6] SnO2, [7][8][9] In2O3, [10][11][12] Co3O4, [13][14][15] TiO2, 16,17 WO3, [18][19][20][21] Fe2O3, [22][23][24] Cu2O/CuO, 25,26 and NiO. 27 Among these metal oxide semiconductors, Co3O4 is believed to be a promising candidate for sensing of toluene and xylene because of its excellent catalytic activity for oxidizing them at low temperature which results from its larger adsorption amount of oxygen 28 on the surface than others and multivalent properties facilitating redox reactions.…”

Sensitive Room Temperature Photoluminescence-Based Sensing of H2S with Novel CuO–ZnO Nanorods

“…[1][2][3][4] High sensitivities, down to ppm and even sub-ppm levels, have been demonstrated using a range of semiconducting metal oxides (e.g. ZnO, 5,6 CuO, 7 WO 3 , 2 Cu 2 O, 3,8 SnO 2 , 9 and Fe 2 O 3 10 ). High sensitivity is just one of the important considerations with any sensor, however; the working temperature (T w ) is another.…”

“…High sensitivity is just one of the important considerations with any sensor, however; the working temperature (T w ) is another. T w for most reported H 2 S gas sensors is in the range of 150-450 °C, [1][2][3][4][5][6][7]9,10 but room temperature (RT) sensing would be preferable from the perspectives of device fabrication, miniaturization, operation and safety, given the autoignition of H 2 S at 260 °C in ambient atmosphere. [11][12][13] Various strategies have been adopted to enhance H 2 S sensing using metal oxides.…”