High precision NH3 sensing using network nano-sheet Co3O4 arrays based sensor at room temperature

Abstract

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Enhanced NH3 gas-sensing performance of silica modified CeO2 nanostructure based sensors

“…Therefore, an ammonia sensor with high response, good selectivity, long-term stability and low detection limit is critical and urgently needed. So far, various materials have been explored to detect NH3 gas, such as SnO2 [2][3][4][5], V2O5 [6], WO3 [7,8], Co3O4 [9,10], ZnO [11][12][13], TiO2 [14], carbon nanotubes [15,16], graphene [17,18], etc. However, the gas response using these materials is not high enough, and the detection limit of ammonia is above ppm level.…”

Co3O4 nanosheet-built hollow dodecahedrons via a two-step self-templated method and their multifunctional applications

“…On the one hand, ZIF-67 can be easily removed in acidic solutions and cobalt ions with variable valences can provide trivalent ions to LDHs. On the other hand, cobalt element in ZIF-67 derived Co 3 O 4 has been applied in many fields such as gas sensing and catalyst owing to its semiconductor characteristic and high catalytic activity caused by good vacant electron orbit [26][27][28][29][30][31][32]. Secondly, Co-LDH HDs were further used as self-template to fabricate Co 3 O 4 NSHDs by a controlled calcination.…”

Co3O4 as p-Type Material for CO Sensing in Humid Air

“…There are a number of works devoted to the study of the sensor properties of Co 3 O 4 to various gases in dry air—volatile organic compounds (VOCs): xylene [17], ethanol [18,19,20], methanol [20], acetone [17,21], as well as NH 3 [22], NO x [23], H 2 S [24], CO [16], etc. At the same time, only few articles have been devoted to the study of the sensor properties to CO of pure cobalt oxide in humid air [14,25].…”