Utilising problematic waste to detect toxic gas release in the environment: fabricating a NiO doped CuO nanoflake based ammonia sensor from e-waste

Abstract

Using problematic electronic waste to synthesise high-purity nanomaterials can enable sustainable production and create opportunities to divert waste from landfills. Current research represents a facile strategy for the controllable synthesis...

Simultaneous detection of melamine and cyanuric acid using powder X‐ray diffraction

“…ME and CA phases were simultaneously identified based on the Rietveld refinement process and this phase refinement gives a better phase match between observed patterns and reference patterns. The diffraction peak's width and shape were fit to functions that describe their systematic behavior connected to 2 θ (Hossain et al., 2022). The 2 θ peak position and intensity of diffraction peaks are assessed from the crystal structures.…”

A room-temperature gas sensor based on 2D Ni–Co–Zn ternary oxide nanoflakes for selective and sensitive ammonia detection

“…The sensor showed a response of 0.6 towards 200 ppm NH 3 at a RT of 20 °C. 17 Haunsbhavi et al reported a NiO thin film based NH 3 sensor, synthesized by the sol-gel spin coating technique. This sensor revealed an acceptable response towards 5 ppm NH 3 at an operating temperature of 150 °C.…”

Low Overpotential Amperometric Sensor Using Yb2O3.CuO@rGO Nanocomposite for Sensitive Detection of Ascorbic Acid in Real Samples

“…Previously, researchers have investigated various types of metal oxides, such as CuO [ 22 , 23 ], MnO 2 [ 24 ], NiO [ 25 ], Fe 2 O 3 [ 26 ], and ZnO [ 27 ], as electron mediators for sensing applications. Additionally, doped metal oxides, such as NiO.CoO nanocomposites [ 28 ], CdO.SnO 2 .V 2 O 5 [ 29 ], CuO.In 2 O 3 [ 30 ], CuO.Nd 2 O 5 [ 31 ], CuO.NiO [ 32 ], and CuO.ZnO [ 33 ], have been studied as efficient sensing materials with higher sensitivity, small detection limits, wide linear dynamic ranges, and quick response times. CuO, a p -type semiconductor, has shown particularly good performance as an electrocatalyst in sensing applications [ 34 ].…”

“…CuO, a p -type semiconductor, has shown particularly good performance as an electrocatalyst in sensing applications [ 34 ]. To improve the performance of CuO, researchers have also investigated using other semiconductor metal oxides such as In 2 O 3 [ 30 ], Nd 2 O 5 [ 31 ], NiO [ 32 ], TiO 2 [ 35 ], and SnO 2 [ 36 ] in combination with CuO as bimetallic oxide pairs. Ytterbium oxide (Yb 2 O 3 ) has also been explored for use in sensing applications [ 37 , 38 , 39 ].…”