NO2 gas sensors

In this paper, we reported NO2 sensors based on the ZnO nanorods with different sizes fabricated using a simple hydrothermal method without surfactants. The sensors offered the excellent response and sensitivity to NO2 at very low concentrations as low as 100 ppb. The influence of the size of the ZnO nanorods on the NO2 sensing response was focused.

12p vijeff 30-11-2023 3 2   Download

This work also supports the idea of altering the electrical conductivity of sensors and enhancing the response and selectivity of NO2 gas sensing devices using visible light as light-activated gas sensors, which would create new opportunities for specialised NO2 sensors.

13p viberbers 09-08-2023 3 3   Download

A nitrogen dioxide (NO2) gas sensor based on the blend of copper phthalocyanine-tetrasulfonic acid tetrasodium/tris-(8-hydroxyquinoline)aluminum (CuPcTs/Alq3) thin films was fabricated. The effect of chemical surface treatment with toluene on the structural, surface morphology and device sensitivity has been examined.

8p viberbers 09-08-2023 3 3   Download

The networked ZnO nanowires (NWs) are synthesized by thermal evaporation at 900 ˚C, using a mixture of ZnO and graphite. The morphology, crystalline structure, and chemical composition of the NWs are evaluated by field-emission scanning electron microscopy, X-ray diffraction, and energy-dispersive spectrum.

12p vispiderman 15-06-2023 5 3   Download

In this work, the SnO2 nanofibers (NFs) were directly synthesized through a electrospinning method following the annealing treatment process at 600°C for 3h. The morphological, compositional, crystal properties of material were characterized using field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), respectively.

5p vimelindagates 18-07-2022 8 2   Download

Heterojunctions of metal oxides and single-walled carbon nanotubes (SWCNTs) have attracted great attention because of their unique physical properties and giant potential applications. In this study, we report the fabrication of NO2 gas sensors using heterojunctions made of SnO2 nanowires and SWCNTs. The single crystal SnO2 nanowires were grown on Pt electrodes via thermal evaporation. A thin film of SWCNTs was synthesized directly on top of the SnO2 nanowires to form the SnO2/SWCNTs heterojunctions by arc- discharge method.

4p cothumenhmong11 10-05-2021 9 1   Download

In this report, we report a green, rapid and scalable synthetic route for the production of reduced graphene oxide (rGO) using an environment-friendly reducing agent (L-glutathione/L-Glu) to test its feasibility for CO & NO2 gas sensing.

10p tamynhan4 06-09-2020 18 2   Download

Iron oxide nanorods were synthesized by chemical co-precipitation method. The structural and morphological characteristics of the as-synthesized nanorods were analyzed by Xray diffraction (XRD) and scanning electron microscopy. The results show that the iron oxide nanorods include the mixture of Fe3O4, γ-Fe2O3 and FeOOH with the diameter and the length of iron oxide nanorods to be 30 and 100 nm, respectively. The iron oxide nanorods were then dispersed and deposited on the gold electrode of quartz crystal microbalance (QCM) for the gas sensor.

8p nguyenminhlong19 22-04-2020 30 1   Download

In this research, we present the ZnO nanorods synthesized through the simple route of the hydrothermal method. The ZnO nanorods were developed through the application of only zinc acetate Zn(CH3 COO)2 and ammonia solution, NH4 OH, in the hydrothermal process at 1500 C for 10 hours. The size of the ZnO nanorods was defined as approximately 300 nm in diameter and 1-2 µm in length. The fabrication of sensors was achieved through drop-coating of synthesized ZnO nanorods on Al2 O3 substrates integrated with Au electrodes.

5p caygaocaolon1 13-11-2019 11 2   Download

The gas-sensing performance of the SnO2 nanowires sensors annealed at different temperatures have also investigated. The results revealed that the annealed temperatures of 400 C and 500 oC do not affected on gas-sensing performance of SnO2 nanowires sensors, while the annealed temperature of 600oC results in strong decrease in NO2 gas response as compared with as-grown SnO2 nanowires sensor.

7p cumeo3000 01-08-2018 33 1   Download