研究目的
To evaluate the gas sensing performance of niobium oxide (Nb2O5) nanoclusters deposited onto few-layers graphene powder by magneton sputtering.
研究成果
The Nb2O5/graphene composite showed good sensing properties vs. NO2 at room temperature, with performance depending on the deposition parameters. Higher deposition electrical power increased the concentration of Nb2O5 nanoparticles on graphene flakes, enhancing sensor response.
研究不足
The study focused on NO2 detection at room temperature, and the influence of higher humidity levels or other gases was not extensively explored.
1：Experimental Design and Method Selection:
The study used RF magnetron sputtering to deposit Nb2O5 nanoclusters on graphene powder. Two samples were prepared by varying the electrical power deposition (50 and 80 W).
2：Sample Selection and Data Sources:
Graphene powder of
3：6 nm thickness was purchased from Graphene Supermarket. List of Experimental Equipment and Materials:
SEM (JEOL Microscope, model JSM 7401-F), TEM (Hitachi H-800 model), Kratos AXIS UltraDLD instrument for XPS analysis.
4：Experimental Procedures and Operational Workflow:
Nb2O5 deposits were grown at room temperature on graphene powder. The deposition was carried out at a 6 Pa gas pressure, with a powder vibration frequency of 10 Hz, a deposition time of 30 min.
5：Data Analysis Methods:
Gas sensing responses were calculated based on conductance changes in the presence of gases.
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