研究目的
Investigating the gas-sensing properties of pristine and SnS2 functionalized TeO2 nanowires (NWs) towards NO2 gas.
研究成果
The pristine TeO2 NW sensor exhibited better gas-sensing performance towards NO2 gas compared to the SnS2 functionalized TeO2 NW sensor. The decrease in sensing performance with SnS2 functionalization was attributed to the coverage of TeO2 surface by SnS2 nanoparticles.
研究不足
The study did not precisely determine the optimal sensing temperature for the TeO2 NW gas sensor. The coverage of TeO2 surface by SnS2 nanoparticles was identified as a limitation leading to decreased sensing performance.
1：Experimental Design and Method Selection:
The study involved the synthesis of TeO2 NWs using a vapor–liquid–solid (VLS) growth method and functionalization with SnS2 using atomic layer deposition (ALD) followed by thermal treatment.
2：Sample Selection and Data Sources:
Highly pure metallic Te powders were used as starting materials for the growth of TeO2 NWs.
3：List of Experimental Equipment and Materials:
A vertical furnace for NW growth, ALD system for SnS2 deposition, and various characterization tools including XRD, SEM, TEM, and EDAX.
4：Experimental Procedures and Operational Workflow:
TeO2 NWs were grown on silicon wafer with a 3 nm-thick Au layer as a catalyst. SnS2 was deposited using TDMASn and H2S as precursors.
5：Data Analysis Methods:
The gas sensing properties were evaluated by measuring the resistance change in the presence of NO2 gas at different temperatures.
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