| 초록 |
Surface area and surface-active sites are two significant parameters in improving gas sensing. We present a one-step hydrothermal route for synthesis of Reduced Graphene Oxide/Tungsten Disulfide (RGO/WS2) hierarchical nanostructures, as well as their validation in achievement of improved NH3 sensing at low temperature. Commercial RGO is used to create RGO/WS2 nanohybrid with 10, 20, 30, and 40 wt.% RGO in the WS2 matrix. Various physicochemical techniques, including XRD, FE-SEM, TEM/HRTEM, and EDAX, were used to examine as-developed nanohybrid. Development of a hierarchic flaked bead like framework allows for more efficient gas delivery networks, resulting in a significant increase in sensing response to NH3. Optimized sensor showed twice the selective response to NH3 as pristine WS2 sensor and highly selective (3.5 times) in comparison to other volatile organic compounds. The NH3 gas response analysis clarifies the RGO's role in increasing active surface and surface area. The findings of this study add new insights to the research spreadsheet for RGO/WS2 based nanohybrids in light of multidisciplinary applications. |
