Photon assisted room-temperature hydrogen sensors using PdO loaded WO3 nanohybrids
作者：Xin Geng; Yifan Luo; Bingbing Zheng; Chao Zhang
關鍵字：H2 sensor, Room- temperature sensing, Visible light illumination, PdO-WO3
論文來源：期刊
具體來源：International Journal of Hydrogen Energy
發(fā)表時間：2017年
In the present paper, we report novel room-temperature hydrogen sensors based on palladium oxide (PdO) loaded tungsten oxide (PdO-WO3) nanohybrids. We synthesized WO3 nanorods by hydrothermal method. Then the as-synthesized nanorods were mixed into PdCl2 solution with a subsequent thermal treatment to form PdO-WO3 nanohybrids. XRD and XPS test confirmed that PdO-WO3 nanohybrids were successfully prepared. FE-SEM and HRTEM images showed that PdO nanoparticles were distributed on the surface of WO3 nanorods in the nanohybrids. UV-Vis spectra indicated that broader visible light absorption range of PdO-WO3 composites was obtained when compared with that of pure WO3. The obtained PdO-WO3 sensors exhibited good responses to ppm-level H2 gas at room temperature under visible light illumination, and the best sensing performance was achieved upon exposure to blue light illumination. The best sensing performance was comparable to the counterpart performed at an elevated temperature between 200 and 250oC.