Investigation on Trimethylamine Sensing Performance of PdO-Decorated ZnO Flower-Like Structures Synthesized by One-Step Hydrothermal Method

摘要

ZnO and PdO-decorated ZnO flower-like structures have been synthesized using a facile one-step hydrothermal method followed by subsequent calcination.Then,their structural information and trimethylamine(TMA)sensing performance were investigated.The results exhibited that the diameter of these ZnO flower-like structures was in the range of 3–7 μm.Its morphology was maintained after introducing PdO nanoparticales.By comparing the sensing properties,it is found that sensors based on PdO-decorated ZnO flower-like structures showed higher TMA response than that of pure one.Especially,the sensor fabricated by 1 mol% PdO-decorated ZnO flowerlike structures displayed superior gas sensing performances including high response,rapid response/recover characteristics,good stability,and high selectivity.Such a superior sensing performance is mainly due to the chemical and electrical sensitization of PdO nanoparticles.This simple synthesis strategy and a desirable TMA sensing performance could be broadly developed other metallic doped metal oxide flowerlike structures as high performance sensing materials.