A highly responsive NH₃ sensor based on Pd-loaded ZnO nanoparticles prepared via a chemical precipitation approach.

ABSTRACT: The gas-detecting ability of nanostructured ZnO has led to significant attention being paid to the development of a unique and effective approach to its synthesis. However, its poor sensitivity, cross-sensitivity to humidity, long response/recovery times and poor selectivity hinder its practical use in environmental and health monitoring. In this context, the addition of noble metals, as dopants or catalysts to modify the ZnO surface has been examined to enhance its sensing performance. Herein, we report preparation of Pd-loaded ZnO nanoparticles via a chemical precipitation approach. Various Pd loadings were employed to produce surface-modified ZnO nanostructure sensors, and their resulting NH₃ sensing capabilities both in dry and humid environments were investigated. Through a

SUBMITTER: Mhlongo GH 

PROVIDER: S-EPMC6614408 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature