title: Improved H2S gas sensing properties of ZnO nanorods decorated by a several nm ZnS thin layer.
abstract: To avoid a spontaneous reaction between ZnO gas sensing materials and detected H2S gas, ZnO nanorods decorated with a several nm ZnS thin layer were designed. The ZnS-decorated layer was prepared by passivating oriented ZnO nanorods in a H2S atmosphere. The effect of the passivation processes on the H2S sensing properties was investigated. It was found that ZnO nanorods decorated with a 2 nm-thick ZnS layer possessed a repeatable and superior response to ppm-level H2S at room temperature. Moreover, a confinement effect was proposed to explain the improved sensing properties of the decorated ZnO nanorods.
authors.affiliation: School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China. qigaocan123@163.com anqieryajingdou@163.com.
authors.forename: Gaocan
authors.initials: G
authors.lastname: Qi
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhihao
authors.initials: Z
authors.lastname: Yuan
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D003198:Computer Simulation; D003217:Conductometry / Q000295:instrumentation*; D004784:Environmental Monitoring / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006862:Hydrogen Sulfide / Q000032:analysis* / Q000737:chemistry; D008956:Models, Chemical; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D013440:Sulfides / Q000737:chemistry*; D014159:Transducers; D017967:Zinc Compounds / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D013440:Sulfides; D017967:Zinc Compounds; C031238:zinc sulfide; D015034:Zinc Oxide; D006862:Hydrogen Sulfide