用于新型低温高性能 HS 传感器的异质结构 (SrBi)BiO/ZnO。

Heterostructural (SrBi)BiO/ZnO for novel high-performance HS sensor operating at low temperature.

机构信息

Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, and Key Lab of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China; Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China.

Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, and Key Lab of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China.

出版信息

J Hazard Mater. 2021 Jul 15;414:125500. doi: 10.1016/j.jhazmat.2021.125500. Epub 2021 Feb 23.

DOI:10.1016/j.jhazmat.2021.125500

PMID:33647623

Abstract

Exploring novel sensing materials enabling selective discrimination of trace ambient HS at lower temperature is of utmost importance for diverse practical applications. Herein, heterostructural (SrBi)BiO/ZnO (SBO/ZnO) nanomaterials were proposed. Synergetic effect of promoting analyte adsorption (via multiplying oxygen vacancy defects) and reversible sulfuration-desulfuration reaction induced unique band alignment among SBO/ZnO/ZnS, contributes to the sensitive and selective response toward HS molecules. Novel SBO/ZnO (10%) sensor possesses excellent sensing HS performances, including a high response (107.6 for 10 ppm), low limit of detection of 20 ppb, good selectivity and long-term stability. Together with the merits of low operation temperature of 75 °C and weak humidity dependence (endowed by the hydrophobic SBO), present heterostructural SBO/ZnO sensor paves the way for the practical monitoring of trace HS pollutants in diverse workplaces including petroleum and natural gas industries.

摘要

探索新型传感材料，以便在较低温度下选择性地检测痕量环境 HS，对于各种实际应用至关重要。在此，提出了具有异质结构的（SrBi）BiO/ZnO（SBO/ZnO）纳米材料。SBO/ZnO/ZnS 之间的促进分析物吸附（通过增加氧空位缺陷）和可逆硫化-脱硫反应的协同效应，导致了独特的能带排列，从而对 HS 分子表现出敏感和选择性的响应。新型 SBO/ZnO（10%）传感器具有出色的 HS 传感性能，包括高响应（10 ppm 时为 107.6）、低检测限为 20 ppb、良好的选择性和长期稳定性。结合 75°C 的低工作温度和弱湿度依赖性（由疏水性 SBO 赋予）的优点，本征异质结构 SBO/ZnO 传感器为包括石油和天然气工业在内的各种工作场所中痕量 HS 污染物的实际监测铺平了道路。