H2S threshold sensor based on percolation effects in silica/CuO nano composites for biogas plant and safety value monitoring

基于二氧化硅/氧化铜纳米复合材料渗流效应的硫化氢阈值传感器，用于沼气厂和安全值监测

• 批准号: 249960080
• 负责人: Professor Dr. Bernd Smarsly, since 1/2017
• 金额: --
• 依托单位: Physikalisch-Chemisches Institut
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/249960080?language=en
• 关键词: H2S; threshold; sensor; based; percolation

During hydrogen sulfide gas (H2S) exposure nanostructured copper oxide (CuO) shows sudden increase in electronic conduction which can be described by percolation theory. Aim of the project is the investigation and transfer of this effect to the application as threshold sensor for H2S. H2S is an important control variable for biogas plants. Preliminary investigations on thin films and nano-fibers showed that these structures are not suitable for application because of instabilities caused by migration effects. Therefore alternative systems based on CuO/silica nanocomposites are to be studied. Ordered mesoporous silica synthesized by self-organization processes and electrospun fibers respectively will be used as CuO support allowing gas access to the embedded CuO. At the same time the silica support acts as steric barrier preventing structural and functional loss caused by the before mentioned migration effects. Also the influence on the 3D-structure of the silica on the percolation properties should be investigated. Whereas the 3D-percolation thresholds of fiber based systems are in good accordance with the theoretical values the 2D film based systems deviate from the calculations. To identify the origin of this, model systems will be prepared.

在硫化氢气体（H2S）暴露期间，纳米结构的氧化铜（CuO）显示出电子传导的突然增加，这可以用逾渗理论来描述。该项目的目的是调查和转移这种效果的应用程序作为阈值传感器的H2S。H2S是沼气厂的重要控制变量。对薄膜和纳米纤维的初步研究表明，由于迁移效应引起的不稳定性，这些结构不适合应用。因此，基于CuO/二氧化硅纳米复合材料的替代系统有待研究。有序介孔二氧化硅合成的自组织过程和静电纺丝纤维分别将被用作氧化铜支持允许气体进入嵌入的氧化铜。同时，二氧化硅载体充当空间屏障，防止由前述迁移效应引起的结构和功能损失。还应研究二氧化硅的3D结构对渗滤性能的影响。纤维基系统的三维渗流阈值与理论值吻合较好，而二维薄膜基系统的渗流阈值与理论值有较大偏差。为了查明这种情况的根源，将准备模型系统。

项目成果

H 2 S dosimeter with controllable percolation threshold based on semi-conducting copper oxide thin films

• DOI: 10.5194/jsss-6-163-2017
• 发表时间: 2017-05
• 期刊: Journal of Sensors and Sensor Systems
• 影响因子: 1
• 作者: C. Seitz;Giuliana Beck;J. Hennemann;C. Kandzia;K. Hering;A. Polity;P. Klar;Andrej Paul;T. Wagner;S. Russ;B. Smarsly

CuO thin films for the detection of H2S doses: Investigation and application

• DOI: 10.1002/pssa.201431735
• 发表时间: 2015-06-01
• 期刊: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
• 影响因子: 2
• 作者: Hennemann, Joerg;Kohl, Claus-Dieter;Wagner, Thorsten
• 通讯作者: Wagner, Thorsten

Electrospun CuO Nanofibre Assemblies for H2S Sensing

• DOI: 10.1515/zpch-2017-1097
• 发表时间: 2019-01-01
• 期刊: ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
• 影响因子: 2.5
• 作者: Seitz, Christoph;Werner, Sebastian;Smarsly, Bernd M.
• 通讯作者: Smarsly, Bernd M.

4.2.3 - H2S-Dosimeter mit einstellbarer Schaltschwelle auf Basis von Kupferoxid Halbleiterschichten

4 2 3 - 基于氧化铜半导体层的具有可调开关阈值的 H2S 剂量计

• DOI: 10.5162/sensoren2016/4.2.3
• 发表时间: 2016
• 作者: C. Seitz;G. Beck;J. Hennemann;B. Smarsly;C. Kandzia;P. Hering;A. Polity;A. Paul;T. Wagner;S. Russ
• 通讯作者: S. Russ

Copper Oxide/Silica Nanocomposites for Selective and Stable H2S Gas Detection

• DOI: 10.1021/acsanm.9b01004
• 发表时间: 2019-06-01
• 期刊: ACS APPLIED NANO MATERIALS
• 影响因子: 5.9
• 作者: Paul, Andrej;Weinberger, Christian;Wagner, Thorsten
• 通讯作者: Wagner, Thorsten