Ordered mesoporous ZnO for gas sensing

• Published in: Thin solid films Vol. 515; no. 23; pp. 8360 - 8363
• Main Authors: Wagner, T., Waitz, T., Roggenbuck, J., Fröba, M., Kohl, C.-D., Tiemann, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 14-09-2007; Elsevier Science
• Subjects: Exact sciences and technology; Gas sensor; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Mesoporous; Physics; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; ZnO; Mesoporous; ZnO; Gas sensor; DNA replication; Porous materials; Zinc nitrates; Inorganic adsorbent; XRD; Physisorption; Precursor; Mesoporosity; Zinc oxides; Self organization; Carbon monoxide; Nitrogen dioxide; Gas sensors; Gas detector
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2007.03.021

We report on the synthesis and the gas-sensing properties (CO and NO
2 detection) of mesoporous zinc oxide. A two-step structure replication method for the synthesis is employed. In the first step mesoporous SBA-15 silica is prepared by the utilization of self-organization of amphiphilic organic agents. This mesoporous silica is used as the structure matrix for synthesizing mesoporous carbon CMK-3, which, in turn, is employed for yet another replication step, using zinc nitrate as the precursor. The resulting material is characterized by X-ray diffraction and nitrogen physisorption and its gas-sensing properties are compared with a non-porous ZnO sample.