Ordered mesoporous ZnO for gas sensing

• DOI: 10.1016/j.tsf.2007.03.021
• Publication Date: 2007-03-19T16:52:09Z
• Authors: T. Wagner; T. Waitz; J. Roggenbuck; M. Fröba; C.-D. Kohl; M. Tiemann
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract We report on the synthesis and the gas-sensing properties (CO and NO2 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.