College of Materials and Chemical Engineering, State Laboratory of Surface and Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China.
ACS Appl Mater Interfaces. 2012 Aug;4(8):3797-804. doi: 10.1021/am3010303. Epub 2012 Aug 10.
Porous and single crystalline ZnO nanosheets, which were synthesized by annealing hydrozincite Zn(5)(CO(3))(2)(OH)(6) nanoplates produced with a water/ethylene glycol solvothermal method, are used as building blocks to construct functional Pd-ZnO nanoarchitectures together with Pd nanoparticles based on a self-assembly approach. Chemical sensing performances of the ZnO nanosheets were investigated carefully before and after their surface modification with Pd nanoparticles. It was found that the chemical sensors made with porous ZnO nanosheets exhibit high selectivity and quick response for detecting acetone, because of the 2D ZnO nanocrystals exposed in (100) facets at high percentage. The performances of the acetone sensors can be further improved dramatically, after the surfaces of ZnO nanosheets are modified with Pd nanoparticles. Novel acetone sensors with enhanced response, selectivity and stability have been fabricated successfully by using nanoarchitectures consisting of ZnO nanosheets and Pd nanoparticles.
多孔和单晶 ZnO 纳米片，通过水/乙二醇溶剂热法制备的水锌矿 Zn(5)(CO(3))(2)(OH)(6)纳米片退火合成，被用作构建块，与基于自组装方法的 Pd 纳米粒子一起构建功能性 Pd-ZnO 纳米结构。在 Pd 纳米粒子表面修饰前后，仔细研究了 ZnO 纳米片的化学传感性能。结果发现，由于在高百分比下暴露在 (100) 面上的 2D ZnO 纳米晶体，多孔 ZnO 纳米片制成的化学传感器对丙酮具有高选择性和快速响应。在 ZnO 纳米片表面用 Pd 纳米粒子修饰后，丙酮传感器的性能可以显著提高。通过使用由 ZnO 纳米片和 Pd 纳米粒子组成的纳米结构，成功地制备了具有增强的响应、选择性和稳定性的新型丙酮传感器。
