Increasing sensitivity of ZnO nanoparticles by hydrogenation and sensing reaction mechanism
Increasing sensitivity of ZnO nanoparticles by hydrogenation and sensing reaction mechanism
复制标题
通过氢化和传感反应机制提高 ZnO 纳米粒子的灵敏度
DOI:
10.1007/s10854-019-02117-y
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发表时间:
2019-10
期刊:
影响因子:
--
通讯作者:
Heqing Yang
中科院分区:
文献类型:
--
作者:
Cuijin Pei;Bin Liu;Junfang Liu;Yukun Yuan;Miao Wang;Ye Wang;Hua Zhao;Heqing Yang
Sensing reaction mechanism is decisive for improvement of the sensing property of metal oxide sensing materials. Herein, we demonstrated a conceptually different approach to improving sensing property of ZnO nanoparticles by increasing quantity of the surface unsaturated 3-coordinated Zn atoms through hydrogenation. The surface 3-coordinated Zn atoms play a pivotal role in sensing reaction. They can produce electrons, adsorb O2and catalyze the gas sensing reaction between the adsorbed oxygen and test gas. A sensing mechanism of the unsaturated Zn atom serving as a sensing reactive site is presented for the first time. The mechanism provides a deep understanding for sensing and catalytic reaction mechanisms. In addition, the sensing performance of other sensing materials and reactive activity of catalysts may be enhanced by increasing concentration of surface unsaturated metal atom through hydrogenation.
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