Enhancement of photocatalytic property of ZnO for gaseous formaldehyde degradation by modifying morphology and crystal defect
Enhancement of photocatalytic property of ZnO for gaseous formaldehyde degradation by modifying morphology and crystal defect
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通过改变形貌和晶体缺陷增强ZnO光催化降解气态甲醛的性能
DOI：
10.1016/j.jallcom.2012.09.109
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发表时间：
2013-02
影响因子：
6.2
通讯作者：
Huang, Qingwu
中科院分区：
文献类型：
--
作者：
Liao, Yichuan;Xie, Changsheng;Liu, Yuan;Huang, Qingwu
通过对ZnO的形貌和晶体缺陷的修饰，提高了其光催化降解甲醛气体的性能。采用液相法在低温下制备了不同缺陷含量的六棱柱形、短六棱锥形和长六棱锥形ZnO。在500°C下，用Ar和H2混合气体对所制备的ZnO进行热处理5 h和10 h。利用ZnO光致发光（PL）的多峰高斯拟合表征了缺陷态。LSP-10 h ZnO在紫外光照射下的降解效率大于商品TiO 2（P25）。SP-10 h ZnO在紫外光照射下的降解效率与TiO 2相当。SP-10 h ZnO和LSP-10 h ZnO在白色光照下的降解效率接近于TiO 2。详细讨论了ZnO的形貌、缺陷态与光催化性能之间的关系。
We have improved the photocatalytic property of ZnO for gaseous formaldehyde degradation by modifying morphology and crystal defect. Six prisms (SP), short six pyramids (SSP) and long six pyramids (LSP) shape ZnO with different defect contents were prepared by the liquid phase method at low temperatures. The as-prepared ZnO were heat-treated with the gas mixture of Ar and H2at 500°C for 5 and 10h. The defect states were characterized by multi-peaks Gaussian fitting of photoluminescence (PL) of ZnO. The degradation efficiency of LSP-10h ZnO under ultraviolet illumination was larger than that of commercial TiO2(P25). The degradation efficiency of SP-10h ZnO under ultraviolet illumination was comparable to that of TiO2. The degradation efficiency of SP-10h ZnO and LSP-10h ZnO under white illumination were approached to that of TiO2. The relationships between the morphologies, the defect states and the photocatalytic properties of as-prepared ZnO were discussed in detail.
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DOI：
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