铈掺杂ETS-10增强甲烷C-H键的光催化活性
Enhanced photocatalytic activation of methane C-H bond by Incorporate Cerium into ETS-10
摘要：
制备了Ce-ETS-10催化剂，并对其催化甲烷偶联反应性能进行了研究。Ce改性提高了ETS-10催化剂的甲烷转化性能，甲烷转化可以在可见光照射下进行。为研究不同稀土元素对ETS-10的改性，将不同稀土元素引入到ETS-10分子筛中，研究了其光催化甲烷转化性能。采用多种表征方法研究稀土变质行为。SPS测试结果表明，铈改性后产生了可见光电压，这意味着强烈的电子-空穴分离，提高了光催化性能。电荷空穴分离是非传统的n-n异质结，因为电荷空穴分离在原子尺度上是高度取向的和有效的。该机理对甲烷转化反应有明显的促进作用。
英文摘要：
Ce-ETS-10 was prepared and their ability on photocatalysis coupling of methane has been studied in detail. Ce modification enhanced the photocatalysis performance of ETS-10 on methane conversion reaction, and the methane conversion can be carried out under irradiation of visible light. To study the various rare earth modification to ETS-10, various rare earth elements were introduced to ETS-10 molecular sieve, and the relative photocatalytic methane conversion performance were studied. Various characterizations were applied to examine rare earth modification behavior. The SPS results show that the Cerium modification induce visible light photovoltage, which means the strong electron-hole separation which enhance the photocatalytic performance. The charge-hole separation is non-traditional n-n heterojunction for the charge-hole separation is highly oriented and efficient at atomic scale. This mechanism shows significant enhancement for methane conversion reaction.
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