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中文摘要：
以液相离子交换法制备的 NiY （L-NiY）分子筛为研究对象,运用N2吸附表征其织构性能；采用原位红外光谱技术以吡啶（Py）、2,6-二甲基吡啶（DTPy）、2,6-二叔丁基吡啶（DTPy）为探针分子考察分子筛表面酸性及其超笼桥羟基B酸位的可接近性。结果表明,经改性后的 L-NiY表面产生了介孔结构的缺陷位；原位红外光谱结果表明,L-NiY超笼桥中的桥羟基为强B酸中心,且这些 B酸中心的可接近性存在一定的差异性,其中位于缺陷位处的B酸位具有较优异的可接近性。
英文摘要：
Acidity and accessibility of L-NiY were characterized by in situ FTIR spectroscopy with pyridine （Py）,2,6-dimethylpyridine （DTPy）and 2,6-di-tert-butylpyridine （DTBPy）as the probing molecules,and the texture properties were characterized by N2 adsorption method.The textual property results indicate thatmesoporous defect positions exist in the prepared L-NiY zeolites.The in situ FTIR results imply that hydroxyl are strong Br？nsted acid in supercages of the L-NiY zeolites.The accessibility of the Br？nstedacid sites is different,and the ones in the defect positions show the more excellent accessibility.
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