| XRD法研究CrO3与NaY、NaM分子筛的表面相互作用 |
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| 引用本文： | 祁学永,王娅娟,杨孔章. XRD法研究CrO3与NaY、NaM分子筛的表面相互作用[J]. 物理化学学报, 1997, 13(10): 938-941. DOI: 10.3866/PKU.WHXB19971015 |
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| 作者姓名： | 祁学永 王娅娟 杨孔章 |
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| 作者单位： | Department of Chemistry,Shandong Institute of Education,Jinan 250013,Institute of Colloid and Interface Chemistry,Shandong University,Jinan 250100 |
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| 摘 要： | 负载于多孔性、高比表面载体上的三氧化铝是重要的工业催化剂，多年来人们对催化剂中Croa的存在状态以及与载体的相互作用进行了广泛的研究［‘－4］，发现CrO。能在载体表gn散成非晶相的表面化合物，非晶相Cr（VI）具有较高的催化活性．我们曾经对MoO。／NaY，MoO。／NaM体系进行过系统的研究，发现MOO。与分子筛载体间存在强表面相互作用［’］．在此研究基础上，选择了CrO3／NaY、CrO。／NaM体系，采用XRD法对上述体系进行了研究．结果表明170oC下晶相CrO。能在NaY、NaM分子筛上自发分散成非晶相Cr（VI），且分散量大．C…
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| 关 键 词： | X射线衍射法 三氧化铬 NaY分子筛 NaM分子筛 相互作用 |
| 收稿时间： | 1997-01-14 |
| 修稿时间： | 1997-04-15 |
XRD Studies on the Interaction between CrO_3 and NaY,NaM Zeolites |
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| Qi Xueyong ,Wang Yajuan. XRD Studies on the Interaction between CrO_3 and NaY,NaM Zeolites[J]. Acta Physico-Chimica Sinica, 1997, 13(10): 938-941. DOI: 10.3866/PKU.WHXB19971015 |
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| Authors: | Qi Xueyong Wang Yajuan |
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| Affiliation: | Department of Chemistry,Shandong Institute of Education,Jinan 250013|Institute of Colloid and Interface Chemistry,Shandong University,Jinan 250100 |
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| Abstract: | CrO3/NaY and CrO3/NaM zeolite systems have been studied by X-ray diffraction (XRD). CrO3/NaY(or CrO3/NaM) samples with various amounts of CrO3 were prepared by mixing CrO3 and NaY(or NaM) in dry atmosphere, and by baking at 170 ℃ for 24 hours. The results showed that CrO3 could disperse spontaneously onto NaY, NaM zeolites as a non-crystalline layer during baking. The framework of NaY and NaM zeolites was destroyed by the dispersed CrO3 because of the strong surface interaction. The crystallinity of NaY(or NaM) decreased with the increase of CrO3 loading. |
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| Keywords: | X-ray diffraction method Chromium trioxide NaY zeolite NaM zeolite Interaction |
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