钛硅石的结构和物理化学特征

IF 9.3 2区 化学 Q1 CHEMISTRY, PHYSICAL Catalysis Reviews-Science and Engineering Pub Date : 1997-08-01 DOI:10.1080/01614949709353777
G. Vayssilov
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引用次数: 244

摘要

摘要本文对钛硅石中钛离子的状态和配位的大量信息进行了比较和讨论。本文综述了近年来用光谱、电化学和量子化学方法对硅钛矿进行结构表征的结果,重点研究了钛离子在框架或框架外的位置、它们的配位以及一些光谱特征与具体结构在原子水平上的关系。测定钛硅石样品某些特定特征的主要方法是考虑金属离子杂质的存在、框架外二氧化钛、酸度、疏水性、扩散和其他空间限制。讨论了这些性质如何影响样品的催化活性和选择性的推测。本文还介绍了溶剂、水、过氧化氢等分子与硅钛石相互作用的实验结果。…
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Structural and Physicochemical Features of Titanium Silicalites
Abstract The review presents a comparison and discussion of the substantial amount of information about the state and coordination of titanium ions in titanium silicalites. The results from structural characterization of titanium silicalites with spectral, electrochemical, and quantum-chemical methods with emphasis on location of the Ti ions in framework or extraframework positions, their coordination, and the relationship of some spectral features to concrete structures at the atomic level are summarized. The main methods for the determination of some specific characteristics of titanium silicalite samples are considered—presence of metal ion impurities, extraframework titania, acidity, hydrophobicity, diffusion, and other sterical restrictions. Speculations on how these properties influence the catalytic activities and selectivities of the samples are discussed. Some experimental results for interaction of molecules—solvents, water, and hydrogen peroxide—with titanium silicalites are also presented. The...
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来源期刊
CiteScore
22.30
自引率
2.80%
发文量
29
期刊介绍: Catalysis Reviews is dedicated to fostering interdisciplinary perspectives in catalytic science and engineering, catering to a global audience of industrial and academic researchers. This journal serves as a bridge between the realms of heterogeneous, homogeneous, and bio-catalysis, providing a crucial and critical evaluation of the current state of catalytic science and engineering. Published topics encompass advances in technology and theory, engineering and chemical aspects of catalytic reactions, reactor design, computer models, analytical tools, and statistical evaluations.
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