Porous heterostructured clays - recent advances and challenges - revisão

Porous heterostructured clays - PCHs - are lamellar solids with acid and adsorptive properties serving as catalysts or catalyst supports formed on a template mechanism. This work provides information about porous heterostructured clays. Historical aspects of the development of lamellar solids to porous heterostructured clays will be discussed, and detailed information on synthesis and applicationaspects, as well as on the influence of eachreagent on these materials and the characterization techniques used to prove their formation will be given.

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ChemInform Abstract: Recent Advances in Zeolite Science Based on Advance Characterization Techniques

ChemInform ◽

10.1002/chin.201422222 ◽

2014 ◽

Vol 45 (22) ◽

pp. no-no

Author(s):

Eyas Mahmoud ◽

Raul F. Lobo

Keyword(s):

Characterization Techniques ◽

Recent Advances

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Recent Advances on TiO2‐ZrO2Mixed Oxides as Catalysts and Catalyst Supports

Catalysis Reviews ◽

10.1081/cr-200057488 ◽

2005 ◽

Vol 47 (2) ◽

pp. 257-296 ◽

Cited By ~ 211

Author(s):

Benjaram M. Reddy ◽

Ataullah Khan

Keyword(s):

Catalyst Supports ◽

Recent Advances

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Recent Advances in the Application of Characterization Techniques for Studying Physical Stability of Amorphous Pharmaceutical Solids

Crystals ◽

10.3390/cryst11121440 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1440

Author(s):

Yanan Wang ◽

Yong Wang ◽

Jin Cheng ◽

Haibiao Chen ◽

Jia Xu ◽

...

Keyword(s):

Physical Stability ◽

Crystalline Form ◽

Pharmaceutical Solids ◽

Amorphous Form ◽

Broadband Dielectric Spectroscopy ◽

Characterization Techniques ◽

Surface Grating ◽

Recent Advances ◽

Amorphous Drugs ◽

Crystalline Forms

The amorphous form of a drug usually exhibits higher solubility, faster dissolution rate, and improved oral bioavailability in comparison to its crystalline forms. However, the amorphous forms are thermodynamically unstable and tend to transform into a more stable crystalline form, thus losing their advantages. In order to investigate and suppress the crystallization, it is vital to closely monitor the drug solids during the preparation, storage, and application processes. A list of advanced techniques—including optical microscopy, surface grating decay, solid-state nuclear magnetic resonance, broadband dielectric spectroscopy—have been applied to characterize the physicochemical properties of amorphous pharmaceutical solids, to provide in-depth understanding on the crystallization mechanism. This review briefly summarizes these characterization techniques and highlights their recent advances, so as to provide an up-to-date reference to the available tools in the development of amorphous drugs.

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Recent advances in functional mesoporous graphitic carbon nitride (mpg-C3N4) polymers

Nanoscale ◽

10.1039/c7nr03656f ◽

2017 ◽

Vol 9 (30) ◽

pp. 10544-10578 ◽

Cited By ~ 103

Author(s):

Shaodong Sun ◽

Shuhua Liang

Keyword(s):

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Fundamental Properties ◽

Characterization Techniques ◽

Recent Advances ◽

Potential Applications ◽

Emerging Issues

In this review, we selectively summarize the recent advances in mesoporous g-C3N4(mpg-C3N4), including synthesis strategies, characterization techniques, fundamental properties, functional modifications and potential applications. Several difficulties and emerging issues are also proposed.

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