Effect of the acid activation on a layered titanosilicate AM-4: The fine-tuning of structural and physicochemical properties

被引：9

作者：

Timofeeva, Maria N. ^{[1
,2
]}

Kalashnikova, Galina O. ^{[3
]}

Shefer, Kristina, I ^{[1
]}

Mel'gunova, Elena A. ^{[1
]}

Panchenko, Valentina N. ^{[1
,2
]}

Nikolaev, Anatoliy, I ^{[3
]}

Gil, Antonio ^{[4
]}

机构：

[1] Boreskov Inst Catalysis SB RAS, Prospekt Akad Lavrentieva 5, Novosibirsk 630090, Russia

[2] Novosibirsk State Tech Univ, Prospekt K Marksa 20, Novosibirsk 630092, Russia

[3] Russian Acad Sci, Nanomat Res Ctr, Kola Sci Ctr, 14 Fersman St, Apatity 184209, Russia

[4] Univ Publ Navarra, INAMAT Sci Dept, Pamplona 31006, Spain

来源：

APPLIED CLAY SCIENCE | 2020年 / 186卷

关键词：

Layered titanosilicate AM-4; Acid treatment; 1,5-benzodiazepine; 1,2-phenylenediamine; Cyclocondensation reaction; SODIUM TITANIUM SILICATE; ZEOLITES; CATALYSTS; DEALUMINATION; EPOXIDATION; ADSORPTION; EXCHANGE; ETS-10; TIO2; TS-1;

D O I：

10.1016/j.clay.2020.105445

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work we investigated the microporous layered titanosilicate AM-4 (Aveiro-Manchester material number 4) of a synthetic analogous the mineral Lintisite having edge-shared brookite-type TiO6 chains. The objective of our work was to verify the effects of the acid activation on the AM-4 properties, treated with 0.0625-0.25 M HNO3. The results of the physicochemical characterization by SEM, XRD, IR and DR UV-vis spectroscopy, nitrogen adsorption/desorption at 77 K have provided evidences that texture, chemical composition, structural and physicochemical properties of AM-4 could be adjusted by treatment with 0.0625-0.25 M HNO3. According to the method of mass titration, surface acidity (pHPZC) of AM-4 roses with increasing HNO3 concentration, which was in accord with the increase of the reaction rate and yield of 1,5-benzodiazepine in the reaction of cyclocondansation between 1,2-phenylenediamine and acetone.

引用

页数：8

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