Studies on the synthesis of titanium silicalite, TS-1

Thangaraj, A.; Eapen, M. J.; Sivasanker, S.; Ratnasamy, P.

doi:10.1016/0144-2449(92)90159-m

Cited by 217 publications

(142 citation statements)

References 10 publications

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“…[1][2][3][4][5] The classical method was used to produce TS-1 with the crystal size of 100-200 nm, which exhibited good catalytic properties. However, the template tetrapropyl ammonium hydroxide (TPAOH) used in the classical method is expensive, which restrains its applications in industry.…”

Section: Introductionmentioning

confidence: 99%

The effect of acid treatment on the active sites and reaction intermediates of the low-cost TS-1 in propylene epoxidation

et al. 2017

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This study investigated the roles of the different titanium species of low-cost TS-1 in propylene epoxidation and the influence of acid treatments. The low-cost TS-1 zeolites with different titanium species were synthesized using the hydrothermal method and characterized by ultraviolet (UV)-Raman, X-Ray Diffraction (XRD), ultraviolet visible diffuse reflectance spectroscopy (UV-Vis), N 2 physical absorption and NH 3 temperature programmed desorption (NH 3 -TPD) techniques. The roles of the different titanium species in the low-cost TS-1 samples were investigated by gas chromatography-Raman spectrometry (GC-Raman) during the propylene epoxidation process. The framework titanium species was found to be active for propylene epoxidation, while the extra-framework Ti species were found to be harmful for propylene epoxidation due to their acidity. The extra-framework Ti species can be removed by acid treatments. It was found that the acid treatment of the as-synthesized TS-1 is more effective since the amorphous TiO 2 was not transformed into anatase TiO 2 upon calcination. Strong acids, such as HCl, HNO 3 and H 2 SO 4 , are more efficient for the elimination of the extra-framework TiO 2 , but do not significantly affect the framework titanium species. After treatment with an acid of a suitable concentration, the amount of the active intermediate species Ti-OOH(h 2 ) can be increased, and a higher conversion of propylene and yield of PO can be achieved.

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Section: Introductionmentioning

confidence: 99%

The effect of acid treatment on the active sites and reaction intermediates of the low-cost TS-1 in propylene epoxidation

et al. 2017

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“…Metal oxide nanoparticles may potentially be inexpensive alternatives to carbon nanotubes with superior properties for many applications including catalysis, separation, gas storage, energy conversion, drug release, sensing and environmental protection, and biocompatible nanocomposites. The modified form of TiO 2 composites such as TiO 2 -SiO 2 , TiO 2 /SiO 2 are interest for their potential application, such as electrolytes in dye-sensitized solar cells, anti reflection coating, photocatalysts and so on [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of (AR) Multilayer Thin Film for Solar Cell Application

Gopinathan¹

2013

IOSR-JAC

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“…[7,8] HP is a versatile and environmentally friendly oxidant. [9] However, as the existing manufacturing processes for HP production are very complex, expensive, and energy-intensive, it is a relatively expensive reagent [10] and price has become an obstacle to the route's commercial acceptance. [11] One of the best ways to reduce this cost is to generate HP in situ from H 2 and O 2 .…”

Section: Introductionmentioning

confidence: 99%

NHTS: A Hollow, Noble‐Metal‐Modified Titanium Silicalite

et al. 2009

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The major drawback of direct oxidation technology (onsite hydrogen peroxide production followed by its conversion into organic oxides without refining) is the design and preparation of the bifunctional catalysts used therein. Herein we present a bifunctional catalytic material (NHTS), which is synthesized by a revised semi-in-situ method that allows a noble metal to be distributed throughout the titanosilicate framework and also results in a redistribution of active Ti species throughout the crystals, thereby enriching the sur-

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Studies on the synthesis of titanium silicalite, TS-1

Cited by 217 publications

References 10 publications

The effect of acid treatment on the active sites and reaction intermediates of the low-cost TS-1 in propylene epoxidation

The effect of acid treatment on the active sites and reaction intermediates of the low-cost TS-1 in propylene epoxidation

Optical Properties of (AR) Multilayer Thin Film for Solar Cell Application

NHTS: A Hollow, Noble‐Metal‐Modified Titanium Silicalite

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