Controllable synthesis of mesoporous titanosilicates for styrene oxidization using a nanocellulose template strategy

Abstract

A nanocellulose-template strategy is reported for the controllable synthesis of mesoporous titanosilicates as efficient catalysts for the oxidization of styrene.

Cellulose nanocrystals (CNCs) as hard templates for preparing mesoporous zeolite Y assemblies with high catalytic activity

“…hydroxyl groups), making them ideal as templates in preparing composite materials, which is exemplified by the work on CNCs-templated mesoporous amorphous silicates. [21][22][23][24] Unlike the conventional carbon materials, CNCs are intrinsically compatible with zeolite synthesis protocols due to their reactive surfaces and hydrophilicity as a result of the hydroxyl groups on their crystalline facets. Previous research showed that, in the process of zeolite crystallisation, cellulose in the vegetal fibres is the reactive component, rather than lignin and pectin, which interacts with the aluminosilicate species, and hence promotes the formation of zeolite nuclei.…”

Robust Mg(Ca)Zr-Doped Acid–Base Bifunctional Mesoporous Silica and Their Applications in the Deacetalization-Knoevenagel Reaction

“…The absorption at 459 cm –1 is related to the silanol bending, and the vibration of asymmetric and symmetric stretching vibrations of Si–O–Si are assigned to the bands at 1084 and 801 cm –1 , respectively. − These characteristics also indicated the retention of the original structure, meaning the prepared bifunctional catalysts can preserve the merits of the mesoporous silica supports. Meanwhile, a band at 969 cm –1 for the obtained samples could be explained as the framework Si–O–M vibrations, reflecting the incorporation of the metal species into the silica framework. , The band at 1647 cm –1 corresponded to the hydroxyl deformation mode on the material surface …”

“…Meanwhile, a band at 969 cm −1 for the obtained samples could be explained as the framework Si−O−M vibrations, reflecting the incorporation of the metal species into the silica framework. 42,43 The band at 1647 cm −1 corresponded to the hydroxyl deformation mode on the material surface. 44 The N 2 adsorption−desorption test and the detailed textural parameters of the prepared samples are displayed in Table 1.…”

Recent Investigation on Epoxidation of Styrene with Hydrogen Peroxide by Heterogeneous Catalysis

“…Dazhi Shen et al [70] applied a nanocellulose template strategy to synthesize mesoporous titanosilicates for styrene epoxidation. Firstly, treated cotton with H 2 SO 4 to generate nanocellulose.…”