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Direct-continuous preparation of nanostructured titania-silica using surfactant-free non-scaffold rice starch template

Matmin, J. and Affendi, I. and Endud, S. (2018) Direct-continuous preparation of nanostructured titania-silica using surfactant-free non-scaffold rice starch template. Nanomaterials, 8 (7). ISSN 2079-4991

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Official URL: http://dx.doi.org/10.3390/nano8070514

Abstract

The conventional synthesis route of nanostructured titania-silica (Ti-SiNS) based on sol-gel requires the use of a surfactant-type template that suffers from hazardous risks, environmental concerns, and a tedious stepwise process. Alternatively, biomaterials have been introduced as an indirect template, but still required for pre-suspended scaffold structures, which hinder their practical application. Herein, we report an easy and industrially viable direct-continuous strategy for the preparation of Ti-SiNS from nanostructured-silica (SiNS) using a hydrolyzed rice starch template. This strategy fits into the conventional industrial process flow, as it allows starch to be used directly in time-effective and less complicated steps, with the potential to upscale. The formation of Ti-SiNS is mainly attributed to Ti attachment in the SiNS frameworks after the polycondensation of the sol-gel composition under acidic-media. The SiNS had pseudo-spherical morphology (nanoparticles with2·g the size of 13 to 22 nm), short order crystal structure (amorphous) and high surface area (538.74 m−1). The functionalized SiNS into Ti-SiNS delivered considerable catalytic activity for epoxidation of 1-naphtol into 1,4-naphthoquinone. The described direct-continuous preparation shows great promise for a cheap, green, and efficient synthesis of Ti-SiNS for advanced applications.

Item Type:Article
Uncontrolled Keywords:Direct-continuous preparation, Nanostructured silica, Non-scaffold template, Sol-gel synthesis, Surfactant-free
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:79697
Deposited By: Fazli Masari
Deposited On:28 Jan 2019 06:38
Last Modified:28 Jan 2019 06:38

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