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Nanometer titanium dioxide-silicon dioxide composite photocatalyst, and preparation method thereof

A nano-titanium dioxide, silicon dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the bottleneck of titanium dioxide nanomaterial research, corrosion of organic carriers, low photocatalytic activity, etc. problem, to achieve the effect of excellent photocatalytic effect

Active Publication Date: 2017-05-03
HANGZHOU TONG KING ENVIRONMENT TECH CO LTD
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Problems solved by technology

[0002] Titanium dioxide photocatalytic nanomaterials have been widely used in applications. However, due to their low photocatalytic activity and corrosion of organic supports, research on titanium dioxide nanomaterials has encountered bottlenecks.

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  • Nanometer titanium dioxide-silicon dioxide composite photocatalyst, and preparation method thereof

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] see figure 1 , The invention provides a method for preparing a nano-titanium dioxide-silicon dioxide composite photocatalyst with a core-shell structure. This preparation method comprises the steps:

[0033] Step S101, preparing a nano-titanium dioxide-carbon-silica composite with a core-shell structure, wherein the nano-titanium dioxide is the core, the carbon is the middle layer, and the silicon dioxide is coated on the surface of the carbon to form a shell;

[0034] Specifically, the nano-titanium dioxide-carbon-silicon dioxide composite is prepared by the following steps:

[0035] Prepare spherical titanium dioxide nanopowder;

[0036] Carrying out carbon coating on the spherical titanium dioxide nanopowder to form nano titanium dioxide-carbon precipitates;

[0037] The nano titanium dioxide-carbon precipitate is coated with silicon dio...

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Abstract

The invention provides a preparation method for a nanometer titanium dioxide-silicon dioxide composite photocatalyst with a core shell structure. The preparation method comprises the following steps: (1) preparing a nanometer titanium dioxide-carbon-silicon dioxide compound with a core shell structure; (2) arraying the nanometer titanium dioxide-carbon-silicon dioxide compound with the core shell structure on a prepreg so as to form a single-layer structure; (3) corroding the prepreg with the nanometer titanium dioxide-carbon-silicon dioxide compound by using steam of a corrosive agent to remove a part of silicon dioxide shells in the nanometer titanium dioxide-carbon-silicon dioxide compound so as to form openings; (4) subjecting the corroded nanometer titanium dioxide-carbon-silicon dioxide compound to high-temperature oxidation to remove interlayer carbon so as to obtain the nanometer titanium dioxide-silicon dioxide composite photocatalyst with the core shell structure. The invention also provides the nanometer titanium dioxide-silicon dioxide composite photocatalyst with the core shell structure prepared by using the method.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a nano-titanium dioxide-silicon dioxide composite photocatalyst and a preparation method thereof. Background technique [0002] Titanium dioxide photocatalytic nanomaterials have been widely used in applications. However, due to their low photocatalytic activity and corrosion of organic supports, research on titanium dioxide nanomaterials has encountered a bottleneck. Therefore, how to ensure that the photocatalyst does not corrode the organic support and maintain its high photocatalytic activity when it is loaded is a key issue in the study of titanium dioxide nanomaterials. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a nano-titanium dioxide-silicon dioxide composite photocatalyst and its preparation method, which can effectively ensure that the photocatalyst does not corrode the organic carrier while mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18
CPCB01J21/18B01J35/40B01J35/51B01J35/39
Inventor 王晟王騊欧阳申珅
Owner HANGZHOU TONG KING ENVIRONMENT TECH CO LTD
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