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Nano 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, low photocatalytic activity, corrosion of organic carriers, etc. problem, to achieve the effect of excellent photocatalytic effect

Active Publication Date: 2019-07-09
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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  • Nano titanium dioxide-silicon dioxide composite photocatalyst and preparation method thereof
  • Nano 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. The preparation method comprises the steps of:

[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 d...

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Abstract

The invention provides a method for preparing a nanometer titanium dioxide-silica composite photocatalyst with a core-shell structure, which includes the following steps: (1) preparing a nanometer titanium dioxide-carbon-silica composite with a core-shell structure; (2) ) Arrange the nano-titanium dioxide-carbon-silica composite into a single-layer structure on the prepreg; (3) Etch the prepreg with the nano-titanium dioxide-carbon-silica composite through corrosive vapor to remove it Part of the silica shell in the nanometer titanium dioxide-carbon-silica composite forms an opening; (4) remove the carbon in the middle layer of the corroded nanometer titanium dioxide-carbon-silica composite through high-temperature oxidation, and finally A nanometer titanium dioxide-silica composite photocatalyst with a core-shell structure was obtained. The invention also provides a nanometer titanium dioxide-silica composite photocatalyst with a core-shell structure prepared by the above 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 Patents(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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