Compound mesoporous photocatalyst and preparation method thereof

Abstract

The invention discloses a mesoporous silicon dioxide compound photocatalyst. In the mesoporous silicon dioxide compound photocatalyst, silicon dioxide is used as a carrier, a photosensitive silane coupling agent is doped in a framework in the carrier, and titanium dioxide is loaded in nano hole channels of the carrier. The invention also provides a preparation method of the mesoporous silicon dioxide compound photocatalyst. The preparation method comprises the steps: firstly preparing the photosensitive silane coupling agent by using a high-temperature pyrolysis method, preparing a photosensitive silane coupling agent doped mesoporous silica material by using an in-situ loading method, performing a hydrothermal method on titanium oxide, and introducing titanium oxide after subjected to the hydrothermal method into photosensitive silane coupling agent doped silicon oxide hole channels in the framework by adopting a loading manner to finally obtain the mesoporous silicon oxide compound photocatalyst. The photosensitive silane coupling agent on the surface of the photocatalyst has the relatively good complexing capacity on metal ions, the high dispersion and the small grain size loading of a semiconductor-titanium dioxide on the photosensitive silane coupling agent-mesoporous silicon oxide compound material is realized, and therefore, the material has the very good circulation pollutant disposal capacity of pollutant enrichment firstly and pollutant degradation.

Description

technical field [0001] The invention belongs to the technical field of advanced nanomaterials and catalysts, and specifically relates to the preparation of a photosensitive silane coupling agent and titanium oxide-modified mesoporous silica composite photocatalyst with both enrichment and degradation functions and the photocatalytic degradation of organic pollutants application. Background technique [0002] Due to its high specific surface area and unique pore structure, mesoporous silica materials have good applications in the fields of molecular sieves, catalysts, adsorption materials, and sensor devices. However, mesoporous silica materials composed of Si and O atoms do not have any oxidation ability and absorption ability to ultraviolet or visible light, which greatly limits their application development in the field of catalysis, especially in the field of photocatalysis. In order to make it better used in photocatalytic research, the most common method is to try to h...

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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a composite mesoporous photocatalyst and its preparation method, which solves the problems of the prior art. The skeleton of the mesoporous material in the hole photocatalyst may collapse and deform, which will affect the technical problem of the catalytic effect

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