Carbon nitride photocatalytic material doped with heterogeneous elements and its preparation method and application

Abstract

The invention discloses a heterogeneous element doping carbon nitride photocatalytic material, as well as a preparation method and application thereof. The preparation method of the heterogeneous element doping carbon nitride photocatalytic material comprises the steps of (1) reacting a graphite-phase carbon nitride precursor with a plant extract in a solution so as to obtain a hydrogel material,wherein the plant extract is a mixture obtained through extraction by adopting plants as raw materials and containing a phosphorous compound and inositol; and freeze-drying the hydrogel material so asto obtain an aerogel material; and (2) under the inert gas shielding, roasting the aerogel material through temperature programming, and obtaining the heterogeneous element doping carbon nitride photocatalytic material. According to the heterogeneous element doping carbon nitride photocatalytic material, as well as the preparation method and the application thereof provided by the invention, by utilizing static electricity and hydrogen-bond interaction between the plant extract and the graphite-phase carbon nitride precursor, materials are orderly arranged and assembled, so that a photocatalytic performance is improved; and in addition, an applied phosphorus source has no any toxic or side effects, so that the product purity is high, the process flow is simple, the hydrogen production speed is high, and the heterogeneous element doping carbon nitride photocatalytic material is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon nitride photocatalytic material doped with heterogeneous elements and a preparation method and application thereof. Background technique [0002] In the graphitic phase carbon nitride (g-C 3 N 4 ) catalysts, g-C with a stable layered structure similar to graphene 3 N 4 Widely used in the field of heterogeneous catalysis, its band gap and semiconductor band edge position can meet the thermodynamic requirements of photocatalytic conversion. Compared with other photocatalysts, its advantages are very prominent: good thermal and chemical stability, The source is abundant and the preparation process is simple. g-C 3 N 4 The structure determines that it has a wide range of applications. Currently, g-C 3 N 4 Mainly used in photo-splitting water to produce hydrogen and photocatalytic reduction of CO 2 , photocatalytic pollutant degradation and sterilization, etc., but it faces...

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Problems solved by technology

[0005] Again for example CN107008496A discloses a kind of preparation method of lipophilic modified graphite phase carbon nitride, after graphite phase carbon nitride is mixed with organic modifier, add ultrasonic in glacial acetic acid, then transfer to hydrothermal kettle for water heating Thermal reaction, finally the sample is washed to neutral, and dried to obtain modified graphite phase carbon nitride. This method is simple to prepare, but only organically modifies the material to improve the solubility of carbon nitride materials in organic solvents.

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