Double-Z type Bi2O2CO3 / g-C3N4 / SrTiO3 heterojunction photocatalyst as well as preparation method and application thereof

Abstract

The invention relates to a double-Z type Bi2O2CO3 / g-C3N4 / SrTiO3 heterojunction photocatalyst as well as a preparation method and application of the double-Z type Bi2O2CO3 / g-C3N4 / SrTiO3 heterojunction photocatalyst. The preparation method comprises the following steps: S1, preparing g-C3N4; s2, preparing Bi2O2CO3 (bismuth oxide 2CO3); s3, preparing SrTiO3 (strontium titanate); and S4, dispersing the g-C3N4 prepared in the step S1, the Bi2O2CO3 prepared in the step S2 and the SrTiO3 prepared in the step S3 into absolute ethyl alcohol, carrying out ultrasonic treatment, and drying, so as to obtain the double-Z type Bi2O2CO3 / g-C3N4 / SrTiO3 heterojunction photocatalyst. Compared with the prior art, the catalyst is synthesized through a simple method, and CO2 is subjected to photocatalytic reduction to obtain CO and CH4. And effective transfer and separation of charges in a plurality of channels are realized by utilizing a double-Z type charge transfer mechanism.

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