Transition metal oxide composite CNB photocatalyst and preparation method thereof

Abstract

The invention provides a transition metal oxide composite CNB photocatalyst. The photocatalyst is formed by compositing CNB and a transition metal oxide with carbon, has good photocatalytic degradation effect on organic dyes, especially azo dyes or anthraquinone dyes, under ultraviolet light, and has the degradation rate on methyl orange reaching more than or equal to 75% especially after being radiated in the ultraviolet light for 1 h. The invention also provides a preparation method for the photocatalyst; the method comprises the steps of preparing CNB by doping a boron element in graphite-phase carbon nitride and then composting the CNB with the transition metal oxide, to prepare the composite photocatalyst; the method is simple and feasible to implement; the yield of preparation of the photocatalyst is high.

Description

technical field

[0001] The invention relates to a novel composite photocatalyst for treating dye wastewater pollution and a preparation method thereof, in particular to a transition metal oxide composite CNB photocatalyst and a preparation method thereof. Background technique

[0002] Graphite phase carbon nitride (abbreviated as g-C 3 N 4 ) is a new type of photocatalytic material due to its high photocatalytic activity, good stability, and cheap raw material prices. However, single-phase catalysts usually have unsatisfactory photocatalytic performance due to low quantum efficiency. g-C 3 N 4 The high photogenerated electron-hole recombination rate of the material leads to its low catalytic efficiency, which limits its application in photocatalysis.

[0003] To improve g-C 3 N 4 In recent years, many modification methods have been studied. Currently, non-metal elements are usually used for g-C 3 N 4 For modification, the non-metallic elements used for modification ...

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