Potassium niobate nanotube photocatalyst and preparation method and application thereof

Abstract

The invention discloses a potassium niobate nanotube photocatalyst and a preparation method and application thereof. Potassium niobate nano particle powder is dispersed in dilute acid solution to be filtered and washed to be neutral after being continuously stirred for 3-4 days to obtain acidulated potassium niobate; the acidulated potassium niobate is dispersed in deionized water; alkylamine aqueous solution is dropwise added until pH is 9-10; solution stands for grading after being stirred for 2-3 days to obtain the potassium niobate nanotube photocatalyst; metal, oxide or dyes can be further loaded; and under the condition of ultraviolet or visible light, the aqueous solution is catalyzed and reduced to prepare hydrogen and degrade organic pollutants. The preparation method of the invention has moderate condition, short period and environment protection and can obtain the potassium niobate nanotube photocatalyst with even appearance, narrow pipe diameter distribution and high catalysis efficiency.

Description

technical field The invention belongs to the field of energy technology, and in particular relates to a potassium niobate nanotube photocatalyst and a preparation method and application thereof. Background technique With the gradual depletion of fossil energy and the aggravation of environmental pollution, human beings urgently need to find new alternative energy sources. Solar energy is inexhaustible and inexhaustible. Converting solar energy into hydrogen energy can not only alleviate the energy crisis, but also fundamentally solve environmental problems. After more than 30 years of research, the heterogeneous photocatalytic technology of semiconductor photocatalytic water splitting to produce hydrogen has made rapid progress. At present, the catalyst systems used for photolysis of water to produce hydrogen mainly include oxides, sulfides, nitrides and their solid solutions, layered metal oxides and their pillared modified products, etc. A new catalyst system is present...

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Problems solved by technology

According to the results of literature and existing patents, most of the existing potassium niobate catalysts have small loading capacity, weak binding force and poor stability. The amount of methanol used in the process of reducing water is large, and there are still many problems in the use of solar energy for photocatalysis. Therefore, in solar photocatalysis research, how to prepare potassium niobate photocatalyst with high catalytic performance and realize its utilization of visible light has become one of the current research hotspots.

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