Efficient light fenton catalyst Ag3PO4/CuO and preparation method thereof

Abstract

The invention discloses an efficient light fenton catalyst Ag3PO4 / CuO and a preparation method thereof. The Ag3PO4 / CuO compound light fenton catalyst is characterized by being prepared from Ag3PO4 with a polyhedron structure and CuO nano spherical particles loaded on the surface of Ag3PO4. The preparation method comprises the steps of CuO preparation, wherein Cu(Ac)2 is adopted as a precursor, and a hydrothermal reaction is carried out to prepare CuO under the existence of PVP additives; 2, Ag3PO4 / CuO preparation, wherein an AgNO3 water solution is added to CuO obtained in the step 1 for stirring at room temperature, then excessive Na3PO4 buffer solutions prepared from Na2HPO4 and NaH2PO4 are added dropwise, reacting is carried out along with stirring, CuO is generated in situ on Ag3PO4, and an Ag3PO4 / CuO composite is obtained. The catalyst can improve the fenton catalytic performance of pure CuO, the defect that a single light catalyst Ag3PO4 is poor in stability and circulation performance is overcome, and when the catalyst is used for organic pollutant degradation, the advantages of being high in catalytic performance, stable in structure, high in circulating performance, free of pollution of degradation products and the like are achieved. The efficient light fenton catalyst Ag3PO4 / CuO can be used for the fields of organic pollutant oxidative degradation, water decomposition hydrogen manufacturing and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a high-efficiency photo-Fenton catalyst Ag 3 PO 4 / CuO and its preparation method. Background technique [0002] In the 21st century, mankind is facing a series of crises: population expansion and excessive consumption of resources, air and water pollution, toxic waste emissions, global warming caused by greenhouse gases, and the disappearance of a large number of biological species. The global environment has already faced the ocean. , freshwater, wetlands, biodiversity and energy. The concept of sustainable development reveals that population, resources and the environment are closely related, and the comprehensive utilization of resources and environmental protection are interrelated to form an organic whole. Environmental protection is an important content in the process of resource development and economic development. In order to achieve sustainable eco...

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Problems solved by technology

[0003] Since 2010, Ye Jinhua's research group discovered a new visible light catalyst Ag with high quantum yield, good visible light catalytic performance, and no secondary pollution. 3 PO 4 , the study found that this indirect semiconductor is much higher than the semiconductor catalytic performance reported by the predecessors, and can quickly and completely degrade organic pollutants, but it is partially dissolved in water, has a low specific surface area, and is expensive. Not only is the light unstable, but the electron- Holes are easy to recombine, which greatly limits their own photocatalytic performance. Therefore, researchers have focused on these problems and introduced new semiconductors through various methods to successfully synthesize various Ag. 3 PO 4 Composite materials such as Ag 3 PO 4 / AgI, Ag 3 PO 4 / Ag 2 S, Ag 3 PO 4 / In(OH) 3 、Ag 3 PO 4 / GO, Ag 3 PO 4 / g -C 3 N 4 、Ag 3 PO 4 / MoS 2 、Ag 3 PO 4 / WS 2 , etc., as many as dozens of kinds, although this has greatly improved the pure Ag 3 PO 4 various weaknesses, but these ideas are relatively single and difficult to expand

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