A kind of high-efficiency photo-Fenton catalyst ag3po4/cuo and preparation method thereof

Abstract

The invention discloses a high-efficiency photo-Fenton catalyst Ag3PO4 / CuO and a preparation method thereof. The Ag3PO4 / CuO composite photo-Fenton catalyst is characterized in that it is composed of Ag3PO4 with a polyhedral structure and CuO nano spherical particles supported on its surface. Preparation method: (1) Preparation of CuO: use Cu(Ac)2 as precursor, prepare CuO by hydrothermal reaction in the presence of PVP additive; (2) Preparation of Ag3PO4 / CuO: at room temperature, obtained in step (1) Add AgNO3 aqueous solution to CuO and stir, then add excess Na3PO4 buffer solution with pH 7 composed of Na2HPO4 and NaH2PO4 dropwise, stir and react, and generate CuO in situ on Ag3PO4 to obtain Ag3PO4 / CuO composite material. The catalyst can not only improve the Fenton catalytic performance of pure CuO, but also solve the defects of the single photocatalyst Ag3PO4 with poor stability and cycle performance. No pollution and other advantages. It can be used in the fields of oxidative degradation of organic pollutants, water splitting and hydrogen production.

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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