Preparation method of Ag2MoO4/Ag2O material for rapidly degrading malachite green

Abstract

The invention discloses a Fenton-like catalyst Ag2MoO4 / Ag2O material capable of rapidly degrading malachite green as well as a preparation method and application of the Fenton-like catalyst Ag2MoO4 / Ag2O material. Disodium hydrogen phosphate, sodium molybdate and silver nitrate are used as raw materials, a novel Ag2MoO4 / Ag2O Fenton-like catalyst is synthesized by utilizing a chemical precipitationmethod and cooperating with hydrothermal silver oxide self-doping, and the optimal pH of a synthesis reaction, the feeding ratio of the sodium molybdate to the silver nitrate and the conditions of thehydrothermal reaction are determined; the catalyst can be applied to efficient degradation of malachite green in a proper pH environment after being mixed with H2O2. Research finds that the decolorization rate of the Ag2MoO4 / Ag2O-H2O2 heterogeneous Fenton-like composite system on the malachite green is as high as 99.7% within 6 min. The preparation method of the photocatalyst is simple and easy to operate, has the advantages of low toxicity, low price and the like, and has very high research value in the field of organic dye degradation.

Description

technical field [0001] The invention relates to the field of catalytic degradation of organic pollutants, in particular to an Ag 2 MoO 4 / Ag 2 The preparation method and catalytic conditions of O. Background technique [0002] Since the high-energy electrons in simple silver are easy to recombine with the low-energy holes under the action of Coulomb gravity, the photocatalytic activity of simple silver is not high, and the silver-based materials that really show high photocatalytic activity are silver compounds. Including silver-containing halides, oxides, sulfides, metal oxides and oxo acid salts. Hu et al also prepared the surface plasmon photocatalyst Ag / AgI / Al by coprecipitation method and photoreduction method. 2 o 3 , the material also exhibited highly efficient photocatalytic activity and stability; Yi et al. used a simple ion exchange reaction to prepare highly degradable Ag 3 PO 4 Photocatalyst, which can completely decolorize the dye in a few minutes; Guo et...

AI Technical Summary

Problems solved by technology

It can be seen that the existing iron-based Fenton-like catalysts for degrading MG all have the disadvantages of long degradation time and complex synthesis steps. At the same time, there are also problems such as catalyst recovery troubles, which limit their further utilization and cause environmental pollution. secondary pollution

In recent years, silver salts including Ag 2 O, Ag 2 MoO 4 As a photocatalyst, it has been successfully applied to the photocatalytic degradation of pollutants such as methyl orange and Cr(VI), but it is rare to combine silver salts with H 2 o 2 Composition of Fenton-like systems for catalytic degradation of organic dyes

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