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

A malachite green, rapid degradation technology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve catalyst recovery troubles, complex synthesis steps, Environmental secondary pollution and other problems, to achieve the effect of short decolorization time, high reuse rate, simple preparation process

Active Publication Date: 2019-12-24
ZHAOQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 pollu

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0029] A kind of Ag that rapidly degrades malachite green 2 MoO 4 / Ag 2 O material preparation method, comprises the following steps:

[0030] Preparation of Ag by hydrothermal method 2 MoO 4 / Ag 2 O complex, the specific operation is: in 20.0mL1.2M Na 2 MoO 4 2H 2 Add 0.1M Na to the beaker of O 2 HPO 4 12H 2 O 20mL, keep stirring for 5min, add 2.2mL HNO 3 , add 0.6M AgNO dropwise 3 10mL, continue to stir for 15min, slowly add 4M NaOH to pH = 7, let it stand for 15min, discard most of the supernatant, transfer about 20mL suspension to a 25mL autoclave lined with polytetrafluoroethylene, 120 React in a constant temperature box at ℃ for 14 hours, filter with suction, wash with pure water three times, transfer to a crucible, and dry in a constant temperature box at 80 °C for 12 hours for later use.

[0031] Depend on figure 1 It can be seen that the Ag obtained by the above preparation method 2 MoO 4 / Ag 2 XRD characterization results of O materials.

[0032] D...

Embodiment 2

[0034] The silver-based Fenton heterogeneous catalyst prepared in Example 1 is applied to degrade MG in waste water, and the results are as follows image 3 , Figure 4 shown.

experiment example

[0043] In the traditional Fenton reaction, iron ions are not easy to recycle, resulting in secondary pollution. In this study, Ag 2 MoO 4 / Ag 2 The heterogeneous phase of O was recovered and the reuse rate determined. Depend on Figure 5 It can be seen that Ag 2 MoO 4 / Ag 2 The O catalyst binds H after performing 5 recycles 2 o 2 Degraded MG, the decolorization rate was 87.9% at 5min, 91.8% at 20min, and 93.6% at 40min, indicating that Ag 2 MoO 4 / Ag 2 O has good recycling performance and has a good application prospect.

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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...

Claims

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Application Information

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IPC IPC(8): B01J23/68C02F1/72C02F101/30C02F101/36C02F101/38
CPCB01J23/68B01J23/002C02F1/725C02F1/722C02F2101/308C02F2101/38C02F2101/36C02F2305/026
Inventor 韦寿莲张俊权黄象金谢春生
Owner ZHAOQING UNIV
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