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Novel application of manganese nodule and preparation method of layered intercalated titanium dioxide composite material

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc. reduce the problem, achieve the effect of changing the characteristics of the exposed crystal plane, improving the adsorption and degradation ability, and improving the performance

Inactive Publication Date: 2018-11-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of nano-TiO2 technology is complex and expensive; in addition, the agglomeration effect of nanoparticles will lead to its performance degradation
Some people have used natural minerals to carry titanium dioxide, but only the surface of natural minerals is used as the carrier of nano-titanium dioxide. Although the cost can be reduced to a certain extent, it has little effect on its photocatalytic performance.

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  • Novel application of manganese nodule and preparation method of layered intercalated titanium dioxide composite material
  • Novel application of manganese nodule and preparation method of layered intercalated titanium dioxide composite material
  • Novel application of manganese nodule and preparation method of layered intercalated titanium dioxide composite material

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preparation example Construction

[0031] The preparation method of described layered intercalation titanium dioxide composite material, the steps are as follows:

[0032] The first step is to pre-treat the oceanic manganese nodules. The massive manganese nodules are crushed, and the powdered manganese nodules obtained by grinding are easier to carry out the next reaction;

[0033] The second step is to extract layered minerals from the raw manganese nodules. A strong oxidant for preparing layered minerals is used to corrode and oxidize impurity minerals in manganese nodules under high-temperature calcination, and provide potassium ions to exchange sodium ions in manganese nodules; after persulfate reaction, oxides or A large number of hydroxides are dissolved to produce relatively pure layered minerals;

[0034] The third step is to prepare the layered mineral intercalated with the titania precursor. After modification by organic modifiers, the interlayer of layered minerals changes from hydrophilic to lipo...

Embodiment 1

[0038] 1) Soak the raw oceanic manganese nodules in simulated seawater for 7 days, then crush and grind them. Sonicate for 60 min to fully disperse, and centrifuge at 15,000 rpm for 30 min to collect the lower granular precipitate and dry at 150 °C for 48 h;

[0039] 2) Mix the treated manganese nodules with a certain amount of potassium permanganate at a mass ratio of 10:1, add a small amount of oleic acid to grind them evenly, and calcinate the mixture at 1500 °C for 12 h. Put the calcined product into an Erlenmeyer flask filled with 2 mol / L ammonium persulfate solution, and stir for 120 min. After the reaction, filter and wash, and keep the filter residue at 150 °C for 24 h to obtain layered minerals;

[0040] 3) After ultrasonically dispersing the layered minerals, add the layered minerals into cetyltrimethylammonium bromide with 2 times the ion exchange capacity, stir and react at a constant temperature in a water bath at 90 °C for 12 h, and continue to age in a water ba...

Embodiment 2

[0047] 1) Soak the raw oceanic manganese nodules in simulated seawater for 1 day, then crush and grind them. Sonicate for 1 min to fully disperse, and centrifuge at 500 rpm for 1 min to collect the lower granular precipitate and dry at 25°C for 2 h;

[0048] 2) Mix the treated manganese nodules with a certain amount of potassium nitrate at a mass ratio of 0.1:1, add a small amount of stearic acid to grind them to make them evenly mixed, and calcinate the mixture at 500 °C for 1 h. Put the calcined product into an Erlenmeyer flask filled with 0.1mol / L potassium persulfate solution, and stir for 10 min. After the reaction, filter and wash, and keep the filter residue at 60 °C for 0.5 h to obtain layered minerals.

[0049] 3) After ultrasonically dispersing the layered minerals, add the layered minerals into cetylpyridinium chloride with 0.5 times the ion exchange capacity, stir and react at a constant temperature in a water bath at 40 °C for 0.5 h, continue to age in a water ba...

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Abstract

The invention discloses novel application of manganese nodule and a preparation method of a layered intercalated titanium dioxide composite material. The preparation method of the layered intercalatedtitanium dioxide composite material comprises the following steps: firstly taking ocean manganese nodule raw ores as materials, treating by using reagents such as strong oxidant and persulfate to synthesize a manganese nodule layered mineral; then carrying out organic modification on the synthesized layered mineral to prepare a modified layered mineral; uniformly mixing a titanium dioxide precursor with an alcohol material to prepare slurry, mixing the modified layered mineral with the slurry, introducing the titanium dioxide precursor between layers of the layered mineral, carrying out hydrolysis and calcination to prepare the layered intercalated titanium dioxide composite material. Through the preparation method of the layered intercalated titanium dioxide composite material, nano titanium dioxide is intercalated in the layers of the manganese nodule mineral; through adoption of the interlayer domain-limiting effect of the manganese nodule layered mineral, the particle size of titanium dioxide is reduced; the agglomeration of nanoparticles is inhibited; the exposed crystal face feature of the intercalated titanium dioxide is changed; compared with nano titanium dioxide, the cost of the layered intercalated titanium dioxide composite material is low and has higher adsorption performance and photocatalytic performance.

Description

technical field [0001] The invention relates to a preparation method of a compound, in particular to a new application of a manganese nodule and a preparation method of a layered intercalation titanium dioxide composite material. Background technique [0002] Oceanic manganese nodules are a rich seabed mineral resource with large reserves and wide distribution, which have important strategic significance. In recent years, with the development of new technologies such as electron microscopy, powder X-ray diffraction, and neutron diffraction, the non-traditional utilization values ​​of manganese nodules, such as good adsorption capacity, high catalytic performance and excellent photoelectric properties, have gradually emerged. The layered minerals extracted from oceanic manganese nodules retain the pore structure of manganese nodules and have good catalytic and adsorption properties. At the same time, layered minerals such as birnessite itself have good photocatalytic propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889
CPCB01J23/8892B01J35/393B01J35/396B01J35/39
Inventor 陈雪刚付丁陈灵乐赵方舟秦文莉艾曼青
Owner ZHEJIANG UNIV
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