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Preparation method of CaTiO3/CaO/TiO2 composite material and application of CaTiO3/CaO/TiO2 composite material

A technology of composite materials and mixed solutions, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc. Pollution and other issues, to achieve the effect of saving production costs and good photocatalytic activity

Pending Publication Date: 2020-10-09
浙江工业大学温州科学技术研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the required raw material cost of these methods is relatively high, and the calcium source that adopts is the compound of calcium, as calcium chloride dihydrate, calcium nitrate nonahydrate, calcium chloride pentahydrate etc., and alkaline conditioner is strong alkali NaOH solution or KOH solution, etc., are likely to cause environmental pollution and are not conducive to environmental protection

Method used

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  • Preparation method of CaTiO3/CaO/TiO2 composite material and application of CaTiO3/CaO/TiO2 composite material
  • Preparation method of CaTiO3/CaO/TiO2 composite material and application of CaTiO3/CaO/TiO2 composite material
  • Preparation method of CaTiO3/CaO/TiO2 composite material and application of CaTiO3/CaO/TiO2 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one, a kind of CaTiO 3 / CaO / TiO 2 The preparation method of composite material is prepared according to the following steps:

[0024] (1) At room temperature, take a certain mass ratio of TiOSO 4 and CaCO 3 Ultrasonic stirring is dissolved in the solvent to form two solutions, and then the two solutions are mixed and stirred to obtain a uniform mixed solution;

[0025] (2) Weigh a certain mass of CO(NH 2 ) 2 Dissolved in deionized water to obtain a pH regulator;

[0026] (3) After stirring the mixed solution prepared in step (1) in a magnetic stirrer, add the pH regulator prepared in step (2) dropwise to the mixed solution to obtain a uniform mixed solution;

[0027] (4) Transfer the mixed solution prepared in step (3) to the reaction kettle for hydrothermal reaction, then filter, wash and dry to obtain a white powder;

[0028] (5) After calcining the white powder prepared in step (4) in a muffle furnace, take it out and grind it evenly to obtain CaTiO...

Embodiment 2

[0037] Embodiment two, a kind of CaTiO 3 / CaO / TiO 2 Preparation method of composite material:

[0038] (1) At room temperature, weigh 0.85g of TiOSO 4 and 0.4 g of CaCO 3 Place them in 20mL and 10mL of deionized water respectively and ultrasonically stir for 30min, wherein the ultrasonic power is 180W, then mix and stir the two solutions evenly to obtain a mixed solution;

[0039] (2) Weigh 1g of CO(NH 2 ) 2 Dissolve in 20mL deionized water, stir evenly, and then stand still to obtain a pH regulator;

[0040] (3) Put the mixed solution prepared in step (1) in a magnetic stirrer, stir at a constant temperature at 85°C at a medium speed, add the pH regulator prepared in step (2) dropwise to the mixed solution, and adjust the pH value of the solution to 6.5, Stir for 10 min to obtain a uniform mixed solution;

[0041] (4) Transfer the mixed solution prepared in step (3) to a reaction kettle for hydrothermal reaction at 100°C for 10 hours, and then transfer the reaction sol...

Embodiment 3

[0046] Embodiment three: a kind of CaTiO 3 / CaO / TiO 2 Preparation method of composite material:

[0047] (1) At room temperature, weigh 1g of TiOSO 4 and 0.5 g of CaCO 3 Place them in 25mL and 15mL of deionized water and ultrasonically stir for 50min, where the ultrasonic power is 60W, and then mix and stir the two solutions evenly to prepare a mixed solution;

[0048] (2) Weigh 1g of CO(NH 2 ) 2 Dissolve in 15mL deionized water, stir evenly, and then stand still to obtain a pH regulator;

[0049] (3) Put the mixed solution prepared in step (1) in a magnetic stirrer at a constant temperature of 90°C and stir at a medium speed, add the pH regulator prepared in step (2) dropwise to the mixed solution, adjust the pH value of the solution to 5.0, and stir 15min to obtain a uniform mixed solution;

[0050] (4) Transfer the mixed solution prepared in step (3) to a reaction kettle for hydrothermal reaction at 120°C for 8 hours, and then transfer the reaction solution to an ove...

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Abstract

The invention provides a preparation method of a CaTiO3 / CaO / TiO2 composite material. The method comprises the following steps of: respectively dissolving TiOSO4 and CaCO3 in a solvent by ultrasonic stirring at normal temperature to form two solutions, and mixing and stirring the two solutions to obtain a uniform mixed solution; dissolving CO(NH2)2 in deionized water to obtain a pH regulator; putting the mixed solution into a magnetic stirrer for stirring, and dropwise adding a pH regulator into the mixed solution to obtain a uniform mixed solution; transferring the uniform mixed solution intoa reaction kettle for hydrothermal reaction, and then performing suction filtration, washing and drying to obtain white powder; and calcining the white powder in a muffle furnace, taking out the product, and uniformly grinding the product to obtain the composite material. The method has the advantages that: caCO3 is used as a calcium source, the production cost is saved, alkalescent CO(NH2)2 is used as a pH regulator, strong alkali pollution caused by a NaOH solution or a KOH solution as a pH regulator is avoided, CaO provides an alkaline environment beneficial to photocatalytic degradation ofthe composite material, the reaction process is green and environmentally friendly, good photocatalytic activity is achieved, the cost is saved, and the water body pollution treatment effect is improved.

Description

technical field [0001] The invention specifically relates to the field of development and preparation of semiconductor photocatalytic materials, in particular to an energy-saving, environmentally friendly, and non-strong acid and alkali preparation of CaTiO 3 / CaO / TiO 2 Composite methods. Background technique [0002] With the development of industrialization and population growth, the problem of environmental pollution has become increasingly serious, and traditional methods have been unable to efficiently solve pollution problems, especially water pollution. At present, photocatalytic degradation of organic pollutants has become a new way to solve water pollution. It has the advantages of low cost, high efficiency and no secondary pollution. [0003] From the 1970s to the present, TiO 2 It is the most widely and deeply researched photocatalyst in the field of photocatalysis. In recent years, TiO 2 Other photocatalysts have been discovered one after another, such as pe...

Claims

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Application Information

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IPC IPC(8): B01J23/02C02F1/30C02F101/30
CPCB01J23/02C02F1/30C02F2305/10C02F2101/30B01J35/39
Inventor 盛嘉伟占文卿孙青张俭
Owner 浙江工业大学温州科学技术研究院
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