Dy-containing nano lamellar structure complex photocatalyst and preparation method thereof

A nanosheet and photocatalyst technology, applied in the field of photocatalytic materials and nanomaterials, can solve the problems of high sintering temperature, difficult control of atomic ratio, long reaction time, etc.

Inactive Publication Date: 2017-04-19
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can be used to prepare this type of composite oxide, the product has more impurities (lower purity), larger particles, poor product uniformity, and the general sintering temperature is higher, and some methods require additional High pressure; the sol-gel method has strict requirements on the precursor components, and the metal alkoxide is expensive, the reaction time is long, and the preparation method is extremely complicated; the metal oxide prepared by the powder roasting method is difficult to control the atomic ratio. And higher sintering temperature

Method used

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  • Dy-containing nano lamellar structure complex photocatalyst and preparation method thereof
  • Dy-containing nano lamellar structure complex photocatalyst and preparation method thereof
  • Dy-containing nano lamellar structure complex photocatalyst and preparation method thereof

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Effect test

Embodiment 1

[0032] A novel method for synthesizing single crystals of complexes containing Dy nanosheet structures, specifically: adding 1mmol CuCl to a beaker 2 , 1 mmol DyCl 3 , add 10ml of deionized water. After mixing evenly, solution A was obtained; 2 mmol 3,4 dipicolinic acid was dissolved in 30 ml of absolute ethanol, and 30 ml of triethylamine was added to adjust the pH to 10 to obtain solution B; the solutions A and B were mixed and stirred, and the stirring was turned to The speed is 500r / min. After stirring for 30min, a blue solution is obtained. After filtering to remove impurities, light blue hexagonal microcrystals appear after the resulting solution is left to stand for 3h. Filter and dry naturally at room temperature to obtain Dy-containing nanosheets. Structural complex single crystal. The yield is 45%.

[0033] From the novel Dy-containing photocatalyst nanosheet structure complexes prepared in this example, randomly select a blue crystal of 0.2 mm × 0.18 mm × 0.12 mm...

Embodiment 2

[0042] A kind of synthetic method of novel nano-sheet structure oxide containing Dy, comprises the following steps: in beaker, add 4mmol Cu(NO 3 ) 2 , 4mmol Dy(NO 3 ) 3 , add 120ml of deionized water, and mix well to obtain solution A; dissolve 8mmol2,6-dipicolinic acid in 40ml of methanol, add 30ml of 1 / 500mol / L sodium hydroxide solution, adjust the pH to 10, and obtain solution B; Mix and stir the A and B solutions, the stirring speed is 800r / min, and the blue solution is obtained after mixing and stirring for 60 minutes. After filtering and removing impurities, the obtained solution is left to stand for 3 hours, and light blue hexagonal microcrystals appear after filtering, at room temperature. Naturally dried under natural conditions, a blue single crystal powder was obtained with a yield of 46%.

[0043] The single crystal powder was put into a nitrogen reduction furnace, sintered at 800°C, and kept for 3 hours to obtain Dy 2 Cu 2 o 5 polycrystalline powder.

[004...

Embodiment 3

[0047] A kind of synthetic method of novel nano-sheet structure oxide containing Dy, comprises the following steps: add 4mmol Cu (CH 3 COO) 2 , 4 mmol Dy (CH 3 COO) 3 , add 80ml of deionized water, and mix well to obtain solution A; dissolve 8mmol 3,4 dipicolinic acid in 30ml of butanol, 30ml of 1 / 500mol / L sodium hydroxide solution, adjust the pH to 11, and obtain solution B ; A and B solutions are mixed and stirred, the stirring speed is 1000r / min, after mixing and stirring for 40min, a blue solution is obtained, after filtering to remove impurities, light blue hexagonal microcrystals appear after the resulting solution is left to stand for 4h; filter, Dry naturally at room temperature to obtain a blue single crystal powder with a yield of 46%.

[0048] The single crystal powder was put into a nitrogen reduction furnace, sintered at 1000°C, and kept for 1 hour to obtain Dy 2 Cu 2 o 5 polycrystalline powder.

[0049] Dy in this embodiment 2 Cu 2 o 5 SEM images of oxi...

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Abstract

The invention belongs to the field of a nanomaterial, and particularly relates to a Dy-containing nano lamellar structure complex photocatalyst and a preparation method thereof. A chemical formula of a Dy-containing nano lamellar structure complex is [DyCu(pdc)2(OAc)2(H2O)2].11H2O; in the formula, pdc is a pyridine carboxylic acid molecule; and the complex is a monoclinic system, a P21/n point group and a complicated 3D structure, and is composed of repeated [DyCu(pdc)2(OAc)2(H2O)2].11H2O units. Cell parameters are as follows: a is equal to 1.3788(4)nm, alpha is equal to 90 degrees, b is equal to 1.1031(3)nm, beta is equal to 100.300(3) degrees, c is equal to 19.978(5)nm, gamma is equal to 90 degrees, V is equal to 2974.63nm<3>, and Z is equal to 4. In the complex, Cu<2+> ions are penta-coordinated, Dy<3+> ions are nona-coordinated, and a three-dimensional network structure is formed. The complex is of relatively uniform lamellar structure and has a photocatalysis effect.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and photocatalytic materials, and in particular relates to a nanosheet structure photocatalyst using a novel Dy-containing complex as a precursor and a preparation method thereof. Background technique [0002] The design and preparation of metal-ligand compounds have attracted more and more attention. Ligands are mainly responsible for energy absorption and energy transfer. Metal-ligand compounds have important applications in gas physical adsorption, ion exchange and photocatalysis. Due to this unique characteristic, rare earth cuprates have attracted widespread attention and become a research hotspot in the field of materials. [0003] In the prior art, there are many synthetic methods for this type of compound, mainly including the following: (1) Sol-gel method: the hydrolysis of the alkoxide or organic complex of the reactant to generate the corresponding hydroxide Or aqueous oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J31/22B01J35/02A62D3/17
CPCA62D3/17A62D2101/26A62D2101/28B01J23/10B01J31/2243B01J35/004B01J35/02B01J2531/0205B01J2531/16B01J2531/38
Inventor 刘宣文郭瑞史晓杰刘朝斌岳铭郑贵元苏娜
Owner 东北大学秦皇岛分校
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