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A kind of preparation method and application of europium-doped calcium molybdate powder

A technology of europium calcium molybdate and powder, which is applied in the field of luminescent material preparation, can solve the problems of cumbersome dichromate detection method and poor dichromate sensitivity, and achieve the effects of easy implementation, simple operation and high sensitivity

Active Publication Date: 2021-04-13
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of europium-doped calcium molybdate powder, so as to solve the problem that the existing dichromate detection method is relatively cumbersome and the existing rare earth luminescent material is used to detect dichromate. The problem of poor sensitivity

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  • A kind of preparation method and application of europium-doped calcium molybdate powder
  • A kind of preparation method and application of europium-doped calcium molybdate powder
  • A kind of preparation method and application of europium-doped calcium molybdate powder

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Effect test

Embodiment 1

[0029] (1) CaMoO 4 :Eu 3+ Powder preparation

[0030] (1) Mix 15mL of absolute ethanol, 0.4676g Ca(NO 3 ) 2 , 67uL 0.2mol / L Eu(NO 3 ) 3 Pour the aqueous solution into a mortar, add 2g of gum arabic powder, and then grind for 5min;

[0031] (2) Add 0.353g (NH 4 ) 6 MoO 24 , grind for 30min;

[0032] (3) Put the above-mentioned mortar into an oven, bake at 100°C for 4 hours, put it in a muffle furnace after drying, and roast at 600°C for 3 hours, and then get CaMoO after cooling 4 :Eu 3+ Powder.

[0033] The obtained product was analyzed by X-ray diffraction as figure 1 shown by figure 1 It can be seen that according to JCPDS29-0351, the obtained calcium molybdate has a scheelite structure.

[0034] (2) Detection of different anions

[0035] 0.0070g CaMoO 4 :Eu 3+ The powder was dissolved in 50ml water to prepare CaMoO 4 :Eu 3+ solution, prepare several groups of centrifuge tubes, pipette 1500 μL CaMoO 4 :Eu 3+ solution in individual centrifuge tubes. Prepa...

Embodiment 2

[0062] (1) CaMoO 4 :Eu 3+ Powder preparation

[0063] (1) Mix 15mL of absolute ethanol, 0.4676g Ca(NO 3 ) 2 , 67uL 0.2mol / L Eu(NO 3 ) 3 Pour the aqueous solution into a mortar, add 2g of gum arabic powder, and then grind for 5min;

[0064] (2) Add 0.353g (NH 4 ) 6 MoO 24 , grind for 30min;

[0065] (3) Put the above-mentioned mortar into an oven, bake at 100°C for 4 hours, put it in a muffle furnace after drying, and roast at 600°C for 3 hours, and then get CaMoO after cooling 4 :Eu 3+ Powder.

[0066] The obtained product was analyzed by X-ray diffraction as figure 1 shown by figure 1 It can be seen that according to JCPDS29-0351, the obtained calcium molybdate has a scheelite structure.

[0067] (2) Drawing of standard curve

[0068] (1) Add 0.0070g CaMoO 4 :Eu 3+ The powder is dissolved in 50ml of water, and a series of concentration gradients of potassium dichromate and the above-mentioned CaMoO 4 :Eu 3+ Standard solution mixed with solution, the final c...

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Abstract

The invention provides a preparation method and application of europium-doped calcium molybdate powder, the preparation method comprising the following steps: a, according to the chemical formula CaMoO 4 :Eu 3+ The stoichiometric ratio of Ca(NO 3 ) 2 Powder, Eu(NO 3 ) 3 aqueous solution and (NH 4 ) 6 Mo 7 o 24 Powder as raw material; b, Ca(NO 3 ) 2 powder and Eu(NO 3 ) 3 Put the aqueous solution in a mortar, add absolute ethanol and gum arabic powder, then grind to make the raw materials mix uniformly; c, add (NH 4 ) 6 Mo 7 o 24 Powder, continue to grind for 30~50min; d. Dry the mixture obtained in step c in an oven, then put it in a muffle furnace and roast at 600~620°C for 3~4h, and after cooling, you can get europium molybdenum doped Calcium acid powder. The invention also provides the application of the powder prepared by the above method in the quantitative detection of dichromate. The europium-doped calcium molybdate prepared by the invention has good selectivity to dichromate ion, simple and convenient detection process and high sensitivity.

Description

technical field [0001] The invention relates to the technical field of preparation of luminescent materials, in particular to a preparation method and application of europium-doped calcium molybdate powder. Background technique [0002] Dichromate is a toxic and carcinogenic strong oxidant, which is classified as the first class carcinogen by the International Agency for Research on Cancer, and is widely used in laboratories and industries. The hexavalent chromium element in dichromate is highly toxic. Long-term inhalation can damage the nasal mucosa, cause rhinitis and nasal septal cartilage perforation, damage the respiratory system, and even cause lung sclerosis. The general toxic effect is manifested Injuries to liver, kidney, gastrointestinal tract, and cardiovascular system. Chromium that enters the human body is accumulated in human tissues, and the rate of metabolism and removal is slow. Therefore, the analysis and detection of dichromate is particularly important....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/68G01N21/64
Inventor 王利勇韩媛媛郭家辉姜雪王雪宋庆炜王楠郭小庆
Owner HEBEI UNIVERSITY
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