Preparation and application of rare earth fluorescent material for detecting heavy metal Cu<2+>
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A rare earth fluorescent material and heavy metal technology, applied in the field of preparation of rare earth fluorescent materials, can solve the problems of inaccurate detection results, low sensitivity, slow response time, etc., and achieve the effect of accurate detection
Active Publication Date: 2021-09-28
SICHUAN NORMAL UNIVERSITY
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However, most of the materials reported in the literature have disadvantages such as slow response time, low sensitivity, and poor anti-interference. At the same time, the fluorescence intensity of the material is easily affected by other factors, which may easily cause inaccurate detection results and make it difficult to accurately detect heavy metals. presence of copper ions
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Embodiment 1
[0027] refer to figure 1 , a heavy metal Cu 2+ Preparation and application of rare earth fluorescent materials for ion detection, the steps are as follows:
[0028] S1, select raw materials, terbium nitrate hexahydrate and mucus acid;
[0029] S2, mucus acid is dissolved in distilled water, stirring;
[0030] S3, adding potassium hydroxide solution to the solution obtained in S2, stirring;
[0031] S4, adding terbium nitrate hexahydrate solution to the solution obtained in S3, stirring;
[0032] S5, stop stirring, let it stand for aging, centrifuge to collect the white precipitate, dry after washing to obtain a white sample of the rare earth fluorescent material;
[0033] S6, for the obtained rare earth fluorescent material for heavy metal Cu 2+ detection.
[0034] Further, the step S2 is stirring at room temperature for 10 minutes, and the steps S3 and S4 are both stirring at room temperature for 30 minutes;
[0035] Further, the standing time in step S5 is 24 hours, t...
Embodiment 2
[0046] The rare earth fluorescent material of the present invention is used as a fluorescent probe to detect heavy metal Cu 2+ ion.
[0047] Optional:
[0048] Figure 4 It shows that the rare earth fluorescent material is immersed in 1×10 at 298 K -2 The emission spectra of M different metal ions, the inset is a histogram of the emission intensity of the samples monitored at 545 nm. The excellent luminescent properties of rare-earth fluorescent materials make it suitable for common metal ions Sr 2+ 、Ba 2+ , Mg 2+ , Mn 2+ 、Na + , Ca 2+ 、K + , Zn 2+ 、Cr 3+ 、Ni 2+ 、Co 2+ 、Cu 2+ It has potential application value in detection. Figure 4 For rare earth fluorescent materials at 298 K, 1×10 -2 Emission spectra of M after immersion in various metal ions. The results showed that Sr 2+ 、Ba 2+ , Mg 2+ , Mn 2+ 、Na + , Ca 2+ 、K + , Zn 2+ 、Cr 3+ 、Ni 2+ 、Co 2+ The effect of metal ions on the photoluminescence intensity of rare earth fluorescent materials is not...
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Abstract
The invention relates to preparation and application of a rare earth fluorescent material capable of being used for Cu<2+> ion detection. The preparation method comprises the following steps: S1, selecting raw materials including terbium nitrate hexahydrate and mucic acid; S2, dissolving the mucic acid in distilled water, and conducting stirring; S3, adding a potassium hydroxide solution into the solution obtained in the S2, and conducting stirring; S4, adding a terbium nitrate hexahydrate solution into the solution obtained in S3, and conducting stirring; S5, stopping stirring, carrying out standing and aging, conducting centrifugation to collect a white precipitate, washing the white precipitate and drying the white precipitate to obtain a white sample of a rare earth metal organic framework fluorescent material (a rare earth fluorescent material for short); and S6, applying the obtained rare earth fluorescent material to detection of heavy metal Cu<2+> ions. The rare earth fluorescent material is a rare earth metal organic framework fluorescent material prepared by a simple method, and the material can be used for quantitatively detecting the existence of heavy metal Cu<2+> ions in a water body.
Description
technical field [0001] The invention relates to the technical field of preparation of rare earth fluorescent materials, specifically for Cu 2+ Preparation and application of rare earth metal organic framework fluorescent materials for ion detection. Background technique [0002] Copper ions (Cu 2+ ) As one of the essential trace elements for the human body, it participates in the synthesis of various biological enzymes as an auxiliary group. Copper deficiency can cause anemia, bone changes, coronary heart disease, etc. However, excessive copper ions will destroy the balance between cells, and also cause the loss of the body and the disorder of physiological functions, leading to a series of neurodegenerative diseases: such as Al Alzheimer's disease, Wilson's disease and Parkinson's disease; in addition, it can also cause multiple neuritis, neurasthenia syndrome, abnormal liver function, etc. The World Health Organization (WHO) and the U.S. Environmental Protection Agency ...
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