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Zinc complex single crystal and preparation method thereof, and application of zinc complex single crystal in adsorption of lead ions in water

A zinc complex and single crystal technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of high residual concentration, low absorption capacity, poor lead ion removal performance, etc., to achieve technological Simple, high-yield results

Inactive Publication Date: 2020-07-03
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these adsorbents lack effective adsorption sites, such as activated carbon, zeolites, and clays, etc., and their removal performance for lead ions is poor (low absorption capacity, high residual concentration), due to their simple composition and difficult functionalization.

Method used

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  • Zinc complex single crystal and preparation method thereof, and application of zinc complex single crystal in adsorption of lead ions in water
  • Zinc complex single crystal and preparation method thereof, and application of zinc complex single crystal in adsorption of lead ions in water
  • Zinc complex single crystal and preparation method thereof, and application of zinc complex single crystal in adsorption of lead ions in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Zinc nitrate hexahydrate (0.1488 g, 0.5 mmol), 4,4'-azodibenzoic acid (0.1431 g, 0.5 mmol) and 25,26,27,28-tetrakis(3-pyridinemethoxy) [4] Aromatic hydrocarbons (0.1972 g, 0.25 mmol) were dissolved in N,N'-dimethylformamide (50 mL), put into heat-resistant glass bottles in batches and sealed, under hydrothermal conditions, 130 ℃ for one day, the natural condition dropped to room temperature, and the orange block crystal product was obtained with a yield of 51%. The molecular formula of the orange block crystal was: {[(Zn(ADB)L 0.5 ]·1.5DMF} n , n is a positive integer, that is, a zinc complex single crystal.

Embodiment 2

[0038] Zinc nitrate hexahydrate (0.1488 g, 0.5 mmol), 4,4'-azodibenzoic acid (0.1431 g, 0.5 mmol) and 25,26,27,28-tetrakis(3-pyridinemethoxy) [4] Aromatic hydrocarbons (0.1972 g, 0.25 mmol) were dissolved in N,N'-dimethylformamide (50 mL), put into heat-resistant glass bottles in batches and sealed, under hydrothermal conditions, 120 ℃ for one day, the natural condition dropped to room temperature, and the orange blocky crystal product was obtained with a yield of 35%. The molecular formula of the orange blocky crystal was: {[(Zn(ADB)L 0.5 ]·1.5DMF} n , n is a positive integer, that is, a zinc complex single crystal.

Embodiment 3

[0040] Zinc nitrate hexahydrate (0.1488 g, 0.5 mmol), 4,4'-azodibenzoic acid (0.1431 g, 0.5 mmol) and 25,26,27,28-tetrakis(3-pyridinemethoxy) [4] Aromatic hydrocarbons (0.1972 g, 0.25 mmol) were dissolved in N,N'-dimethylformamide (50 mL), put into heat-resistant glass bottles in batches and sealed, under hydrothermal conditions, 140 ℃ for one day, the natural condition dropped to room temperature, and the orange blocky crystal product was obtained with a yield of 40%. The molecular formula of the orange blocky crystal was: {[(Zn(ADB)L 0.5 ]·1.5DMF} n , n is a positive integer, that is, a zinc complex single crystal.

[0041] After immersing the zinc complex single crystals in Example 1 in aqueous solutions with different pH values ​​for 24 hours, their powder diffractions were tested respectively. Diffraction experiments show that the powder diffraction data at different Ph=3-11 are basically consistent with the original data of the zinc complex single crystal, such as im...

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Abstract

The invention discloses a zinc complex single crystal and a preparation method thereof, and an application of the zinc complex single crystal in adsorption of lead ions in water. The zinc complex single crystal has a chemical formula of {[(Zn(ADB)L<0.5>] <1.5>DMF}<n>, wherein n is a positive integer. The single crystal is prepared according to the following method: adding zinc nitrate hexahydrate,4,4'-azodibenzoic acid oxide and 25,26,27,28-tetra(3-pyridylmethoxy)calix[4]arene according to a molar ratio of (1-3): (1-3): 1 into an excessive solvent, namely N,N'-dimethylformamide, then sealingan obtained mixture into a high-temperature-resistant glass bottle, carrying out a constant-temperature reaction at 120-140 DEG C under hydrothermal conditions for 20-30 hours until the reaction is finished, and slowly carrying out cooling to a room temperature at a rate of 5 DEG C / h so as to obtain a target product. The zinc complex single crystal provided by the invention can be used as an adsorbent.

Description

technical field [0001] The invention relates to a single crystal material, in particular to a zinc complex single crystal and its preparation method and application. Background technique [0002] Lead ion (Pb 2+ ) is a ubiquitous bioaccumulative heavy metal ion with a long biological half-life, which can accumulate in the human body for a long time and cause serious damage to the reproductive system, nervous system, kidney, liver and brain. Has been recognized as one of the most toxic metal ions. With the rapid development of industrialization and urbanization, lead ion emission has become a serious environmental problem. Therefore, almost all countries are making great efforts to remove lead ions from drinking water to avoid excessive intake of lead ions by humans, thereby reducing the concentration of lead ions in blood. Therefore, the removal of lead ions from water is of critical importance in protecting public health and the environment. In recent years, various ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/226C02F1/285C02F2101/20C08G83/008
Inventor 刘雷雷余彩霞王柯忠李雪菁
Owner YANTAI UNIV