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Intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions

A technology of photonic crystals and uranyl ions, applied in chemical instruments and methods, other chemical processes, silicon compounds, etc., can solve the problems of in-situ detection and achieve good selectivity, high adsorption capacity, and high sensitivity

Active Publication Date: 2017-10-20
HUNAN UNIV
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Problems solved by technology

[0005] In view of this, the present invention aims to propose a smart photonic crystal material for simultaneous monitoring and removal of uranyl ions, in order to develop a smart material with visual indication signals and real-time monitoring of the adsorption process, which solves the problem of traditional adsorption Material cannot detect UO in solution in situ 2 2+ Disadvantages of concentration and real-time display of adsorption degree of adsorbent

Method used

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  • Intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions
  • Intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions
  • Intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions

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Embodiment 1

[0044] An intelligent photonic crystal material for simultaneous monitoring and removal of uranyl ions. The preparation of the intelligent photonic crystal material includes the following steps:

[0045] (1) Monodisperse SiO 2 Synthesis and purification of nanoparticles

[0046] Monodisperse SiO 2 The nanoparticle synthesis steps are as follows:

[0047] a. SiO 2 Seed Synthesis

[0048] Add 80ml of absolute ethanol to a 250ml three-necked bottle, then add 15ml of ammonia water with a concentration of 3%, stir and mix evenly at a speed of 300rpm, and then add 4ml of tetraethyl orthosilicate (TEOS) after slowly heating to 70°C. Continue to react for 18h, and finally get light blue translucent SiO 2 Seed solution; b. SiO 2 growth of seeds

[0049] Add 160ml of absolute ethanol and 15ml of concentrated ammonia water with a mass fraction of 25% in a 500ml three-neck flask, mix well under stirring at a speed of 250rpm, then add 3ml of SiO2 seeds dropwise, and keep the constan...

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Abstract

The invention provides an intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions. The material is synthesized by steps of synthesis and purification of monodisperse SiO2 nanoparticles, preparation of a photonic crystal precursor solution, manufacturing of a photonic crystal hydrogel material forming mold and preparation of hydrogel, wherein the prepared intelligent photonic crystal materials can be used for monitoring and removing uranyl ions in water. A signal indicating function of the intelligent photonic crystal material and an adsorption and removal performance of the hydrogel on the uranyl ions of the invention successfully solve the problems that a traditional adsorption material cannot detect the concentration of UO2<2+> in the solution in situ and display an adsorption degree of an adsorbent in real time, show high adsorption capacity on the removal of UO2<2+>, has the lowest detection concentration of UO2<2+> of 10 nM, and meet requirements on detection sensitivity in practical application.

Description

technical field [0001] The invention belongs to the technical field of photonic crystals, in particular to an intelligent photonic crystal material for simultaneously monitoring and removing uranyl ions. Background technique [0002] Uranium is a radioactive element widely distributed in nature, and its half-life can be as long as 4.5×10 9 year. Elemental metal uranium is chemically active and exists mainly in the form of combined uranium in nature. With the aggravation of environmental pollution and energy crisis, nuclear energy fueled by uranium is becoming more and more popular as a new type of low-carbon energy. Because of the rapid development of the nuclear industry, there are more and more reasons for uranium pollution, such as: uranium mining and refining, discharge of nuclear waste liquid from nuclear power plants and abnormal leakage, research and development of nuclear weapons, etc. Uranium pollution poses a great threat to human health and the environment. Ur...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/28B01J20/10G21F9/04G21F9/12
Inventor 吴燕肖福兵史雯慧
Owner HUNAN UNIV
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