Carbon-based material based ion collection method

A carbon-based material and ion technology, applied in the field of water treatment, to achieve the effect of simple preparation process, easy operation and high universality

Active Publication Date: 2018-12-04
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method has simple preparation process, easy operation, low energy consumption, solves the difficult problem of removing salt ions in low-concentration solutions in the water puri

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  • Carbon-based material based ion collection method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] TEM testing of ion collection in carbon nanotubes

[0041]The multi-walled carbon nanotubes with an inner diameter of 5-15 nm were ultrasonically treated with analytically pure ethanol for 20 minutes, washed with deionized water, and then placed in an oven at 60° C. for 24 hours to dry. Soak the treated carbon nanotubes in 0.015M NaCl solution for 0.5 hours, then take them out, use TEM to observe the ion collection in the carbon nanotubes, and scan the obtained element distribution map to analyze the distribution of ions inside and outside the carbon nanotubes Condition. Experimental results show that the concentration of ions collected in carbon nanotubes is 2-3 orders of magnitude higher than that in the initial solution (see image 3 (a)).

Embodiment 2

[0043] EDX tests the ratio of elements present in carbon nanotubes

[0044] The multi-walled carbon nanotubes with an inner diameter of 5-15 nm were ultrasonically treated with analytically pure ethanol for 20 minutes, washed with deionized water, and then dried in an oven at 60° C. for 24 hours. Place the treated carbon nanotubes in 0.015-0.25M NaCl solution and soak them for 0.5 hours, take them out, and conduct EDX to detect the distribution of elements inside and outside the carbon nanotubes. The experimental results show that the concentration of ions collected in the carbon tube is 2-3 orders of magnitude higher than the concentration in the initial solution (see image 3 (b)).

Embodiment 3

[0046] TEM testing of ion collection in carbon nanotubes

[0047] The multi-walled carbon nanotubes with an inner diameter of 5-15 nm were ultrasonically treated with analytically pure ethanol for 20 minutes, washed with deionized water, and then placed in an oven at 60° C. for 24 hours to dry. Place the treated carbon nanotubes in 0.034M KCl solution and soak them for 0.5 hours, then take them out, use TEM to observe the ion collection in the carbon nanotubes, and scan the element distribution to represent the distribution of ions inside and outside the carbon nanotubes. Experimental results show that the concentration of ions collected in carbon nanotubes is 2-3 orders of magnitude higher than that in the initial solution (see Figure 4 ).

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Abstract

The invention discloses a carbon-based material based ion collection method. The method includes the following steps: (1) performing pretreatment on a carbon-based material; and (2) soaking the pretreated carbon-based material obtained by the step (1) in a salt solution. The step (1) includes the following steps: a, performing ultrasonic processing on the carbon-based material in a solution; and b, washing the carbon-based material processed by ultrasonic with deionized water, and performing drying for later use. The method has high universality, and can be used in water solution of salt likesodium salt, potassium salt and chlorine salt or organic solutions. The method is simple in preparation process, easy in operation and low in energy consumption; the problem that salt ions are hard toremove during water purification can be solved; a new approach to enrich ions can be opened up; and the method has important meanings in the field of water treatment and good application and market promotion prospects.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a carbon-based material-based ion collection method. Background technique [0002] With the rapid growth of the global population and the process of large-scale industrialization, clean fresh water resources are increasingly scarce. How to obtain clean and cheap fresh water is a difficult problem facing the world, especially in developing countries with relatively short water resources like my country. The problem of scarcity of resources is particularly acute. Therefore, the desalination of seawater and the purification of inferior water are one of the important ways to effectively solve the problem of water shortage [Nature 452, 301 (2008)]. [0003] In recent years, with the rapid development of nanotechnology, water purification membranes based on nanotechnology provide an important opportunity for technological breakthroughs such as improving the water purification...

Claims

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Application Information

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IPC IPC(8): C01B32/178C02F1/58C01B32/05
CPCC01B2202/10C01P2002/85C01P2004/04C02F1/58C02F2101/10C02F2101/101C02F2101/12C02F2101/163
Inventor 方海平闫隆石国升梁珊珊王学良方钢
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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