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Preparation method of layered double-metal-hydroxide LDH-C13-I crystal whisker and application thereof

A layered bimetallic and hydroxide technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of lengthy routes and high preparation costs, and achieve energy saving, large specific surface area, and simple preparation methods The effect of environmental protection

Active Publication Date: 2018-09-11
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the preparation of whisker-like LDH compound technical route lengthy in the prior art, the deficiencies such as high preparation cost, provide a kind of layered double metal hydroxide LDH-Cl 3 The preparation method of -1 whisker

Method used

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  • Preparation method of layered double-metal-hydroxide LDH-C13-I crystal whisker and application thereof
  • Preparation method of layered double-metal-hydroxide LDH-C13-I crystal whisker and application thereof
  • Preparation method of layered double-metal-hydroxide LDH-C13-I crystal whisker and application thereof

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Experimental program
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Embodiment 1～6

[0031] A kind of layered double metal hydroxide LDH-Cl 3 -I whisker, its chemical formula is, the preparation method flow chart is as shown in Figure 2, comprises the following steps:

[0032] S1. Preparation of MgI 2 solution, to prepare AlCl 3 solution, these two solutions were mixed in equal volumes in a beaker under stirring, and the pH value of the mixed system was adjusted to pH=7.50 with 0.02mol / L NaOH solution;

[0033] S2. Precipitating agent is prepared, and the precipitating agent is a mixed solution of NaCl and NaOH;

[0034] S3. Add a precipitant to the mixed solution of S1 while stirring until the pH value of the system is 8.3, then place the system in a sunny place and expose it to the wind and sun for 128 hours, filter and wash the precipitate, and dry to obtain the sample , During the 128 hours, add 0.020mol / L NaOH solution every 6 hours. The amount added each time is: first measure the pH value of the current system, and then add alkali to increase the pH ...

Embodiment 6

[0036] MgI of Example 6 2 solution and AlCl 3 The mixed solution of the solution is prepared from Qinghai salt lake bittern.

[0037] The parameters of specific embodiments are shown in Table 1, wherein Mg in S1 2+ Concentration is A mol / L, Al 3+ The concentration is B mol / L; the NaCl concentration in S2 is C mol / L; the NaOH concentration is D mol / L; the pH value of the reaction system in S3 is E.

[0038] Table 1

[0039]

[0040]

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Abstract

The invention discloses a preparation method of a layered double-metal-hydroxide LDH-C13-I crystal whisker and application thereof. The preparation method comprises the following steps of S1, preparing an MgI2 solution and an AlCl3 solution, mixing the two solutions, and alkalifying to adjust a pH value of the mixed solution to be 7.50; S2, preparing a precipitator, wherein the precipitator is a mixed solution of NaCl and NaOH; S3, adding the precipitator into the mixed solution in the S1 until a system pH value is 8.3, carrying out evaporative crystallization until completely precipitating, detecting the system pH every other 5.7 to 6.3h during an evaporation process, alkalifying to enable the system pH value to be increased by 0.05, filtering, washing and precipitating to obtain the layered double-metal-hydroxide LDH-C13-I crystal whisker. According to the preparation method provided by the invention, the LDH-C13-I crystal whisker with a special shape, composition and a crystal structure is formed through controlling the feed ratio, the reaction system pH value, the reaction temperature and the reaction time; the preparation method is simple, environmental-friendly, high-efficient and energy-saving; the obtained LDH-C13-I crystal whisker can be widely applied to toughening a reinforced material, a catalytic material, a flame-resistant material and an adsorbent material.

Description

technical field [0001] The invention belongs to the field of layered double metal hydroxide materials, more specifically, relates to a kind of layered double metal hydroxide LDH-Cl 3 -1 Preparation method and application of whiskers. Background technique [0002] Layered double hydroxide (Layered Double Hydroxide, LDH) is a general term for hydrotalcite (Hydrotalcite, HT) and hydrotalcite-like compounds (Hydrotalcite-Like Compounds, HTLc), is an important class of inorganic functional materials, with catalytic, Adsorption, flame retardant and other functions, is an environmentally friendly multifunctional inorganic material. The most typical LDH is Mg 6 A l2 (OH) 16 CO 3 .4H 2 O, also known as magnesium aluminum hydrotalcite, if the Mg in this magnesium aluminum hydrotalcite 2+ 、A1 3+ or CO 3 2- Ions are replaced by other ions to obtain hydrotalcite-like (HTLc). [0003] The general formula of HTLc is: (where M 2+ For divalent metal ions, such as Mg 2+ 、Ni 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/62C30B29/12C30B7/14
CPCC30B7/14C30B29/12C30B29/62
Inventor 吴健松
Owner LINGNAN NORMAL UNIV
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