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Surface imprinting Fe<3+> potassium tetratitanate crystal whisker adsorption agent and preparation method thereof

A potassium tetratitanate, surface imprinting technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of inability to use industrialized large-scale production, high preparation and operation costs, and small scale of wastewater treatment, Achieve the effect of promoting effective dispersion, excellent adsorption capacity, and improving surface polarity

Active Publication Date: 2019-01-15
QINGDAO UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of method has high material preparation and operation costs, and the small scale and low efficiency of treating wastewater can not be used in industrialized large-scale production

Method used

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  • Surface imprinting Fe&lt;3+&gt; potassium tetratitanate crystal whisker adsorption agent and preparation method thereof
  • Surface imprinting Fe&lt;3+&gt; potassium tetratitanate crystal whisker adsorption agent and preparation method thereof
  • Surface imprinting Fe&lt;3+&gt; potassium tetratitanate crystal whisker adsorption agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A surface imprinted Fe 3+ Preparation method of potassium tetratitanate whisker adsorbent, such as figure 1 As shown, the synthesis process steps include:

[0028] 1. Add 0.1 mol of titanium isopropoxide and 0.2 mol of acetylacetone to 180 mL of 0.015 mol / L nitric acid solution, and stir at 60°C for 8 hours to prepare TiO 2 Nano sol solution.

[0029] 2. Take a certain amount of potassium tetratitanate whiskers, soak in 1mol / L hydrochloric acid solution to protonate the surface, then filter, wash, and dry. Take 5.0 g of protonated potassium tetratitanate whiskers, soak in 250 mL of a solution containing 14.8 mmol of tetrabutylammonium hydroxide, and ultrasonically disperse the suspension for 2 hours to obtain a protonated titanate suspension.

[0030] 3. Put 10mL of TiO prepared in step 1 2 The nanosol solution was added dropwise to 100 mL of the protonated titanate suspension prepared in step 2, and stirred at 60°C for 24 hours. The formed product was filtered, washed, dried,...

Embodiment 2

[0034] This embodiment adopts the preparation method of embodiment 1 for implementation, the difference lies in:

[0035] In step 4, accurately weigh 0.4849g (0.0018mol) of FeCl 3 • 6H 2 O was dissolved in 150.0 mL of 0.2mol / L acetic acid solution under stirring and heating conditions, and then 1.50 g of chitosan powder was added to the reaction solution. The reaction solution was stirred and refluxed for 1.0 hour.

Embodiment 3

[0037] This example is implemented using the preparation method of Example 1. The difference is that:

[0038] In step 4, accurately weigh out 0.9650g (0.0036mol) of FeCl 3 • 6H 2 O was dissolved in 150.0 mL of 0.2mol / L acetic acid solution under stirring and heating conditions, and then 1.50 g of chitosan powder was added to the reaction solution. The reaction solution was stirred and refluxed for 1.0 hour.

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Abstract

The invention discloses a surface imprinting Fe<3+> potassium tetratitanate crystal whisker adsorption agent and a preparation method thereof. A synthesis process comprises the steps of (1) loading nanometer TiO2 onto protonation potassium tetratitanate crystal whisker surfaces to obtain crystal whisker composite materials; (2) mixing Fe<3+> and chitosan with the obtained crystal whisker compositematerials; adding crosslinking agents; performing illumination so that a reaction system performs crosslinking polymerization and imprinting separation in a scattered state; (3) removing Fe<3+> templates. By using a surface molecular imprinting technology, the Fe<3+> is imprinted onto the potassium tetratitanate crystal whiskers; the goal of modifying the potassium tetratitanate crystal whiskersis achieved; the adsorption agent with selective adsorption capability on Fe<3+> is obtained; the preparation method achieves the environment-friendly effects; the product dispersion performance is high; the ion selectivity is high.

Description

Technical field [0001] The invention relates to the field of adsorption material synthesis, in particular to a surface imprinted Fe 3+ A potassium tetratitanate whisker adsorbent and a preparation method thereof. Background technique [0002] In the field of adsorption, especially in the field of green chemistry for wastewater treatment and heavy metal resource recovery, the prior art usually uses imprinting technology, graft modification technology or electrochemical methods to achieve selective adsorption of heavy metals, such as the following material synthesis and adsorption solutions : [0003] ①Fe 3+ Selective separation of target Fe by magnetic imprinting composite 3+ . Specifically, magnetic nano Fe 3 O 4 The particles are acidified with polyethylene glycol, and ammonia water and ethyl orthosilicate are added to obtain magnetic nanoparticles, which are then combined with ethylene glycol dimethacrylate and hydrated FeCl 3 The reaction and polymerization are initiated to ob...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28
CPCB01J20/268B01J20/28014
Inventor 刘娟杨晓宇
Owner QINGDAO UNIV OF SCI & TECH
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