A kind of surface imprinted fe3+potassium tetratitanate whisker adsorbent and preparation method thereof

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

Active Publication Date: 2021-07-02
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • 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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  • A kind of surface imprinted fe3+potassium tetratitanate whisker adsorbent and preparation method thereof
  • A kind of surface imprinted fe3+potassium tetratitanate whisker adsorbent and preparation method thereof
  • A kind of surface imprinted fe3+potassium tetratitanate whisker adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A surface imprinted Fe 3+ The preparation method of potassium tetratitanate whisker adsorbent, such as figure 1 As shown, the synthesis process steps include:

[0026] 1. Add 0.1mol titanium isopropoxide and 0.2mol acetylacetone to 180mL 0.015mol / L nitric acid solution, stir at 60°C for 8 hours to prepare TiO 2 Nanosol solution.

[0027] 2. Take a certain amount of potassium tetratitanate whiskers, soak in 1mol / L hydrochloric acid solution to make the surface protonated, then filter, wash and dry. Take 5.0 g of protonated potassium tetratitanate whiskers, soak them 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.

[0028] 3. Add 10mL of the TiO prepared in step 1 2 Add the nano-sol solution dropwise to 100 mL of the protonated titanate suspension prepared in step 2, stir at 60 °C for 24 h, filter the formed product, wash, dry, and burn at 3...

Embodiment 2

[0032] The present embodiment adopts embodiment 1 preparation method to carry out, and difference is:

[0033] In step 4, accurately weigh 0.4849 g (0.0018 mol) of FeCl 3 •6H 2 O was dissolved in 150.0 mL of 0.2 mol / 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 was stirred at reflux for 1.0 hour.

Embodiment 3

[0035] This embodiment adopts the preparation method of embodiment 1 to implement, and the difference is that,

[0036] In step 4, accurately weigh 0.9650 g (0.0036 mol) of FeCl 3 •6H 2 O was dissolved in 150.0 mL of 0.2 mol / 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 was stirred at reflux for 1.0 hour.

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Abstract

The invention discloses a surface imprinted Fe 3+ Potassium tetratitanate whisker adsorbent and preparation method thereof, the synthesis process steps include: ① loading nano TiO on the surface of protonated potassium tetratitanate whisker 2 Obtain whisker composite material; ② Fe 3+ Mix with chitosan and the obtained whisker composite material, add a crosslinking agent and light to make the reaction system crosslink and polymerize in a dispersed state and imprint and precipitate; ③ remove Fe 3+ template. By using surface molecular imprinting technology, the Fe 3+ Imprinted on the potassium tetratitanate whisker, to achieve the purpose of modifying the surface of the potassium tetratitanate whisker, to obtain a 3+ The adsorbent with selective adsorption capacity, the preparation method is environmentally friendly, the product has strong dispersibility, and 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+ Potassium tetratitanate whisker adsorbent and preparation method thereof. Background technique [0002] In the field of adsorption, especially in the green chemistry field of wastewater treatment and heavy metal resource recovery, the prior art usually uses imprinting technology, grafting modification technology or electrochemical methods to achieve selective adsorption of heavy metals, such as the following material synthesis and adsorption schemes : [0003] ① Fe 3+ Selective separation of target Fe by magnetically imprinted composites 3+ . Specifically, the magnetic nano-Fe 3 o 4 The particles were acidified with polyethylene glycol, and ammonia water and tetraethyl orthosilicate were added to obtain magnetic nanoparticles, and then mixed with ethylene glycol dimethacrylate and hydrated FeCl 3 React and initiate polymerization to ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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