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Preparation method for porphyrin-functionalized titanium dioxide-montmorillonite nano-complex

A nanocomposite, titanium dioxide technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, special compound water treatment, etc., can solve the problem of reduced chemical active sites, large band gap, and reduced activity and other issues to achieve the effect of increasing catalytic efficiency, improving catalytic efficiency, and enhancing active sites

Inactive Publication Date: 2019-03-08
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the disadvantages of easy adsorption and aggregation of a single titanium dioxide nanoparticle, its chemical active sites are reduced, which leads to a decrease in its activity.
Moreover, the forbidden band width of titanium dioxide is relatively large, and it can only absorb ultraviolet light in sunlight.

Method used

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  • Preparation method for porphyrin-functionalized titanium dioxide-montmorillonite nano-complex
  • Preparation method for porphyrin-functionalized titanium dioxide-montmorillonite nano-complex
  • Preparation method for porphyrin-functionalized titanium dioxide-montmorillonite nano-complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 5g of montmorillonite, 5g of butyl titanate, 2.5g of tetracarboxyphenylporphyrin and 5g of absolute ethanol were selected as raw materials. First add butyl titanate to absolute ethanol, and stir magnetically at room temperature to obtain a transparent solution I. The magnetic stirring speed is 200r / min, and the magnetic stirring time is 90 minutes. Slowly add the transparent solution I dropwise into the nitric acid solution (the concentration of the nitric acid solution is 1 mol / L), stir at room temperature to obtain a yellow transparent solution II, and control the pH value of the solution to 2.5. Add montmorillonite to 5 g of deionized water, and prepare montmorillonite suspension III through ultrasonic treatment and high-speed dispersion (dispersion speed 1000r / min). The solution II was slowly added dropwise to the montmorillonite suspension III, and stirred to obtain a white solution IV, the stirring temperature was controlled at 25°C, the stirring speed was 300r / mi...

Embodiment 2

[0039] 5g of montmorillonite, 2.5g of butyl titanate, 2.5g of tetracarboxyphenylporphyrin and 5g of absolute ethanol were selected as raw materials. First add butyl titanate to absolute ethanol, and stir magnetically at room temperature to obtain a transparent solution I. The magnetic stirring speed is 200r / min, and the magnetic stirring time is 60 minutes. Slowly add the transparent solution I dropwise into the nitric acid solution (the concentration of the nitric acid solution is 1 mol / L), stir at room temperature to obtain a yellow transparent solution II, and control the pH value of the solution to 2.5. Montmorillonite suspension III was prepared by adding montmorillonite to 5 g of deionized water, ultrasonic treatment, and high-speed dispersion (dispersion speed 1000 r / min). The solution II was slowly added dropwise to the montmorillonite suspension III, and stirred to obtain a white solution IV, the stirring temperature was controlled at 25°C, the stirring speed was 300r...

Embodiment 3

[0042]5g of montmorillonite, 10g of butyl titanate, 5g of tetracarboxyphenylporphyrin and 5g of absolute ethanol were selected as raw materials. First add butyl titanate to absolute ethanol, and stir magnetically at room temperature to obtain transparent solution I. The magnetic stirring speed is 200r / min, and the magnetic stirring time is 120 minutes. Slowly add the transparent solution I dropwise into the nitric acid solution (the concentration of the nitric acid solution is 1 mol / L), stir at room temperature to obtain a yellow transparent solution II, and control the pH value of the solution to 2.5. Add montmorillonite to 5 g of deionized water, and prepare montmorillonite suspension III through ultrasonic treatment and high-speed dispersion (dispersion speed 1000r / min). The solution II was slowly added dropwise to the montmorillonite suspension III, and stirred to obtain a white solution IV, the stirring temperature was controlled at 25°C, the stirring speed was 300r / min, ...

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Abstract

The invention discloses a preparation method for a porphyrin-functionalized titanium dioxide-montmorillonite nano-complex. The preparation method comprises the following steps: adding tetrabutyl orthotitanate into absolute ethyl alcohol, and stirring to obtain a transparent solution I; slowly adding the transparent solution I into nitric acid solution dropwise to obtain a solution II; adding montmorillonite into deionized water to prepare montmorillonite suspension III; slowly adding the solution II into the montmorillonite suspension III, and stirring to obtain a white solution IV; quickly pouring the white solution IV into a reaction kettle, and placing reaction kettle into a microwave hydrothermal reaction kettle for reacting; after the reaction is ended, naturally cooling to room temperature, then, filtering, performing centrifugal washing, and drying to obtain a product A; dispersing the product A into the deionized water; then, performing mixed reaction with a tetraphenylporphyrin solution; and after the reaction is ended, performing centrifugal treatment, washing and drying to obtain a final product. The nano-complex prepared by adopting the process disclosed by the invention has the advantages that on one hand, the catalytic efficiency of the nano-complex is improved, and on the other hand, the optical response range of the nano-complex is expanded.

Description

technical field [0001] The invention relates to a preparation method of a porphyrin-functionalized titanium dioxide-montmorillonite nanocomposite, belonging to the technical field of preparation of nanocomposite materials. Background technique [0002] Titanium dioxide has aroused widespread interest due to its high chemical stability, light corrosion resistance, large photocatalytic reaction driving force, high photocatalytic activity, non-toxicity and low cost. Nanoscale titanium dioxide exhibits more excellent photocatalytic ability due to its unique nanostructure. The semiconductor titanium dioxide photocatalyst will generate photogenerated electrons and holes under light conditions. The photogenerated holes have strong oxidative properties and are mainly used in environmental photocatalysis, which can photocatalytically degrade pollutants, antibacterial, antivirus, antifouling, and antifog , while photogenerated electrons have strong reducibility and are mainly used in...

Claims

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Application Information

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IPC IPC(8): B01J21/16B01J31/38C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J21/16B01J31/38C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J35/393B01J35/23B01J35/399B01J35/39
Inventor 主曦曦高岩杨翠英刘青云
Owner SHANDONG UNIV OF SCI & TECH
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