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A method for preparing a glass fiber cloth-loaded nano-titanium dioxide photocatalytic reactor

A nano-titanium dioxide and photocatalytic reactor technology, applied in chemical instruments and methods, physical/chemical process catalysts, catalyst activation/preparation, etc., can solve the problems of large loss of catalyst active components, environmental pollution, easy condensation, etc.

Inactive Publication Date: 2011-11-30
伏宏彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Suspended Nano TiO 2 The specific surface is larger, it can be in full contact with the decomposed substances and fully receives light. Generally speaking, it has good photocatalytic performance in both solution and gas phase reactions, but it is easy to condense and not easy to settle, and the catalyst is difficult to recover. The loss of active components of the catalyst is large, which is not conducive to the regeneration and reuse of the catalyst.
In stationary phase TiO 2 The sol-gel method is the most commonly used catalyst preparation technology. The sol-gel method has the characteristics of simplicity, high photocatalytic activity, and high universality. The process needs to consume a lot of organic solvents, drying, continuous sintering is easy to make TiO 2 The film cracks, and a large amount of organic solvents will volatilize at the same time, causing environmental pollution

Method used

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  • A method for preparing a glass fiber cloth-loaded nano-titanium dioxide photocatalytic reactor
  • A method for preparing a glass fiber cloth-loaded nano-titanium dioxide photocatalytic reactor
  • A method for preparing a glass fiber cloth-loaded nano-titanium dioxide photocatalytic reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dilute polyvinyl acetate emulsion 801 with water to a concentration of 0.03g / L, add nano-titanium dioxide powder to prepare a dispersion with a concentration of titanium dioxide of 0.05g / L, use ammonia to adjust the pH of the dispersion to 9, and then use ultrasonic waves Disperse for about 5 minutes; soak the glass fiber cloth in the prepared dispersion for 30 minutes; then bake the glass fiber cloth at 120°C for 5 minutes, and obtain the finished product after natural cooling.

[0027] Put 3.0 g of the prepared glass fiber cloth loaded with nano-titanium dioxide into 50 ml of a methyl orange solution with a concentration of 15 mg / L. After irradiating at 57 cm under a D65 light source for 2 hours, the methyl orange degradation rate reached 65.13%.

Embodiment 2

[0029] Dilute polyvinyl acetate emulsion 102G with water to a concentration of 0.20g / L, add nano-titanium dioxide powder with a concentration of 0.06g / L, adjust the pH of the dispersion to 9 with ammonia water, and then disperse it with ultrasonic waves for about 5 minutes; The fiber cloth was soaked in the prepared dispersion for 30 minutes; finally, the glass fiber cloth was baked at 120°C for 5 minutes, and the finished product was obtained after natural cooling.

[0030] Put 3.0 g of the prepared glass fiber cloth loaded with nano-titanium dioxide into 50 ml of methyl orange solution with a concentration of 20 mg / L. After irradiating at 60 cm under two 15W ultraviolet lamps for 2 hours, the degradation rate of methyl orange reached 72.42%. .

Embodiment 3

[0032] Dilute polyvinyl acetate emulsion 102G with water to a concentration of 0.03g / L, add nano-titanium dioxide powder with a concentration of 0.05g / L, adjust the pH value of the dispersion to 9 with vinegar and ammonia water, and then disperse it with ultrasonic waves for about 5 minutes; The glass fiber cloth was immersed in the prepared dispersion for 30 minutes; the glass fiber cloth was baked at 120°C for 5 minutes, and the finished product was obtained after natural cooling.

[0033] Put 3.0 g of the prepared glass fiber cloth loaded with nano-titanium dioxide into a container containing 50 ml of 0.15 g / L active golden yellow R-4RFN, 10 g / LNaCl, 2.5 g / LNa 2 CO 3 In the composed simulated dye wastewater, the degradation rate reached 52.74% after being irradiated at 57cm under the D65 light source for 2 hours.

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Abstract

The invention discloses a method for preparing a nano-titanium dioxide photocatalytic reactor supported by glass fiber cloth, comprising the following steps: A. adding water to dilute polyvinyl acetate emulsion to a concentration of 0.03-0.20g / L, adding nano-titanium dioxide powder, the concentration 0.01-0.10g / L, use ammonia water to adjust the pH value of the dispersion to 9, and then use ultrasonic waves to disperse for about 5 minutes to obtain a dispersion; B. Soak the glass fiber cloth in the dispersion prepared in step A for 30-50 minutes ; C. Take out the impregnated glass fiber cloth and bake it at 110-130°C for 4-8 minutes, and get the finished product after natural cooling. The photocatalyst prepared by the method of the invention has high catalytic activity, simple method and low preparation cost.

Description

technical field [0001] The invention relates to a preparation method of a photocatalytic reactor, and more particularly relates to a method capable of preparing a glass fiber cloth-loaded nano-titanium dioxide photocatalytic reactor by using a polyvinyl acetate emulsion at a relatively low temperature. Background technique [0002] Nano TiO 2 Photocatalytic degradation of organic pollutants has attracted the attention of governments and researchers from various countries. Dyestuffs in printing and dyeing wastewater are one of the main organic pollutants, and traditional wastewater treatment methods such as flocculation, activated sludge, biological and physical and chemical methods are difficult to treat. Photocatalytic oxidation technology is a hot spot in current research, TiO 2 Stable and non-toxic, it can mineralize refractory biodegradable pollutants into small molecular inorganic substances such as water and carbon dioxide. Suspended Nano TiO 2 The specific surface...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/02C02F1/30
Inventor 伏宏彬颜丙更
Owner 伏宏彬