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Preparing method of palm bark loaded nanometer titanium dioxide photocatalyst

A nano-titanium dioxide, palm bark technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of complex and difficult recycling process, and achieve environmental friendliness , good stability, excellent mechanical stability effect

Inactive Publication Date: 2016-07-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a photocatalyst, nano-titanium dioxide has strong oxidation ability and the ability to absorb and degrade pollutants under ultraviolet light irradiation. Nano-titanium dioxide photocatalyst has the characteristics of high efficiency, wide catalytic range and effective removal of various organic pollutants. There are broad application prospects in the field of treatment and air purification. In the early research on titanium dioxide photocatalysis, most of them used its colloid and particle suspension system to degrade organic pollutants, but the recovery process is very complicated and difficult.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Palm bark pretreatment: Wash the palm bark with water to remove dirt and impurities, put it in a container and soak in water for 3~5 days to remove non-fibrous substances, cut the palm bark into small pieces, wash with water, and dry Afterwards, it is crushed to obtain pretreated palm bark;

[0020] (2) Palm bark oxidation treatment: In the reactor, separately add, deionized water: 35mL, potassium persulfate: 15g, after dissolution, slowly add 19mL of concentrated sulfuric acid, stir and cool to room temperature, then add the pretreated palm Bark: 15g, soaked at room temperature for 5h, boiled for 10min, washed with deionized water to neutrality after cooling, solid-liquid separation, and dried to obtain oxidized palm bark;

[0021] (3) Preparation of palm bark loaded nano-titanium dioxide photocatalyst. In the reactor, separately add, deionized water: 88mL, nano-titanium dioxide powder: 2g, oxidized palm bark: 10g, stir well and place in 20kHz ultrasonic wave Treated f...

Embodiment 2

[0023] (1) Palm bark pretreatment: Wash the palm bark with water to remove dirt and impurities, put it in a container and soak in water for 3 to 5 days to remove non-fibrous substances, cut the palm bark into small pieces, wash with water, and dry Afterwards, it is crushed to obtain pretreated palm bark;

[0024] (2) Palm bark oxidation treatment: In the reactor, separately add, deionized water: 32mL, potassium persulfate: 12g, after dissolution, slowly add 20mL of concentrated sulfuric acid, stir and cool to room temperature, then add the pretreated palm Bark: 18g, soaked at room temperature for 4 hours, boiled for 10 minutes, washed with deionized water to neutrality after cooling, solid-liquid separation, and dried to obtain oxidized palm bark;

[0025] (3) Preparation of palm bark loaded nano-titanium dioxide photocatalyst. In the reactor, add deionized water: 87mL, nano-titanium dioxide powder: 5g, oxidized palm bark: 8g, stir well and place in 20kHz ultrasonic wave Treated f...

Embodiment 3

[0027] (1) Palm bark pretreatment: Wash the palm bark with water to remove dirt and impurities, put it in a container and soak in water for 3~5 days to remove non-fibrous substances, cut the palm bark into small pieces, wash with water, and dry Afterwards, it is crushed to obtain pretreated palm bark;

[0028] (2) Palm bark oxidation treatment: In the reactor, separately add, deionized water: 40mL, potassium persulfate: 18g, after dissolution, slowly add 17mL of concentrated sulfuric acid, stir and cool to room temperature, then add the pretreated palm Bark: 10g, soaked at room temperature for 6h, boiled for 10min, washed with deionized water to neutrality after cooling, solid-liquid separation, and dried to obtain oxidized palm bark;

[0029] (3) Preparation of palm bark loaded nano-titanium dioxide photocatalyst. In the reactor, separately add, deionized water: 85mL, nano-titanium dioxide powder: 4g, oxidized palm bark: 11g, stir well and place in 20kHz ultrasonic wave Treated f...

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Abstract

The invention discloses a preparing method of a palm bark loaded nanometer titanium dioxide photocatalyst.The preparing method is characterized in that deionized water, potassium persulfate and concentrated sulfuric acid are used for treating pretreated palm bark, solid and liquid separating is carried out, drying is carried out, and oxidized palm bark is obtained; then, by mass, 85-90% of deionized water, 1-5% of nanometer titanium dioxide powder and 8-12% of oxidized palm bark are added into a reactor, the mixture is stirred uniformly and then placed into 20 kHz ultrasonic waves to be treated for 30-40 min, then the mixture is transferred into a high-pressure reaction kettle, a cover is screwed off, the reaction kettle is sealed, the temperature is raised to 180 DEG C, the reaction is carried out for 8-10 h, the reaction kettle is naturally cooled to the room temperature to be opened, and the product is filtered, washed with the deionized water and dried at the temperature of 180 DEG C, so that the palm bark loaded nanometer titanium dioxide photocatalyst is obtained.The preparing method has the advantages that the preparing method is simple, stability is good, the photocatalyst is degradable and environmentally friendly, the reaction condition is mild, catalytic activity is high, and the use amount is small.

Description

Technical field [0001] The present invention relates to the technical field of the preparation of supported catalysts, and particularly relates to a preparation method of a palm bark loaded nano-titanium dioxide photocatalyst and its application in wastewater treatment. Background technique [0002] As a kind of photocatalyst, nano-titanium dioxide has strong oxidizing ability and ability to adsorb and degrade pollutants under ultraviolet light irradiation. Nano-titanium dioxide photocatalyst has the characteristics of high efficiency, wide catalytic range and effective removal of various organic pollutants. There are broad application prospects in the field of treatment and air purification. Early research on titanium dioxide photocatalysis mostly used its colloidal and particle suspension system to degrade organic pollutants, but the recovery process is very complicated and difficult. An effective method to overcome this shortcoming is to prepare a supported photocatalyst. Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J21/06C02F1/32
CPCC02F1/32B01J21/063B01J31/38C02F2101/308B01J35/39Y02W10/37
Inventor 李慧芝李冬梅卢燕
Owner UNIV OF JINAN
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