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A kind of preparation method of palm bark loaded nano titanium dioxide photocatalyst

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

Inactive Publication Date: 2018-02-06
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 soil and impurities, put it in a container and soak it in water for 3 to 5 days to remove non-fibrous substances, cut the palm bark into small pieces, wash with water, and dry Carry out pulverization afterward, obtain pretreatment palm bark;

[0020] (2) Palm bark oxidation treatment: In the reactor, add deionized water: 35 mL, potassium persulfate: 15 g, after dissolving, slowly add 19 mL of concentrated sulfuric acid, stir and cool to room temperature, then add pre- Treatment of palm bark: 15g, soak at room temperature for 5 hours, boil for 10 minutes, wash with deionized water until neutral after cooling, separate solid and liquid, and dry to obtain oxidized palm bark;

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

Embodiment 2

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

[0024] (2) Palm bark oxidation treatment: In the reactor, add deionized water: 32 mL, potassium persulfate: 12 g, after dissolving, slowly add 20 mL of concentrated sulfuric acid, stir and cool to room temperature, then add pre- Treatment of palm bark: 18g, soak at room temperature for 4 hours, boil for 10 minutes, wash with deionized water until neutral after cooling, separate solid from liquid, dry to obtain oxidized palm bark;

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

Embodiment 3

[0027] (1) Palm bark pretreatment: Wash the palm bark with water to remove soil and impurities, put it in a container and soak it in water for 3 to 5 days to remove non-fibrous substances, cut the palm bark into small pieces, wash with water, and dry Carry out pulverization afterward, obtain pretreatment palm bark;

[0028] (2) Palm bark oxidation treatment: In the reactor, add deionized water: 40 mL, potassium persulfate: 18 g, after dissolving, slowly add 17 mL of concentrated sulfuric acid, stir and cool to room temperature, then add pre- Treatment of palm bark: 10g, soak at room temperature for 6 hours, boil for 10 minutes, wash with deionized water until neutral after cooling, separate solid from liquid, dry to obtain oxidized palm bark;

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

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Abstract

The invention discloses a preparation method of palm bark loaded nano-titanium dioxide photocatalyst, which is characterized in that the pretreated palm bark is further treated with deionized water, potassium persulfate and concentrated sulfuric acid, solid-liquid separation, and drying to obtain Oxidized palm bark; then, in the reactor, add according to the following composition mass percentage, deionized water: 85~90%, nano-titanium dioxide powder: 1~5%, oxidized palm bark: 8~12%, stir evenly Then put it in 20kHz ultrasonic wave for 30~40 minutes, then transfer it to a high-pressure reactor, screw on the lid, seal it, raise the temperature to 180°C, react for 8~10 hours, cool naturally to room temperature, open it, filter and wash with deionized water , and dried at 180° C. to obtain nano-titanium dioxide photocatalyst supported by palm bark. The invention has the characteristics of simple preparation method, good stability, degradability and environmental friendliness; it has the characteristics of mild reaction conditions, high catalytic activity, less dosage and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a method for preparing a palm bark-supported nano-titanium dioxide photocatalyst and its application in wastewater treatment. Background technique [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. An effective way to overcome this shortcoming is to prepare supported photocatalysts. Compared with s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J21/06C02F1/32
CPCY02W10/37
Inventor 李慧芝李冬梅卢燕
Owner UNIV OF JINAN
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