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Method for preparing loofah sponge supported nanometer titania photocatalyst

A nano-titanium dioxide, photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of complex and difficult recovery process, achieve high catalytic activity, simple operation, good physical and chemical The effect of stability

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) Loofah pretreatment: Wash the loofah with water to remove soil and impurities, put it in a container and soak it in water for 24 hours to remove non-fibrous substances, cut the loofah into small pieces, wash with water, dry and crush to obtain the pre-treated loofah processing loofah;

[0020] (2) Oxidation treatment of loofah: In the reactor, add deionized water: 46mL, potassium dichromate: 12g, slowly add 15mL of concentrated sulfuric acid after dissolving, stir and cool to room temperature, and then pretreat 15g Add loofah, soak at room temperature for 2.5 hours, wash with deionized water until neutral, separate solid from liquid, then soak in isopropanol for 5 hours, take it out and dry it to obtain oxidized loofah;

[0021] (3) Preparation of nano-titanium dioxide photocatalyst supported by loofah. In the reactor, add deionized water: 83mL, nano-titanium dioxide powder: 7g, oxidized loofah: 10g, stir well and place in 20kHz ultrasonic wave for 80min , then tra...

Embodiment 2

[0023] (1) Loofah pretreatment: Wash the loofah with water to remove soil and impurities, put it in a container and soak it in water for 24 hours to remove non-fibrous substances, cut the loofah into small pieces, wash with water, dry and crush to obtain the pre-treated loofah processing loofah;

[0024] (2) Loofah oxidation treatment: In the reactor, add deionized water: 50mL, potassium dichromate: 10g, slowly add 16mL of concentrated sulfuric acid after dissolving, stir and cool to room temperature, and then add 10g of pretreatment Add loofah, soak at room temperature for 2 hours, wash with deionized water until neutral, separate solid and liquid, then soak in isopropanol for 4 hours, take it out and dry, and get oxidized loofah;

[0025] (3) Preparation of nano-titanium dioxide photocatalyst supported by loofah. In the reactor, add deionized water: 86mL, nano-titanium dioxide powder: 5g, oxidized loofah: 9g, stir well and place in 20kHz ultrasonic wave for 70min , then tra...

Embodiment 3

[0027] (1) Loofah pretreatment: Wash the loofah with water to remove soil and impurities, put it in a container and soak it in water for 24 hours to remove non-fibrous substances, cut the loofah into small pieces, wash with water, dry and crush to obtain the pre-treated loofah processing loofah;

[0028] (2) Loofah oxidation treatment: In the reactor, add deionized water: 42mL, potassium dichromate: 15g, slowly add 17mL of concentrated sulfuric acid after dissolving, stir and cool to room temperature, and then pretreat 12g Add loofah, soak at room temperature for 3 hours, wash with deionized water until neutral, separate solid from liquid, then soak in isopropanol for 6 hours, take it out and dry it to obtain oxidized loofah;

[0029] (3) Preparation of nano-titanium dioxide photocatalyst supported by loofah. In the reactor, add deionized water: 80mL, nano-titanium dioxide powder: 8g, oxidized loofah: 12g, stir well and place in 20kHz ultrasonic wave for 60min , then transfer...

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Abstract

The invention discloses a method for preparing a loofah sponge supported nanometer titania photocatalyst.The method is characterized by comprising the steps that pretreated loofah sponges are oxidized in deionized water with potassium dichromate and concentrated sulfuric acid, and oxidized loofah sponges are obtained; then, 80% to 86% of deionized water, 4% to 10% of nanometer titania powder and 8% to 12% of the oxidized loofah sponges by mass are added to a reactor, the reactor is placed in ultrasonic waves of 20 kHz to be treated for 60 min to 100 min after the mixture is stirred to be uniform, then the mixture is transferred into a high-pressure reactor, a cap is screwed, sealing is carried out, the temperature is raised to 160 DEG C, reacting is carried out for 12 h to 15 h, natural cooling is carried out till room temperature is reached, filtering and deionized water washing are carried out, drying is carried out at the temperature of 160 DEG C, and the loofah sponge supported nanometer titania photocatalyst is obtained.The advantages that the preparation method is simple, good stability is achieved, degradation can be achieved, environment friendliness is achieved, the catalyst is easy to recycle, the reaction conditions of the photocatalyst are mild, catalytic activity is high, and the use amount is small are achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a method for preparing a loofah-loaded 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 single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/30
CPCC02F1/30B01J31/38B01J37/10C02F2305/10B01J35/39Y02W10/37
Inventor 李慧芝赵淑英许崇娟
Owner UNIV OF JINAN
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