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Magnetite hydrotalcite/cuprous oxide/titanium dioxide composite photocatalyst, as well as preparation method and application of composite photocatalyst

A technology of titanium dioxide and cuprous oxide, applied in the field of water treatment, can solve the problems of cathode corrosion, electron-hole recombination, etc., and achieve the effects of environmental friendliness, wide sources, and simple preparation method

Inactive Publication Date: 2015-12-02
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cu 2 O has problems such as easy electron-hole recombination and cathodic corrosion, which limits Cu 2 O application in practice

Method used

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  • Magnetite hydrotalcite/cuprous oxide/titanium dioxide composite photocatalyst, as well as preparation method and application of composite photocatalyst
  • Magnetite hydrotalcite/cuprous oxide/titanium dioxide composite photocatalyst, as well as preparation method and application of composite photocatalyst
  • Magnetite hydrotalcite/cuprous oxide/titanium dioxide composite photocatalyst, as well as preparation method and application of composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst, its preparation method comprises the following steps:

[0035] Add 200mL0.5mol / L copper sulfate solution (16g) into the Erlenmeyer flask, add 5g magnetite and 5g hydrotalcite, stir for 30min, slowly add 100mL0.5mol / L ascorbic acid solution (8.8g) and stir evenly, then add Stir 10g of titanium dioxide for 30min, slowly add 400mL of 1.5mol / L sodium hydroxide solution (24g, 40°C) while stirring under ultrasonic conditions, ultrasonicate at 40°C for 30min, then centrifuge, wash with water (3 times), Wash with alcohol (3 times), and finally dry in a vacuum oven (40° C.), and grind the obtained product to obtain the magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst.

[0036] figure 1 It is the XRD pattern of the magnetite hydrotalcite / cuprous oxide / titania photocatalyst obtained in this embodiment. It can be seen from the analysis of the figure that the baseline of magnetite is ...

Embodiment 2

[0044] A kind of magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst, its preparation method comprises the following steps:

[0045] Add 15 mL of 0.35 mol / L copper sulfate solution (0.8 g) into the Erlenmeyer flask, add 0.2 g of magnetite and 0.2 g of hydrotalcite, stir for 20 min, slowly add 4 mL of 0.5 mol / L ascorbic acid solution (0.4 g) and stir well , then add 0.5g of titanium dioxide and stir for 20min, slowly add 80mL of 0.5mol / L sodium hydroxide solution (1.6g, 30°C) while stirring under ultrasonic conditions, ultrasonicate for 20min at 30°C, then centrifuge and wash with water (3 times), alcohol washing (3 times), and finally dried in a vacuum oven (45° C.), and the resulting product was ground to obtain the magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst.

Embodiment 3

[0047] A kind of magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst, its preparation method comprises the following steps:

[0048] Add 100mL of 0.4mol / L copper sulfate solution (6.4g) into the Erlenmeyer flask, add 1.6g of magnetite and 1.6g of hydrotalcite, stir for 25min, slowly add 8mL of 4.5mol / L ascorbic acid solution (6.3g) and stir evenly , then add 3.6g of titanium dioxide and stir for 25min, slowly add 400mL of 0.8mol / L sodium hydroxide solution (12.8g, 35°C) while stirring under ultrasonic conditions, ultrasonicate for 25min at 35°C, then centrifuge and wash with water (3 times), alcohol washing (3 times), and finally dried in a vacuum oven (50° C.), and the resulting product is ground to obtain the magnetite hydrotalcite / cuprous oxide / titanium dioxide photocatalyst.

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Abstract

The invention discloses a magnetite hydrotalcite / cuprous oxide / titanium dioxide composite photocatalyst. The composite photocatalyst is prepared by the following steps: adding magnetite and hydrotalcite into a copper sulfate solution, stirring and mixing uniformly, then adding an ascorbic acid solution, stirring uniformly, adding titanium dioxide, stirring, adding a sodium hydroxide solution under the ultrasonic stirring condition, finally, carrying out ultrasonic treatment, centrifuging, washing by water, carrying out alcohol washing, drying and grinding to obtain the magnetite hydrotalcite / cuprous oxide / titanium dioxide composite photocatalyst. According to the composite photocatalyst, the related preparation process is simple, the raw materials are cheap and are environment-friendly, and the prepared magnetite hydrotalcite / cuprous oxide / titanium dioxide composite photocatalyst has high alga killing efficiency and high degradation rate of water body pollutants such as humic acid and phosphorus-containing substances and is suitable for the fields of water treatment and hydration treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a magnetite hydrotalcite / cuprous oxide / titanium dioxide composite photocatalyst and its preparation and application. Background technique [0002] Photocatalytic technology is widely used in the field of water treatment technology. At present, the photocatalytic technologies that have been studied more mainly include photo-Fenton system and semiconductor photocatalytic technology. [0003] Photo-Fenton reagent is the use of Fe 2+ / Fe 3+ and H 2 o 2 A photo-Fenton system is formed under light irradiation. The reason why it has very strong oxidation ability is because hydrogen peroxide can generate hydroxyl radicals with strong oxidation ability in the presence of catalyst iron (its oxidation potential is as high as +2.80V, second only to F 2 ), ·OH can undergo strong electrophilic addition reaction (its electron affinity is 569.3KJ), substitution reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/86C02F1/72C02F1/50C02F1/58C02F1/30
Inventor 陈金毅喻杏元李晶艾玉明蒋钦凤
Owner WUHAN INSTITUTE OF TECHNOLOGY
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