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Titanium dioxide/schwertmannite composite catalyst as well as preparation method and application thereof

A technology of composite catalysts and Shi's minerals, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low iron dissolution, high operating costs, and poor treatment effects, and achieve The effect of low iron dissolution, improved efficiency, and obvious synergistic effect

Active Publication Date: 2017-05-17
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the traditional Fenton technology, such as high operating cost or poor treatment effect, the purpose of the present invention is to provide a composite catalyst composed of titanium dioxide and Schwartz minerals, which has good stability, visible light response, High catalytic performance, low iron dissolution, etc.

Method used

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  • Titanium dioxide/schwertmannite composite catalyst as well as preparation method and application thereof
  • Titanium dioxide/schwertmannite composite catalyst as well as preparation method and application thereof
  • Titanium dioxide/schwertmannite composite catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) The preparation method of Shi's mineral:

[0038] 6 mL 30% H 2 o 2 The solution was slowly added to 494 mL of ferric sulfate solution, and the above mixed solution was placed in an air bath shaking box at 180 rpm and shaken at 28°C for 24 hours. Separated by filtration and washed with deionized water until neutral, dried, ground for use, recorded as Sh.

[0039] (2) The preparation method of titanium dioxide / Sch's mineral composite material:

[0040] TiO 2 mixed with Sh (TiO 2 The mass fraction is 20%), with a planetary ball mill at 20 Hz for 4 hours, with a ball-to-material ratio of 25:1, to prepare a photo-Fenton catalyst for treating dye wastewater.

Embodiment 2

[0042] (1) The preparation method of Shi's mineral: with embodiment 1.

[0043] (2) The preparation method of titanium dioxide / Sch's mineral composite material:

[0044] TiO 2 mixed with Sh (TiO 2 The mass fraction is 20%), with a planetary ball mill at 20 Hz for 4 hours, with a ball-to-material ratio of 30:1, to prepare a photo-Fenton catalyst for treating dye wastewater.

Embodiment 3

[0046] (1) The preparation method of Shi's mineral: with embodiment 1.

[0047] (2) The preparation method of titanium dioxide / Sch's mineral composite material:

[0048] TiO 2 mixed with Sh (TiO 2 The mass fraction is 3%), with a planetary ball mill at 30 Hz for 3 hours, with a ball-to-material ratio of 25:1, to prepare a photo-Fenton catalyst for treating dye wastewater.

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Abstract

The invention discloses a titanium dioxide / schwertmannite composite catalyst as well as a preparation method and an application thereof. The titanium dioxide / schwertmannite composite catalyst is formed by loading nano titanium dioxide on schwertmannite through a ball milling method. The catalyst is simple in preparation method and low in cost, and is environmentally friendly; when the catalyst is applied to photo-Fenton degradation of organic wastewater, the catalyst has the advantages of high stability, high catalytic performance and low iron dissolving-out amount.

Description

technical field [0001] The invention relates to a titanium dioxide / Sch's mineral composite catalyst and its preparation method, and its application in photo-Fenton degradation of organic wastewater, belonging to the technical field of dye wastewater treatment. Background technique [0002] As an advanced treatment technology, advanced oxidation technology (AOPs) has the characteristics of easy operation, high removal efficiency, thorough oxidation and easy control. Among them, the photo-Fenton method can promote Fe 3+ and Fe 2+ cycle, generating more hydroxyl radicals, thereby converting refractory organics into harmless small molecules, even CO 2 and H 2 O. However, the following disadvantages limit its application in the actual treatment process: 1) the photo-Fenton process has strict requirements on the reaction pH, and the reaction pH is usually 2 to 4; 2) a large amount of iron ions remain in the solution, which affects the color of the water body and produces A la...

Claims

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Application Information

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IPC IPC(8): B01J27/053C02F1/30C02F101/38
CPCC02F1/30B01J27/053C02F2101/38C02F2101/308B01J35/39Y02W10/37
Inventor 曾淳许银汪形艳葛飞刘云游志敏刘兴旺陈琪
Owner XIANGTAN UNIV
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