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Preparation of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and application of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst in degradation of dyeing wastewater

A technology of inorganic polymers and composite catalysts, applied in physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, water pollutants, etc., can solve the problem of steel slag-based inorganic polymer-oxide semiconductors not found Problems such as literature and patent reports on dye degradation prepared by composite catalyst, to achieve the effect of simple and easy process, mild degradation conditions and short degradation time

Inactive Publication Date: 2012-10-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] By consulting a large number of patents and literature, no literature and patent reports on the preparation of steel slag-based inorganic polymer-oxide semiconductor composite catalysts and the use of the catalyst in dye degradation have been found.

Method used

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  • Preparation of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and application of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst in degradation of dyeing wastewater
  • Preparation of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and application of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst in degradation of dyeing wastewater
  • Preparation of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and application of steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst in degradation of dyeing wastewater

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Embodiment 1

[0047] Accurately weigh 1500g of steel slag raw material, take this as the measurement basis (100%), adopt the external mixing method, the dosage of chemical activator sodium silicate is 11% of the weight of steel slag, the mass ratio of water to steel slag (also called water slag ratio ) is 0.28. Pour the steel slag powder into a double-rotation and double-speed slurry mixer for stirring and dispersing; add the sodium silicate aqueous solution and stir at a high speed to form a uniformly mixed slurry; put the slurry into a triple mold of 40mm×40mm×160mm, Vibrate on a mortar vibrating table, and scrape it flat with a scraper to obtain a formed slurry test block. Put the formed test block into a standard curing box for 1 day of curing, then remove it from the mold, put it in a curing room for 7 days at room temperature, then put it into a sealed plastic bag, and then cure it at 65°C for 24 hours. The compressive strength of the test block is 25MPa , The flexural strength is 2....

Embodiment 2

[0050] All operation steps are identical with embodiment 1, just take by weighing solid Zn(NO 3 ) 2 ·6H 2 The amount of O was changed to 7.345 g and dissolved in 20 mL of distilled water; a steel slag-based inorganic polymer-zinc oxide semiconductor composite catalyst (labeled 5ZnO-polymer) with a theoretical loading of ZnO of 5% was obtained.

Embodiment 3

[0052] All operation steps are identical with embodiment 1, just take by weighing solid Zn(NO 3 ) 2 ·6H 2 The amount of O was changed to 14.69 g and dissolved in 20 mL of distilled water; an inorganic polymer-zinc oxide semiconductor composite catalyst (marked as 10ZnO-polymer) with a theoretical loading of ZnO of 10% was obtained.

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Abstract

The invention discloses a preparation of a steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and the application of the steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst in the degradation of dyeing wastewater. The preparation method relates to the synthesis of an inorganic polymer and the loading of a zinc oxide semiconductor and comprises the following steps: synthesizing a steel-slag-based inorganic polymer cementing material from an industrial solid waste steel slag under the excitation of sodium silicate, immersing the inorganic polymer cementing material into zinc nitrate aqueous solution, and baking the mixture to form the steel-slag-based inorganic polymer-zinc oxide semiconductor composite catalyst. The semiconductor composite catalyst is applied to the degradation reactions of congo red dye and methylene blue dye under ultraviolet light; and the highest degradation rates of both of the two dyes reach 100 percent to achieve high degradation rate and no secondary pollution. The preparation process of the semiconductor composite catalyst is simple and can implement a large-scale preparation and application.

Description

technical field [0001] The invention belongs to the preparation of an inorganic semiconductor composite catalyst and its application in the field of wastewater treatment, in particular to the preparation of a steel slag-based inorganic polymer-zinc oxide semiconductor composite catalyst and its application in degrading dye wastewater. Background technique [0002] my country is a big steel country. In 2010, my country's crude steel output was 626.65 million tons, accounting for about 44.3% of the world's steel output. [1] Every time 1 ton of crude steel is produced, 15%-20% of steel slag will be produced. In 2010 alone, the amount of steel slag discharged in my country exceeded 100 million tons. At present, the total amount of steel slag accumulated in domestic steelmaking plants exceeds 200 million tons, covering an area of ​​1 More than 10,000 mu, and the number is still increasing by more than 30 million tons every year [2] . The long-term storage of steel slag not only ...

Claims

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Application Information

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IPC IPC(8): B01J23/80C02F1/32C02F101/38
Inventor 张耀君刘礼才王丙丽倪路路王亚超
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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