Modified titanium-containing furnace cinder catalyst with visible light catalytic activity and method for producing the same

Abstract

The invention relates to a modified titanium-bearing blast furnace slag catalyst with visible photocatalytic activity and a preparation method thereof, which belong to the field of material science. The compositions of crystal phase of the catalyst are 33 to 40 weight percent of perovskite, 50 to 59 weight percent of diopside and 7 to 10 weight percent of akermanite-submellite; and the specific surface area is between 9.7 and 20.5 square meters pre gram, and the maximum absorption capacity is between 3.9 and 8.3 milligrams per gram. The preparation method comprises the following steps: firstly, titanium-bearing blast furnace slag is crushed, and titanium-bearing blast furnace slag powder is obtained; secondly, ammonium sulfate is mixed with the titanium-bearing blast furnace slag powder; thirdly, mixture of the titanium-bearing blast furnace slag powder and the ammonium sulfate is grinded; and fourthly, the mixture is roasted for 1 to 4 hours at a temperature of between 300 and 700 DEG C, and is cooled to the room temperature. The STBBFS catalyst prepared by the method has strong photoabsorption and photoresponse when excited by visible light, so that the photocatalyst which is prepared by adoption of the titanium-bearing blast furnace slag as a raw material can utilize visible light sources such as sunlight to effectively photodegrade organic pollutant and inorganic pollutant in the water, and has high energy conversion efficiency.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a modified titanium-containing blast furnace slag catalyst with visible light catalytic activity and a preparation method. Background technique [0002] With the development of the world economy, energy and environmental problems have become increasingly serious, so the application of semiconductor photocatalytic degradation technology in environmental protection has been widely valued. At present, the most researched semiconductor photocatalytic materials are TiO 2 , ZnO, CdS, WO 3 , Fe 2 o 3 , PBs, SnO 2 、In 2 o 3 , ZnS, SrTiO 3 , SiO 2 Wait for more than a dozen. These semiconductor oxides all have certain photocatalytic activity, but most of them are prone to chemical or photochemical corrosion. Among them, TiO 2 It has good chemical stability, non-toxicity, no secondary pollution, and high catalytic activity. It is a good photocatalytic material, but pu...

AI Technical Summary

Problems solved by technology

When my country's iron and steel enterprises develop and utilize iron resources in large quantities, they extract iron from ilmenite, but do not make full use of other elements in the ore, which not only forms a large amount of titanium-containing blast furnace slag, pollutes the environment, but also wastes titanium in the slag resource

As we all know, the energy of ultraviolet radiation in sunlight is low, accounting for only about 4% of the total solar radiation. If semiconductor photocatalysts excited by ultraviolet light are used to degrade inorganic pollutants and their complex systems, the investment in degradation equipment and the cost of degradation operation will be high. very high

Images