A method for preparing a novel W doped slag based binding material with different CeO2 loads

Abstract

A method for preparing a novel W doped slag based binding material with different CeO2 loads is disclosed. Slag, as a raw material, sodium hydroxide as an activator and silica fume as a toughening agent are utilized to prepare an alkali activated slag based binding material; the prepared binding material as a carrier is utilized to synthesize a W-doped alkali activated slag based binding materialcatalyst loaded with CeO2 through an incipient wetness impregnation process, with the mechanical performance being adopted as an evaluation index. On the one hand, a novel route of high-added-value utilization of industrial solid waste is provided, and on the other hand, the prepared catalyst can be used for photocatalytic oxidation degradation of dye wastewater, and can also be used for photocatalytic reduction and decomposition of water to prepare hydrogen, thus providing a novel idea for basic research of application of solid waste based binding materials of this type. The method is of great significance for sustained development of the steel industry, wastewater treatment in the dyeing and printing industry and the field of new energy and will generate important resource, economic, environment and social benefits.

Description

technical field [0001] The invention relates to the field of high value-added utilization of solid waste resources and the preparation of new catalysts, in particular to a W-doped CeO 2 Preparation methods of new steel slag-based cementitious materials with different loads. Background technique [0002] Steel slag is the main solid waste produced by the iron and steel industry, and the output rate is about 15-20% of the crude steel output. With the rapid development of the national economy, the discharge of steel slag has also increased sharply. According to statistics, in 2016, the discharge of steel slag in my country was about 121 million tons. These steel slags have been piled up as waste for a long time, which not only occupies a large amount of land resources, but also causes serious pollution to the ecological environment. Therefore, it is imminent to improve the resource utilization of this kind of solid waste, and explore new ways of large-scale application of stee...

AI Technical Summary

Problems solved by technology

Although this kind of catalytic oxidation technology using semiconductors as catalysts has many advantages over other oxidation technologies, there are still several key technical problems in this kind of research, which greatly restricts its industrial application.

These problems include: low quantum yield (about 4%); low utilization rate of solar energy; loading technology of photocatalyst; dispersion problem of photocatalyst powder; high cost of photocatalyst preparation

At present, the preparation of highly active photocatalysts requires the doping of metal elements or semiconductors into the photocatalyst, but no matter from the catalytic photocatalytic activity, or the cost of raw materials, the complexity of the process of preparing photocatalysts It is difficult to apply to industrial production

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