A kind of preparation method and application of titanium-based nanosheet composite catalyst

Abstract

The invention relates to a preparation method and application of a titanium-based nano-sheet composite catalyst. The preparation method comprises the following steps: taking tetrabutyl titanate as a titanium source and regulating and controlling hydrothermal synthesis conditions to prepare a TiO2 nano-sheet carrier capable of preferentially exposing a (001) crystal surface; loading manganese and cerium metal oxide active components to prepare the titanium-based nano-sheet composite catalyst. According to the catalyst prepared by the invention, the (001) crystal surface, which is preferentiallyexposed, of a TiO2 nano-sheet, and the manganese and cerium metal oxide active components have a strong mutual effect, and efficient catalytic oxidation on chlorinated aromatic hydrocarbon can be realized.

Description

technical field The invention relates to a preparation method and application of a titanium-based nanosheet composite catalyst. Background technique Some secondary pollutants will be produced in the process of waste incineration. Among them, chlorinated aromatic hydrocarbons with high toxicity, persistence and bioaccumulation, such as dioxins, polychlorinated biphenyls, and hexachlorobenzene, have become widely concerned. focus. At present, the research on the reduction technology and control principle of chlorinated aromatic hydrocarbons in waste incineration tail gas has become one of the hotspots in the field of environmental chemistry. The technologies for controlling chlorinated aromatics pollutants in incineration tail gas are mainly adsorption method and catalytic oxidation method. The traditional adsorption method only transfers and enriches the pollutants from the gas phase to the solid phase. The physical and chemical properties of the pollutants have not change...

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Problems solved by technology

Recent studies have shown that the morphology and structure of the catalyst support have an important influence on the reactivity of the catalyst, but so far, the research on the preparation method of the catalyst involved in the degradation of chlorinated aromatics is limited to the chemical composition and crystal structure of the support. The effect of phase structure on catalyst activity, there is no research report on the research and development of composite nanocatalysts for the efficient degradation of chlorinated aromatic hydrocarbons based on the design of catalyst carrier morphology

In recent years, the catalytic activity of manganese and cerium metal oxides has been studied, but no TiO 2 A report on the development of a new catalyst for the degradation of chlorinated aromatic hydrocarbons by assembling the active components of manganese and cerium metal oxides on the carrier

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