Method used for controllable synthesis of hierarchical pore metal oxide catalyst with bacterial cellulose

Abstract

The invention relates to a method used for controllable synthesis of a hierarchical pore metal oxide catalyst with bacterial cellulose, and belongs to the field of catalyst preparation. According to the method, sol-gel method is adopted, a bacterial cellulose pore forming agent is added into a mixed metal salt solution, oxide aperture distribution can be regulated and controlled to prepare the hierarchical pore metal oxide catalyst through simple changing of the adding ratio of bacterial cellulose and sugar content. The biological pore forming agent is adopted to prepare the hierarchical poremetal oxide catalyst, the synthesis technology is simple, the steps are simple and clear, a hierarchical pore structure can be formed through direct roasting without modification, and the aperture isadjustable, it is beneficial for mass transfer diffusion of reactants and products, and relatively large specific surface area is achieved. The aperture distribution of the hierarchical pore oxide canbe regulated and controlled through simple changing of the adding ratio of bacterial cellulose and sugar content, compared with regulation of the aperture distribution of the hierarchical pore oxidewith a plurality of template agents (microporous, mesoporous, and macroporous template agents) at the same time in the prior art, the advantages are that: the synthesis method is simple and convenient, the raw materials are widely available, the cost is low, the energy consumption is low, and large scale production can be realized.

Description

technical field [0001] The invention relates to a method for controllably synthesizing a hierarchical porous metal oxide catalyst from bacterial cellulose, which belongs to the field of catalyst preparation. Background technique [0002] In the process of heterogeneous catalytic reaction, the activity of the catalyst is closely related to its internal pore structure. As metal oxides are effective catalysts for heterogeneous catalytic reactions, the design of the pore structure in the preparation process has always been the focus of research and development of this type of catalysts. [0003] The pore structure of metal oxide catalysts is not limited by the structure of the support itself, but the preparation method greatly affects the structure and activity of metal oxide catalysts. The pore sizes of metal oxide catalysts can be divided into three categories: micropores, mesoporous pores and macropores. The pore system of microporous materials contributes to the formation ...

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Problems solved by technology

However, the preparation method of a hierarchically porous catalyst that uses bacterial cellulose directly as a pore-forming agent without modification and regulates the pore structure by changing the composition of bacterial cellulose has not been reported.

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