Preparation method of fiber membrane loaded with noble metal catalyst

Abstract

The invention discloses a preparation method of a fiber membrane loaded with a noble metal catalyst. Palladium acetate is added into acetone and stirred uniformly, and then ethyl cellulose is added toform a palladium-acetone solution; dimethyldichlorosilane is added into toluene and stirred uniformly at the low temperature to obtain a silane dissolved solution, the palladium-acetone solution is slowly added into the silane dissolved solution at the constant temperature and stirred until the acetone is removed, and a first mixed solution is obtained; distilled water is slowly added into the first mixed solution and stirred to obtain a viscous solution; the viscous solution is added into a spinning device for high-temperature electrospinning to obtain a fiber membrane; the fiber membrane isplaced in an illumination reaction kettle for ultraviolet irradiation for 2-4 hours to obtain a porous fiber membrane, and the porous noble metal catalyst membrane is obtained after winding and extrusion. By utilizing the large surface characteristic of the fiber membrane and a spatial three-dimensional structure of methyl silicone resin, the surface area of the fiber membrane is increased, and meanwhile the adhesion fixation property of the fiber membrane is improved, so that the problem of difficult recovery of nanoscale noble metal catalysts is solved.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method of a fiber membrane loaded with a noble metal catalyst. Background technique [0002] Nanoscience and technology have achieved significant development in recent years. The precise control and synthesis of nanomaterials has also enabled us to take greater initiative in the process of preparing materials, and can initially realize the controllable synthesis of the microstructure of nanomaterials. The "design" of materials, catalyst materials can only maximize their catalytic effect when the size is small enough, and its size is correspondingly in the nanometer scale. Controlling the size of noble metal particles can not only effectively improve the efficiency of the catalyst, but also reduce the consumption of the catalyst as much as possible, which is in line with the trend of green chemical industry. [0003] With the development of nanocatalyst preparat...

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Problems solved by technology

However, the polyol method needs to reflux and reduce noble metals at high temperature, which not only consumes high energy, but also causes uneven particles and a large number of aggregates, so that the average particle size is above 20nm, and the obtained nano-metal catalyst has low activity and low raw material utilization rate. ; Modified reducing agent method needs to add surfactant, and surfactant is easy to adsorb on the surface of precious metal, difficult to remove, covering surface active sites, affecting catalytic activity

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