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Preparation method of biologic morphologies three dimensional network structure Pd system nano-photocatalyst material

A technology of network structure and biological morphology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult to form multi-level nanocomposite materials, complex process flow, difficult to obtain materials, etc. , to achieve the effect of low preparation cost, simple process and excellent performance

Inactive Publication Date: 2007-08-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preparation process can obtain evenly dispersed metal palladium with regular particle shape, it is difficult to obtain materials with higher purity, and the process is complicated and the cost is high.
Another research result (Yu Jian, Shi Jianlin, etc., Acta Chemie Sinica, 2000; 58:157) reported that using PdCl 2 The solution reacts directly with the newly synthesized ordered mesoporous aluminum silicate powder to load catalytically active Pd / PdO grains on the MCM-41 material. Since the surfactant still exists in the pores during the loading process, the composite grains cannot into the pores, so it is difficult to form a multi-level nanocomposite that is uniformly distributed at the nanoscale

Method used

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  • Preparation method of biologic morphologies three dimensional network structure Pd system nano-photocatalyst material
  • Preparation method of biologic morphologies three dimensional network structure Pd system nano-photocatalyst material
  • Preparation method of biologic morphologies three dimensional network structure Pd system nano-photocatalyst material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Select fresh poultry eggs, remove the liquid content, rinse the eggshells with clean water, soak in 1M hydrochloric acid solution for about 10 minutes to peel off the egg film, rinse thoroughly with clean water and deionized water three times, remove and blow at room temperature Dry in the air; weigh 4g of the above-mentioned clean and dry biological material egg membrane, soak it in the prepared 500ml palladium chloride solution with a concentration of 0.001M for 48 hours, take it out and dry it, put it into the induction cooker at 25°C / min Heat up to 400°C at a heating rate and keep at a constant temperature for 1.5 hours, then stop heating, and take it out after the furnace temperature naturally drops to room temperature. The obtained brown flakes are composed of Pd / PdO.

[0028] Curve 1 in Figure 1 shows the XRD pattern of the three-dimensional network structure nano-Pd / PdO photocatalytic composite material prepared at 400°C. The results show that the diffraction pe...

Embodiment 2

[0031] Select fresh poultry eggs, remove the liquid content, rinse the eggshells with clean water, soak in 1M hydrochloric acid solution for about 10 minutes to peel off the egg film, rinse thoroughly with clean water and deionized water three times, remove and blow at room temperature Dry in the air; weigh 4g of the above-mentioned clean and dry biological material egg membrane, immerse it in the prepared 500ml palladium chloride solution with a concentration of 0.002M for 30 hours, take it out and dry it, put it in an induction cooker at a temperature of 25°C / min. Heat up to 500°C at a heating rate and keep at a constant temperature for 1.5 hours, then stop heating, and take it out after the furnace temperature naturally drops to room temperature. The obtained brown flakes are composed of Pd / PdO.

[0032] Curve 2 in Figure 1 shows the XRD pattern of the three-dimensional network structure nano-Pd / PdO photocatalytic composite material prepared at 500 °C. The results show that t...

Embodiment 3

[0037] Select fresh poultry eggs, remove the liquid content, rinse the eggshells with clean water, soak in 1M hydrochloric acid solution for about 10 minutes to peel off the egg film, rinse thoroughly with clean water and deionized water three times, remove and blow at room temperature Dry in the air; weigh 4g of the above-mentioned clean and dry biological material egg film, dip it in the prepared 500ml palladium chloride solution with a concentration of 0.005M for 30 hours, take it out and dry it, put it into the induction cooker at 25°C / min Heat up to 550°C at a heating rate and keep at a constant temperature for 1.5 hours, then stop heating, and take it out after the furnace temperature naturally drops to room temperature. The composition of the resulting brown flakes is Pd / PdO.

[0038] Curve 3 in Figure 1 shows the XRD pattern of the three-dimensional network structure nano-Pd / PdO photocatalytic composite material prepared at 550°C. The results show that while the inten...

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Abstract

The invention involves a biological shape three-dimensional network structure palladium nano-photocatalytic materials preparation method. It makes use of dipping optimum biological materials self-deacidizing technique and uses the bird eggshell film as biological template materials; it prepares three-dimensional network tubular hierarchy Pd / PdO photocatalytic composite material with excellent performance through dipping optimization in palladium salt solution and combining with roasting dispose, controls the component and construction of prepared composite material through adjusting the dipping optimization process and heat treatment process, the prepared photo-catalytic materials are combined by PdO with full crystallization and metal Pd nanometer particles uniformly, and combines special three-dimensional network intercommunicating tube construction orderly, and the metal nanometer particles loads and inserts on tube inner wall uniformly. The art of the invention method is simple, cost is low and the prepared material has excellent photo-catalytic properties.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a nano Pd / PdO photocatalytic material with a three-dimensional network hierarchical structure in biological form and a preparation method thereof. The nanocomposite material is composed of palladium oxide nanocrystals with a cross-tubular hierarchical structure and metal palladium nanoparticles loaded and embedded on the inner wall of the tube. It has high ultraviolet light decomposition efficiency and photocatalytic stability. Background technique [0002] Metal oxides have unique electrical, optical, magnetic and chemical characteristics, and are widely used in information storage, sensors, catalysis, photovoltaic cells and other technical fields. When the particle size of these metal oxides is on the nanometer scale, many of its properties change substantially, which provides a broad space for the application of new technologies (N.Markus, G.Georg, P....

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J32/00B01J37/02
Inventor 苏慧兰董群张荻
Owner SHANGHAI JIAO TONG UNIV
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