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Noble metal/zinc oxide compound nano-hollow sphere and preparation method thereof

A technology of zinc oxide and precious metals, applied in the direction of coating, etc., can solve the problems of energy consumption and time-consuming products, environmental pollution, large size of zinc oxide hollow spheres, etc., and achieve the effect of uniform size and uniform dispersion

Inactive Publication Date: 2009-09-16
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation method has disadvantages. First, the size of the prepared zinc oxide hollow spheres is too large, so that its specific surface area is not large enough, and it is still difficult to overcome the defects that exist when it is combined with noble metals; secondly, the preparation method is complicated. , the acid and ammonia water used to process zinc powder pollute the environment, and the product must be calcined at high temperature, which consumes energy and time

Method used

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Embodiment 1

[0018] Embodiment 1: complete preparation successively according to the following steps: the first step, earlier sodium lauryl sulfate is mixed with water, obtains concentration and is the sodium lauryl sulfate solution of 0.01M, then zinc flakes are placed under stirring In sodium lauryl sulfate solution; Wherein, water is deionized water, and the purity of zinc sheet is 99.9%. The second step is to irradiate the zinc sheet with a laser with a wavelength of 1064nm, a power of 100mJ / pulse, a frequency of 5Hz, and a pulse width of 15ns for 50min to obtain a zinc / zinc oxide colloid; wherein, the diameter of the laser spot is 2.5mm, and the emission wavelength is The laser of 1064nm laser is Nd:YAG solid-state laser. The 3rd step, in the zinc / zinc oxide colloid under stirring earlier, dropwise concentration is the noble metal acid solution of 1mM to obtain product, wherein, the volume ratio of zinc / zinc oxide colloid and noble metal acid solution is 20:1.2, noble metal acid solutio...

Embodiment 2

[0019] Embodiment 2: complete preparation successively according to the following steps: the first step, earlier sodium lauryl sulfate is mixed with water, obtains concentration and is the sodium lauryl sulfate solution of 0.03M, then zinc sheet is placed under stirring Sodium lauryl sulfate solution; wherein, the water is distilled water, and the purity of the zinc flakes is 99.99%. The second step is to irradiate the zinc sheet with a laser with a wavelength of 1064nm, a power of 80mJ / pulse, a frequency of 8Hz, and a pulse width of 13ns for 55min to obtain zinc / zinc oxide colloid; wherein, the diameter of the laser spot is 2.3mm, and the emission wavelength is The laser of 1064nm laser is Nd:YAG solid-state laser. The 3rd step, in the zinc / zinc oxide colloid under stirring earlier, dropwise concentration is the noble metal acid solution of 2mM to obtain product, wherein, the volume ratio of zinc / zinc oxide colloid and noble metal acid solution is 20:1.1, noble metal acid sol...

Embodiment 3

[0020] Embodiment 3: complete preparation successively according to the following steps: the first step, earlier sodium lauryl sulfate is mixed with water, obtains concentration and is the sodium lauryl sulfate solution of 0.05M, then zinc flakes are placed under stirring In sodium lauryl sulfate solution; Wherein, water is deionized water, and the purity of zinc sheet is 99.9%. The second step is to irradiate the zinc sheet with a laser with a wavelength of 1064nm, a power of 70mJ / pulse, a frequency of 10Hz, and a pulse width of 10ns for 60 minutes to obtain a zinc / zinc oxide colloid; wherein, the diameter of the laser spot is 2mm, and the emission wavelength is 1064nm The laser of the laser is a Nd:YAG solid-state laser. The 3rd step, in the zinc / zinc oxide colloid under stirring earlier, dropwise concentration is the noble metal acid solution of 3mM to obtain product, wherein, the volume ratio of zinc / zinc oxide colloid and noble metal acid solution is 20:1, and noble metal...

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Abstract

The invention discloses a noble metal / zinc oxide compound nano-hollow sphere and a preparation method thereof. The diameter of the hollow sphere is 10 to 35nm, the thickness of a spherical shell is 1 to 6nm and noble metal particles with the particle size of 1 to 3nm are embedded on the inner wall of the sphere; the preparation method comprises the following steps of: firstly, mixing sodium dodecyl sulfate and water to obtain sodium dodecyl sulfate solution with the concentration of 0.01 to 0.1 M, and then arranging a zinc plate into the sodium dodecyl sulfate solution under stirring; secondly, using laser with the wavelength of 1064nm, the power of 35 to 100mJ / pulse, the frequency of 5 to 15Hz and the pulse width of 5 to 15ns to irradiate the zinc plate for 50 to 70min to obtain zinc / zinc oxide colloid; and thirdly, dripping noble metal acid solution with the concentration of 1 to 5mM in the zinc / zinc oxide colloid under stirring to obtain products, then carrying out washing and drying to the products and preparing the noble metal / zinc oxide compound nano-hollow sphere. The noble metal / zinc oxide compound nano-hollow sphere can greatly improve the performance and application in the aspects of pharmaceutical capsules, sensors, batteries, optical devices, catalysts, biology and the like.

Description

technical field [0001] The invention relates to a composite hollow sphere and a preparation method thereof, in particular to a noble metal / zinc oxide composite nano hollow sphere and a preparation method thereof. Background technique [0002] In general, combining noble metals with semiconductors can improve many properties of the material, such as promoting photogenerated electron-hole separation, thereby improving its photocatalytic performance. However, the existing noble metal and semiconductor composite materials have insurmountable defects, such as the large size of the semiconductor matrix material and its solid structure so that the specific surface area is not large enough, the large size of the noble metal makes the activity not high enough, and the noble metal is not very active. Good dispersion into semiconductors and good contact with them lead to insufficient coupling effect, which greatly inhibits the improvement and application of composite materials. [000...

Claims

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Application Information

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IPC IPC(8): B22F1/02
Inventor 曾海波刘培生蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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