A kind of preparation method of core-shell structure zns/ni2p composite microsphere

A core-shell structure and composite technology, which is applied in the field of photocatalysis to achieve the effects of simple and easy-to-obtain raw materials, superior photocatalytic performance, and easy-to-control conditions.

Inactive Publication Date: 2016-04-20
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

[0003] However, with the deepening of research, it is found that the application of single-component nanomaterials in many fields is limited to a certain extent due to their single function, and the compounding of two or more semiconductor materials at the nanoscale may be possible. Some new properties are produced, new functions are added, and the preparation and performance research of nanocomposite materials become a hot spot in the scientific research of nanomaterials.

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  • A kind of preparation method of core-shell structure zns/ni2p composite microsphere
  • A kind of preparation method of core-shell structure zns/ni2p composite microsphere
  • A kind of preparation method of core-shell structure zns/ni2p composite microsphere

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Embodiment 1

[0026] A core-shell structure of ZnS / Ni 2 The preparation method of P complex microspheres comprises the following steps:

[0027] 1) Preparation of zinc sulfide microspheres: 1 mmol Zn(CH 3 COO) 2 ·2H 2 O was dissolved in 15 mL of distilled water. Under magnetic stirring, 0.45 mL of glacial acetic acid was added. After magnetic stirring for a while, 1.5 mmol of thiourea was added to the system. In the reaction kettle of polytetrafluoroethylene, the reaction was carried out at 170 °C in a constant temperature oven for 8 hours. After the reaction was completed, it was cooled naturally, centrifuged, and the samples were washed with distilled water and absolute ethanol, respectively, at 60 °C in a vacuum drying box Dry for 6h to get white powder, refer to image 3 , the white powder was characterized by X-ray diffractometer and scanning electron microscope, and the obtained product was zinc sulfide with microsphere structure;

[0028] 2) Preparation of ZnS / Ni 2 P composite ...

Embodiment 2

[0031] Using the zinc sulfide powder prepared in step 1) in Example 1 as the raw material, in step 2), no sodium dodecyl sulfate (SDS) was added, and other conditions remained unchanged. Through characterization analysis, the obtained product contained a small amount of impurities , and its morphology is comparable to that of ZnS / Ni in Example 1 2 P composite microspheres are more messy.

Embodiment 3

[0033] Using the zinc sulfide powder prepared in step 1) in Example 1 as a raw material, in step 2), the amount of citric acid was changed to 0.15 mmol, and other conditions remained unchanged. Through characterization analysis, the obtained product is ZnS / Ni 2P composite microspheres. Using pyrrole red B solution as the photocatalytic degradation dye, the degradation rate reached 76% after 90 min of illumination.

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Abstract

The invention provides a preparation method of a ZnS / Ni2P composite micro-sphere with a core-shell structure. The preparation method comprises the following steps: firstly, preparing zinc sulfide powder; secondly, by taking the zinc sulfide powder, a soluble nickel salt and yellow phosphorus as main raw materials, slowing down a releasing speed of nickel ions by a chelation effect of citric acid on the nickel ions; and synthesizing the ZnS / Ni2P composite microsphere with the core-shell structure under the effect of a surfactant sodium dodecyl sulfate (SDS) at a low temperature under a hydrothermal condition. The preparation method is simple and feasible; and conditions are easy to control, the repeatability is good and post-period heat treatment is not needed. When the ZnS / Ni2P composite micro-sphere is subjected to a photocatalytic performance test, the photocatalytic performance is better than that of single zinc sulfide, so that the ZnS / Ni2P composite micro-sphere has a certain application potential in the aspect of photocatalytically degrading dyestuff wastewater.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a core-shell structure ZnS / Ni 2 Preparation method of P complex microspheres. Background technique [0002] Semiconductor nano / micro materials have quantum size effect, surface effect and macroscopic quantum tunneling effect, showing many excellent properties, and have broad application prospects in luminescent materials, nonlinear optical materials, photosensor materials and photocatalytic materials. As an important wide-bandgap II-VI compound semiconductor material, ZnS has a band gap of 3.66 eV at room temperature. Due to its good fluorescence effect and electroluminescence function, it exhibits potential applications in electroluminescent devices, light emitting diodes (LEDs), solar cells, sensors, flat panel displays, and many other aspects. Moreover, due to the high energy conversion efficiency of ZnS, it can be used as an efficient photocatalyst to degrade organic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185C02F1/32C02F101/38
CPCY02W10/37
Inventor 刘淑玲王正奇仝建波杜经武
Owner SHAANXI UNIV OF SCI & TECH
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