Method of synthesizing zinc oxide/cadmium sulfide heterojunction nanorod array by virtue of two-step ion exchange in liquid phase

A nanorod array and ion exchange technology, applied in the field of nanomaterials, can solve the problems of uneven coating, poor contact and complexity of the core-shell layer, and achieve the effect of simple operation method, uniform size and good contact

Inactive Publication Date: 2014-02-26
TIANJIN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of relatively complicated methods for synthesizing ZnO/CdS heterojunction nanostructures, poor core-shell conta

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  • Method of synthesizing zinc oxide/cadmium sulfide heterojunction nanorod array by virtue of two-step ion exchange in liquid phase
  • Method of synthesizing zinc oxide/cadmium sulfide heterojunction nanorod array by virtue of two-step ion exchange in liquid phase
  • Method of synthesizing zinc oxide/cadmium sulfide heterojunction nanorod array by virtue of two-step ion exchange in liquid phase

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Embodiment Construction

[0014] The raw materials used in the present invention are analytically pure reagents, and the specific examples are as follows.

[0015] (1) Using ZnO nanorod arrays as raw materials, add them to 30mL of 0.5M thioacetamide (TAA) aqueous solution, use the reactor as the reaction vessel, keep at 90°C for 2h, take it out and wash it, and get the white substance ZnO / ZnS heterogeneous Junction nanorod arrays;

[0016] (2) Add the white ZnO / ZnS heterojunction nanorod array to 30 mL of 0.1M cadmium chloride (CdCl 2 ) aqueous solution, using the reactor as the reaction vessel, kept at 120°C for 9 hours, took it out and washed it, and obtained the yellow substance ZnO / CdS heterojunction nanorod array.

[0017] The thickness of the CdS layer of the prepared ZnO / CdS heterojunction nanorod array is 40-60nm.

[0018] figure 1 , 3 They are the SEM and TEM images of ZnO / CdS heterojunction nanorods, respectively. It can be seen from the figure that a large number of nanorods with uniform...

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Abstract

The invention discloses a method of synthesizing a zinc oxide/cadmium sulfide heterojunction nanorod array by virtue of two-step ion exchange in a liquid phase. The method comprises the following steps: (1) adding a ZnO nanorod array used as a raw material into 30mL of 0.5M thioacetamide (TAA) aqueous liquor, maintaining for 2 hours at 90 DEG C in a reaction kettle, and cleaning the ZnO nanorod array to obtain a ZnO/ZnS heterojunction nanorod array; (2) adding the ZnO/ZnS heterojunction nanorod array into 30mL of 0.1M cadmium chloride (CdCl2) aqueous liquor, maintaining for 9 hours at 120 DEG C in the reaction kettle, and then cleaning the ZnO/ZnS heterojunction nanorod array to obtain the ZnO/CdS heterojunction nanorod array. The ZnO/CdS heterojunction nanorod array provided by the invention is uniform in size, and the method is simple to operate and mild in condition and is a novel method capable of massively synthesizing the ZnO/ZnS heterojunction nanorod array with simplicity and convenience in operation.

Description

technical field [0001] The invention relates to a nanometer material, in particular to a method for synthesizing a heterojunction nanorod array structure by mild two-step liquid-phase ion exchange. Background technique [0002] CdS is a common n-type semiconductor with a band gap of about 2.6 eV and a good light absorption coefficient. Therefore, the nanostructure of CdS is widely used in solar energy conversion, photocatalysis and other fields. CdS is often used as a narrow bandgap semiconductor and wide bandgap semiconductor ZnO to form a type II heterojunction nanostructure, which has excellent performance in electron separation and transport, so it has a wide range of applications in the fields of solar cells and photocatalysis. Therefore, the ZnO / CdS heterojunction nanostructure has a good application prospect. However, the reported methods for synthesizing CdS nanostructures on ZnO nanowires are relatively complicated. For example, if the CdS layer is synthesized by e...

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Application Information

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IPC IPC(8): B01J13/02C01G11/02C01G9/02B82Y40/00B82Y30/00
Inventor 杜希文王琰
Owner TIANJIN UNIV
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