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Method for regulating appearance of nano material for synthesizing sulfide

A technology of nanomaterials and sulfides, which is applied in the field of preparation of sulfide nanomaterials, can solve problems such as difficulty in maintaining the stoichiometric ratio of products, difficulty in achieving controlled synthesis, and complex synthesis of precursors, so as to achieve convenient and simple product processing and save production The effect of easy control of cost and conditions

Inactive Publication Date: 2006-11-22
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For example: At present, people have prepared cadmium sulfide nanomaterials with various shapes and structures by various methods, such as cadmium sulfide nanocrystals, nanospheres, nanorods, nanowhiskers, nanoonions, nanowires, nanobelts, nano However, these studies not only have some shortcomings in the method, for example, high temperature is required in the high-temperature gas phase / solid phase reaction, and the sulfur vapor generated during the preparation process makes it difficult for the product to maintain its stoichiometric ratio; in the gas-liquid phase precipitation reaction, strong Toxic hydrogen sulfide gas; in the molecular precursor method, facing the threat of metal-organic toxicity, the synthesis of precursors is very complicated, etc., the more important thing is that the morphology of the obtained product has a certain degree of randomness, It is difficult to achieve controlled synthesis, which affects industrialization

Method used

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  • Method for regulating appearance of nano material for synthesizing sulfide
  • Method for regulating appearance of nano material for synthesizing sulfide
  • Method for regulating appearance of nano material for synthesizing sulfide

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Step 1: Milking

[0035] Add 28ml of cyclohexane, 3ml of Tween-80, 1ml of 0.1mol / L Na 2 S·9H 2 O (or CdCl 2 2.5H 2 (0) aqueous solution), 1ml of n-pentanol, vigorously stirred at a speed of 3000rpm for 15min to prepare a mixture containing Cd 2+ (or S 2- ) of reverse micelles.

[0036] Step 2: Synthesis

[0037] respectively will contain Cd 2+ (or S 2- ) mixed with equal volumes of reversed-phase micelles, a pale yellow product was formed immediately, stirred slightly for 5 minutes, and left for 12 hours to obtain CdS nanospheres.

[0038] Step 3: Demulsification

[0039] Pour off the supernatant to be recovered; transfer the lower solution into a centrifuge tube, and centrifuge at 2000rpm for 10 minutes; wash with acetone, water and ethanol for 2 to 3 times respectively to remove the surfactant and oil phase, and the The product is soaked in absolute ethanol, and the resulting pale yellow precipitate which is insoluble in water and absolute ethanol is the final...

Embodiment 2

[0044] Step 1: Milking

[0045] Add 1ml of 0.1mol / L Na to the container 2 S·9H 2 O (or CdCl 2 2.5H 2 (O) aqueous solution), 1.2g Pingpingjia, 28ml of cyclohexane, 1ml of n-pentanol, vigorously stirred at a speed of 3000rpm for 15min to obtain a Cd-containing 2+ (or S 2- ) of reverse micelles.

[0046] Step 2: Synthesis

[0047] respectively will contain Cd 2+ (or S 2- ) mixed with equal volumes of reversed-phase micelles, a pale yellow product was formed immediately, stirred slightly for 5 minutes, and left for 12 hours to obtain the CdS nanoshuttle.

[0048] Following steps are with embodiment 1.

[0049] The morphology and structure of the obtained product were characterized by TEM and XRD. The result is as figure 2 (b) and image 3 As shown in (b), it shows that the product is a cadmium sulfide nanoshuttle, and the product is uniformly distributed, not easy to agglomerate, and has high purity, all of which are in the cubic crystal form.

Embodiment 3

[0051] Step 1: Milking

[0052] Add 28ml of cyclohexane, 3ml of C 12 E. 9 or Triton X-100), 1ml of 0.1mol / L Na 2 S·9H 2 O (or CdCl 2 2.5H 2 (0) aqueous solution), 1ml of n-pentanol, vigorously stirred at a speed of 3000rpm for 15min to prepare a mixture containing Cd 2+ (or S 2- ) of reverse micelles.

[0053] Step 2: Synthesis

[0054] respectively will contain Cd 2+ (or S 2- ) mixed with equal volumes of reversed-phase micelles, a pale yellow product was formed immediately, stirred slightly for 5 minutes, and left for 12 hours to obtain CdS nanowires.

[0055] Following steps are with embodiment 1.

[0056] The morphology and structure of the obtained product were characterized by TEM and XRD. The result is as figure 2 (c) and image 3 As shown in (c), it shows that the product is a cadmium sulfide nanowire, and the product is uniformly distributed, not easy to agglomerate, and has high purity, all of which are in the cubic crystal form.

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Abstract

The aim of this invention is to provide a method for regulated synthesize sulfide nano material of various shapes. Wherein: in the quarternary reversed-phase micellar system composed of water(solution) / surfactant / cyclohexane / amyl alcohol, colloidal group(the surfactant with different kinds and structures can provide the reactions with different chemical soft templates, to form micellar systems with different shapes such as spherical, rodlike, tubular, hexagonal, cubic and sheet-like shapes, so as to control the structure and shape of the products. This method can be conducted at room temperature, with simple operation, easy controlling and low environmental pollution, and is specially adapted for large scale industrial application.

Description

technical field [0001] The invention relates to a preparation method of a sulfide nano material, in particular to a method for regulating and controlling the morphology of a synthesized sulfide nano material. Background technique [0002] Sulfide nanomaterials, usually as important semiconductor materials, are widely used in many fields such as light-emitting diodes, fluorescent probes, sensors, solar cells, photoelectric catalysis and other optoelectronic components, and it is predicted that in the future, photocatalytic and electrocatalytic And biology, communication and other aspects have great potential for development. However, the performance of sulfide nanomaterials is often affected by factors such as morphology and structure. Therefore, the control of the size and shape of the synthesized nanomaterials has become a key factor in whether the materials can be applied in the fields of catalysis, medicine, electronics, ceramics, dyes and cosmetics. Assembling and synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/12C01B17/20
Inventor 杨小红吴庆生丁亚平
Owner TONGJI UNIV