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Water-phase method for preparing surface modified functional cadmium sulfide ultrafine particles

A technology of surface modification and cadmium sulfide, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems that nano-scale powders are not easy, and achieve the effects of efficient preparation, easy operation of reaction, and simple process flow

Inactive Publication Date: 2013-07-03
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many ways to synthesize nanomaterials, but it is not easy to obtain nanoscale powders with little or no agglomeration

Method used

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  • Water-phase method for preparing surface modified functional cadmium sulfide ultrafine particles

Examples

Experimental program
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Effect test

Embodiment example 1

[0025] 1.1mmol / L 100mL cadmium nitrate solution, under the condition of constant stirring, add 100mL mercaptoacetic acid with a concentration of 1mmol / L dropwise. After the addition, adjust the pH to 11 with NaOH solution. After the pH value of the solution is stable, pass nitrogen to remove oxygen. , and then add 1.2mmol / L 100mL sodium sulfide solution dropwise, heat and control the temperature at 90°C, continue to stir thoroughly for 30min, and immediately carry out solid-liquid separation after the reaction, to obtain surface-modified functional cadmium sulfide ultrafine particles CdS / -SCH 2 COOH, its UV-Vis absorption spectrum analysis such as figure 1 Shown in line 1.

Embodiment example 2

[0027] 1.1mmol / L 100mL cadmium nitrate solution, under the condition of constant stirring, add 100mL mercaptoacetic acid with a concentration of 2mmol / L dropwise. After the addition, adjust the pH to 11 with NaOH solution. After the pH value of the solution is stable, pass nitrogen to remove oxygen. Finally, add 1.2mmol / L 100mL sodium sulfide solution dropwise, then heat and control the temperature at 90°C, continue to stir thoroughly for 30min, and immediately carry out solid-liquid separation to obtain CdS / -SCH 2 COOH sample, its UV-Vis absorption spectrum analysis such as figure 1 Shown in line 2.

Embodiment example 3

[0029] 1mmol / L 100mL cadmium nitrate solution was added dropwise to 100mL thioglycolic acid with a concentration of 3mmol / L under constant stirring. After the addition was completed, the pH was adjusted to 11 with NaOH solution. Then add 1.2mmol / L 100mL sodium sulfide solution dropwise, heat and control the temperature at 90°C, continue stirring for 30min, and immediately carry out solid-liquid separation to obtain the final CdS / -SCH 2 COOH sample, its UV-Vis absorption spectrum analysis such as figure 1 Shown in line 3.

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Abstract

The invention discloses a water-phase method for preparing surface modified functional cadmium sulfide ultrafine particles, which belongs to the technical field of cadmium sulfide preparation method. According to the method, cadmium nitrate and sodium sulfide are adopted as raw materials, and mercaptoacetic acid is adopted as a modifying agent. An experiment method comprises the steps that: a cadmium nitrate solution is continuously stirred, and mercaptoacetic acid is gradually dropped in; when mercaptoacetic acid addition is finished, a reaction is sufficiently carried out for a period of time; the pH value is regulated by using a sodium hydroxide solution, such that the mixture is alkaline; when solution pH value is stable, nitrogen is delivered in for removing oxygen; a sodium sulfide solution is gradually dropped in; the mixture is heated and the temperature is controlled, and the mixture is sufficiently stirred for a period of time, such that a final CdS / -SCH2COOH sample is obtained. According to the water-phase method for preparing surface modified functional cadmium sulfide ultrafine particles, during the preparation process, cadmium sulfide ultrafine particle surface functionalizing can be directly realized. The process flow is simple, and the reaction is easy to operate. The method is a high-efficiency functional cadmium sulfide ultrafine particle preparation method.

Description

technical field [0001] The invention belongs to the technical field of methods for preparing cadmium sulfide from materials, and in particular relates to a method for preparing surface-modified functional cadmium sulfide ultrafine particles by an aqueous phase method. Background technique [0002] Cadmium sulfide is a typical II-VI transition metal compound, which has a wide band gap, a direct transition energy level structure, and a large ionic bond component. The quantum size effect changes the energy level of CdS, widens the energy gap, and shifts the absorption and emission spectra to the short-wave direction. The change of the spectrum has an important impact on its optical and electrical properties, and has a wide range of applications in nonlinear optical materials, biological detection, and luminescent materials. [0003] There are three methods for preparing cadmium sulfide: solid-phase synthesis, gas-phase synthesis, and liquid-phase synthesis. Solid-phase synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56
Inventor 马飞张景怀杨中元张程
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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