Method for preparing monodisperse cadmium sulfide nanospheres

A technology of nanospheres and cadmium sulfide, applied in cadmium sulfide, nanotechnology, nanotechnology, etc., can solve the problems of low raw material utilization, poor repeatability, and high equipment requirements, and achieve short preparation cycle, high repeatability, and required temperature low effect

Inactive Publication Date: 2013-03-06
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

These methods either require high equipment and are relatively expensive; or the utilization rate of raw materi

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  • Method for preparing monodisperse cadmium sulfide nanospheres
  • Method for preparing monodisperse cadmium sulfide nanospheres

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Embodiment 1

[0022] 1) The analytically pure cadmium acetate dihydrate (C 4 h 6 CdO 4 2H 2 O) added to deionized water, and kept stirring, configured as Cd 2+ A transparent solution A with a concentration of 0.2mol / L;

[0023] 2) The analytically pure thiourea (CH 4 N 2 S) added to deionized water, and kept stirring, configured as S 2- A transparent solution B with a concentration of 0.6mol / L;

[0024] 3) Slowly add an equal volume of solution B to solution A under strong stirring, and then ultrasonically disperse to obtain solution C;

[0025] 4) Prepare PVP solution D with a concentration of 0.1mol / L, and mix solution C and solution D at a volume ratio of 100:3 to obtain solution E;

[0026] 5) Pipette the solution E into a Teflon-lined hydrothermal reaction kettle, and control the filling degree at 40%; seal the hydrothermal kettle and put it into the MDS-6 temperature-pressure dual-control microwave hydrothermal reactor The preparation reaction is carried out in the temperatur...

Embodiment 2

[0031] 1) The analytically pure cadmium acetate dihydrate (C 4 h 6 CdO 4 2H 2 O) added to deionized water, and kept stirring, configured as Cd 2+ A transparent solution A with a concentration of 0.4mol / L;

[0032] 2) The analytically pure thiourea (CH 4 N 2 S) added to deionized water, and kept stirring, configured as S 2- A transparent solution B with a concentration of 0.8mol / L;

[0033] 3) Slowly add an equal volume of solution B to solution A under strong stirring, and then ultrasonically disperse to obtain solution C;

[0034] 4) Prepare PVP solution D with a concentration of 0.2mol / L, and mix solution C and solution D at a volume ratio of 100:5 to obtain solution E;

[0035] 5) Pipette the solution E into a Teflon-lined hydrothermal reaction kettle, and control the filling degree at 60%; seal the hydrothermal kettle and put it into the MDS-6 temperature-pressure dual-control microwave hydrothermal reactor The preparation reaction is carried out in the temperatur...

Embodiment 3

[0038] 1) The analytically pure cadmium acetate dihydrate (C 4 h 6 CdO 4 2H 2 O) added to deionized water, and kept stirring, configured as Cd 2+ A transparent solution A with a concentration of 0.6mol / L;

[0039] 2) The analytically pure thiourea (CH 4 N 2 S) added to deionized water, and kept stirring, configured as S 2- A transparent solution B with a concentration of 0.9mol / L;

[0040] 3) Slowly add an equal volume of solution B to solution A under strong stirring, and then ultrasonically disperse to obtain solution C;

[0041] 4) Prepare PVP solution D with a concentration of 0.3mol / L, mix solution C and solution D at a volume ratio of 100:7 to obtain solution E;

[0042] 5) Pipette the solution E into a Teflon-lined hydrothermal reaction kettle, and control the filling degree at 70%; seal the hydrothermal kettle and put it into the MDS-6 temperature-pressure dual-control microwave hydrothermal reactor The preparation reaction is carried out in the temperature co...

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Abstract

The invention provides a method for preparing monodisperse cadmium sulfide nanospheres, comprising steps of adding cadmium acetate dihydrate and sulfourea into deionized water respectively to obtain a solution A and a solution B, and adding the solution B into the solution A to obtain a solution C; uniformly mixing a PVP (Polyvinyl Pyrrolidone) solution D and the solution C to obtain a solution E; transferring the solution E into a hydrothermal reactor with Teflon as a lining, sealing the hydrothermal reactor, then putting the hydrothermal reactor into a temperature-pressure dual-control microwave hydrothermal reaction instrument for implementation of a preparation reaction in a temperature control mode, and naturally cooling after reaction completion; opening the hydrothermal reactor under the room temperature, washing with ethanol, then washing with the deionized water, performing centrifugal collection by taking absolute ethyl alcohol as a solvent, and drying at the temperature of 60 DEG C to obtain products CdS nanospheres. With the adoption of the method for preparing the monodisperse cadmium sulfide nanospheres, the high-temperature high-pressure environment of a hydrothermal method and the fast heating characteristic of a microwave method are combined; and with the adoption of a preparation technology of a microwave hydrothermal method, the monodisperse cadmium sulfide nanospheres with a regular spherical shape are prepared; and in addition, the method is short in preparation period, low in required temperature, small in pollution, low in energy consumption, simple to operate and high in repeatability, thereby being applicable for mass production.

Description

technical field [0001] The invention relates to a preparation method of cadmium sulfide nanospheres, in particular to a preparation method of monodisperse cadmium sulfide nanospheres. Background technique [0002] Cadmium sulfide (CdS) crystal is a typical II-VI piezoelectric semiconductor material and a semiconductor photosensitive material. Because of its special optical and electrical properties, it has been widely used in various light-emitting devices and photovoltaic devices. , optical detectors and photosensitive sensors and other fields. At present, the methods for preparing nano-cadmium sulfide mainly include physical vapor deposition method, chemical vapor deposition method, microemulsion method, colloid chemical method, hydrothermal method, solvothermal method and so on. These methods either require high equipment and are relatively expensive; or the utilization rate of raw materials is very small; or the process is complicated, the preparation period is long, an...

Claims

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Application Information

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IPC IPC(8): C01G11/02B82Y30/00
Inventor 曹丽云张钦峰黄剑锋吴建鹏费杰卢靖李翠艳
Owner SHAANXI UNIV OF SCI & TECH
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