Method for synthesizing zinc, cadmium and sulfur solid solution material by two-step process

Abstract

The invention discloses a method for synthesizing zinc, cadmium and sulfur solid solution material by a two-step process. The method comprises the following steps of weighing zinc acetate dihydrate and cadmium acetate dihydrate, adding into a mixed solution of DETA and deionized water, stirring to form a mixed solution A; weighing thioacetamide as a sulfur source, adding into the mixed solution A,then stirring and performing ultrasonic treatment in sequence to form a mixed solution B; adding the mixed solution B into a polytetrafluoroethylene lining for hydrothermal reaction; after the completion of the reaction, centrifugally washing the product with deionized water and ethanol respectively for several times, and then drying and grinding to obtain a precursor; subjecting the precursor toa sintering reaction, stopping immediately after the completion of the reaction, and introducing argon gas for protection; when the temperature drops to the room temperature, taking out a sample, andgrinding the sample into powder, namely the zinc, cadmium and sulfur solid solution solid material.

Description

technical field [0001] The present invention relates to Zn 1-x Cd x The preparation method of S material, be specifically related to a kind of two-step synthesis zinc cadmium sulfur solid solution (Zn 0.5 Cd 0.5 S) Method of material. Background technique [0002] Zn 1－x Cd x As a kind of semiconductor photocatalyst with direct wide band gap, S solid solution gradually reduces its band gap from 3.6eV to 2.3eV with the increase of Cd usage. A certain amount of visible light and a part of near ultraviolet light are used in sunlight. Moreover, it has the advantages of cheap and easy to obtain, strong chemical stability and light corrosion resistance, and has attracted widespread attention since it came out. Zn 1－x Cd x S has potential applications in many fields, and is often used in photoluminescent photoconductor devices, photocatalytic degradation of organic matter and photolysis of water to produce hydrogen, phosphors, and other optoelectronic fields. [0003] Zn ...

AI Technical Summary

Problems solved by technology

[0005] Currently, Zn 0.5 Cd 0.5 The synthesis methods of S(x=0.5) materials mainly include: co-precipitation method (Xing C, Zhang Y, Yan W, et al.Band structure-controlled solid olution of d1-xZnxS photocatalyst for hydrogen production by water splitting[J].Int .J.Hydrogen Energ.,2006,31(14):2018-2024), microemulsion method (Chen D, Gao L.Microemulsion-mediated synthesis of cadmium zinc sulfide nanocrystals with composition-modulated optical properties[J].Solid State Commun. ,2005,133(3):145-150.), hydrothermal method (Nie Q, Yuan Q, Wang Q, et al.In situ synthesis of Zn x Cd 1-x S nanorod by a hydrothermal route[J].J.Mater.Sci.,2004,39(16-17):5611-5612.), thermal decomposition method (Yu J, Yang B, ChengB.Noble-metal-free carbon nanotube-Cd 0.1 Zn 0.9 S composites for high visible-light photocatalytic H 2 -production performance[J].Nanoscale,2012,4(8):2670-2677.) Among them, the co-precipitation method has fast reaction speed, simple process and easy operation, and excellent product quality, but has higher requirements for temperature and higher energy consumption. Large, and the product is prone to sintering or melting, and the reaction is not easy to control

The liquid-phase method has mild reaction conditions, the process does not require large-scale equipment, and the cost is low, but the liquid-phase method is easy to introduce trace impurities and product agglomeration

The microemulsion process is relatively simple in operation, simple in equipment, convenient in operation, and uniform in particles, but a large amount of organic matter will be produced, which will have a certain impact on the environment, cause environmental pollution, and the reaction rate is difficult to control. processing, which increases the cost of the reaction

The thermal decomposition method is easy to operate and has a fast reaction rate, but it is easy to cause product agglomeration, the temperature required for the reaction is high, and the energy and cost required for production are relatively high.

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