Preparation method of zinc sulfide cadmium solid solutions with different morphologies

Abstract

The invention discloses a preparation method of zinc sulfide cadmium solid solutions with different morphologies, and belongs to the technical field of photocatalytic materials. The preparation methodcomprises the following steps: step 1, dissolving L-cysteine, Zn (Ac)2.2H2O and Cd (Ac) 2.2H2O in ethylene glycol or a mixed solution of ethylene glycol and deionized water, and vigorously stirring to form suspension; step 2, transferring the suspension into a polytetrafluoroethylene reaction kettle, heating for reaction, cooling to room temperature after the reaction is finished, centrifuging toobtain a precipitate, repeatedly washing the precipitate with deionized water and absolute ethyl alcohol respectively, and drying under vacuum to obtain the zinc sulfide cadmium solid solutions withdifferent morphologies. The preparation method is simple, the preparation period is short, and the technological process is easy to control. The Zn0.5Cd0.5S solid solution material prepared by the method has extremely high photocatalytic hydrogen production performance.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a method for preparing zinc cadmium sulfide solid solutions with different shapes. Background technique [0002] Since the discovery of photocatalytic hydrogen production by photocatalytic water splitting at the end of the 20th century, inorganic material catalysts have gradually become a research hotspot in the field of photocatalytic hydrogen production. So far, commonly used inorganic photocatalysts include: metal and non-metal oxides, nitrides, doped perovskite materials, nitrided pyrochlore materials and other catalyst materials. Due to the tunable bandgap type, Zn x Cd 1-x S-type solid solution sulfides have been extensively studied as a class of visible light-responsive catalysts that efficiently split water to produce hydrogen and have high application prospects. It has been reported that the Zn / Cd ratio for Zn x Cd 1-x The hydrogen production activi...

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Problems solved by technology

However, the photocatalytic hydrogen production performance of these materials is still low, the hydrogen production rate is low, and there is still a large distance from the needs of industrial production. At the same time, the preparation process is complicated, the cycle is long, and the cost is high. Its low catalytic activity and high preparation cost are still constraints. Key issues for further development and application of photocatalysts and large-scale industrial production

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