Anthemia-shaped NiS/ZnS visible light photocatalyst and preparation method thereof

Abstract

The invention discloses an anthemia-shaped NiS / ZnS visible light photocatalyst and a preparation method thereof, the anthemia-shaped NiS / ZnS visible light photocatalyst comprises the following raw materials by weight: 1-5 parts of an inorganic zinc salt, 2-10 parts of thioacetamide or thiourea, 38-50 parts of ethanolamine or ethylenediamine, and 0.01-0.02 part of an inorganic nickel salt. The method is as follows: adding the inorganic zinc salt and thioacetamide or thiourea into a container filled with the ethanolamine or ethylenediamine, stirring evenly at less than 45 DEG C, standing for 15-20min to obtain suspension; reacting in microwave at the temperature of 140-150 DEG C for 4-5min, cooling a reaction kettle to room temperature to obtain an anthemia-shaped ZnS complex precursor; reacting in microwave at the temperature of 140-150 DEG C for 20-25min to obtain a primary product, centrifugally drying to obtain the anthemia-shaped NiS / ZnS visible light photocatalyst. The anthemia-shaped NiS / ZnS visible light photocatalyst has the advantages of simple method operation, low cost and wide raw materials, can be recycled, has excellent visible light photocatalytic hydrogen production activity under visible light irradiation, and can promote photocatalytic hydrogen production industrialization.

Description

technical field [0001] The invention relates to the field of photocatalysts, and specifically refers to a NiS / ZnS photocatalyst with special morphology, a NiS / ZnS visible light photocatalyst with flower clusters. Background technique [0002] With the huge energy crisis brought about by the impending depletion of fossil energy, it is imminent to develop clean and renewable new energy. Hydrogen energy, known as "future oil", has a high combustion value and zero pollution, and has been generally regarded as one of the ideal ways to relieve energy and environmental pressure in the new century. Among the means of hydrogen energy development, the use of solar photocatalysis Hydrogen production by splitting water is one of the most ideal and promising means for photochemical conversion and storage of solar energy. Water resources are extremely abundant on the earth, and this technology, which can produce hydrogen and oxygen using only sunlight and water, will become "one of the i...

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Problems solved by technology

[0006] 1) The commonly used sulfide photocatalyst CdS is poisonous, and non-toxic ZnS is often compounded with toxic CdS to solve the problem of environmental pollution;

[0007] (2) Metal composite sulfide photocatalysts are mostly prepared by high-temperature calcination and solvothermal method. The high-temperature calcination is a bulk photocatalyst without special morphology. The separation advantage of photogenerated charges and holes brought by the size effect is not, so the photocatalytic hydrogen production efficiency of bulk photocatalysts without special morphology is generally low, because photogenerated charges and holes are very easy to recombine

Ordinary solvothermal method has a long reaction time (more than 20h), rough grain shape control, easy to obtain spherical and sheet-shaped photocatalysts, and difficult to obtain photocatalysts with other shapes. It is necessary to solve the long reaction cycle and difficult shape control of traditional preparation methods. The problem

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