One-dimensional cadmium sulfide nanorod catalyst, and preparation method and application thereof

Abstract

The invention discloses a one-dimensional cadmium sulfide nanorod catalyst, and a preparation method thereof and an application thereof in producing hydrogen through acoustic catalytic cracking of water. The catalyst has a wurtzite crystal structure, and is non-centrosymmetric crystal. The catalyst satisfy the structural condition of piezoelectric crystal. The specially oriented nanorod shape of the catalyst can enrich environmental soundwave energy through piezoelectric effect, such that negative charge is produced on the surface of the nanorods. Therefore, pure water cracking is catalyzed, and hydrogen gas is produced. The preparation method mainly relates to a one-step solvothermal method. Cadmium sulfide growth orientation is regulated with the coordination or chelation effect of crystal seeds and diethylenetriamine solvent molecules, and the one-dimensional nanorod morphology is obtained under appropriate reaction temperature and reaction time conditions. The activity of the obtained cadmium sulfide nanorods for cracking pure water to produce hydrogen under sound driving is substantially higher than those of nano-flake wurtzite-type cadmium sulfide sample, micro-spherical wurtzite-type cadmium sulfide sample, and nanorod wurtzite-type cadmium sulfide samples obtained with a traditional two-step synthesis method. The cadmium sulfide nanorod catalyst provided by the invention has a good application prospect in the field of sound energy-hydrogen energy conversion. The preparation method is simple to operate, and is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of producing clean energy, and specifically relates to a one-dimensional cadmium sulfide nanorod catalyst and its preparation and application in sonocatalytic cracking of water to produce hydrogen. Background technique [0002] Energy shortage and environmental pollution are becoming more and more serious, which have become two major problems restricting the survival and development of human society. Traditional fossil energy reserves are limited, and combustion products are not environmentally friendly enough to meet the needs of sustainable development of human society. Therefore, there is an urgent need to develop and utilize clean energy. Hydrogen energy is recognized as one of the most potential energy carriers in the future due to its high efficiency and clean characteristics. The production of hydrogen through the reaction of splitting water is an extremely important technical path in the field of hy...

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Problems solved by technology

However, there are few reports on the direct conversion of acoustic vibration energy to hydrogen energy. So far, only hexagonal ZnO fibrous microcrystals, tetragonal ZnO piezoelectric materials that have been reported to use acoustic vibrations to directly drive water splitting reactions to produce hydrogen have been reported. Crystal system BaTiO 3 Dendritic crystallites ( J. Phys. Chem. Lett . 2010, 1, 997–1002), the hydrogen production efficiency of its acoustic drive still needs to be improved, and the range of optional materials is limited, which cannot meet the development needs of acoustic energy-hydrogen energy conversion technology

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