Preparation method for anchoring copper clusters on surface of cadmium sulfide and application thereof

Abstract

The invention discloses a preparation method for anchoring copper clusters on the surface of cadmium sulfide, and belongs to the technical field of semiconductor photocatalytic material preparation. The preparation method comprises the following steps: preparing a cadmium sulfide nanorod through a hydrothermal synthesis method, carrying out protonation treatment on the cadmium sulfide nanorod to reduce cadmium-sulfur bonding stability, forming defects on the surface of cadmium sulfide through a one-step calcination method, anchoring a solid precursor copper salt in the defects, and finally forming the cadmium sulfide-copper cluster catalyst without ligand wrapping. According to the method, the copper clusters are directly anchored on the surface of the carrier cadmium sulfide through a method for constructing cadmium defects on the surfaces of the cadmium sulfide nanorods to serve as capture sites, and the surfaces of the copper clusters anchored on the cadmium sulfide do not need to be wrapped by any ligand; through construction of direct contact between cadmium sulfide and atoms of a copper atom cluster interface, carrier transmission of a system is promoted, high surface free energy of the copper atom cluster is reduced, and high activity and high stability of the cadmium sulfide-copper atom cluster are realized.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic material preparation, and in particular relates to a preparation method of a photocatalytic material in which copper atom clusters are anchored on the surface of cadmium sulfide and its application in visible light photocatalytic reduction of carbon dioxide to generate carbon monoxide and methane. Background technique [0002] Photocatalytic reduction of carbon dioxide (CO 2 ) can obtain sustainable and renewable clean energy, such as carbon monoxide, methane, methanol, etc., which is conducive to solving the problems of fossil fuel shortage and greenhouse gas, so it is regarded as a new green technology with great potential. As a transition metal semiconductor material, cadmium sulfide can be used in the photocatalytic reduction of CO due to its suitable band gap and excellent photoelectric properties. 2 field has received extensive attention. However, due to the unstable c...

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Problems solved by technology

However, it should be pointed out that most of the current studies on carrier-anchored metal atom clusters are precious metals, which are scarce and expensive, which is not conducive to large-scale promotion and application.

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