Visible light response semiconductor-MOFs hybrid photoelectrocatalytic material electrode and preparation method thereof

Abstract

The invention discloses a visible light response semiconductor-MOFs hybrid photoelectrocatalytic material electrode and a preparation method thereof; the electrode takes a nitrogen-fluorine co-doped titanium dioxide electrode plate as an electrode substrate, and is loaded with ZIF-8. The preparation method comprises the steps: preparing an amorphous TiO2 and the nitrogen-fluorine co-doped titaniumdioxide electrode plate; and growing ZIF-8 on the nitrogen-fluorine co-doped titanium dioxide electrode plate in situ. The electrode provided by the invention has the advantages of strong mechanicalstability, excellent catalytic performance, high cycle efficiency, strong light utilization capability and the like, and can realize efficient degradation of antibiotics under visible light; and meanwhile, the electrode can be easily recycled, and has relatively high popularization value and relatively good application prospect. The preparation method provided by the invention has the advantages of uniform deposition, easily available raw materials, convenient recovery, wide application, easy operation, high practicability and the like, is suitable for large-scale preparation, and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic electrode material preparation, and in particular relates to a method for preparing a visible light responsive semiconductor-MOFs hybrid photoelectric catalytic material electrode. Background technique [0002] Photoelectrocatalysis (PEC) generates a potential gradient inside the photoanode by applying an anode bias, forcing the photogenerated electrons to move toward the counter electrode and separate from the photogenerated holes. PEC can fully exert the synergistic effect of light and electricity, and at the same time, it can solve the problem that it is difficult to effectively recycle the powder catalyst in photocatalysis, and improve the recycling rate. However, conventional photoanodes are constructed by coating powdered catalysts on conductive glass to form bulk electrodes, which reduces the mass transfer rate and dispersion. Therefore, effectively improving the mass transfer proce...

AI Technical Summary

Problems solved by technology

However, N-TiO 2 The mixed gap of N 2p and O 2p above the valence band leads to relatively low oxidation ability of photogenerated holes under photoexcitation, which greatly limits the application of titanium dioxide in the field of photoelectrocatalysis.

In addition, there are few studies on the in-situ growth of MOFs loaded onto substrates, and the existing MOFs composites are mainly in powder form, which is difficult to effectively recycle and easily causes secondary pollution. The existence of the above problems, such as weak utilization ability, greatly limits its promotion and application in the environment.

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