Preparation method and application of a hydrogel material for visible light photolysis of water to produce hydrogen

Abstract

A hydrogel material for visible light photolysis of water to produce hydrogen, prepared by the following method: step 1: preparation of a photosensitizer; step 2: preparation of a catalyst; step 3: preparation of an optical drive compound; step 4: preparation of a gel material preparation. The present invention uses cobalt complexes of phenanthroline derivatives loaded on hydrogels as visible light photolysis water hydrogen production materials, and N-hydroxyethyl-3,3-dimethylindoline, one of the raw materials for preparing hydrogels Spiropyran-methacrylate has a photo-swelling effect. When it is exposed to light, its volume expands, making the pores of the hydrogel larger, which is conducive to the contact between water and the catalyst, and is more conducive to the photosensitizer loaded to receive light. It can make it transition from the ground state to the excited state after absorbing light energy, and it is easier to capture electrons from the electron sacrificial agent and transfer them to the hydrogen production catalyst. The photosensitizer returns to the ground state, and the hydrogen production catalyst converts the hydrogen protons in the water into hydrogen gas.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a hydrogel material for hydrogen production by photolysis of water with visible light. Background technique [0002] With the deterioration of energy consumption and environmental pollution, the development of new clean energy is an important way to deal with this crisis. Due to its abundant reserves, good combustion performance, light weight, and no pollution, hydrogen energy has become an efficient and clean energy that is most likely to replace fossil fuels. Hydrogen energy has broad application prospects in the fields of environmentally friendly vehicles, home heating, and hydrogen power generation. [0003] Hydrogen has good characteristics and is expected to become a substitute for fossil fuels: 1) High combustion value. If 0.1kg of hydrogen is completely burned, it can release 1.43×10 7 J energy, which can heat ...

AI Technical Summary

Problems solved by technology

[0004] Hydrogen production by photolysis of water has the advantages of energy saving, cleanliness, and no pollution. Since photocatalytic water decomposition includes various physical and chemical processes such as photoelectric conversion, charge separation and migration, it is difficult for a single catalyst to independently meet the requirements of each process, resulting in Hydrogen production efficiency is not high