一种记忆型光催化纤维素微球的制备方法

本发明属于化工领域，尤其涉及一种记忆型光催化纤维素微球的制备方法。利用ZnO和Cuz0 之间的电子存储功能，实现未光照条件下的催化降解功能。该方法以溶解浆纤维为原料，以反相乳液法制备再生纤维素微球，然后诱导Cu2O前驱物，经还原法制备Cu20/纤维素微球，再经水热法，在Cuz0/纤维素微球表面负载ZnO纳米晶体。本发明制备的Zn0/Cuz20纤维素复合微球可以取代现有的氧化锌类光催化材料，利用ZnO和Cuz2O 之间的电子存储功能，实现未光照条件下的催化降解功能；利用纤维素微球丰富的多孔性，制备出的复合型光催化剂具有高比表面积、高孔容特。征，显示出较好的光催化降解及记忆性能

This invention belongs to the field of chemical engineering, and particularly relates to a preparation method of memory-type photocatalytic cellulose microspheres. By leveraging the electron storage function between ZnO and Cu₂O, the composite material can achieve catalytic degradation performance under dark conditions. This method uses dissolving pulp fibers as raw materials, prepares regenerated cellulose microspheres via the inverse emulsion method, then induces Cu₂O precursors, prepares Cu₂O/cellulose microspheres through a reduction approach, and subsequently loads ZnO nanocrystals onto the surface of the Cu₂O/cellulose microspheres via a hydrothermal method. The ZnO/Cu₂O cellulose composite microspheres prepared by this invention can replace existing zinc oxide-based photocatalytic materials. By utilizing the electron storage effect between ZnO and Cu₂O, they enable catalytic degradation under dark conditions; furthermore, benefiting from the rich porosity of cellulose microspheres, the as-prepared composite photocatalyst exhibits high specific surface area and high pore volume, demonstrating excellent photocatalytic degradation performance and memory properties.