Abstract: Provided herein is a method for preparing a flat-surfaced MAPbBr3 perovskite block and a use thereof. The preparation steps include: preparing a mixed solution formed by adding MABr and PbBr2 to a DMF solution; preparing a nickel foam mesh with the precursor solution; removing excess reaction liquid from the nickel foam mesh; and drying the nickel foam mesh to obtain the flat-surfaced MAPbBr3 perovskite block. It employs a solution-based method to fabricate MAPbBr3 perovskite on a nickel foam mesh, resulting in flat-surfaced MAPbBr3 perovskite blocks. The prepared perovskite can be utilized in the fields of solar cells, LEDs, and photoelectric hydrolysis. The method is simple and easy to operate, by using a solution-based method on a nickel foam mesh, flat-surfaced perovskite blocks can be formed, and the flat surface is beneficial for light absorption and energy conversion, thus enhancing the performance of the sample.

Abstract: The present disclosure discloses a method for preparing a carbon nanodot-modified nickel phosphide nanosheet and a use thereof as auxiliary materials in water electrolysis. The preparation steps include: preparing water solution containing carbon nanodots; attaching the carbon nanodots to the surface of a hydrogen-producing electrode in water electrolysis; and annealing the hydrogen-producing electrode with carbon nanodots. The carbon nanodots obtained by this preparation method have extremely small sizes and relatively uniform diameters, facilitating the attachment with other materials, and the integration of these carbon nanodots with the hydrogen-producing electrode in water electrolysis significantly enhances the hydrogen production efficiency, substantially reducing the cost required for hydrogen production through water electrolysis.