One kind of nano micron bismuth oxycarbonate sheet material and method

The invention discloses a nano/micro-scale sheet bismuthyl carbonate material and a preparation method thereof. Micro-morphology of the nano/micro-scale sheet bismuthyl carbonate material is in the shape of a sheet-like particle. The particle size is in a range of 10 to 1000 nm. The preparation method comprises that urea is prepared into a urea aqueous solution; the urea aqueous solution and bismuth nitrate pentahydrate are mixed according to a certain proportion; the mixed solution is maintained at a temperature of 100 to 200 DEG C under the pressure above 3MPa for 1 to 4 hours to undergo a reaction; after the reaction, the reaction products are cooled in air to room temperature; and the cooled products are filtered by a pump, washed by water and dried at room temperature to form the nano/micro-scale sheet bismuthyl carbonate material. The nano/micro-scale sheet bismuthyl carbonate material has the advantages of good dispersibility, high purity, high bismuth recovery rate above 90%, no need of addition of any organic solvent in preparation, and no damage on human bodies and the environment.