Preparation method of cobalt carbonate composite bismuth carbonate photocatalyst

Abstract

The invention discloses a preparation method of a cobalt carbonate composite bismuth carbonate photocatalyst. The preparation method concretely comprises the following steps: weighing 12-16 mmol of cobalt nitrate, preparing a 12 mmol / L cobalt nitrate solution, weighing 6.6-8 mmol of sodium carbonate, and preparing a 16 mmol / L sodium carbonate solution; mixing the above two solutions at a rotating speed of 350-400 r / min to form a gummy substance, continuously stirring the gummy substance for 3-4 h, and reacting the sodium carbonate with the cobalt nitrate in the stirring process to generate cobalt carbonate colloid; and placing the cobalt carbonate colloid in a semi-permeable membrane bag, washing the cobalt carbonate colloid with distilled water 3-4 times to remove free ions, adding the cobalt carbonate colloid into 60-80 mL of a bismuth nitrate solution with the concentration of 0.1-0.3 mol / L, immersing the colloid for 6-10 d to form bismuth carbonate nano-particles on the surfaces of cobalt carbonate particles, carrying out solid-liquid separation, washing the obtained solid with deionized water 2-3 times, and drying the washed solid at 75-105 DEG C to prepare the cobalt carbonate composite bismuth carbonate photocatalyst. The catalyst is formed on the surface of cobalt carbonate through the method, and is closely combined with a carrier.

Description

technical field [0001] The invention relates to a preparation method of a cobalt carbonate composite bismuth carbonate photocatalyst, belonging to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] Semiconductor photocatalysis is one of the most promising a...

AI Technical Summary

Problems solved by technology

Due to the limitation of its own characteristics, the performance of cobalt carbonate needs to be improved in terms of photocatalytic degradation