Preparation method of electrode for sewage decolorization treatment

The invention relates to the field of chemical synthesis, and discloses a preparation method of an electrode for sewage decolorization treatment, which comprises the following steps of: 1, stirring and dissolving SnCl4, SbCl3 and CoCl2 under an acidic condition to obtain an intermediate layer precursor; 2, stirring and dissolving SnCl4, SbCl3 and Er (NO3) 3 under an acidic condition to obtain an active layer precursor; and 3, dipping a titanium sheet in the intermediate layer precursor, sintering, dipping in the active layer precursor, sintering, and finally obtaining the required electrode. According to the method, the rare earth erbium-doped Ti/SnO2-Sb electrode with the cobalt-containing middle layer can be effectively prepared, the surface of the electrode can be agglomerated due to the doping of the cobalt in the middle layer, so that the surface area of the electrode is increased, and the electrochemical activity of the electrode is improved. 本发明涉及化学合成领域，公开了一种用于污水脱色处理的电极的制备方法，其过程如下：1.在酸性条件下，将SnCl4、SbCl3