Coating electrode containing titanium black intermediate layer, preparation method and applications thereof, and electrochemical water treatment equipment
A technology of titanium dioxide and coated electrodes, which is applied in the field of electrochemistry, can solve the problems of poor stability of tin-containing coatings, and achieve the effects of good water treatment effect, low cost and simple process
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[0049] The preparation method of the coated electrode containing the titanium oxide intermediate layer provided by the embodiment of the present invention includes: sequentially disposing the titanium oxide intermediate layer and the active layer containing tin oxide on the electrode substrate.
[0050] Specifically include:
[0051] S1. Pretreating the electrode substrate to clean its surface.
[0052]The pretreatment includes in turn: deoxidation layer, degreasing and etching;
[0053] The electrode substrate is repeatedly polished with 40-800 mesh sandpaper until the electrode substrate appears metallic luster. Or use sandblasting to make evenly filled pits on the surface of the electrode substrate to remove the oxide layer on the surface.
[0054] The electrode substrate after removing the oxide layer is placed in alkali solution, and heated at 80-95° C. for 1-3 hours to degrease the surface of the electrode substrate. In a preferred embodiment of the present invention,...
Embodiment 1
[0072] The preparation method of the coated electrode containing the titanium oxide intermediate layer provided in this embodiment is specifically:
[0073] (1) Titanium substrate pretreatment: The titanium plate was repeatedly polished with 80-mesh and 400-mesh sandpaper in sequence until the titanium plate showed a metallic luster. The polished titanium plate was ultrasonicated with deionized water for 10 minutes, then placed in 40 wt% NaOH solution, and heated in a water bath at 95° C. for 1 hour. After alkaline washing, the titanium plate was taken out and ultrasonicated with deionized water for 10 minutes, then the titanium plate was placed in 50 vol% HCl solution, and heated in a water bath at 90° C. for 1 hour. After pickling, it was ultrasonically cleaned with deionized water and dried with nitrogen flow for later use.
[0074] (2) Preparation of titanium oxide intermediate layer: uniformly mix 10g of tetratitanium heptoxide powder with a particle size of <1 μm in a m...
Embodiment 2
[0077] The preparation method of the coated electrode containing the titanium oxide intermediate layer provided in this embodiment is specifically:
[0078] (1) Titanium substrate pretreatment: The titanium plate was repeatedly polished with 80-mesh and 400-mesh sandpaper in sequence until the titanium plate showed a metallic luster. The polished titanium plate was ultrasonicated with deionized water for 10 minutes, then placed in 20 wt% NaOH solution, and heated in a water bath at 80° C. for 3 hours. After the alkali washing, the titanium plate was taken out and ultrasonicated with deionized water for 10 minutes, then the titanium plate was placed in 10 wt% oxalic acid solution, and heated in a water bath at 80° C. for 3 hours. After pickling, it was ultrasonically cleaned with deionized water and dried with nitrogen flow for later use.
[0079] (2) Preparation of titanium oxide intermediate layer: uniformly mix 6g of tetratitanium heptoxide powder and 4g of titanium pentoxi...
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Abstract
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