ti/ebonex/pbo for advanced sewage treatment 2 Electrode preparation method
An electrode and pretreatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of cumbersome process, unfavorable large-scale industrial production, unevenness, etc., and achieve simple process , Solve the effect of electrodeposited layer falling off and electrode life improvement
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0025] The invention provides a kind of Ti / Ebonex / PbO used for pesticide wastewater treatment 2 The preparation method of electrode, comprises the following steps:
[0026]Ti substrate pretreatment: first, sand the Ti substrate with sandpaper to remove surface oxides, then immerse in 5% to 10% sodium hydroxide solution at 100°C for 1 to 2 hours to remove surface oil stains, take it out and wash it with distilled water Dry, then use 300 mesh corundum for sandblasting to increase the roughness of the Ti substrate surface;
[0027] Preparation of Ebonex intermediate layer: Under a nitrogen protective atmosphere, use a plasma spraying machine to spray titanium dioxide powder onto the surface of the Ti substrate after sandblasting to prepare a Ti / Ebonex substrate electrode. The thickness of the titanium dioxide layer is about 200 μm;
[0028] The surface morphology of the prepared Ti / Ebonex electrode is as follows figure 1 shown. from figure 1 It can be seen that there is a cer...
Embodiment 1
[0037] figure 2 The change of cell voltage with electrolysis time under accelerated life test conditions for titanium-based lead dioxide electrodes with or without intermediate transition layer. The test condition is 1.0mol L -1 h 2 SO 4 , with a current density of 0.5A cm -2 , the electrode spacing is 1cm. Depend on figure 2 Known TiO coating and traditional SnO 2 -Sb as an interlayer can significantly increase the lifetime of the electrode. The accelerated life of the lead dioxide electrode without the intermediate layer is very short, less than 10h, while the SnO 2 -Sb and TiO-coated Ti-based PbO electrodes achieved accelerated lifetimes of 430 h and 632 h, respectively. Thereby, the service life of the electrode is greatly improved, and the purpose of strengthening the service life is achieved.
Embodiment 2
[0039] image 3 For the present invention Ti / Ebonex / PbO 2 Electrodes and conventional Ti / SnO 2 -Sb / PbO 2 Electrode degradation effect diagram of perfluorooctane sulfonic acid (PFOS). The initial concentration of PFOS is 1mg L -1 , supports electrolysis for 10mmol L -1 NaClO 4 , with an electrolytic current density of 10mA cm -2 , the plate spacing is 1cm. Depend on image 3 It can be seen that the traditional Ti / SnO 2 -Sb / PbO 2 Electrode can not degrade PFOS effectively, and Ti / Ebonex / PbO of the present invention 2 The electrode can effectively degrade PFOS, after 60min electrolytic treatment, 78.7% of PFOS is degraded.
[0040] Ti / Ebonex / PbO by the present invention 2 The preparation method of the electrode, the Ebonex intermediate layer prepared by the plasma spraying technology is stable, and the basic binding force between the titanium oxide powder and Ti is strong; the Ti / Ebonex / PbO obtained by depositing the Ti / Ebonex electrode as the base electrode 2 The el...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More