Preparation of nano-structured DSA
A nanostructure, anode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of non-dense electrode surface coating, low oxygen evolution potential, low specific surface area, etc. The effect of increasing the specific surface area
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specific Embodiment approach 1
[0021] Specific embodiment one: this embodiment is on the basis of the paper that the inventor has published, has investigated in detail the impact of the usage amount of complexing agent citric acid on electrode performance, and designed a group of experiments:
[0022] keep SnCl 4 The concentration of solution and ammonia water is constant at 0.5mol / L, adding SnCl 4 The molar ratios of citric acid were 0, 0.25:1, 0.5:1, 0.75:1, 1:1, and 1.5:1, and the electrodes were all in accordance with the "Titanium-based SnO 2 Preparation and Performance Research of Nano-coated Electrocatalytic Electrode" prepared according to the steps described in the article, heat treatment at 600°C for 3 hours, and this process was repeated twice. Six electrodes were used for degradation experiments to investigate their response to 100mg / L phenol+0.25 MNaSO 4 For the degradation of the solution, use 4-aminoantipyrine spectrophotometry to track the change of phenol concentration in the degradation ...
specific Embodiment approach 2
[0045] Specific embodiment two: the preparation method of the DSA electrocatalytic electrode of the nanostructure described in this embodiment includes the following detailed process:
[0046] 1. Pretreatment of titanium substrate:
[0047] (1) Grinding: Grind first with 40-mesh coarse sandpaper, then with 320-mesh fine sandpaper to make the surface of the titanium substrate present a silver-white metallic luster, and rinse with distilled water;
[0048] (2) Alkali washing: then soak the titanium substrate with a 40% NaOH solution by mass percentage, heat in a water bath at 95°C for 2 hours, and rinse with distilled water;
[0049] (3) Pickling: Soak the titanium substrate with 15% oxalic acid solution by mass, heat in a water bath at 95°C for 2 hours, and rinse with distilled water. The surface of the treated titanium substrate is pitted and loses luster.
[0050] 2. The preparation process of sol to obtain precursors:
[0051] (1), weigh 0.44gSb 2 o 3 , add 3mL concentra...
specific Embodiment approach 3
[0058] Specific Embodiment Three: The difference between this embodiment and the previous embodiment is that the following process is added between step a and step b in "B. Preparation of sol process": adding 1 mole of chloride or nitrate of semiconductor material ~10% rare earth nitrate or chloride, the rare earth is any one of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy or a mixture of multiples in any proportion.
[0059] The inventors investigated the effects of various rare earth elements and the mixture of rare earth elements in different proportions on the performance of the electrode: the electrocatalytic performance of the electrode prepared after adding rare earth elements to the raw materials has not been significantly improved, but the rare earth elements Doping increases the conductivity of the electrode, so that under the same current density, the electrode voltage decreases, thereby reducing power consumption and improving current efficiency. At the same time, the doping of ...
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Abstract
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