Method for modifying titanium dioxide film by heterocyclic compound
A technology of heterocyclic compounds and titanium dioxide, applied in the fields of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of poor photoelectrochemical stability of titanium dioxide thin film materials, and achieve easy mass production, improve stability, The effect of large use value
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Embodiment 1
[0014] (1) Quartz tube is placed in the tube furnace, one end is connected with the suction filter bottle of vacuum pump, and the other end is connected with the there-necked bottle that 10ml heterocyclic compound is housed through joint from piston;
[0015] (2) Titanium dioxide thin film is placed in quartz tube, begins to pass inert gas argon or high-purity nitrogen for 2 hours, to remove the oxygen in the whole device; Used titanium dioxide thin film is prepared with the following method: first under vigorous stirring condition, will Add 24ml of a mixed solution of titanium isopropoxide and isopropanol (1:1) dropwise to 100ml of aqueous acetic acid at a temperature of about 0°C and pH=2. Stir at room temperature until clear to obtain a transparent solution. After hydrolysis, vigorously stir at 80°C to completely evaporate the isopropanol in the solution. After the solution was slightly cooled, 20ml of pH=2 acetic acid aqueous solution was added and stirred for 12h. Then ...
Embodiment 2
[0022] The implementation steps are the same as in Example 1, the temperature in step (3) is 300° C., and the other process conditions are the same as in Example 1 to prepare a titanium dioxide pyridine-modified thin film material. With the prepared modified film, the base material conductive glass is used as a reference, and the absorption spectrum is measured by Hitachi U3010 as follows: figure 1 As shown in curve 2, it can be seen from the figure that the efficiency of utilizing sunlight increases significantly; the prepared modified film is used as the working electrode, the saturated calomel electrode is used as the reference electrode, the platinum electrode is used as the counter electrode, and the electrolyte used is 0.1M KSCN solution. The scanning speed is 100mV / s, and the light source is a 500W xenon lamp. Electrochemical interface Solartron1287 is used for electrochemistry. The obtained zero current potential is the flat band potential corresponding to 2 in the tabl...
Embodiment 3
[0024]The implementation steps are the same as in Example 1. In step (1), 10 ml of 1-methylimidazole is used as the modifier, and the other process conditions are the same as in Example 1 to prepare a titanium dioxide-methylimidazole-modified film material. With the prepared modified film, the base material conductive glass is used as a reference, and the absorption spectrum is measured by Hitachi U3010 as follows: figure 1 As shown in curve 3, it can be seen from the figure that the efficiency of utilizing sunlight increases significantly; the prepared modified film is used as the working electrode, the saturated calomel electrode is the reference electrode, the platinum electrode is the counter electrode, and the electrolyte used is 0.1MKSCN solution. The scanning speed is 100mV / s, and the light source is a 500W xenon lamp. Electrochemical interface Solartron1287 is used for electrochemistry. The obtained zero current potential is the flat band potential corresponding to 2 in...
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