Metal M-doped titanium dioxide photocatalyst and application thereof in photocatalytic nitrogen fixation
A technology of photocatalyst and metal doping, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., which can solve the problem of low utilization rate of sunlight and limitation of TiO2 photocatalysis Ability and other issues, to achieve broad application prospects, enhance the separation ability of photogenerated carriers, and low energy consumption
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Embodiment 1
[0031] 1. M-TiO 2 Preparation of photocatalyst:
[0032] Measure 6mL (0.017mol) of tetrabutyl titanate and add it dropwise to 25mL of absolute ethanol under stirring, pipette and add 1mL of hydrofluoric acid, then add 0.001mol (that is, the doping ratio of 6%) of Fe(NO 3 ) 3 9H 2 O, stirred at room temperature for 30 min, transferred to a 50 mL autoclave, reacted at 180 °C for 2 h, cooled to room temperature, centrifuged, washed with deionized water three times, dried at 80 °C for 12 h, and ground to obtain Fe-TiO with oxygen vacancies 2 Powder 1.0g, X-ray diffraction (XRD) pattern sees figure 1 shown in the transmission electron microscope (TEM) image figure 2 The electron paramagnetic resonance (EPR) spectrum is shown in image 3 . figure 1 Each diffraction peak corresponds to the anatase TiO 2each crystal plane, and no diffraction peaks of other impurities were detected, proving that Fe was successfully doped to TiO 2 lattice. figure 2 It can be seen that the Fe-...
Embodiment 2
[0042] Change the amount of absolute ethanol in Example 1 to 20, 25, 30, 35, and 40 mL, and other operations are the same as in Example 1. The ammonia content is shown in Table 2.
[0043] Table 2 The effect of the amount of absolute ethanol on the output of photocatalytic ammonia
[0044]
[0045]
[0046] It can be seen from Table 2 that when the addition of absolute ethanol is 25mL, the Fe-doped TiO 2 The photocatalytic ammonia yield was the highest.
Embodiment 3
[0048] The amount of tetrabutyl titanate in Example 1 was changed to 5, 6, 7, 8, 9, and 10 mL, and other operations were the same as in Example 1. The results are shown in Table 3.
[0049] Table 3 The effect of tetrabutyl titanate amount on the output of photocatalytic ammonia
[0050]
[0051] It can be seen from Table 3 that when the addition of tetrabutyl titanate is 6mL, the Fe-doped TiO 2 The photocatalytic ammonia yield was the highest.
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