A kind of preparation method and obtained product of one-dimensional self-doped titanium dioxide nanometer material
A technology of titanium dioxide and nanomaterials, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., to achieve low reaction temperature, good repeatability, and controllable size
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Embodiment 1
[0044] 1.1 Dissolve 12 g NaOH in 30 mL deionized water and stir at room temperature for 30 min.
[0045] 1.2 Add 0.15 g Ti to the solution described in 1.1 2 o 3 powder, stirred to obtain a homogeneous solution.
[0046] 1.3 Transfer the solution described in 1.2 to a 50 mL reactor, heat it in an oven to 150 °C, and react for 48 h.
[0047] 1.4 Centrifuge and wash the cooled sample to obtain blue sodium titanate nanowires, which are dissolved in 0.1mol / L hydrochloric acid solution for acid exchange for 20-24 hours to obtain titanate nanowires with a diameter of 10 nm-50 nm , its XRD pattern is shown in figure 1 As shown, the scanning electron microscope image is shown in figure 2 shown.
[0048] 1.5 Put the titanate nanowires doped with trivalent titanium into the air and calcined at 550°C to obtain trivalent titanium self-doped titanium dioxide nanowires, the color of which is light blue, and its XRD pattern is as follows image 3 As shown, the transmission electron ...
Embodiment 2
[0050] The preparation method is the same as that in Example 1, except that the prepared titanate nanowires doped with trivalent titanium are calcined at 550° C. in nitrogen, and the color of the obtained product is dark blue.
[0051] Figure 5 It is the photoelectron spectrum (XPS) of embodiment 1,2 and comparative example 1 gained product, as can be seen from the figure, compared with comparative example 1, the Ti2p peak of embodiment 1 and 2 all moves to low energy, and this shows Ti 3+ The existence of ion, and the distance that the Ti2p peak of embodiment 2 products moves is more obvious, shows that the Ti of the gained product under nitrogen atmosphere 3+ high ion concentration.
[0052] Image 6 It is the Raman spectrum (Raman) of the product obtained in embodiment 1, 2 and comparative example 1, as can be seen from the figure, relative to the standard TiO 2 (Comparative Example 1), the Eg vibration of the samples of Example 1 and Example 2 obviously has a position ...
Embodiment 3
[0055] The preparation method is the same as in Example 1, except that the titanium source used is titanium boride. The resulting self-doped titanic acid nanowire morphology is the same as in Example 1, as Figure 8 As shown in a, the diameter is between 10 nm and 30 nm, and the length is above 500 nm.
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