Preparation method of tantalum oxide nanosheet
A technology of nanosheets and nanomaterials, which is applied in the field of nanomaterial preparation, can solve the problems of limited resources, high price of noble metal catalysts, and inability to be applied on a large scale, and achieve the effect of high purity
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Embodiment 1
[0014] In this embodiment, Ta 1.1 o 1.05 The preparation process of the nanosheets is as follows: the (NH4) prepared by the hydrothermal method 2 Ta 2 o 3 f 6 Nanomaterials are used as precursors, in an air atmosphere (containing oxygen), at a heating rate of 5 °C / min to 600 °C for 3 hours, and after cooling in the furnace, Ta 1.1 o 1.05 Nanosheets.
[0015] The (NH4) used in this embodiment 2 Ta 2 o 3 f 6 The preparation method of the precursor is as follows:
[0016] Metal tantalum powder, hydrofluoric acid with a mass fraction of 40%, analytically pure acetic acid, urea and deionized water are used as raw materials. The steps are as follows: (1) Mix hydrofluoric acid and metal tantalum powder at a molar ratio (3-12): 1, and stir well until the metal tantalum powder is dissolved; (2) Mix deionized water and glacial acetic acid according to the volume ratio ( 0.17~6): 1 mixed evenly; and the acetic acid solution was gradually dropped into the mixed solution obtain...
Embodiment 2
[0020] The present embodiment is different from Example 1 in that (NH4) prepared by hydrothermal method 2 Ta 2 o 3 f 6 Nanopowders were used as precursors in an air atmosphere (containing oxygen), and the temperature was raised to 700°C at a rate of 5°C / min and kept for 3 hours. Other is identical with embodiment 1; Can obtain Ta 1.1 o 1.05 Nanosheets.
[0021] The obtained white powder after heat treatment is subjected to X-ray diffraction phase analysis (XRD), and the obtained XRD spectrum is as follows image 3 shown. Its XRD diffraction peak and Ta 1.1 o 1.05 phase (PDF 01-072-2219); and there is no other crystal impurity phase in this spectrum; this shows that (NH4) 2 Ta 2 o 3 f 6 As a precursor, single-phase, high-purity Ta 1.1 o 1.05 Nanosheets.
[0022] Figure 4 For the prepared Ta 1.1 o 1.05 A scanning electron microscope (SEM) image of a nanomaterial, which has a uniform nanosheet morphology with a length of 0.3-0.5 μm; a width of 0.2-0.5 μm and a ...
Embodiment 3
[0024] The present embodiment is different from Example 1 in that (NH 4 ) 2 Ta 2 o 3 f 6 The nanopowder was used as a precursor, and was kept at a temperature of 550 °C for 5 hours in an air atmosphere (containing oxygen) at a heating rate of 1 °C / min. Other is identical with embodiment 1; Can obtain Ta 1.1 o 1.05 Nanosheets.
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Abstract
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