Silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst and preparation method and application thereof
A nanoparticle, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, other chemical processes, etc., can solve the problem of difficult to effectively match energy band positions, low photo-generated carrier separation efficiency, low specific surface area, etc. problems, to achieve the effect of improving photocatalytic activity, inhibiting recombination, and increasing specific surface area
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Embodiment 1
[0046] A silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst, the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst uses three-dimensional microspherical bismuth tungstate as a carrier, and the three-dimensional microspherical bismuth tungstate is decorated with silver iodide nanoparticles .
[0047] In this embodiment, the mass ratio of silver iodide nanoparticles to three-dimensional microspherical bismuth tungstate is 0.05:1.
[0048] In this example, the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst has a diameter of 3 μm to 6 μm; the three-dimensional microspherical bismuth tungstate is assembled from two-dimensional bismuth tungstate nanosheets; the silver iodide nanoparticle has a diameter of 10 nm to 6 μm. 20nm.
[0049] A method for preparing the silver iodide nanoparticles modified bismuth tungstate heterojunction photocatalyst of the above-mentioned present embodime...
Embodiment 2
[0057] A silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst, which is basically the same as the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst in Example 1, the only difference being: silver iodide nanoparticles and tungstic acid in Example 2 The mass ratio of bismuth is 0.1:1.
[0058] A method for preparing the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst described above in this embodiment is basically the same as the preparation method in Example 1, the only difference being that the amount of silver nitrate used in the preparation method in Example 2 is 0.051 g, the concentration of potassium iodide solution is 1.97g / L.
[0059] The silver iodide nanoparticle modified bismuth tungstate heterojunction photocatalyst obtained in Example 2 is named after AgI(10wt%) / Bi 2 WO 6 .
Embodiment 3
[0061] A silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst, which is basically the same as the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst in Example 1, the only difference being: silver iodide nanoparticles and tungstic acid in Example 3 The mass ratio of bismuth is 0.2:1.
[0062] A method for preparing the silver iodide nanoparticle-modified bismuth tungstate heterojunction photocatalyst of the above-mentioned present embodiment is basically the same as the preparation method of Example 1, the only difference being that the amount of silver nitrate in the preparation method of Example 3 is 0.101 g, the concentration of potassium iodide solution is 3.95g / L.
[0063] The silver iodide nanoparticle modified bismuth tungstate heterojunction photocatalyst obtained in Example 3 is named after AgI(20wt%) / Bi 2 WO 6 .
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