Visible-light-responsive photocatalyst SrLi3FeV8O24 and preparation method thereof
A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of limited types of photocatalysts, low photoconversion efficiency, and difficult synthesis and other problems, to achieve the effects of wide frequency range of visible light response, high light conversion efficiency, and simple preparation method
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Embodiment 1
[0018] (1) 99.9% analytically pure chemical raw material SrCO 3 , Li 2 CO 3 , Fe 2 o 3 and V 2 o 5 Raw powder by SrLi 3 FeV 8 o 24 The composition weighs the ingredients.
[0019] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.
[0020] (3) Pre-fire the uniformly mixed powder in step (2) at 650°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it through a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain SrLi 3 FeV 8 o 24 powder.
[0021] The prepared photocatalyst can remove 97.9% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
Embodiment 2
[0023] (1) 99.9% analytically pure chemical raw material SrCO 3 , Li 2 CO 3 , Fe 2 o 3 and V 2 o 5 Raw powder by SrLi 3 FeV 8 o 24 The composition weighs the ingredients.
[0024] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.
[0025] (3) Pre-fire the uniformly mixed powder in step (2) at 680°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it through a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain SrLi 3 FeV 8 o 24 powder.
[0026] The prepared photocatalyst can remove 98.7% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
Embodiment 3
[0028] (1) 99.9% analytically pure chemical raw material SrCO 3 , Li 2 CO 3, Fe 2 o 3 and V 2 o 5 Raw powder by SrLi 3 FeV 8 o 24 The composition weighs the ingredients.
[0029] (2) Mix the raw materials prepared in step (1), put them into a ball mill jar, add zirconia balls and absolute ethanol, ball mill for 8 hours, mix and grind until fine, take it out and dry it, and pass through a 200-mesh sieve.
[0030] (3) Pre-fire the uniformly mixed powder in step (2) at 700°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it through a ball mill to make the average particle diameter smaller than 2 μm, that is, to obtain SrLi 3 FeV 8 o 24 powder.
[0031] The prepared photocatalyst can remove 98.2% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
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