Visible-light responding photocatalyst Li4Sm2NiTiO8 and preparation method thereof
A photocatalyst and visible light technology, which is applied in the direction of light water/sewage treatment, etc., can solve the problems of limited photocatalyst types, low photoconversion efficiency, and difficult synthesis, and achieve a wide range of visible light response frequencies, high photoconversion efficiency, and a preparation method simple effect
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Embodiment 1
[0018] (1) The analytically pure chemical raw material Li 2 CO 3 、Sm 2 o 3 , NiO and TiO 2 The raw powder of Li 4 SM 2 NiTiO 8 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 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, Li 4 SM 2 NiTiO 8 powder.
[0021] The prepared photocatalyst can remove 97.6% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
Embodiment 2
[0023] (1) The analytically pure chemical raw material Li 2 CO 3 、Sm 2 o 3 , NiO and TiO 2 The raw powder of Li 4 SM 2 NiTiO 8 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 730°C, keep it warm for 6 hours, cool it down to room temperature naturally, and then pulverize it with a ball mill to make the average particle diameter smaller than 2 μm, that is, Li 4 SM 2 NiTiO 8 powder.
[0026] The prepared photocatalyst can remove 98.6% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
Embodiment 3
[0028] (1) The analytically pure chemical raw material Li 2 CO 3 、Sm 2 o 3 , NiO and TiO 2 The raw powder of Li 4 SM 2 NiTiO 8 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 750°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, Li 4 SM 2 NiTiO 8 powder.
[0031] The prepared photocatalyst can remove 98.2% of methyl orange in 60 minutes under the irradiation of visible light with wavelength greater than 420nm.
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