Photocatalyst Li2La2MgTiO7 capable of responding to visible light and preparation method thereof
A photocatalyst and visible light technology, applied in the field of inorganic photocatalytic materials, can solve problems such as narrow spectral response range, low photoconversion efficiency, and difficult synthesis, and achieve the effect of wide response frequency range, high photoconversion efficiency and simple preparation method
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Embodiment 1
[0018] (1) The analytically pure chemical raw material Li 2 CO 3 , La 2 o 3 , MgO and TiO 2 The raw powder of Li 2 La 2 MgTiO 7 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 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 2 La 2 MgTiO 7 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) The analytically pure chemical raw material Li 2 CO 3 , La 2 o 3 , MgO and TiO 2 The raw powder of Li 2 La 2 MgTiO 7 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 780°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 2 La 2 MgTiO 7 powder.
[0026] The prepared photocatalyst can remove 98.9% 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 , La 2 o 3 , MgO and TiO 2 The raw powder of Li 2 La 2 MgTiO 7 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 800°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 2 La 2 MgTiO 7 powder.
[0031] The prepared photocatalyst can remove 98.5% of methyl orange in 60 minutes under the irradiation of visible light with a wavelength greater than 420nm.
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