Synthetic method of SiO2 modified TiO2 single crystal particle photocatalyst
A synthesis method and photocatalyst technology, which can be used in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., and can solve problems such as high cost and complex process
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Embodiment 1
[0025] (1) Mix 2 mL of acetylacetone and 5 mL of tetra-n-butyl titanate, stir and react for 0.5 h to obtain tetra-n-butyl titanate complex;
[0026] (2) Add 2 mL of cyclohexane and 40 mL of absolute ethanol to the complex obtained in step (1), stir for 10 min to form a uniform solution, then add 40 mL of distilled water and stir for 30 min, then add 0.72 mL of ethyl orthosilicate, Continue stirring for 30min to obtain a hydrothermal solution;
[0027] (3) Transfer the hydrothermal solution obtained in step (2) to a hydrothermal reaction kettle, react at 150° C. for 10 h, and then cool naturally to room temperature (25° C.);
[0028] (4) Centrifuge the solid product obtained from the hydrothermal reaction in step (3), wash it with distilled water and then wash it with ethanol three times, and dry it in an oven at 100°C for 2 hours to obtain SiO 2 TiO with a mole fraction of 20% 2 / SiO 2 Composite photocatalyst (TS20).
[0029] By heat-treating TS20 at different temperatures...
Embodiment 2
[0031] (1) Mix 2 mL of acetylacetone and 5 mL of tetra-n-butyl titanate, stir and react for 0.5 h to obtain tetra-n-butyl titanate complex;
[0032] (2) Add 2 mL of cyclohexane and 40 mL of absolute ethanol to the complex obtained in step (1), stir for 10 min to form a uniform solution, then add 40 mL of distilled water and stir for 30 min, then add 1.39 mL of ethyl orthosilicate, Continue stirring for 30min to obtain a hydrothermal solution;
[0033] (3) Transfer the hydrothermal solution obtained in step (2) to a hydrothermal reaction kettle, react at 150° C. for 10 h, and then naturally cool to room temperature (25° C.);
[0034] (4) Centrifuge the solid product obtained from the hydrothermal reaction in step (3), wash it with distilled water and then wash it with ethanol three times, and dry it in an oven at 100°C for 2 hours to obtain SiO 2 TiO with a mole fraction of 30% 2 / SiO2 Composite photocatalyst (TS30).
[0035] Weigh 10 mg of the above-mentioned TS30 catalyst ...
Embodiment 3
[0037] (1) Mix 2 mL of acetylacetone and 5 mL of tetra-n-butyl titanate, stir and react for 0.5 h to obtain tetra-n-butyl titanate complex;
[0038] (2) Add 2 mL of cyclohexane and 40 mL of absolute ethanol to the complex obtained in step (1), stir for 10 min to form a uniform solution, then add 40 mL of distilled water and stir for 30 min, then add 2.19 mL of ethyl orthosilicate, Continue stirring for 30min to obtain a hydrothermal solution;
[0039] (3) Transfer the hydrothermal solution obtained in step (2) to a hydrothermal reaction kettle, react at 150° C. for 10 h, and then cool naturally to room temperature (25° C.);
[0040] (4) Centrifuge the solid product obtained from the hydrothermal reaction in step (3), wash it with distilled water and then wash it with ethanol three times, and dry it in an oven at 100°C for 2h to obtain SiO 2 TiO with a mole fraction of 50% 2 / SiO 2 Composite photocatalyst (TS50).
[0041] Table 1: Pure titanium dioxide and TiO in each of th...
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