Method for preparing Sm2Sn2O7/SnO2 nano composite by tin-doped solvothermal-hydrothermal process
A nanocomposite and solvothermal technology, applied in the direction of nanotechnology, nanotechnology, rare earth metal compounds, etc., can solve the problems of limited photocatalytic performance, and achieve the effect of uniform shape, good photocatalytic activity and strong feasibility
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Embodiment 1
[0024] 1) the analytically pure SmCl 3 ·6H 2 O and SnCl 4 ·5H 2 O was dissolved in 10 ml ethanol at a molar ratio of 1:0.1 to prepare Sm 3+ Solution A with a concentration of 0.022mol / L;
[0025] 2) Adjust the pH of solution A to 7 with analytically pure ammonia water, and continue to stir for 1 hour to form a reaction precursor;
[0026] 3) Pour the reaction precursor solution into a polytetrafluoroethylene thermal liner, seal and heat, react at 100°C for 10 hours, and naturally cool to room temperature after the reaction;
[0027] 4) The product was successively washed with distilled water and absolute ethanol for 4 times, and the collected product was vacuum-dried at 60°C for 0.5 h to obtain Sm 2 sn 2 o 7 product;
[0028] 5) The analytically pure SnCl 4 ·5H 2 O and 40ml of 0.0242mol / L of Sm 2 sn 2 o 7 The mixed solution formed by mixing the solutions was put into a reaction kettle, sealed and put into an oven, and reacted at 100° C. for 3 hours, and naturally ...
Embodiment 2
[0031] 1) the analytically pure SmCl 3 ·6H 2 O and SnCl 4 ·5H 2 O was dissolved in 10 ml ethanol at a molar ratio of 1:0.4 to prepare Sm 3+ Solution A with a concentration of 0.025mol / L;
[0032] 2) Adjust the pH of solution A to 9 with analytically pure ammonia water, and continue to stir for 1 hour to form a reaction precursor;
[0033] 3) Pour the reaction precursor solution into a polytetrafluoroethylene thermal liner, seal and heat, react at 120°C for 20 hours, and cool to room temperature naturally after the reaction;
[0034] 4) The product was successively washed with distilled water and absolute ethanol for 4 times, and the collected product was vacuum-dried at 65°C for 0.7h to obtain Sm 2 sn 2 o 7 product;
[0035] 5) The analytically pure SnCl 4 ·5H 2 The mixed solution Sm formed by mixing O and 40mol of 0.034mol / L solution 2 sn 2 o 7 Put it into the reaction kettle, seal the kettle and put it in an oven, react at 120°C for 3.5h, and cool to room temper...
Embodiment 3
[0038] 1) the analytically pure SmCl 3 ·6H 2 O and SnCl 4 ·5H 2 O was dissolved in 10 ml ethanol at a molar ratio of 1:0.6 to prepare Sm 3+ Solution A with a concentration of 0.05mol / L;
[0039] 2) Adjust the pH of solution A to 10 with analytically pure ammonia water, and continue to stir for 1.5 hours to form a reaction precursor;
[0040] 3) Pour the reaction precursor solution into a polytetrafluoroethylene thermal liner, seal and heat, react at 140°C for 25 hours, and naturally cool to room temperature after the reaction;
[0041] 4) The product was successively washed with distilled water and absolute ethanol for 5 times, and the collected product was vacuum-dried at 70°C for 0.8h to obtain Sm 2 sn 2 o 7 product;
[0042] 5) The analytically pure SnCl 4 ·5H 2 O and 40ml of 0.08mol / L Sm 2 sn 2 o 7 The mixed solution formed by mixing the solutions was put into a reaction kettle, sealed and put into an oven, and reacted at 160° C. for 4 hours, and naturally coo...
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