Carbon-modified silver phosphate/titanoniobate compound visible light pholocatalyst and preparation thereof
A technology of titanium niobate and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of weak visible light activity, achieve good modification effect, increase specific surface area, contact tight effect
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Embodiment 1
[0017] Will Nb 2 o 5 、TiO 2 and K 2 CO 3 Weigh and mix at a molar ratio of 1:3:1, grind evenly in an agate mortar, add to a corundum crucible, heat to 1150°C at a rate of 15°C / min, keep warm for 10h, and take it out after naturally cooling to room temperature. further grind into solid powder in a bowl to obtain KTiNbO 5 powder; KTiNbO with a weight of 5 g 5 The powder was added to 20mL of tetramethylammonium bromide solution with a concentration of 100mmol / L, and stirred for 2h to form a modified KTiNbO 5 Suspension; at 25°C, with continuous stirring, dissolve 3g of ammonium carbamate in 10ml of methanol, and add 2g of silver oxide, after stirring, the silver oxide gradually dissolves to form an organic complex of silver; at 25°C, Adding silver organic complexes to modified KTiNbO 5 In the suspension, stir for 4 hours, precipitate and separate, and dry at 85°C; place the dried product in a vacuum tube furnace, raise the temperature to 600°C under vacuum, keep it for 3 h...
Embodiment 2
[0020] Will Nb 2 o 5 、TiO 2 and K 2 CO 3 Weigh and mix at a molar ratio of 1:2:1, grind evenly in an agate mortar, add to a corundum crucible, heat to 1150°C at a rate of 10°C / min, keep warm for 8 hours, take it out after naturally cooling to room temperature, and put it in an agate grinder. further grind into solid powder in a bowl to obtain KTiNbO 5 powder; KTiNbO with a weight of 5 g 5 The powder was added to 20 mL of tetramethylammonium bromide solution with a concentration of 50 mmol / L, and stirred for 2 h to form a modified KTiNbO 5 Suspension; at 20°C, keep stirring, dissolve 2g of ammonium carbamate in 10ml of methanol, and add 1g of silver oxide, after stirring, the silver oxide gradually dissolves to form an organic complex of silver; at 20°C, Adding silver organic complexes to modified KTiNbO 5 In the suspension, stir for 2 hours, precipitate and separate, dry at 60°C, place the dried product in a vacuum tube furnace, raise the temperature to 500°C under vacu...
Embodiment 3
[0023] Will Nb 2 o 5 、TiO 2 and K 2 CO 3 Weigh and mix at a molar ratio of 1:2:1, grind evenly in an agate mortar, add to a corundum crucible, heat to 1150°C at a rate of 10°C / min, keep warm for 9 hours, take it out after naturally cooling to room temperature, and put it in an agate grinder. further grind into solid powder in a bowl to obtain KTiNbO 5 powder; KTiNbO with a weight of 5 g 5 The powder was added to 20mL of tetramethylammonium bromide solution with a concentration of 100mmol / L, and stirred for 2h to form a modified KTiNbO 5 Suspension; at 25°C, with continuous stirring, dissolve 3g of ammonium carbamate in 10ml of methanol, and add 2g of silver oxide, after stirring, the silver oxide gradually dissolves to form an organic complex of silver; at 25°C, Adding silver organic complexes to modified KTiNbO 5 In the suspension, stir for 3 hours, precipitate and separate, and dry at 75°C; place the dried product in a vacuum tube furnace, raise the temperature to 600...
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