Preparation and application of sliver-nickel double-metal doped titanium dioxide nanocomposite
A nano-composite material, titanium dioxide technology, applied in the oxidation preparation of carbonyl compounds, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as low conversion rate
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Embodiment 1
[0053] (1)O 2 -TiO 2Synthesis of TBOT: slowly add 3mL TBOT into 50mL cold water (5°C), immediately produce a white precipitate; after repeated washing with deionized water, add the precipitate into 50ml deionized water and 25ml H 2 o 2 The mixed solution was kept at 5° C. and stirred for 1 hour to obtain an orange peroxotitanate complex. Then the orange peroxotitanate complex was heated to 50° C. for 4 hours; the reaction solution was dried overnight in an air oven at 100° C. to obtain a yellow solid substance. Then put the yellow solid substance into a muffle furnace, raise the temperature to 300°C at a rate of 10°C / min, and calcine it for 2 hours to obtain 0.7g of orange titanium pertitanate complex O 2 -TiO 2 ;
[0054] (2) Ni-TiO 2 Precursor preparation: 0.05g C 4 h 6 NiO 4 4H 2 O (tetrahydrate and nickel acetate) with the orange perotitanate complex O prepared above 2 -TiO 2 Mixed, heated to 50 ° C for 3 hours; the reaction solution was dried in an air oven a...
Embodiment 2
[0058] (1)O 2 -TiO 2 The synthesis of: with embodiment 1;
[0059] (2) Ni-TiO 2 Precursor preparation: 0.1g C 4 h 6 NiO 4 4H 2 O (tetrahydrate and nickel acetate) and the orange perotitanate complex O prepared above 2 -TiO 2 Mix, and then heat the orange peroxotitanate complex to 50 °C for 3 hours; the reaction solution is dried in an air oven at 100 °C for 10 h to obtain Ni-TiO 2 Precursor;
[0060] (3) Ag-Ni-TiO 2 Synthesis of: take 0.025g AgNO 3 , dissolved in 50ml deionized water, and added 0.04g NaBH 4 (AgNO 3 : NaBH 4 = 2:1), after stirring for 20 minutes, add the above Ni-TiO 2 For the precursor, after stirring and mixing, the mixture was dried overnight in an air oven at 100° C. to obtain a yellow solid substance. Put the yellow solid substance in a muffle furnace, raise the temperature to 300°C at a rate of 10°C / min, and calcinate for 2 hours to obtain Ag-Ni-TiO 2 . The obtained sample Ag-Ni-TiO 2 In, the doping concentration of Ag is 0.5wt%, an...
Embodiment 3
[0063] (1)O 2 -TiO 2 The synthesis of: with embodiment 1;
[0064] (2) Ni-TiO 2 Precursor preparation: 0.025g C 4 h 6 NiO 4 4H 2 Mix O (tetrahydrate and nickel acetate) with the orange peroxotitanate complex prepared above at a mass ratio of 1:100, and then heat the orange peroxotitanate complex to 50°C for 3 to 4 hours; The reaction solution was dried in an air oven at 80-100°C for 10 hours to obtain Ni-TiO 2 Precursor;
[0065] (3) Ag-Ni-TiO 2 Synthesis of: take 0.025g AgNO 3 , dissolved in 50ml deionized water, and added 0.04g NaBH 4 (AgNO 3 : NaBH 4 = 2:1), after stirring for 20 minutes, add the above Ni-TiO 2 For the precursor, after stirring and mixing, the mixture was dried overnight in an air oven at 100° C. to obtain a yellow solid substance. Put the yellow solid substance in a muffle furnace, raise the temperature to 300°C at a rate of 10°C / min, and calcinate for 2 hours to obtain Ag-Ni-TiO 2 . The obtained sample Ag-Ni-TiO 2 In, the doping conc...
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