Multi-dimensional TiO2 'crystal face heterojunction' cubic empty box catalyst constructed based on seed growth method and application thereof
A technology of heterojunction and catalyst, applied in physical/chemical process catalysts, catalyst activation/preparation, organic chemistry, etc., can solve the problem of lack of crystal-plane heterojunction materials, and achieve separation, tight bonding, and photocatalysis. The effect of organic decarboxylation
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Embodiment 1
[0081] Example 1: A 1D-TiO constructed based on the seed growth method 2 Nanorod / 3D-TiO 2 Cubic empty box "crystal plane heterojunction" catalyst, prepared by the following method:
[0082] (1) 3D-TiO 2 Preparation of cubic empty box: Measure 30mL glacial acetic acid in a polytetrafluoroethylene beaker, slowly add 5mL HF (44wt% aqueous solution) to it, stir evenly, then add 15mL tetrabutyl titanate (TBT, AR, The same below), after stirring for 30 minutes, a white suspension was obtained, and then the white suspension was transferred to the liner of a 100mL high-pressure reactor, and the reactor was sealed and reacted at 200°C for 12 h. After reaction finishes, cool naturally to room temperature, remove the liquid of upper layer, and the gained solid precipitate is washed to neutrality (pH=7 of washing liquid, the same below) with dehydrated alcohol, then filter through microporous organic filter membrane (0.4 μm, the same below). ) vacuum filtration, and the resulting solid...
Embodiment 2
[0097] Example 2: A 1D-TiO constructed based on the seed growth method 2 Nanorod / 3D-TiO 2 Cubic empty box "crystal plane heterojunction" catalyst, prepared by the following method:
[0098] (1) 3D-TiO 2 Preparation of empty box (same as Example 1).
[0099] (2) 1D-TiO 2 Nanorod / 3D-TiO 2 The preparation of the cubic empty box "crystal plane heterojunction" includes the following steps in sequence:
[0100] (a) 1D-TiO 2 Preparation of nanorod seed solution: Add 5 mL of cetyltrimethylammonium bromide aqueous solution (CTAB, 0.2 mol / L) and 5 mL of tetrabutyl titanate into a beaker, and stir well. Then, add 0.6mL NaBH to it 4 solution (0.1mol / L), the resulting solution was heated in an oven at 28°C for 6h to obtain 1D-TiO 2 Nanorod seed solution.
[0101] (b) 1D-TiO 2 Nanorods in 3D-TiO 2 Growth on the surface of a cubic empty box: Add 5 mL of cetyltrimethylammonium bromide aqueous solution (CTAB, 0.2 mol / L), 50 mL of AgNO to an Erlenmeyer flask 3 solution (0.40 mmol / L)...
Embodiment 3
[0113] Example 3: A 2D-TiO constructed based on the seed growth method 2 Nanosheet / 3D-TiO 2 Cubic empty box "crystal plane heterojunction" catalyst, prepared by the following method:
[0114] (1) 3D-TiO 2 Preparation of empty box (same as Example 1).
[0115] (2) 2D-TiO 2 Nanosheet / 3D-TiO 2 The preparation of the cubic empty box "crystal plane heterojunction" includes the following steps in sequence:
[0116] (a) 2D-TiO 2 Preparation of nanosheet seed solution: Add 20 mL of tetrabutyl titanate and 20 mL of anhydrous ethylene glycol into a beaker in sequence. Then add 0.6 mL of freshly prepared NaBH to it 4 (0.1mol / L) solution, at 25°C, after magnetic stirring, let stand for 3h to obtain 2 Nanosheet seed solution.
[0117] (b) 2D-TiO 2 Nanosheets in 3D-TiO 2 Growth on the surface of a cubic empty box: add 0.4 mL tetrabutyl titanate and 50 mL cetyltrimethylammonium bromide aqueous solution (CTAB) to a beaker, stir until the solution is orange, then add 550 μL ascorbic...
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