Preparation of anatase-phase titanium dioxide photocatalyst and application of anatase-phase titanium dioxide photocatalyst in synthesis of xylonic acid by photocatalytic oxidation of xylose
A titanium dioxide, anatase phase technology, applied in the field of catalysis, can solve the problems of harsh reaction conditions, cumbersome microbial population control, low yield, etc., and achieves the effects of good stability, good application prospects and quick results.
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Embodiment 1
[0045] (1) Mix 1.0, 1.5, 2.0, 2.5, 3.0 g of sodium carboxymethylcellulose with 100.0 mL of water respectively, and dissolve the gel substance under mechanical stirring;
[0046] (2) Add 2.0 mL of tetrabutyl titanate dropwise to the solution obtained in step (1) under stirring, and stir until the whole system is uniformly mixed;
[0047] (3) The gel solution obtained in step (2) was first frozen and solidified with liquid nitrogen, and then freeze-dried in a freeze-drying machine. The freeze-drying time was 24.0 h, and the freeze-drying temperature was -50°C. The catalyst was calcined in the nitrogen of a formula furnace under the condition of 800.0° C. for 1.0 h to obtain the catalyst.
Embodiment 2
[0049] (1) 3.0g sodium carboxymethylcellulose is mixed with 100.0mL of water, and the gel substance is dissolved under mechanical stirring;
[0050] (2) Add 2.0 mL of tetrabutyl titanate dropwise to the solution obtained in step (1) under stirring, and stir until the whole system is uniformly mixed;
[0051](3) The gel solution obtained in step (2) was first frozen and solidified with liquid nitrogen, and then freeze-dried in a freeze-drying machine. The freeze-drying time was 24.0 h, and the freeze-drying temperature was -50°C. The catalyst was calcined in the nitrogen atmosphere of the furnace under the conditions of 400.0°C, 500.0°C, 600.0°C, 700.0°C, and 800.0°C for 1.0 h to obtain the catalyst.
Embodiment 3
[0053] (1) 3.0g sodium carboxymethylcellulose is mixed with 100.0mL of water, and the gel substance is dissolved under mechanical stirring;
[0054] (2) Add 1.0, 1.5, 2.0, 2.5, 3.0 mL of tetrabutyl titanate dropwise under stirring to the solution obtained in step (1), and stir until the whole system is evenly mixed;
[0055] (3) The gel solution obtained in step (2) was first frozen and solidified with liquid nitrogen, and then freeze-dried in a freeze-drying machine. The freeze-drying time was 24.0 h, and the freeze-drying temperature was -50°C. The catalyst was calcined in the nitrogen of a formula furnace under the condition of 800.0° C. for 1.0 h to obtain the catalyst.
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