Method for in-situ synthesis of monatomic Bi0 bridged TiO2@BiOCl composite photocatalytic material
A technology of composite photocatalysis and in-situ synthesis, applied in the field of photocatalytic materials, can solve the problems of reducing the utilization rate of photogenerated electrons, high recombination rate of photogenerated carriers, and restricting applications, so as to improve photoreduction efficiency, low preparation cost, The effect of enhancing selectivity
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Embodiment example 1
[0024] Add 20mg of P25 to 50mL of 8M NaOH solution, stir magnetically for 0.5h, then transfer to a reaction kettle, heat treat at 150°C for 30h, cool to room temperature naturally, centrifuge the white precipitate, and remove it with 0.1M HCl solution. Wash with ion water until the pH of the solution is 7, and dry at 80° C. for 12 hours to obtain hydrogen titanate nanotubes. Next, 50mg BiCl 3 and 50 μL of concentrated hydrochloric acid were added to 42 mL of absolute ethanol to obtain clear BiCl 3Then add 50 mg of hydrogen titanate nanotubes to the alcohol solution, after ultrasonic dispersion, stir for 1 h, then centrifuge to collect the precipitate and dry it at 80 °C for 1 h to obtain defect-rich hydrogen titanate / BiOCl composite Material. Then, the obtained defect-rich hydrogen titanate / BiOCl composite was placed in a tube furnace and annealed in air to obtain defect-rich TiO 2 @BiOCl heterojunction. Among them, the heating rate of the tube furnace is 5°C / min, the heat...
Embodiment example 2
[0028] Add 50mg of P25 to 50mL of 10M NaOH solution, stir it magnetically for 0.5h, then transfer it to a reaction kettle, heat-treat at 150°C for 48h, cool to room temperature naturally, centrifuge the white precipitate, and remove it with 0.1M HCl solution. Wash with ion water until the pH of the solution is 7, and dry at 80° C. for 12 hours to obtain hydrogen titanate nanotubes. Next, 200mg BiCl 3 and 200 μL of concentrated hydrochloric acid were added to 42 mL of absolute ethanol to obtain clear BiCl 3 Then add 50 mg of hydrogen titanate nanotubes to the alcohol solution, after ultrasonic dispersion, stir for 1 h, then centrifuge to collect the precipitate and dry it at 80 °C for 1 h to obtain defect-rich hydrogen titanate / BiOCl composite Material. Then, the obtained defect-rich hydrogen titanate / BiOCl composite was placed in a tube furnace and annealed in air to obtain defect-rich TiO 2 @BiOCl heterojunction. Among them, the heating rate of the tube furnace is 7°C / min...
Embodiment example 3
[0032] Add 70mg of P25 to 50mL of 12M NaOH solution, stir it magnetically for 0.5h, then transfer it to a reaction kettle, heat-treat at 150°C for 50h, cool to room temperature naturally, centrifuge the white precipitate, and remove it with 0.1M HCl solution. Wash with ion water until the pH of the solution is 7, and dry at 80° C. for 12 hours to obtain hydrogen titanate nanotubes. Next, 300mg BiCl 3 and 300 μL of concentrated hydrochloric acid were added to 42 mL of absolute ethanol to obtain clear BiCl 3 Then add 50 mg of hydrogen titanate nanotubes to the alcohol solution, after ultrasonic dispersion, stir for 1 h, then centrifuge to collect the precipitate and dry it at 80 °C for 1 h to obtain defect-rich hydrogen titanate / BiOCl composite Material. Then, the obtained defect-rich hydrogen titanate / BiOCl composite was placed in a tube furnace and annealed in air to obtain defect-rich TiO 2 @BiOCl heterojunction. Among them, the heating rate of the tube furnace is 10°C / mi...
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