Composite graphite phase carbon nitride heterojunction photocatalyst preparation method
A photocatalyst, phase carbon nitride technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of limited surface area, low light collection efficiency, and unsatisfactory photocatalytic water splitting activity for hydrogen production , to achieve the effect of common raw materials, increased diffusion range, and excellent photocatalytic performance
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Embodiment 1
[0018] (1) Preparation of g-C by thermal polymerization 3 N 4 . Put urea (50 g) in a covered alumina crucible, put it into a muffle furnace, heat the crucible to 250 °C for 1 h, 350 °C for 2 h, and finally 550 °C for 3 h, the heating rate 2°C / min. The obtained yellow powder was washed with nitric acid (0.1 mol / L) and distilled water to wash away any residual alkaline substances (such as ammonia) adsorbed on the surface of the product, and then the product was dried in an oven at 50 °C for 12 hours to obtain g-C 3 N 4 Nanosheets.
[0019] (2) Ag:ZnIn 2 S 4 / g -C 3 N 4 Synthesis of heterojunction photocatalysts. 148.5 mg g-C was ultrasonically 3 N 4 Disperse in 50 mL of deionized water, then add 71 μL of 0.05 mmol / mL zinc acetate solution, 71 μL of 0.1 mmol / mL indium acetate solution, 26 μL of 0.8 mmol / L silver nitrate solution, 47 μL of 0.01 mmol / mL L-half Cystine and sonicated for 10 min. The mixture was transferred to a 100 mL polytetrafluoroethylene-lined stainl...
Embodiment 2
[0021] As described in Example 1, the difference is that 354 μL of 0.05 mmol / mL zinc acetate solution, 354 μL of 0.1 mmol / mL indium acetate solution, 130 μL of 0.8 mmol / L silver nitrate solution, and 236 μL of 0.01 mmol / mL L-cysteine, 708 μL 0.1 mmol / mL thioacetamide solution, the final catalyst contains 5 wt% Ag:ZnIn 2 S 4 5 wt% of Ag:ZnIn 2 S 4 / g -C 3 N 4 .
Embodiment 3
[0023] As described in Example 1, the difference is that 708 μL of 0.05 mmol / mL zinc acetate solution, 708 μL of 0.1 mmol / mL indium acetate solution, 261 μL of 0.8 mmol / L silver nitrate solution, and 472 μL of 0.01 mmol / mL L-cysteine, 1416 μL 0.1 mmol / mL thioacetamide solution, the final catalyst contains 10 wt% Ag:ZnIn 2 S 4 10 wt% Ag:ZnIn 2 S 4 / g -C 3 N 4 .
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