Photocatalytic material based on metal-semiconductor composite structure and preparation method and magnetic field auxiliary application of photocatalytic material
A technology of photocatalytic materials and composite structures, applied in chemical instruments and methods, non-metal elements, physical/chemical process catalysts, etc., to achieve efficient photocatalytic water splitting effects, improve performance, and promote separation effects
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Embodiment 1
[0041] Preparation of photocatalytic materials with Au nanorod-semiconductor CdS core-shell structure:
[0042] (1) Synthesis of Au nanorods:
[0043] a Place 90 microliters of chloroauric acid solution (10g / L) in 10ml of cetyltrimethylammonium bromide CTAB (1mol / L), and add 2 mg of sodium borohydride to reduce it to form Au seed crystals;
[0044] b Provide 1000ml of 1mol / L CTAB solution, add 1.92ml of silver nitrate solution (0.1mol / L), 4ml of chloroauric acid, 0.512ml of ascorbic acid (0.1mol / L) and 320 microliters of Au seed crystal, by adding the amount of ascorbic acid Adjust the morphology of Au nanoparticles and place them at room temperature for 12 hours to obtain Au nanorods;
[0045] (2) Synthesis of Au nanorod-semiconductor CdS core-shell structure photocatalytic material:
[0046]According to the ratio of cadmium thiobenzyl: the mass ratio of Au nanorods is 10:1, cadmium thiobenzyl is added to the CTAB solution of Au nanorods (the concentration of CTAB solution ...
Embodiment 2
[0050] Preparation of photocatalytic materials with Au nanoparticles-semiconductor CdS core-shell structure:
[0051] (1) Synthesis of Au nanoparticles:
[0052] a Place 90 microliters of chloroauric acid solution (10g / L) in 10ml of cetyltrimethylammonium bromide CTAB (1mol / L), and add 2 mg of sodium borohydride to reduce it to form Au seed crystals;
[0053] b Provide 1000ml of 1mol / L CTAB solution, add 1.92ml of silver nitrate solution (0.1mol / L), 4ml of chloroauric acid, 0.512ml of ascorbic acid (0.2mol / L) and 320 microliters of Au seed crystal, by adding the amount of ascorbic acid Adjust the morphology of Au nanoparticles and place them at room temperature for 12 hours to obtain Au nanoparticles;
[0054] (2) Synthesis of Au nanoparticles-semiconductor CdS core-shell structure photocatalytic material:
[0055] According to the ratio of cadmium thiobenzyl: the mass ratio of Au nanoparticles is 10:1, cadmium thiobenzyl is added to the Au nanorod CTAB solution (the concent...
Embodiment 3
[0059] Preparation of silver nanowire-semiconductor CdS photocatalytic material:
[0060] According to the ratio of cadmium thiobenzyl: the mass ratio of silver nanowires is 10:1, cadmium thiobenzyl is added to the silver nanowire CTAB solution (the concentration of CTAB solution is 0.1mol / L), and 20 microliters Silver nitrate solution (concentration 0.1mol / L), hydrothermal reaction at 140°C for 3 hours, so that the semiconductor photocatalyst is evenly coated on the metal surface, and the synthetic silver nanowire-semiconductor CdS photocatalytic material is obtained.
[0061] Application of silver nanowire-semiconductor CdS photocatalytic material:
[0062] Disperse 1mg of silver nanowire-semiconductor CdS photocatalytic material in water, add sodium sulfate and sodium sulfite, under the magnetic field strength 0.005-0.2T, rotation speed 100-350rpm, light intensity 60-180mW / cm 2 The photocatalytic water splitting reaction assisted by a magnetic field was carried out under a...
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