Treatment method of organic dye in waste water
A treatment method and technology of organic dyes, applied in water/sewage treatment, adsorption water/sewage treatment, light water/sewage treatment, etc., can solve the problem of poor adsorption capacity, low photocatalytic degradation rate of organic dyes, and poor regeneration ability of adsorption materials and other problems, to achieve the effect of reducing energy gap difference, realizing repeated use, and easy regeneration
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[0022]
[0023] The sponge is soaked in the graphene oxide suspension emulsion to obtain a graphene oxide composite sponge; the graphene oxide composite sponge is placed in a mixture of nano-level photocatalyst and reducing agent to obtain a photocatalyst modified graphene composite sponge hydrogel ; The photocatalyst modified graphene composite sponge hydrogel is washed and dried to prepare a photocatalyst modified graphene composite sponge.
[0024] In the present invention, the sponge may be one of polyurethane sponge, melamine sponge, polyester sponge, polyether sponge or polyvinyl alcohol sponge. Preferably, the sponge is a polyurethane sponge or a melamine sponge. According to a specific embodiment of the present invention, the sponge is a polyurethane sponge. The volume of the sponge is 20~500cm 3 . Preferably, the volume of the sponge is 100~400cm 3 . More preferably, the volume of the sponge is 150~300cm 3 . The shape of the sponge can be a cuboid or a cube. Prefera...
Example Embodiment
[0045] Example 1
[0046] The polyurethane sponge with a volume of 10cm×10cm×2cm was first placed in absolute ethanol for ultrasonic cleaning, and then placed in deionized water for ultrasonic cleaning. The polyurethane sponge after ultrasonic cleaning was soaked and washed with distilled water, and dried at 65°C. The dried polyurethane sponge is soaked in a graphene oxide suspension emulsion with a concentration of 2 mg / ml, squeezed and soaked for several times, and then centrifuged to obtain a graphene oxide composite sponge. The graphene oxide composite sponge is placed in a mixture of nano-titanium dioxide and ascorbic acid (the concentration of nano-titanium dioxide is 0.2mg / ml, the concentration of ascorbic acid is 5mg / ml), and the reaction is carried out at 80℃ for 12h to obtain photocatalytically modified graphene Composite sponge hydrogel. The photocatalyst modified graphene composite sponge hydrogel was immersed and washed in 1 vol% ethanol aqueous solution for 24 hou...
Example Embodiment
[0049] Example 2
[0050] The polyurethane sponge with a volume of 10cm×10cm×2cm was first placed in absolute ethanol for ultrasonic cleaning, and then placed in deionized water for ultrasonic cleaning. The polyurethane sponge after ultrasonic cleaning was soaked and washed with distilled water, and dried at 65°C. The dried polyurethane sponge is soaked in a graphene oxide suspension emulsion with a concentration of 4 mg / ml, squeezed and soaked several times, and then centrifuged to obtain a graphene oxide composite sponge. The graphene oxide composite sponge is placed in a mixture of nano-titanium dioxide and ascorbic acid (the concentration of nano-titanium dioxide is 0.2mg / ml, the concentration of ascorbic acid is 5mg / ml), and the reaction is carried out at 80℃ for 12h to obtain photocatalytically modified graphene Composite sponge hydrogel. The photocatalyst modified graphene composite sponge hydrogel was immersed and washed in 1 vol% ethanol aqueous solution for 24 hours,...
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