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Composite photocatalyst and preparation method and application thereof

A technology of catalyst and composite light, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of complex preparation methods and poor dispersion, and achieve simple preparation methods, high defect density, and large concentration Effect

Active Publication Date: 2018-12-25
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material is in powder form, and is mainly used for adsorption materials, and is not used for photocatalytic materials. Its preparation method is complicated, and titanium dioxide powder is used as raw material, and its dispersibility is poor.

Method used

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  • Composite photocatalyst and preparation method and application thereof
  • Composite photocatalyst and preparation method and application thereof
  • Composite photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] A composite photocatalyst comprising:

[0091]

[0092] The preparation method of described composite photocatalyst comprises the steps:

[0093] Add 1.5g of sodium dodecylbenzenesulfonate and 0.25g of sodium hexametaphosphate to the aqueous dispersion of 50g of exfoliated graphene and the aqueous solution of 500g of nano-titanium dioxide, after stirring, ultrasonic and high-pressure homogenizer treatment , to obtain graphene aqueous dispersion A and TiO 2 The pre-dispersion B; then slowly add the dispersion A to the dispersion B, after stirring, ultrasonic and high-pressure homogenizer to obtain the mixed dispersion C; finally add the weighed 250g 2wt% nanofiber Aqueous plain solution, constant volume 1kg, after stirring, ultrasonic and ball milling treatment at room temperature, and finally get off-white homogeneous TiO 2 Aqueous dispersion of graphene / nanocellulose ternary composite catalyst.

Embodiment 2

[0095] A composite photocatalyst comprising:

[0096]

[0097] The preparation method of described composite photocatalyst comprises the steps:

[0098] 0.5g of polyvinylpyrrolidone and 0.25g of sodium hexametaphosphate were added to the aqueous dispersion of 50g of exfoliated graphene and the aqueous solution of 500g of nano-titanium dioxide, and after stirring, ultrasonic and high-pressure homogenizer treatment, graphene was obtained respectively. Aqueous dispersion A and TiO 2 The pre-dispersion B; then slowly add the dispersion A to the dispersion B, after stirring, ultrasonic and high-pressure homogenizer to obtain the mixed dispersion C; finally add the weighed 250g 2wt% nanofiber Aqueous plain solution, constant volume 1kg, after stirring, ultrasonic and ball milling treatment at room temperature, and finally get off-white homogeneous TiO 2 Aqueous dispersion of graphene / nanocellulose ternary composite catalyst.

Embodiment 3

[0100] A composite photocatalyst comprising:

[0101]

[0102] The preparation method of described composite photocatalyst comprises the steps:

[0103] 0.83g of polyvinylpyrrolidone and 0.5g of sodium hexametaphosphate were added to the aqueous dispersion of 83g of exfoliated graphene and the aqueous solution of 334g of nano-titanium dioxide, and after stirring, ultrasonic and high-pressure homogenizer treatment, graphene was obtained respectively. Aqueous dispersion A and TiO 2 The pre-dispersion B; then slowly add the dispersion A to the dispersion B, after stirring, ultrasonic and high-pressure homogenizer to obtain the mixed dispersion C; finally add the weighed 400g 2.5wt% nano Cellulose aqueous solution, constant volume 1kg, after stirring, ultrasonication and ball milling at room temperature, finally get off-white uniform TiO 2 Aqueous dispersion of graphene / nanocellulose ternary composite catalyst.

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Abstract

The invention provides a composite photocatalyst and a preparation method and application thereof. The composite photocatalyst comprises a solvent and nanometer titania, a carbon material and nano-crystalline cellulose which dispersed in the solvent, and the nano-crystalline cellulose and the nanometer titania are interspersed in the carbon material. The preparation method includes the steps of 1), mixing a carbon material dispersion solution with a nanometer titania dispersion solution to obtain a mixture; 2), mixing the mixture with a nano-crystalline cellulose solution to obtain the composite photocatalyst. The composite photocatalyst is good in photocatalytic effect, simple in preparation method and widely applicable to the field of environmental restoration.

Description

technical field [0001] The invention belongs to the technical field of catalysts and relates to a composite photocatalyst and its preparation method and application, in particular to a titanium dioxide / carbon material / cellulose composite photocatalyst and its preparation method and application. Background technique [0002] In recent years, with the continuous advancement of industrialization, environmental pollution has become a major problem facing human society that needs to be solved urgently. Among many materials for controlling environmental pollution, TiO 2 Because of its good chemical stability, non-toxicity, low price and high photocatalytic activity, it has become an ideal photocatalyst and has been widely concerned and studied by people. However, TiO 2 There are also key technical problems such as low quantum efficiency, low utilization rate of solar energy, small particles and easy agglomeration, and difficulty in separation and recovery, which greatly restrict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01D53/86B01D53/44C09D5/16C09D7/61
CPCB01D53/8687C09D5/1618C09D7/61B01J21/18B01D2257/708B01J35/39
Inventor 刘亚萍郑应福张金柱梁蒙蒙
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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