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Preparation method of graphene/titania composite material

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of long synthesis time, toxic reducing agents, and many preparation steps, and achieve easy implementation and equipment. Simple, easy-to-process effects

Inactive Publication Date: 2012-07-25
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technology disclosed in the above documents has defects or deficiencies such as long synthesis time, many preparation steps, and the need for toxic reducing agents

Method used

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  • Preparation method of graphene/titania composite material
  • Preparation method of graphene/titania composite material
  • Preparation method of graphene/titania composite material

Examples

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Embodiment 1

[0031] A graphene / TiO 2 A method for preparing a composite material, comprising the steps of:

[0032] (1) Preparation of graphene / TiO 2 Composite material precursor solution: prepare solution A, slowly add 1 g of tetrabutyl titanate into 10 mL of isopropanol in an ice-water bath, with a concentration of 0.1 g / mL. To prepare solution B, add 0.2 g of graphene oxide prepared by the Hummers method to a mixture of 1.3 mL of deionized water and 10.4 mL of isopropanol. After the obtained solution B was added dropwise to solution A while stirring, 0.4 mL of dilute nitric acid (37%) and 0.29 g of urea were added to the above mixed solution to obtain the precursor solution.

[0033] (2) Heating and stirring the expelling solution, steaming the solution until gelatinous, and then treating it in a microwave oven with a power of 0.7 kW for 32 minutes to obtain a graphene / titanium dioxide composite material with excellent photocatalytic properties.

[0034] The TiO in the composite was ...

Embodiment 2

[0036] A graphene / TiO 2 A method for preparing a composite material, comprising the steps of:

[0037] (1) Preparation of graphene / TiO 2 Composite material precursor solution: prepare solution A, slowly add 2 g of tetrabutyl titanate into 5 mL of isopropanol in an ice-water bath, with a concentration of 0.4 g / mL. To prepare solution B, add 0.7 g of graphene oxide prepared by the Hummers method to a mixture of 2.0 mL of deionized water and 15.6 mL of isopropanol. After the obtained solution B was added dropwise to solution A while stirring, 0.8 mL of dilute nitric acid (37%) and 0.58 g of urea were added to the above mixed solution to obtain the precursor solution.

[0038] (2) Heat and stir the expelling solution, steam the solution until it becomes gelatinous, and then treat it in a microwave oven with a power of 1.2 kW for 20 minutes to obtain a graphene / titanium dioxide composite material with excellent photocatalytic properties.

Embodiment 3

[0040] A graphene / TiO 2 A method for preparing a composite material, comprising the steps of:

[0041] (1) Preparation of graphene / TiO 2 Composite material precursor solution: prepare solution A, slowly add 2 g of tetrabutyl titanate into 5 mL of isopropanol in an ice-water bath, with a concentration of 0.4 g / mL. To prepare solution B, add 0.82 g graphene oxide (prepared by Hummers method) to a mixture of 0.3 mL deionized water and 4.4 mL isopropanol. After the obtained solution B was added dropwise to solution A while stirring, 0.8 mL of dilute nitric acid (37%) and 0.58 g of urea were added to the above mixed solution to obtain the precursor solution.

[0042] (2) Heat and stir the expelling solution, steam the solution until it becomes gelatinous, and then treat it in a microwave oven with a power of 0.9 kW for 25 minutes to obtain a graphene / titanium dioxide composite material with excellent photocatalytic properties.

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Abstract

The invention discloses a preparation method of a graphene / titania composite material, which comprises the steps of preparing a precursor solution, and heating and stirring the precursor solution and the like. The preparation method of the graphene / titania composite material has the beneficial effects: the process is simple, the implementation is easy, and the opportunity of introducing impurities is reduced, so that the purity of a product can not be affected. The preparation process is mild without protection of a special atmosphere, the required equipment is simple, the reaction speed is quick, and the preparation method is suitable for mass production. Graphene oxide can be reduced by microwave heating, and a toxic reductant is not used.

Description

technical field [0001] The invention relates to the technical field of inorganic synthesis of photocatalytic functional materials, in particular to a preparation method of a graphene / titanium dioxide composite material. Background technique [0002] Graphene has attracted extensive attention due to its excellent optical and electrical properties. Moreover, it can be used as a performance-enhancing phase to compound with other compounds to prepare composite materials with specific properties. By combining graphene with semiconductor nanomaterials, when the material is irradiated by light, photogenerated electrons can be injected into graphene, effectively preventing the recombination of photogenerated electrons and holes, thereby improving photocatalytic efficiency and significantly improving the performance of photocatalytic materials. It can be used in fields such as solar energy, lithium battery electrode materials and sewage treatment. [0003] Titanium dioxide (TiO 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/30C02F1/32
CPCY02W10/37
Inventor 蒲锡鹏张大凤高岩岩
Owner LIAOCHENG UNIV
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