Preparation method of graphene quantum dot supported Ag-TiO2 nano array

A technology of graphene quantum dots and nano-arrays, applied in the direction of light water/sewage treatment, etc., can solve problems such as toxicity, unsatisfactory visible light response performance, and complicated preparation process

Inactive Publication Date: 2018-01-16
HEFEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the preparation of TiO in the prior art 2 The visible light response performance of the film is not ideal, the preparation process is complicated, the required chemical reagents are expensive or toxic, etc., providing a graphene quantum dot loaded Ag-TiO 2 A method for preparing nano-arrays, which has low-value raw materials, non-toxicity, and simple preparation process. In TiO 2 Ag nanoparticles and graphene quantum dots are loaded on the nanoarrays, and through the joint action of the two, the TiO 2 Visible light response properties of nanoarrays

Method used

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  • Preparation method of graphene quantum dot supported Ag-TiO2 nano array
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  • Preparation method of graphene quantum dot supported Ag-TiO2 nano array

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Embodiment 1

[0030] A graphene quantum dot supported Ag-TiO 2 The preparation method of nanometer array specifically comprises the following steps:

[0031] The present invention uses FTO conductive glass (1 * 1.5 * 0.21cm) as substrate, and FTO conductive glass is ultrasonically cleaned in acetone and deionized water respectively for 20 minutes, to remove organic pollutants and impurities on the surface of the FTO film, and the cleaned FTO Conductive glass is dried in an atmosphere at 60°C.

[0032] Mix 20 ml of hydrochloric acid, 20 ml of deionized and 0.68 ml of butyl titanate, and after stirring magnetically at room temperature for 30 minutes, transfer the solution to a 50 ml autoclave lined with polytetrafluoroethylene, and place the cleaned FTO conductive glass Tilt in the autoclave, put the autoclave into an oven at 150°C, react for 10 hours, cool to room temperature naturally, take out the sample, wash the sample with deionized water several times, and dry the sample in an oven at...

Embodiment 2

[0039] The steps in this embodiment two are basically the same as those in embodiment one, the difference is:

[0040] Drop 0.5 ml of graphene quantum dot dispersion liquid on the sample surface each time, let it stand for 5 minutes, wait for the dispersion liquid to infiltrate the sample, and then use the spin coating technology to evenly coat the dispersion liquid on the sample surface, and the spin coating rotation speed is 1000 revolutions / min, the coating time was 5 seconds, and then the sample was dried in the atmosphere at 100°C, and the above process was repeated 12 times to obtain graphene quantum dot-loaded Ag-TiO 2 Nanoarrays; samples also formed graphene quantum dots supported on Ag-TiO 2 Nanoarray composite nanomaterials, Ag-TiO modified by 12 graphene quantum dots 2 The number of graphene quantum dots on the nano-array is significantly increased, and the UV-visible absorption spectrum test results of the sample show that, compared with the sample obtained in Ex...

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Abstract

The invention discloses a preparation method of a graphene quantum dot supported Ag-TiO2 nano array. The preparation method comprises the following steps: (a) preparing a TiO2 nano array; (b) preparing an Ag-TiO2 nano array: reducing Ag nano particles (Ag<+>) loaded on the TiO2 nano array prepared in the step (a) by UV rays to obtain the Ag-TiO2 nano array; and (c) preparing a graphene quantum dotsupported Ag-TiO2 nano array: evenly painting a graphene quantum dot dispersion liquid onto the surface of the Ag-TiO2 nano array prepared in the step (b) by a spinning coating technology, and dryingto obtain the graphene quantum dot supported Ag-TiO2 nano array. The raw materials are cheap and nontoxic, the preparation process is simple, Ag nano particles and graphene quantum dots are loaded onTiO2 nano arrays, and through the cooperation of Ag nano particles and graphene quantum dots, the visible light responsive performance of TiO2 nano array is enhanced.

Description

technical field [0001] The invention relates to a graphene quantum dot loaded Ag-TiO 2 The invention relates to a method for preparing a nano array, which belongs to the technical field of nano composite materials. Background technique [0002] At present, the energy crisis and environmental issues have become two key issues restricting the world's economic and social development. Photocatalytic degradation technology is expected to become an effective way to solve energy and environmental problems. Using solar photolysis technology to convert solar energy into clean hydrogen is expected to solve the energy crisis caused by the depletion of fossil energy; in addition, through photocatalytic degradation technology It can degrade toxic organic pollutants and will become an effective way to solve environmental problems. Energy and environmental issues are two major issues facing the world today. Therefore, the development and utilization of clean renewable energy (such as: so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50C02F1/30
Inventor 吕建国赵敏祝钱钱曾争汪文豪
Owner HEFEI NORMAL UNIV
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