Preparation method of titanium dioxide-graphene composite nano paper
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A graphene composite and titanium dioxide technology, applied in the direction of titanium dioxide, graphene, chemical instruments and methods, etc., can solve the problems of reduced photocatalytic activity and application restrictions, and achieve the effects of promoting application, low cost and superior performance
Inactive Publication Date: 2014-12-17
UNIV OF JINAN
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When TiO 2 After the nanobelt is excited by light, the electrons separated from the holes will be excited from the valence band to the conduction band. However, due to the TiO 2 Due to the perfect surface structure and single phase structure of the nanobelt, most of the electrons will return to the valence band to recombine with holes, resulting in a decrease in photocatalytic activity.
Its application in photocatalysis is limited
Method used
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Embodiment 1
[0031] A titanium dioxide-graphene composite nano paper, the main components of which are titanium dioxide nanobelts and graphene or titanium dioxide nanobelts, graphene and additives.
[0032] The preparation method of the above titanium dioxide-graphene composite nano paper. It mainly includes synthesis-composite-dispersion-suction filtration-drying and other processes. Concrete preparation process is as follows:
[0033] (1) Preparation of titanium dioxide nanoribbons
[0034] Weigh 0.5 ~ 1g titanium dioxide powder to place in 30 ~ 50 mL KOH (10 ~ 15 mol?L -1 ) solution in a polytetrafluoroethylene-lined stainless steel reactor, after ultrasonic treatment for 10 min, close and tighten the reactor, and react in a preheated oven at 170°C to 220°C for 20 to 60 hours. After the reaction was completed, it was naturally cooled to room temperature, and the product in the kettle was poured out, washed with ultrapure water until neutral to obtain potassium titanate nanobelts. ...
Embodiment 2
[0043] The preparation steps were the same as in Example 1, except that 1 g of titanium dioxide-graphene composite nanomaterial was weighed and placed in 1 L of water, and ultrasonically dispersed for 1 h to form a titanium dioxide-graphene suspension.
Embodiment 3
[0045] The preparation steps were the same as in Example 1, except that 0.1 g of titanium dioxide-graphene composite nanomaterial was weighed and placed in 1 L of water, and magnetically stirred and dispersed for 1 h to form a titanium dioxide-graphene suspension.
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Abstract
The invention discloses a preparation method of a piece of titanium dioxide-graphene composite nano paper. The titanium dioxide-graphene composite nano paper mainly comprises a titanium dioxide nano zone and graphene, or a titanium dioxide nano zone, graphene and additives. The preparation method of the titanium dioxide-graphene composite nano paper mainly comprises the following procedures of synthesizing, compounding, dispersing, suction filtering, drying and the like. Compared with the ordinary nano granules or nano films, the titanium dioxide-graphene composite nano paper is more excellent in performance, simple in manufacturing method and lower in cost. Due to the introduction of the graphene, the nano paper has good conductivity, can effectively solve the problem that electrons are compounded with cavities when being excited, and improves the photocatalysis efficiency. The composite nano paper has important application prospects in high-tech fields of photocatalysis, sensors, electronic devices and the like. The composite nano paper has the advantages of reasonable design, simple process, non-toxicity, harmlessness, low price and the like, is easy to operate and can be directly cut.
Description
technical field [0001] The invention relates to a preparation method of titanium dioxide-graphene composite nano paper, which belongs to the field of preparation of composite nano materials. Background technique [0002] Titanium dioxide (TiO 2 ) is an important inorganic semiconductor functional material, due to its moisture sensitivity, gas sensitivity, chemical inertness, photoelectric conversion, dielectric effect, good biocompatibility, strong oxidation ability, chemical corrosion and photocorrosion resistance, superior Photocatalytic performance and other characteristics, and non-toxic, harmless, easy to prepare, low price, in energy conversion, sensors, dielectric materials, self-cleaning materials, solar cells, coatings, cosmetics, catalysts, fillers, photocatalytic degradation of pollutants And other high-tech fields have important application prospects, and have become one of the hot research topics at home and abroad. [0003] At present, titanium dioxide in pra...
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