Construction method of phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst

A nano-photocatalyst and acidifying carbon nanotube technology, applied in the field of photocatalyst construction, can solve problems such as poor activity, and achieve the effects of promoting separation, mild reaction conditions and improving effect

Inactive Publication Date: 2014-12-24
HEILONGJIANG UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of poor activity of the existing carbon nanotube and titanium dioxide composite photocatalyst, and to provide a method for constructing phosphoric acid functionalized carbon nanotube-titanium dioxide composite nanophotocatalyst

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  • Construction method of phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst
  • Construction method of phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst
  • Construction method of phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst

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specific Embodiment approach 1

[0022] Specific implementation mode 1: The construction method of phosphoric acid functionalized carbon nanotube-titanium dioxide composite nano photocatalyst in this embodiment is carried out according to the following steps:

[0023] 1. Add carbon nanotubes to concentrated nitric acid, reflux at 120°C to 140°C for 4 to 8 hours, centrifuge, wash, and dry to obtain acidified carbon nanotubes;

[0024] 2. Add the acidified carbon nanotubes to the phosphoric acid aqueous solution with a concentration of 0.1mol / L~1.0mol / L, stir for 20min~60min, ultrasonic for 30min~60min, then centrifuge, wash, dry, roast and grind to obtain phosphoric acid functionalized carbon nanotubes;

[0025] In step 2, the mass ratio of the acidified carbon nanotubes to the aqueous phosphoric acid solution is 1: 20 to 30;

[0026] 3. Add 0.05 to 0.5 parts by mass of phosphoric acid functionalized carbon nanotubes to 40 to 60 parts by mass of butyl titanate, and then repeat the order of stirring for 10 to ...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the mass fraction of concentrated nitric acid described in step one is 65%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the reflux is carried out at 130° C. for 5 hours. Others are different from the first or second specific embodiment.

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Abstract

The invention discloses a construction method of a phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst, and relates to a construction method of a photocatalyst. The construction method provided by the invention solves the technical problem that the activity of the existing carbon nanometer pipe and titanium dioxide composite photocatalyst is poor. The method comprises the following steps of: firstly, preparing a phosphoric acid functionalized carbon nanometer pipe; secondly, adding the phosphoric acid functionalized carbon nanometer pipe in butyl titanate, then adding a mixed liquid in toluene, and obtaining an organic phase; and thirdly, placing the organic phase in a reaction tank, then placing the reaction tank in a high pressure reaction kettle with distilled water, reacting, cooling to the room temperature, taking a paste body in the reaction tank, distilling the paste body, drying, grinding, and obtaining the phosphoric acid functionalized carbon nanometer pipe-titanium dioxide composite nanometer photocatalyst. The construction method provided by the invention utilizes phosphoric acid to realize functionalization on the carbon nanometer pipe, improves the oxygen adsorption capacity of the carbon nanometer pipe, and further enhances the capacity of promoting a photon-generated carrier to be separated and react of the carbon nanometer pipe in a compound system. The construction method provided by the invention belongs to the field of preparation of photocatalysts.

Description

technical field [0001] The invention relates to a construction method of a photocatalyst. Background technique [0002] Titanium dioxide has always been a research hotspot of photocatalysts because of its strong photocatalytic oxidation ability, non-toxic, cheap, and simple preparation. However, the bottleneck of its high recombination probability of photogenerated carriers severely limits the further improvement of its performance. A lot of work has been done to address this bottleneck, among which carbon-based materials represented by carbon nanotubes have become a hot spot of concern. In recent years, scientific researchers have carried out a lot of work on the composite of carbon nanotubes and titanium dioxide, including the development of synthesis methods and research on the activity mechanism. In the existing research results, although there are many synthetic methods, due to factors such as complex processes, harsh equipment conditions, and poor activity of the obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18A62D3/17A62D101/28
Inventor 井立强李志君何禄美付宏刚
Owner HEILONGJIANG UNIV
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