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Carboxylated metal fullerene modified titanium dioxide compound material, preparation method and application thereof

A kind of metallofullerene, composite material technology

Active Publication Date: 2018-06-05
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To solve the existing TiO 2 Photocatalytic materials have low light absorption efficiency, low utilization rate of light energy, and fast electron-hole recombination. The purpose of the present invention is to provide a novel carboxylated metal fullerene derivative modified TiO 2 Composite materials and their preparation methods and applications

Method used

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  • Carboxylated metal fullerene modified titanium dioxide compound material, preparation method and application thereof
  • Carboxylated metal fullerene modified titanium dioxide compound material, preparation method and application thereof
  • Carboxylated metal fullerene modified titanium dioxide compound material, preparation method and application thereof

Examples

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Embodiment 1

[0049] Example 1 Controllable Preparation of Nanocomposites of Carboxylated Metal Fullerene Derivatives Modified Flake Titanium Dioxide

[0050] (1) Flake TiO 2 Preparation of nanomaterials:

[0051] Mix 0.07mol tetrabutyl titanate with 5ml (40wt%) hydrofluoric acid to control the pH to obtain a mixed solution, put the mixed solution in a 100ml reactor and keep it warm at 200°C for 20h, cool down after the reaction to obtain a solution containing flaky titanium dioxide , the solution was centrifugally filtered, washed three times with deionized water, and then washed three times with absolute ethanol, and dried overnight in an oven at 80°C to obtain 0.068mol of flaky titanium dioxide solid powder.

[0052] (2) Preparation of carboxylated metal fullerene derivatives according to the literature "Cai, T.; Xu, L.; Shu, C.; Champion, H.A.; Reid, J.E.; Anklin, C.; Anderson, M.R.; Gibson, H.W.; Dorn, H.C., Selective Formation of a Symmetric Sc 3 N@C 78 Bisadduct: Adduct Docking C...

Embodiment 2

[0066] Below in conjunction with the accompanying drawings, the specific embodiment of the present invention will be described in detail by taking photocatalytic nitrobenzene reduction as an example, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment. The reduction has excellent photocatalytic performance. The inventors also conducted experiments on the following various nitro compounds according to the same photocatalytic method, which can achieve a conversion rate of more than 65% and a selectivity of more than 99%.

[0067]

[0068] Research on the application of photocatalytic nitrobenzene reduction of nano-composite materials modified by carboxylated metal fullerene derivatives of titanium dioxide flakes, the steps are as follows:

[0069]

[0070] Mix 0.05mmol nitrobenzene, 15mg composite material catalyst and 2.225ml isopropanol and 0.025ml water as solvent, then add 0.4mmol formic acid and stir ...

Embodiment 3

[0080] Study on the photocurrent properties of nanocomposite materials modified with carboxylated metal fullerene derivatives of titanium dioxide flakes, the steps are as follows:

[0081] (1) Preparation of sheet-like titanium dioxide / FTO electrode sheets modified by carboxylated metal fullerene derivatives:

[0082] 3 mg of carboxylated metal fullerene derivatives modified flake TiO 2 The composite material was mixed with 0.5ml ethanol, after ultrasonication for 30min, continue to stir evenly, take 10μl of the mixed solution and drop-coat it on the surface of the cleaned FTO glass, then put the glass piece into an oven, and keep it warm at 110°C for 12h.

[0083] (2) Photocurrent measurement of metallofullerene-modified flake titanium dioxide nanocomposites:

[0084] The photocurrent is tested by a three-electrode system, with Pt sheet as the counter electrode, calomel as the reference electrode, and the prepared sample electrode as the working electrode, and the electrolyt...

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Abstract

The embodiment of the invention relates to a carboxylated metal fullerene modified titanium dioxide compound material, a preparation method and application thereof. The compound material is prepared from raw materials including carboxylated metal fullerene derivatives and a TiO2 carrying hydroxyl on the surface, wherein the carboxylated metal fullerene derivatives and the TiO2 carrying hydroxyl onthe surface are linked through an ester bond; and the ester bond is formed by-COOH in the carboxylated metal fullerene derivatives and-OH on the surface of the titanium dioxide. The carboxylated metal fullerene derivatives have a stable structure, can be characteristically absorbed in a visible region, has a wide light response range and a level structure having a high matching rate with TiO2, can be used for simply, conveniently and efficiently realizing separation of photo-induced electron-electron hole pairs by modifying the surface of titanium dioxide with the carboxylated metal fullerenederivatives, and has strong operability.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a composite material modified with carboxylated metal fullerene derivatives and titanium dioxide, a preparation method and application thereof. Background technique [0002] Titanium dioxide (TiO 2 ) has become the most ideal photocatalytic material for environmental governance because of its strong oxidative properties, non-toxicity, light and chemical stability, and low cost. TiO 2 Can quickly and completely oxidize pollutants to CO 2 and H 2 O and other harmless substances can realize the safe, efficient and selective capture and degradation of micro-pollutants in water. It is because of these excellent properties that TiO 2 It is widely used in the degradation of hydrocarbons, halogenated substances, hydroxy acids, surfactants, dyes, nitrogen-containing organic compounds, organophosphorus pesticides, etc. in water. [0003] However, there are two key technical difficulties...

Claims

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Application Information

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IPC IPC(8): B01J31/38C07C209/80C07C211/46C07C211/47C07C211/52C07C221/00C07C223/06C07C213/02C07C215/76
CPCC07C209/80C07C213/02C07C221/00B01J31/38B01J2231/641B01J35/39C07C211/47C07C211/52C07C223/06C07C215/76
Inventor 王春儒吴波刘丽萍
Owner INST OF CHEM CHINESE ACAD OF SCI
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