SnO2 modified fullerene composite material of micro nano structure and preparation method and application thereof

A technology of micro-nano structure and composite material is applied in the field of micro-nano structure fullerene composite material and its preparation, which can solve the problems of limited influence of photoelectric properties, and achieve high-efficiency separation of electrons and holes, high yield and high efficiency. Effects of Electron Excitation and Electron Transfer

Active Publication Date: 2018-11-27
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

However, the current understanding of the ordered self-assembly of fullerene molecules at the nanoscale and the impact of the self-assembled structure on the photoelectric performance is still very limited, and more exploration is needed

Method used

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  • SnO2 modified fullerene composite material of micro nano structure and preparation method and application thereof
  • SnO2 modified fullerene composite material of micro nano structure and preparation method and application thereof
  • SnO2 modified fullerene composite material of micro nano structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1SnO 2 Modified C 60 Preparation of nanotube composites

[0061] (1)C 60 Preparation of nanotubes:

[0062] Choose mesitylene as a good solvent, and isopropanol as a poor solvent; 10mL of 0.5mg / mL C 60 When the mesitylene solution is quickly injected into 40mL of isopropanol with a syringe, due to the better mutual solubility of mesitylene and isopropanol, the C in the mutual solution 60 In supersaturated state, C 60 Molecules start to co-crystallize with mesitylene molecules. It can be observed during this process that the mixed solution immediately becomes turbid, initially rose-colored, and soon gradually turns brown-yellow. After the mixed solution was left to stand for 24 hours, it was centrifuged at a speed of 11k on a high-speed centrifuge, the supernatant was poured off, and the solid precipitate at the bottom was collected. Washed three times with isopropanol and dried overnight in a vacuum oven at 40°C to obtain C 60 Solid powder of nanotubes. ...

Embodiment 2

[0075] Example 2SnO 2 Modified C 60 Study on Photocurrent Properties of Nanotube Composite Materials

[0076] 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 electrolyte is 0.5mol / L Na 2 SO 4 Solution, (300W, λ>420nm) xenon-mercury lamp as a visible light source, plus a bias voltage of 0.3V.

[0077] C prepared in Example 1 of the present invention 60 Nanotube, SnO 2 Modified C 60 Nanotube composites and C 60 The photocurrent diagram of the powder is shown in Figure 7 As shown, using (300W, λ>420nm) xenon-mercury lamp irradiation, electrons in the valence band of the material absorb energy and are excited to the conduction band, generating photogenerated electron-hole pairs. The working electrode is transferred to the Pt sheet electrode to generate a current signal, and the more photogenerated electrons, the stronger t...

Embodiment 3

[0078] Example 3SnO 2 Modified C 60 Photocatalytic properties of nanotube composites

[0079] The SnO prepared in embodiment 1 2 Modified C 60The nanotube composite material has excellent photocatalytic performance on the degradation of methylene blue, rhodamine B, tetracycline hydrochloride and other organic pollutants, and the degradation can reach more than 70% within 2 hours. The photocatalytic degradation of methylene blue is taken as an example to show the SnO 2 Modified C 60 Effect of nanotube composites on degradation of organic pollutants.

[0080] The experimental steps are as follows: take 4mL, 30mg / L methylene blue solution into a vial, and put 3mg of SnO prepared in Example 1 2 Modified C 60 Nanotube composites, C 60 Nanotube or SnO 2 , dispersed into the methylene blue solution above. Then place the vial in the dark for 1 hour to absorb organic pollutants, take samples every 30 minutes, and use a Shimadzu UV-2550 ultraviolet-visible spectrophotometer to...

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Abstract

The invention relates to the field of optical catalysis, and further relates to a SnO2 modified fullerene composite material of a micro nano structure and a preparation method and an application thereof. The composite material comprises fullerene of the micro nano structure and SnO2, wherein the micro nano structure serves as a main body and SnO2 is loaded to the surface of fullerene of the micronano structure. The preparation method comprises the following steps: dispersing fullerene of the micro nano structure in water to obtain a dispersion liquid; and adding a SnO2 precursor, a compelxingagent and a reducer into the dispersion liquid to react under conditions of heating, stirring and refluxing, and cooling the solution and separating the solid to obtain the composite material. The embodiment of the invention also provides the application of the composite material in photocatalytic degradation of organic pollutants. The composite material is novel in structure and excellent in performance. When the composite material is used as a photo catalyst, the energy band structures of SnO2 and fullerene of the micro nano structure are high in matching degree, low in electron-cavity recombination rate, good in quantum efficiency, high in optical utilization ratio and good in photo catalytic activity.

Description

technical field [0001] The present invention relates to the field of photocatalysis, and further relates to SnO 2 Modified fullerene composite material with micro-nano structure and its preparation method and application. Background technique [0002] Semiconductor photocatalysis technology has become a green environmental pollution control technology due to its low energy consumption, low temperature deep reaction, low cost, no secondary pollution, thorough purification, and direct use of solar energy as a light source to drive the reaction. [0003] SnO 2 (Tin dioxide) is a semiconductor with a wide band gap. The band gap and exciton binding energy at room temperature are 3.6eV and 130meV, respectively, and there is almost no absorption in the visible light region, so the utilization rate of light energy is low. Fullerene is a kind of carbon material with good optical properties and quantum properties, which has great application potential in the fields of semiconductor,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14C02F1/30C02F101/30C02F101/38
CPCB01J23/14B01J35/004C02F1/30C02F2101/308C02F2101/38C02F2305/10
Inventor 王春儒吴波柴永强刘丽萍
Owner INST OF CHEM CHINESE ACAD OF SCI
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