Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application

A graded, mesoporous technology, applied in the field of solar cell materials, can solve the problems of harsh experimental conditions, complex synthesis methods, etc., and achieve the effect of simple synthesis process, large specific surface area, and good scattering effect.

Inactive Publication Date: 2016-02-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the general hierarchical TiO 2 The preparation of requires harsher experimental conditions or more complicated synthesis methods, while using MOF as a precursor to synthesize mesoporous TiO with hierarchical structure 2 The method is relatively simple, but so far there is no relevant report on the preparation of photoanode materials for dye-sensitized solar cells using MOF as a precursor.

Method used

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  • Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application
  • Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application
  • Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A Hierarchical Mesoporous TiO Prepared Using MOF as Precursor 2 , its preparation method comprises the following steps:

[0021] 1) Dissolve 1g of terephthalic acid in a mixed solution of 25mL N,N-dimethylformamide and water ((V N,N-二甲基甲酰胺 :V 水 =5:1), a clear solution was obtained;

[0022] 2) Add 0.5mL isopropyl titanate dropwise to the clear solution obtained in step 1) to obtain a milky white mixture;

[0023] 3) Transfer the milky white mixture obtained in step 2) to a reaction kettle, and conduct a hydrothermal reaction at 120°C for 24 hours to obtain a white precipitate;

[0024] 4) Wash the obtained white precipitate by centrifugation twice with N,N-dimethylformamide and once with methanol to obtain MIL-125(Ti);

[0025] 5) Put the obtained MIL-125(Ti) into a muffle furnace, raise the temperature to 350°C at a rate of 5°C / min, and calcine at a constant temperature for 5h to obtain the graded mesoporous TiO 2 .

Embodiment 2

[0027] A Hierarchical Mesoporous TiO Prepared Using MOF as Precursor 2 , its preparation method comprises the following steps:

[0028] 1) Dissolve 2g of terephthalic acid in a mixed solution of 30mL N,N-dimethylformamide and water ((V N,N-二甲基甲酰胺 :V 水 =8:1), a clear solution was obtained;

[0029] 2) Add 1.0 mL of isopropyl titanate dropwise to the clear solution obtained in step 1) to obtain a milky white mixture;

[0030] 3) Transfer the milky white mixture obtained in step 2) to a reaction kettle, and conduct a hydrothermal reaction at 160°C for 24 hours to obtain a white precipitate;

[0031] 4) Wash the obtained white precipitate by centrifugation twice with N,N-dimethylformamide and once with methanol to obtain MIL-125(Ti);

[0032] 5) Put the obtained MIL-125(Ti) into a muffle furnace, raise the temperature to 400°C at a rate of 5°C / min, and calcine at a constant temperature for 5h to obtain the graded mesoporous TiO 2 .

Embodiment 3

[0034] A Hierarchical Mesoporous TiO Prepared Using MOF as Precursor 2 , its preparation method comprises the following steps:

[0035] 1) Dissolve 3g of terephthalic acid in a mixed solution of 50mL N,N-dimethylformamide and water ((V N,N-二甲基甲酰胺 :V 水 =10:1), a clear solution was obtained;

[0036] 2) Add 1.5mL isopropyl titanate dropwise to the clear solution obtained in step 1) to obtain a milky white mixture;

[0037] 3) Transfer the milky white mixture obtained in step 2) to a reaction kettle, and conduct a hydrothermal reaction at 180°C for 24 hours to obtain a white precipitate;

[0038] 4) Wash the obtained white precipitate by centrifugation twice with N,N-dimethylformamide and once with methanol to obtain MIL-125(Ti);

[0039] 5) Put the obtained MIL-125(Ti) into a muffle furnace, raise the temperature to 450°C at a rate of 5°C / min, and calcine at a constant temperature for 5h to obtain the graded mesoporous TiO 2 .

[0040] figure 1 Graded mesoporous TiO prepa...

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Abstract

The invention discloses a hierarchical mesoporous TiO2 prepared by taking an MOF (Metal-Organic Framework) as a precursor and an application. The preparation method comprises the following specific steps: dissolving terephthalic acid into a mixed solution of N, N-dimethylformamide and water; then dripping isopropyl titanate, performing a hydrothermal reaction and obtaining MIL-125 (Ti); and finally, calcining the MIL-125 (Ti) and obtaining the hierarchical mesoporous TiO2. The obtained hierarchical mesoporous TiO2 has a larger specific surface area and a better scattering effect, can increase the light harvesting efficiency and charge collection efficiency, and is suitable to be used as a photo-anode material of a dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar cell materials, in particular to a graded mesoporous TiO prepared with MOF as a precursor 2 And its application in the preparation of dye-sensitized solar cell photoanode. Background technique [0002] Dye-sensitized nano solar cells are very likely to replace silicon-based solar cells and occupy a certain position in the future solar cell market due to their low cost, simple process, insensitivity to changes in light intensity and temperature, and high photoelectric conversion efficiency. . Judging from the current research results, titanium dioxide material not only has the advantages of wide source, single crystal form, simple synthesis, microscopic morphology control synthesis, etc., but also has a suitable energy band structure (band gap of 3.37eV) and considerable electron injection efficiency. And high electron mobility, it is a photoanode material with superior photoelectric performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542H01G9/2031
Inventor 魏明灯豆洁李亚峰
Owner FUZHOU UNIV
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