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Two-dimensional receptor molecule/hierarchical pore TiO2 composite photocatalyst, preparation method and photocatalytic application thereof

A technology of acceptor molecules and complex light, which is applied in the field of photocatalysis, can solve the problems of multi-dimensional functional composite materials that have not been studied by anyone, and achieve the effect of improving the activity of photocatalytic hydrogen production, obvious synergistic enhancement, and promoting separation

Active Publication Date: 2021-02-12
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no one has studied the multidimensional functional composite materials obtained by combining such two-dimensional acceptor molecules with porous TiO2.

Method used

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  • Two-dimensional receptor molecule/hierarchical pore TiO2 composite photocatalyst, preparation method and photocatalytic application thereof
  • Two-dimensional receptor molecule/hierarchical pore TiO2 composite photocatalyst, preparation method and photocatalytic application thereof
  • Two-dimensional receptor molecule/hierarchical pore TiO2 composite photocatalyst, preparation method and photocatalytic application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Porous TiO 2 Preparation: Add 10mL tetrabutyl titanate dropwise to 20mL ethanol to form light yellow sol, stir, add 20mL acetic acid, then add 50mL distilled water, add 200mg degraded chitosan under vigorous stirring, stir at room temperature for 1 h, seal , hydrothermal temperature of 200 ° C for 12 h, the synthesized sample was centrifuged, washed with ethanol and water three times, placed in a vacuum oven at 80 ° C and dried overnight to obtain a light yellow solid powder sample, and the obtained solid powder was separated Calcination and crystallization at 200°C, 300°C, 400°C and 500°C.

Embodiment 2

[0037] Naphthalene tetracarboxylic dianhydride / porous TiO 2The preparation of composite photocatalyst: the 100mg porous TiO that embodiment 1 makes 2 Grind and pulverize, disperse into 20mL DMF, and keep stirring, add 10mg naphthalenetetracarboxylic dianhydride, heat at 80°C and stir for 14h, centrifuge, wash with DMF and ethanol three times, dry in vacuum at 45°C overnight to obtain a yellow-brown powder sample .

Embodiment 3

[0039] Naphthalene tetracarboxylic dianhydride / porous TiO 2 The preparation of composite photocatalyst: the 100mg porous TiO that embodiment 1 makes 2 Grind and pulverize, disperse into 20mL DMF, and keep stirring, add 20mg naphthalenetetracarboxylic dianhydride, heat at 80°C and stir for 14h, centrifuge, wash with DMF and ethanol three times, dry in vacuum at 45°C overnight to obtain a yellow-brown powder sample .

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Abstract

The invention discloses a photocatalyst obtained by compounding two-dimensional receptor molecules with porous TiO2, a preparation method and application thereof, and belongs to the technical field ofphotocatalysis. The two-dimensional receptor molecule composite porous TiO2 photocatalyst is formed by loading two-dimensional receptor molecules on the surface of porous TiO2. The preparation methodcomprises the following steps: taking degraded chitosan as a template agent, performing hydrothermal method and calcination to obtain porous TiO2 with micro-nano pore channels, dispersing the porousTiO2 into a solvent, dropwise adding a two-dimensional receptor molecule solution with a certain concentration, stirring overnight at 120 DEG C, and performing centrifugal washing and drying to obainthe product. According to the invention, the two-dimensional acceptor molecule / porous TiO2 composite photocatalyst increases the response range of the material to sunlight by utilizing the firm bonding effect between rich active sites on the surface of porous TiO2 and two-dimensional acceptor molecules with larger surface area, and the introduction of the two-dimensional acceptor molecules greatlypromotes the separation of photo-induced electron holes and the transmission of photoelectrons, so that the activity of hydrogen production by photocatalytic decomposition of water and the stabilityof the catalyst are improved, and the photocatalyst has a good application prospect in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a two-dimensional acceptor molecule / porous TiO 2 Composite photocatalyst and its preparation method and application in photocatalysis. Background technique [0002] Hydrogen energy has the advantages of high energy density, clean and pollution-free. As the renewable energy with the most application value in the 21st century, it has attracted people's attention. It has great potential in solving energy shortage and environmental pollution. With the help of photocatalytic technology, it will Solar water splitting to obtain hydrogen is a promising application method. Since 1972, Japanese scientists have used light to excite TiO 2 Since semiconductors split water to obtain hydrogen, various photocatalytic materials have been developed. Especially for cheap, environmentally friendly and abundant sources of TiO 2 The development and application of semiconductors, and its sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J21/06B01J35/10B01J37/10C01B3/04
CPCB01J31/0201B01J21/063B01J37/10C01B3/042B01J35/23B01J35/613B01J35/615B01J35/633B01J35/647B01J35/39Y02E60/36
Inventor 陈逸凡李健维井访国燕萌贾春满王梦圆吴海妹孔德瑞李博李亚东
Owner HAINAN UNIVERSITY
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