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Titanium dioxide composite material and preparation method thereof, photo-anode and application of photo-anode

A technology of titanium dioxide and composite materials, applied in the field of photoelectrochemistry, can solve the problems of excessive load, high device requirements, short service life, etc.

Active Publication Date: 2017-03-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the compounding of various semiconductor materials that currently exist requires the use of more complex technical means, which requires high device requirements, and the loading of semiconductors is not easy to control. On the contrary, the photoelectric performance is reduced due to excessive loading.
At the same time, there is still photocorrosion phenomenon in the loading of semiconductor materials, which makes the stability of the prepared catalyst not high, and the service life is very short, which greatly reduces the use efficiency of the catalyst.

Method used

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Embodiment 1

[0080] A titanium dioxide composite material of the present invention, such as figure 1 and figure 2 As shown, the titanium dioxide composite material includes a titanium dioxide carrier, cuprous sulfide and cadmium sulfide, and the cuprous sulfide and cadmium sulfide are loaded on the surface of the titanium dioxide carrier.

[0081] In this embodiment, the titanium dioxide carrier is a dendritic titania nanorod array, and the dendritic titania nanorods that make up the dendritic titania nanorod array include backbone nanorods, and branched structure nanorods are distributed on the surface of the backbone nanorods, wherein the backbone The length of the nanorods is 1.5 μm-2.0 μm, the diameter of the main nanorods is 40nm-60nm; the length of the nanorods of the branched structure is 50nm-150nm, and the diameter of the nanorods of the branched structure is 10nm-15nm.

[0082] A preparation method of the titanium dioxide composite material in the above-mentioned embodiment of ...

Embodiment 2

[0104] A photoanode of the present invention comprises a titanium dioxide composite material, a binder and a wire, the titanium dioxide composite material is connected to the wire through the binder, wherein the binder is conductive silver paste. The preparation method of the photoanode comprises the following steps:

[0105] With the TiO prepared in step 1.2 in embodiment 1 2 NRs are titanium dioxide composites cut into a size of 1 cm × 2 cm, where the working area is 1 cm 2 , using conductive silver paste as an adhesive to connect copper wires to make photoanode B1.

[0106] With the TiO prepared in step 1.3 in embodiment 1 2 BNRs are titanium dioxide composites cut into a size of 1 cm × 2 cm, where the working area is 1 cm 2 , using conductive silver paste as an adhesive to connect copper wires to make photoanode B2.

[0107] With the TiO prepared in step 2.1 in embodiment 1 2 BNRs / CdS is a TiO composite material cut into a size of 1 cm × 2 cm, where the working are...

Embodiment 3

[0115] A kind of application of photoanode of the present invention in photoelectric catalytic cracking water, comprises the following steps:

[0116]Respectively with the photoanode B1, B2, B3, B4, B5, B6, B8, B10 made in the embodiment 2 of the present invention as the working electrode, the silver-silver chloride electrode as the reference electrode, and the platinum electrode as the counter electrode, Add an electrochemical workstation (CHI660D electrochemical workstation, purchased from Shanghai Chenhua Instrument Co., Ltd.) and a xenon lamp light source (PLS-SXE 300C xenon lamp, purchased from Beijing Pofilai Technology Co., Ltd.) to form a photoelectric catalytic water splitting system. The electrolyte solution is a mixed solution of sodium sulfide and sodium sulfite, wherein the concentration of sodium sulfide is 0.35M, and the concentration of sodium sulfite is 0.25M. The applied voltage of the electrochemical workstation is from -1.2 V to 1.2 V, and the scan rate is ...

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Abstract

The invention discloses a titanium dioxide composite material and a preparation method thereof, a photo-anode and an application of the photo-anode. The titanium dioxide composite material comprises a titanium dioxide carrier, cuprous sulfide and cadmium sulfide, wherein the cuprous sulfide and the cadmium sulfide are loaded on the surface of the titanium dioxide carrier. The preparation method comprises loading of the cadmium sulfide and loading of the cuprous sulfide. The preparation method disclosed by the invention has the advantages that the operation process is simple and the loading amount is easy to control; and the prepared titanium dioxide composite material has the advantages of being simple in preparation process, high in photoelectric conversion efficiency, fast in photoresponse, wide in photoresponse degree range, high in corrosion resistance and good in stability, and relatively high photo-generated current can be generated. The photo-anode disclosed by the invention comprises the titanium dioxide composite material, can be used for photoelectric catalysis cracking of water for hydrogen production, and has the advantages of being high in stability, long in service life, high in photoresponse degree, high in photo-generated current, high in photoelectric catalysis cracking capability on water and high in photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the field of photoelectrochemistry, and relates to a titanium dioxide composite material and its preparation method, a photoanode and the application of the photoanode, in particular to a titanium dioxide composite material loaded with cuprous sulfide and cadmium sulfide, a preparation method thereof, a photoanode and a photoanode. Application of photoanode in photoelectrocatalytic water splitting for hydrogen production. Background technique [0002] Due to the massive exploitation and use of earth's fossil energy, serious environmental pollution has been caused, which has caused serious harm to public health and the ecological environment. And fossil energy is non-renewable. Therefore, facing the increasing energy demand of human beings, seeking new energy sources that can replace fossil energy sources has become a new trend in future development. Among these new energy sources, hydrogen energy, as a clean energy source, ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01L51/48H01L51/42
CPCY02E10/549Y02P70/50
Inventor 汤琳邓垚成曾光明王佳佳周耀渝王敬敬汤晶方伟
Owner HUNAN UNIV
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