Application of a powder photocatalyst on the surface of a bipolar membrane in water splitting

A technology of photocatalysts and bipolar membranes, applied in electrodes, electrolytic components, electrolytic processes, etc., can solve problems such as difficult recycling, easy powder agglomeration, and low efficiency of semiconductor photocatalyst photogenerated electron-hole separation. , solve the effect of easy reunion

Active Publication Date: 2018-11-30
TAIYUAN NORMAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The problem of the present invention lies in the problem that semiconductor photocatalyst powder is easy to agglomerate and difficult to recycle after reaction in the prior art, the problem that semiconductor photocatalyst photogenerated electron-hole separation efficiency is low, the problem that semiconductor photocatalyst cannot work stably, efficiently and continuously, And provide a bipolar membrane surface powder photocatalyst application in water splitting

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  • Application of a powder photocatalyst on the surface of a bipolar membrane in water splitting
  • Application of a powder photocatalyst on the surface of a bipolar membrane in water splitting
  • Application of a powder photocatalyst on the surface of a bipolar membrane in water splitting

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Experimental program
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Effect test

Embodiment approach 1

[0034] The surface of the powder state photocatalyzed bipolar membrane is used as the diaphragm of the cathode chamber and the anode chamber (wherein the surface of the cation exchange membrane constituting the bipolar membrane is loaded with Ag 2 O semiconductor photocatalyst powder, TiO loaded on the surface of the anion exchange membrane constituting the bipolar membrane 2 semiconductor photocatalyst powder), the Ag 2 O semiconductor photocatalyst powder material as a cathode, the TiO 2 Semiconductor photocatalyst powder material as anode, 0.5 M H 2 SO 4 The solution was used as the catholyte, and 1.0 M KOH solution was used as the anolyte; a xenon lamp was used as the simulated sunlight light source, and the photocatalytic water splitting hydrogen production was continuously carried out under the action of an applied voltage of 1.0 V.

[0035] The results of hydrogen production efficiency are attached Figure 12 And attached Figure 13 It is shown that at the same cur...

Embodiment approach 2

[0037] The surface of the powder state photocatalyzed bipolar membrane is used as the diaphragm of the cathode chamber and the anode chamber (wherein the surface of the cation exchange membrane constituting the bipolar membrane is loaded with Ag 2 O semiconductor photocatalyst powder, the surface of the anion exchange membrane constituting the bipolar membrane supports Fe 2 o 3 semiconductor photocatalyst powder), the Ag 2 O semiconductor photocatalyst powder material as a cathode, the Fe 2 o 3 Semiconductor photocatalyst powder material as anode, 0.5 M H 2 SO 4 The solution was used as the catholyte, and 0.5 M KOH solution was used as the anolyte; a xenon lamp was used as the simulated sunlight light source, and the photocatalytic water splitting hydrogen production was continuously carried out under the action of an applied voltage of 0.8 V.

[0038] The research results show that at the same current density, the hydrogen production efficiency of the catalyst-supported ...

Embodiment approach 3

[0040] The bipolar membrane with powder state photocatalysis on the surface is used as the diaphragm of the cathode chamber and the anode chamber (wherein, the surface of the cation exchange membrane constituting the bipolar membrane is loaded with CoO semiconductor photocatalyst powder, and the surface of the anion exchange membrane constituting the bipolar membrane is loaded with ZnO semiconductor photocatalyst powder), CoO semiconductor photocatalyst powder material is used as cathode, ZnO semiconductor photocatalyst powder material is used as anode, 1.0 M H 2 SO 4 The solution was used as the catholyte, and 1.0 M KOH solution was used as the anolyte; a xenon lamp was used as the simulated sunlight light source, and the photocatalytic water splitting hydrogen production was continuously carried out under the action of an applied voltage of 1.0 V.

[0041] The research results show that at the same current density, the hydrogen production efficiency of the catalyst-supported...

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Abstract

An application of a bipolar film surface powder state photocatalyst in water splitting, the application is based on a cation exchange membrane with a surface-loaded P-type semiconductor photocatalyst powder and an anion-exchange membrane with a surface-loaded N-type semiconductor photocatalyst powder as bipolar film, and constitute the cathode chamber and the anode chamber diaphragm, the P-type semiconductor photocatalyst powder material is used as the cathode, and the N-type semiconductor photocatalyst powder material is used as the anode. A xenon lamp was used as the light source, and the photocatalytic water splitting hydrogen production was continuously carried out under the action of an applied voltage of 0.5-2.0 V. In the present invention, the catalyst in powder state is attached to both sides of the bipolar membrane for photoelectric catalytic water splitting to produce hydrogen. The voltage and hydrogen production efficiency remain basically unchanged, realizing the efficient and continuous operation of semiconductor powder state photocatalyst to decompose water to produce hydrogen.

Description

technical field [0001] The invention relates to the application of a powder catalyst in water splitting, in particular, it is a technical proposal for the application of a powder catalyst-loaded bipolar membrane in water splitting and hydrogen production. Background technique [0002] Semiconductor photocatalysis technology is an effective technical means to convert solar energy into chemical energy, which is of great significance to solve the energy shortage and reduce the pressure of environmental pollution. After years of exploration and accumulation by scientists from various countries, research in this field has made great progress, but overall, the efficiency of photocatalysis using solar energy is still relatively low. One of the main reasons is that the photogenerated electrons-holes cannot be effectively separated and recombined, resulting in a decrease in photocatalytic activity. Scholars at home and abroad have used various methods to separate photogenerated elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/10C25B9/10C25B11/06C25B9/23
CPCC25B1/55C25B1/04C25B9/73C25B9/23C25B11/073Y02E60/36
Inventor 刘宪韩艳娇宋秀丽杨慧敏代红艳梁镇海
Owner TAIYUAN NORMAL UNIV
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