A preparation method of pd/mn/tnts photoelectrode with improved photogenerated charge separation and carbon dioxide reduction performance

A technology of carbon dioxide and photogenerated charges, applied in electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of poor separation of photogenerated charges and low utilization rate of visible light, and achieve the effect of improving reduction performance and improving absorption

Active Publication Date: 2019-10-22
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention will solve existing TiO 2 Photocatalytic reduction of CO by nanotube array photoelectrode 2 The technical problems of low utilization rate of visible light and poor separation of photogenerated charges existed in the process, and a preparation method of Pd / Mn / TNTs photoelectrode with improved photogenerated charge separation and carbon dioxide reduction performance was provided

Method used

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  • A preparation method of pd/mn/tnts photoelectrode with improved photogenerated charge separation and carbon dioxide reduction performance
  • A preparation method of pd/mn/tnts photoelectrode with improved photogenerated charge separation and carbon dioxide reduction performance
  • A preparation method of pd/mn/tnts photoelectrode with improved photogenerated charge separation and carbon dioxide reduction performance

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specific Embodiment approach 1

[0018] Embodiment 1: In this embodiment, a method for preparing a Pd / Mn / TNTs photoelectrode that improves the separation of photogenerated charges and the reduction performance of carbon dioxide is carried out in the following steps:

[0019] 1. The pretreated metal Ti foil is used as the anode, the Pt sheet is used as the cathode, and the glycerol solution of ammonium fluoride is used as the electrolyte solution, and the metal Ti foil is treated by anodic oxidation method, and the anodic oxidation voltage is controlled at 5-20V. The oxidation time is 1-5h, take out the metal Ti foil, wash it with deionized water, dry it, put it into a muffle furnace, control the temperature at 100-800°C, and calcinate it for 2-10h to get TiO 2 nanotube arrays;

[0020] 2. Add acetic acid to KMnO 4 solution, magnetically stirred for 5 to 100 minutes, and then added the TiO obtained in step 1 2 The nanotube array is then impregnated in a vacuum drying oven for 1-10 hours, taken out, and then ...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, oxalic acid is used to pretreat the metal Ti foil. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass concentration of ammonium fluoride in the glycerol solution of ammonium fluoride in step 1 is 0.5%. Others are the same as in the first or second embodiment.

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Abstract

A method for preparing a Pd / Mn / TNTs photoelectrode that improves photogenerated charge separation and carbon dioxide reduction performance, and the invention relates to a method for reducing CO with improved photogenerated charge separation 2 The field of photoelectrode preparation methods. The present invention will solve existing TiO 2 Photocatalytic reduction of CO by nanotube array photoelectrode 2 The technical problems of low utilization rate of visible light and poor separation of photogenerated charges existed in the chemicalization process. Method: 1. MnOx modified TiO 2 Preparation of nanotube array photoelectrodes; 2. Pd and MnOx co-modified TiO 2 Fabrication of Nanotube Array Photoelectrodes. The invention realizes TiO co-modified by Pd and MnOx 2 Nanotube array photoelectrode for photocatalytic reduction of CO 2 The process of placing the prepared photoelectrode in KHCO containing 0.1M 3 , 4cm long, 3cm wide, in a plexiglass reactor with quartz glass on one side, a certain amount of liquid was extracted after irradiating for 1 hour to measure the reduction products therein. The present invention is used for the preparation of photogenerated charge separation for the reduction of CO 2 Pd and MnOx co-modified TiO 2 Nanotube array photoelectrodes.

Description

technical field [0001] The present invention relates to improved separation of photogenerated charges for the reduction of CO 2 The field of photoelectrode preparation methods. Background technique [0002] The rapid development of the global economy and the acceleration of industrialization and urbanization have brought serious environmental pollution and energy problems. The combustion of non-renewable energy such as coal and oil releases a large amount of CO 2 The gas has brought about a serious greenhouse effect, affecting the normal production and life of human beings. will CO 2 Switching to useful fuels does more than mitigate CO 2 The environmental problems caused by the release can also generate new energy, which is a win-win strategy. Among many technologies to deal with environmental and energy problems, semiconductor photocatalysis technology has entered people's sight because of its advantages of simple operation, no secondary pollution, low energy consumpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C23C18/12C25D3/50C25B3/04C25B11/06C25B3/25
CPCC23C18/1216C25D3/50C25D11/26C25B3/25C25B11/093
Inventor 冯玉杰吴晶刘佳
Owner HARBIN INST OF TECH
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