A preparation method of highly oxidative porphyrin-sensitized sno2 biomimetic photoanode

A photoanode and high oxidation technology, applied in photosensitive equipment, photovoltaic power generation, capacitors, etc., can solve the problems of poor optical performance and chemical property stability, high cost of water oxidation photoanode, and low water splitting efficiency

Active Publication Date: 2018-11-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high cost of preparing water oxidation photoanode, poor stability of optical properties and chemical properties and low water decomposition efficiency, and provide a kind of highly oxidative porphyrin sensitized SnO 2 Preparation method of biomimetic photoanode

Method used

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  • A preparation method of highly oxidative porphyrin-sensitized sno2 biomimetic photoanode
  • A preparation method of highly oxidative porphyrin-sensitized sno2 biomimetic photoanode
  • A preparation method of highly oxidative porphyrin-sensitized sno2 biomimetic photoanode

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specific Embodiment approach 1

[0051] Specific implementation mode 1: This implementation mode is a highly oxidative porphyrin sensitized SnO 2 The biomimetic photoanode preparation method is specifically completed according to the following steps:

[0052] 1. Preparation of SnO 2 Powder:

[0053] Add stannous chloride dihydrate into deionized water, and then stir evenly to obtain a milky white suspension; add dropwise concentrated nitric acid with a mass fraction of 65% to the milky white suspension under the condition of stirring again to obtain a light yellow solution; using mass fraction of 25% to 28% ammonia water to adjust the pH value of the light yellow solution to 7 to obtain a white gel; use deionized water to wash the white gel centrifugally until the white gel does not contain chlorine ions to obtain a white gel that removes chloride ions; put the white gel that removes chloride ions into a hydrothermal reaction kettle, then conduct a hydrothermal reaction at a temperature of 180°C to 200°C fo...

specific Embodiment approach 2

[0087] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, tin protochloride dihydrate is added to deionized water, and then stir evenly to obtain a milky white suspension; Adding concentrated nitric acid with a mass fraction of 65% to the milky white suspension to obtain a light yellow solution; using ammonia water with a mass fraction of 25% to adjust the pH value of the light yellow solution to 7 to obtain a white gel; Centrifugal washing of the white gel with ionized water until the white gel does not contain chloride ions, and the white gel with chloride ions removed is obtained; the white gel with chloride ions removed is put into a hydrothermal reaction kettle, and then heated at a temperature of 190°C Underwater thermal reaction for 24 hours, then naturally cooled to room temperature to obtain a white solid; use deionized water to centrifuge wash the white solid 4 times, then dry, grind the dried white solid to ob...

specific Embodiment approach 3

[0088] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the SnO described in step 2 2 The mass ratio of powder to terpineol is 1:4.6; the SnO 2 The mass ratio of powder to ethyl cellulose is 1:0.27; the SnO 2 The mass ratio of powder to absolute ethanol is 1:0.9. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of a porphyrin sensitized SnO2 bionic photoanode with high oxidizability, relating to a preparation method of the photoanode. The invention aims to solve problems that the water oxidized photoanode prepared through existing methods is high-cost, and has poor optical performance, low chemical stability and low water decomposition efficiency. The preparation method comprises the steps of first, preparing SnO2 powder; second, concocting SnO2 sizing agent; third, preparing an SnO2 photoanode; fourth, preparing a photoanode sensitized by a photosensitizer; fifth, preparing a photoanode sensitized through both the photosensitizer and a catalyst; and sixth, immersing in ZrCl4 alcohol water solution, then immersing in an electronic transfer medium, so as to obtain the porphyrin sensitized SnO2 bionic photoanode with high oxidizability. The preparation method is applicable to preparation of the porphyrin sensitized SnO2 bionic photoanode with high oxidizability.

Description

technical field [0001] The invention relates to a method for preparing a photoanode. Background technique [0002] As the cornerstone of the development of human society, energy has always been the focus of attention of the whole society in the way of its development and utilization. Nowadays, with the rapid development of human society, the environmental problems caused by using fossil energy as the main energy drive people to look for a greener and more sustainable energy source. Hydrogen energy has entered the field of vision of scientists due to its cleanliness and high energy density. By simulating photosynthesis and using solar energy to split water to generate hydrogen, this clean energy can be continuously provided. [0003] In the research process of simulating photosynthesis to split water to produce hydrogen, the water oxidation reaction has become a restrictive factor. Therefore, the construction of molecular water oxidation devices to improve the efficiency of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20
CPCH01G9/2027Y02E10/542
Inventor 那永苗思文韦沛成周丽
Owner HARBIN INST OF TECH
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