Preparation method of NiO photocathode based on self-assembly of zinc porphyrin and cobalt dimethylglyoximate

A technology of dimethylglyoxime and photocathode, which is applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve the problems of slow hydrogen production, complicated methods, and low efficiency of photocathode for water decomposition

Inactive Publication Date: 2017-05-17
HARBIN INST OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex methods for preparing photocathode, low photocathode water decomposition efficiency and slow hydrogen production speed, and provide a NiO photocathode based on the self-assembly of porphyrin zinc and dimethylglyoxime cobalt Preparation

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  • Preparation method of NiO photocathode based on self-assembly of zinc porphyrin and cobalt dimethylglyoximate
  • Preparation method of NiO photocathode based on self-assembly of zinc porphyrin and cobalt dimethylglyoximate
  • Preparation method of NiO photocathode based on self-assembly of zinc porphyrin and cobalt dimethylglyoximate

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specific Embodiment approach 1

[0068] Embodiment 1: This embodiment is a method for preparing a NiO photocathode based on the self-assembly of porphyrin zinc and dimethylglyoxime cobalt, which is characterized in that the method is specifically completed according to the following steps:

[0069] 1. Preparation of NiO dense layer precursor: NiCl 2 ·6H 2 O, P123, deionized water and absolute ethanol were mixed, stirred evenly and then placed in a centrifuge to remove the precipitate, and the obtained supernatant was the NiO dense layer precursor;

[0070] NiCl as described in step 1 2 ·6H 2 The mass ratio of O to P123 is 1:(0.5~0.8);

[0071] NiCl as described in step 1 2 ·6H 2 The mass ratio of O to deionized water is 1:(1.3~1.66);

[0072] NiCl as described in step 1 2 ·6H 2 The mass ratio of O and absolute ethanol is 1:(3~3.3);

[0073] The centrifugal speed of the centrifuge described in step 1 is 7000r / min~9000r / min, and the centrifugation time is 3min~7min;

[0074] 2. Preparation of NiO dens...

specific Embodiment approach 2

[0126] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the NiCl described in step one 2 ·6H 2 The mass ratio of O and P123 is 1:(0.5~0.65); NiCl described in step one 2 ·6H 2 The mass ratio of O to deionized water is 1:(1.3~1.45); the NiCl described in step one 2 ·6H 2 The mass ratio of O to absolute ethanol is 1:(3-3.15). Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0127] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step two (1), the NiO dense layer precursor solution obtained in step one is spin-coated to the conductive surface of FTO conductive glass by spin coating and then placed in an oven at a temperature of 65°C to 75°C to dry for 3min to 5min; repeat step 2①1 to 2 times in step 2②, and then sinter at a temperature of 300°C to 350°C for 30min to 40min to obtain FTO conductive glass with NiO dense layer on the surface. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a NiO photocathode based on self-assembly of zinc porphyrin and cobalt dimethylglyoximate. The preparation method aims at solving the problems that existing photocathode preparation methods are complex, photocathodes are low in water decomposition efficiency, and the hydrogen production speed is low. The preparation method comprises the steps of 1, preparing a precursor solution of a NiO compact layer; 2, preparing the NiO compact layer; 3, preparing slurry; 4, preparing a NiO blank piece; 5, preparing a NiO photocathode sensitized by ZnTHPP; 6, preparing a NiO photocathode sensitized by ZnTHPP-bpy; 7, preparing a NiO photocathode sensitized by self-assembly of ZnTHPP-bpy-Codmg; 8, preparing a NiO photocathode sensitized by ZnTPPC; 9, preparing a NiO photocathode sensitized by ZnTPPC-bpy; and 10, conducting soaking and cleaning. By means of the preparation method, the NiO photocathode based on self-assembly of the zinc porphyrin and the cobalt dimethylglyoximate can be obtained.

Description

technical field [0001] The invention relates to a method for preparing NiO photocathode. Background technique [0002] How to produce sustainable clean energy is a major challenge for the scientific community in the 21st century, and solar energy, as an inexhaustible green energy, can be utilized by constructing a photocathode of a dye-sensitized solar cell structure Solar energy decomposes water to generate hydrogen, and realizes the conversion of solar energy to hydrogen energy, which can perfectly solve the energy crisis and environmental problems currently faced by human beings. At present, photosensitizers used to construct photocathodes for water decomposition include: compounds containing noble metal ruthenium, porphyrin and its derivatives, and pure organic dyes; hydrogen release catalysts include: compounds containing elements such as iron, cobalt, and nickel. In order to maximize the water splitting efficiency of the photocathode, it is necessary to organically co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B1/55C25B11/051C25B11/095Y02E60/36
Inventor 那永韦沛成周丽
Owner HARBIN INST OF TECH
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