Preparation Technology of Nano-α-Fe2O3 Thin Film Electrode Responsive to Visible Light

A technology of thin film electrode and preparation process, which is applied in the field of nanomaterials, can solve the problems of fast formation of oxide layer, influence on the photoelectrocatalytic performance of thin film electrode, difficulty in controlling the thickness of oxide layer, etc., achieve good effect, good visible light absorption performance, good The effect of technical effects

Inactive Publication Date: 2016-09-14
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the preparation process of this method, the formation speed of the oxide layer is fast, the thickness of the oxide layer is not easy to control, and it is easy to form such as FeO and Fe in the contact part of the oxide layer and the iron substrate. 3 o 4 The transition layer (Electrochem.Commun.,2012,23,59–62.), which will seriously affect the prepared α-Fe 2 o 3 Photoelectrocatalytic properties of thin film electrodes

Method used

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  • Preparation Technology of Nano-α-Fe2O3 Thin Film Electrode Responsive to Visible Light
  • Preparation Technology of Nano-α-Fe2O3 Thin Film Electrode Responsive to Visible Light
  • Preparation Technology of Nano-α-Fe2O3 Thin Film Electrode Responsive to Visible Light

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Experimental program
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Effect test

Embodiment 1

[0042] First, 5g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, then 30mL of 27% ammonia water was added thereto and vigorously stirred to obtain an electrolyte solution, the cleaned fluorine-doped tin oxide conductive glass (FTO) was placed in the electrolyte solution, and the negative electrode of the stabilized power supply connected to each other, with a platinum electrode as the counter electrode, adjusting the voltage to 2V, electrodepositing for 30s, taking out the FTO on which the Fe film was deposited, rinsing it with deionized water, and drying it at about 50°C for 1 hour to obtain the Fe film; then The Fe thin film was placed in a muffle furnace and sintered at a high temperature of 500 °C for 2 h, then naturally cooled to room temperature to obtain nano-α-Fe 2 o 3 thin film electrodes.

[0043] figure 2 Among them, A shows the surface micro-morphology of the Fe thin film, and its surface is uniform granular, and B shows the nanometer α-Fe 2 o 3 The s...

Embodiment 2

[0051] First, 2g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, then 20mL of 27% ammonia water was added thereto and vigorously stirred to obtain an electrolyte solution, the cleaned fluorine-doped tin oxide conductive glass (FTO) was placed in the electrolyte solution, and the negative electrode of the stabilized power supply connected to each other, with a platinum electrode as the counter electrode, adjusting the voltage to 2.5V, electrodeposition for 60s, taking out the FTO with the deposited Fe film, washing it with deionized water, drying it at about 50°C for 1 hour to obtain the Fe film, and then depositing the Fe film The above-mentioned Fe thin film is placed in a muffle furnace and sintered at a high temperature of 700 ° C for 1.5 h, and then naturally cooled to room temperature to obtain nano-α-Fe 2 o 3 thin film electrodes. The α-Fe 2 o 3 The film is pure α-Fe 2 o 3 , with a thickness of about 410nm.

Embodiment 3

[0053] First 8g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, and then 50mL of 27% ammonia water was added to it and vigorously stirred to obtain an electrolyte solution. The washed FTO was placed in the electrolyte solution, connected to the cathode of the regulated power supply, and a platinum electrode was used as the counter electrode , adjust the voltage to 1.5V, electrodeposit for 15s, take out the FTO with the deposited Fe film, rinse it with deionized water, dry it at about 50°C for 1 hour to obtain the Fe film, and then place the Fe film in the muffle After being sintered at 400°C for 6 hours in a furnace, it was naturally cooled to room temperature to obtain nano-α-Fe 2 o 3 thin film electrodes. The α-Fe 2 o 3 The film is pure α-Fe 2 o 3 , with a thickness of about 180nm.

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Abstract

The invention relates to a preparation process of a visible-light responsive nano alpha-ferric oxide membrane electrode. The preparation process comprises the following steps: (1) dissolving 2g to 8g of FeSO4.7H2O in 150mL of deionized water, adding 20mL to 50mL of 27% ammonia water, intensively mixing to obtain an electrolyte solution, carrying out the electride deposition for 15 to 60 seconds under the voltage of 1.5V to 2.5V by adopting conductive substrate fluorine-doped tin oxide conductive glass as a cathode and adopting a platinum sheet as an anode, flushing a Fe membrane obtained on the cathode by utilizing deionized water, and drying the Fe membrane for more than 1h at the temperature of about 50 DEG C; and naturally cooling the Fe membrane to obtain the nano alpha-Fe2O3 membrane electrode. The preparation process has characteristics of simplicity, moderation and high efficiency. The prepared nano alpha-Fe2O3 membrane electrode is good in visible light absorption performance and stability, high in the photovoltaic efficiency, good in effect for photovoltaic catalytically degrading organisms, applicable to the fields of photovoltaic catalytic hydrogen production and organism degradation and better in effect.

Description

technical field [0001] The present invention relates to photoelectric catalysis electrode material, be specifically related to a kind of nano α-ferric oxide (being α-Fe 2 o 3 ) The invention relates to a preparation process of a thin-film photocatalytic electrode, which belongs to the field of nanometer materials. Background technique [0002] Solar photodegradation of organic matter and hydrogen production based on photocatalytic technology is a new technology with promising application prospects. In this technology, the performance of the photocatalytic electrode directly affects the effect of the photocatalytic system. Therefore, the preparation of photocatalytic electrode materials is a research hotspot in the field of photocatalysis. [0003] At present, it is generally believed that the characteristics that an excellent photocatalytic electrode should have are: good visible light absorption performance, stable in aqueous solution, non-toxic, easy to prepare, and che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/20C25D5/50
CPCC25D3/20C25D5/50
Inventor 周保学曾庆意白晶李金花董一帆赵凯陈帅王芮
Owner SHANGHAI JIAOTONG UNIV
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