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Preparing method and application of iron base bimetal hydroxide/pucherite photo-anode

A technology of hydroxide and bismuth vanadate, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problem of low oxygen production of photoanode materials, Achieve the effects of improving oxygen production performance, promoting water oxidation reaction, and adjusting the ratio of metals

Inactive Publication Date: 2017-11-17
青岛鲁润能源环境有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of low oxygen production of photoanode materials in the existing process of photolysis of water, the invention discloses a method for preparing an iron-based double metal hydroxide / bismuth vanadate photoanode, comprising the following steps:

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  • Preparing method and application of iron base bimetal hydroxide/pucherite photo-anode
  • Preparing method and application of iron base bimetal hydroxide/pucherite photo-anode

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Embodiment 1

[0029] The preparation method of the iron-based double metal hydroxide / bismuth vanadate photoanode of the present embodiment comprises the following steps:

[0030] 1) Preparation of bismuth vanadate seed crystals

[0031] a. Add 3mmol Bi(NO 3 ) 3 ·5H 2 O, 5mmol NH 4 VO 3 and 8 mmol citric acid in 10 mL of 20% HNO 3 In dilute solution, a transparent blue solution was obtained after stirring for 0.3h;

[0032] b. Add 2.5mL acetic acid and 0.2g polyvinyl alcohol to the above blue solution, and stir evenly;

[0033] c. Take 0.03mL of the stirred solution and spin-coat it on the FTO conductive glass by a spin-coater. The rotating speed of the spin-coater is 2000rpm, and the spin-coating time is 100s; Bismuth vanadate seed crystals were obtained.

[0034] 2) Preparation of bismuth vanadate photoanode material

[0035] d. Mix 0.1mmol Bi(NO 3 ) 3 ·5H 2 O and 0.1 mmol NH 4 VO 3 Dissolve in 5mL HNO 3 Neutralize in 5mL NaOH solution to prepare solution A and solution B re...

Embodiment 2

[0042] The preparation method of the iron-based double metal hydroxide / bismuth vanadate photoanode of the present embodiment comprises the following steps:

[0043] 1) Preparation of bismuth vanadate seed crystals

[0044] a. Add 6mmol Bi(NO 3 ) 3 ·5H 2 O, 8mmol NH 4 VO 3 and 10 mmol citric acid in 15 mL of 20% HNO 3 In the dilute solution, a transparent blue solution was obtained after stirring for 0.5 h;

[0045] b. Add 5.0mL acetic acid and 0.5g polyvinyl alcohol to the above blue solution, and stir evenly;

[0046] c. Take 0.08mL of the stirred solution and spin-coat it on the FTO conductive glass through a spin-coater. The rotation speed of the spin-coater is 3000rpm, and the spin-coating time is 60s; after drying, bake it in a muffle furnace at 350°C for 2.5h. Bismuth vanadate seed crystals were prepared.

[0047] 2) Preparation of bismuth vanadate photoanode material

[0048] d. Add 0.3mmol Bi(NO 3 ) 3 ·5H 2 O and 0.3 mmol NH 4 VO 3 Dissolve in 8mL HNO 3 ...

Embodiment 3

[0055] The preparation method of the iron-based double metal hydroxide / bismuth vanadate photoanode of the present embodiment comprises the following steps:

[0056] 1) Preparation of bismuth vanadate seed crystals

[0057] a. Mix 8mmol Bi(NO 3 ) 3 ·5H 2 O, 10mmol NH 4 VO 3 and 15 mmol citric acid in 20 mL of 20% HNO 3 In the dilute solution, a transparent blue solution was obtained after stirring for 0.6h;

[0058] b. Add 6.5mL acetic acid and 0.8g polyvinyl alcohol to the above blue solution, and stir well;

[0059] c. Take 0.12mL of the stirred solution and spin-coat it on the FTO conductive glass by a spin-coater. The rotating speed of the spin-coater is 4000rpm, and the spin-coating time is 20s; Bismuth vanadate seed crystals were obtained.

[0060] 2) Preparation of bismuth vanadate photoanode material

[0061] d. Mix 0.5mmol Bi(NO 3 ) 3 ·5H 2 O and 0.5 mmol NH 4 VO 3 Dissolve in 10mL HNO 3 Neutralize in 10mL NaOH solution to prepare solution A and solution...

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Abstract

The invention discloses a preparing method of an iron base bimetal hydroxide / pucherite photo-anode. The preparing method comprises the following steps that pucherite seed crystals are prepared; a pucherite photo-anode material is prepared through a hydrothermal method; and iron base bimetal hydroxide is deposited on the surface of the pucherite photo-anode through a rapid electrochemical deposition method, and accordingly an iron base bimetal hydroxide / pucherite photo-anode material is prepared. The invention further discloses application of the iron base bimetal hydroxide / pucherite photo-anode material to photoelectrocatalysis oxygen generation. The electro-deposition method is adopted for preparing the iron base bimetal hydroxide / pucherite photo-anode material, and the beneficial effects that the process is simple, spent time is short, and the metal proportion can be regulated and controlled are achieved. The iron base bimetal hydroxide can serve as an oxygen generation promoter and has the character of visible light response, an interface structure can be formed between the iron base bimetal hydroxide and pucherite, accordingly, generation of the water oxidation reaction is promoted, and accordingly the photoelectric catalysis oxygen generation performance is enhanced.

Description

technical field [0001] The invention relates to the field, in particular to a preparation method and application of an iron-based double metal hydroxide / bismuth vanadate photoanode. Background technique [0002] Severe environmental pollution and huge energy consumption caused by the rapid development of the world economy have become major problems to be solved urgently in all countries, which are also the primary issues related to the survival and development of human beings. Many problems caused by energy shortage and environmental pollution make countries all over the world eager to find renewable, efficient and clean new energy sources. [0003] As a new energy source, solar energy radiates about 4.3×10 20 joules per day, more than the total energy consumption of the earth in one year. Solar energy can split water into H 2 and O 2 , the photolysis of water contains two half-reactions: reduction and oxidation of water; the oxidation of water involves a multi-step four...

Claims

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Application Information

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IPC IPC(8): C25B1/02C25B11/06C25D9/04B01J23/847
CPCC25B1/02C25D9/04B01J23/8472B01J37/10B01J37/348C25B1/55C25B11/069C25B11/073B01J35/33B01J35/39
Inventor 耿超杨东江车延科
Owner 青岛鲁润能源环境有限公司
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