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Nanorod alpha-ferric oxide composite MIL-101 heterojunction photo-anode and preparation method thereof

A technology of iron oxide and nanorods, which is applied in the field of nanorod α-iron oxide composite MIL-101 heterojunction photoanode and its preparation, can solve problems such as difficult operation, complicated process, and limited photoanode water splitting performance, and achieve Improve the effect of separation, simple and good process, and high-efficiency photocatalytic water splitting ability

Inactive Publication Date: 2019-11-08
武汉埃斯特测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technology is mainly through other semiconductor materials and α-Fe 2 o 3 Form a heterojunction to promote the separation of electron-hole pairs, but still have the problems of complex process, difficult operation and high heterojunction interface charge migration barrier, which limits the water splitting performance of photoanodes

Method used

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  • Nanorod alpha-ferric oxide composite MIL-101 heterojunction photo-anode and preparation method thereof
  • Nanorod alpha-ferric oxide composite MIL-101 heterojunction photo-anode and preparation method thereof
  • Nanorod alpha-ferric oxide composite MIL-101 heterojunction photo-anode and preparation method thereof

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Embodiment 1

[0027] A nanorod α-iron oxide composite MIL-101 heterojunction photoanode and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0028] Step 1. Dissolving 0.6-0.7 parts by mass of ferric chloride hexahydrate and 0.1-0.2 parts by mass of urea in 50 parts by mass of deionized water, and stirring for 5-15 minutes to obtain a precursor solution of α-iron oxide.

[0029] Step 2, placing the conductive glass in the reactor, with the conductive surface of the conductive glass facing the inner wall of the reactor; then transferring the precursor solution of α-iron oxide to the reactor and sealing it; then The hydrothermal reaction is carried out under the condition of 80-100 DEG C, and the time of the hydrothermal reaction is 4-6 hours, washed and dried to obtain the iron oxyhydroxide nanorod array.

[0030] Step 3, placing the iron oxyhydroxide nanorod array in a crucible, raising the temperature to 400-500°C in an air atmosphere, k...

Embodiment 2

[0033] A nanorod α-iron oxide composite MIL-101 heterojunction photoanode and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0034] Step 1. Dissolve 0.7-0.8 parts by mass of ferric chloride hexahydrate and 0.2-0.3 parts by mass of urea in 50 parts by mass of deionized water, and stir for 15-25 minutes to obtain a precursor solution of α-iron oxide.

[0035]Step 2, placing the conductive glass in the reactor, with the conductive surface of the conductive glass facing the inner wall of the reactor; then transferring the precursor solution of α-iron oxide to the reactor and sealing it; then The hydrothermal reaction is carried out under the condition of 100-120 DEG C, the time of the hydrothermal reaction is 6-8 hours, washing and drying are carried out to obtain the iron oxyhydroxide nanorod array.

[0036] Step 3: Place the iron oxyhydroxide nanorod array in a crucible, raise the temperature to 500-600°C in an air atmosphe...

Embodiment 3

[0039] A nanorod α-iron oxide composite MIL-101 heterojunction photoanode and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0040] Step 1. Dissolving 0.8-0.9 parts by mass of ferric chloride hexahydrate and 0.3-0.4 parts by mass of urea in 50 parts by mass of deionized water, and stirring for 25-35 minutes to obtain a precursor solution of α-iron oxide.

[0041] Step 2, placing the conductive glass in the reactor, with the conductive surface of the conductive glass facing the inner wall of the reactor; then transferring the precursor solution of α-iron oxide to the reactor and sealing it; then The hydrothermal reaction is carried out under the condition of 120-140 DEG C, and the hydrothermal reaction time is 8-10 hours, washed and dried to obtain the iron oxyhydroxide nanorod array.

[0042] Step 3: Place the iron oxyhydroxide nanorod array in a crucible, raise the temperature to 600-700°C in an air atmosphere, keep it w...

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Abstract

The invention relates to a nanorod alpha-ferric oxide composite MIL-101 heterojunction photo-anode and a preparation method thereof. According to the technical scheme, the preparation method comprisesthe following steps: dissolving 0.6-0.9 part by mass of ferric trichloride hexahydrate and 0.1-0.4 part by mass of urea into 50 parts by mass of deionized water, and performing stirring so as to obtain a precursor solution of alpha-ferric oxide; putting conductive glass of which the conductive surface faces to an inner wall into a reaction kettle, further transferring the precursor solution of alpha-ferric oxide into the reaction kettle, performing a hydrothermal reaction, performing washing, and performing drying; putting a hydroxyl iron oxide nanorod array obtained after drying into a crucible, respectively keeping temperatures at 400-700 DEG C and 500-800 DEG C respectively so as to obtain a Fe2O3 nanorod array, finally putting the Fe2O3 nanorod array and terephthalic acid into the tail end and the middle end of a tubular furnace in sequence, and performing chemical vapor deposition in the presence of argon at 200-800 DEG C, so as to obtain the nanorod alpha-ferric oxide compositeMIL-101 heterojunction photo-anode. The preparation method is simple in process and good in operability, and the obtained product has good photoelectric catalytic water oxidation performance.

Description

technical field [0001] The invention belongs to the technical field of photoelectric anodes. Specifically relates to a nanorod α-iron oxide composite MIL-101 heterojunction photoanode and a preparation method thereof. Background technique [0002] The massive combustion of fossil fuels has brought about global energy shortages and environmental pollution. Finding clean and sustainable alternative energy sources is a current research hotspot, and it is also a demand for the rapid development of society. Simulating the photosynthesis process in nature, using sunlight to catalyze water splitting is an important way to convert solar energy into hydrogen energy. At present, there are two main technical methods for solar water splitting: photocatalysis and photoelectrocatalysis. Photoelectrocatalysis is to prepare a photoelectrode with semiconductor materials and assemble it into a photoelectrochemical cell. Hydrogen evolution and oxygen evolution are performed on the two electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06B01J23/745B82Y40/00
CPCC25B1/04B01J23/745B82Y40/00C25B1/55C25B11/091B01J35/33B01J35/39Y02E60/36
Inventor 赵雷汪花丽何漩肖丰李薇馨陈辉方伟
Owner 武汉埃斯特测控技术有限公司
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