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Nanorod α-iron oxide composite mil-101 ​​heterojunction photoanode and preparation method thereof

A technology of iron oxide and photoanode, 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 limitation of photoanode water splitting performance, and achieve Improve the effect of separation, simple and good process, and good photocatalytic water splitting ability

Inactive Publication Date: 2021-05-18
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 α-iron oxide composite mil-101 ​​heterojunction photoanode and preparation method thereof
  • Nanorod α-iron oxide composite mil-101 ​​heterojunction photoanode and preparation method thereof
  • Nanorod α-iron oxide composite mil-101 ​​heterojunction photoanode 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. Dissolving 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 stirring 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 at...

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 α-iron oxide composite MIL-101 heterojunction photoanode and a preparation method thereof. The technical scheme is as follows: 0.6-0.9 mass parts of ferric trichloride hexahydrate and 0.1-0.4 mass parts of urea are dissolved in 50 mass parts of deionized water, and stirred to obtain a precursor solution of α-iron oxide; The conductive glass facing the inner wall is placed in the reactor, and then the precursor solution of α-iron oxide is transferred to the reactor, hydrothermally reacted, washed, and dried; then the dried iron oxyhydroxide nanorod array is placed in the crucible In the process, the temperature was kept at 400-700°C and 500-800°C successively to obtain Fe 2 O 3 nanorod arrays, and finally Fe 2 O 3 Nanorod arrays and terephthalic acid were placed in the tail end and middle end of the tube furnace in turn, and chemical vapor deposition was carried out under the conditions of argon and 200-800 ℃ to prepare nanorod α-iron oxide composite MIL-101 heterojunction light anode. The invention has simple process and strong operability, and the produced products have strong photoelectric catalytic water oxidation ability.

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 photoelectrodes from semiconductor materials and assemble them into photoelectrochemical cells. 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 Patents(China)
IPC IPC(8): C25B1/04C25B1/55C25B11/054C25B11/091B01J23/745B82Y40/00
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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