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A ti-doped α-fe 2 o 3 Nanorod composite mofs heterojunction photoanode and its preparation method and application

A -fe2o3, heterojunction technology, applied in photosensitive equipment, photovoltaic power generation, capacitors, etc., can solve the problems of limiting photoanode water splitting performance, difficult operation, complicated process, etc., and achieve good photoelectric catalytic water splitting ability and good conduction The effect of carriers and simple process

Active Publication Date: 2021-10-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned technologies are mainly through the introduction of high-valence doping elements to enhance the intrinsic conductivity, or the use of 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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  • A ti-doped α-fe <sub>2</sub> o <sub>3</sub> Nanorod composite mofs heterojunction photoanode and its preparation method and application
  • A ti-doped α-fe <sub>2</sub> o <sub>3</sub> Nanorod composite mofs heterojunction photoanode and its preparation method and application
  • A ti-doped α-fe <sub>2</sub> o <sub>3</sub> Nanorod composite mofs heterojunction photoanode and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, Ti doped with α-Fe 2 o 3 A method for preparing a nanorod composite MOFs heterojunction photoanode, comprising the following steps:

[0034] 1) To Ti 3 AlC 2 Hydrofluoric acid was slowly added dropwise into the solution, Ti 3 AlC 2 The solid-to-liquid mass ratio with hydrofluoric acid is 1:5, and the stirring is continued for 24 hours to obtain Ti 3 C 2 solution;

[0035] 2) Ti will be obtained 3 C 2 The solution was cleaned by centrifugation with deionized water, and dried in a vacuum oven to obtain Ti 3 C 2 powder;

[0036] 3) 0.5 parts by mass of ferric chloride hexahydrate, 0.01 parts by mass of Ti 3 C 2 and 0.1 mass parts of urea were dissolved in 50 mass parts of deionized water, and stirred for 5 min to obtain Ti-doped α-Fe 2 o 3 precursor solution;

[0037] 4) Conductive glass is placed in the reactor, the conductive surface of the conductive glass faces the inner wall of the reactor; then the Ti doped α-Fe 2 o 3 The precursor ...

Embodiment 2

[0041] In this example, Ti doped with α-Fe 2 o 3 A method for preparing a nanorod composite MOFs heterojunction photoanode, comprising the following steps:

[0042] 1) To Ti 3 AlC 2 Hydrofluoric acid was slowly added dropwise into the solution, Ti 3 AlC 2 The solid-to-liquid mass ratio with hydrofluoric acid is 1:10, and the stirring is continued for 36 hours to obtain Ti 3 C 2 solution;

[0043] 2) Ti will be obtained 3 C 2 The solution was cleaned by centrifugation with deionized water, and dried in a vacuum oven to obtain Ti 3 C 2 powder;

[0044] 3) 1 mass part of ferric chloride hexahydrate, 0.02 mass part of Ti 3 C 2 and 0.5 parts by mass of urea were dissolved in 50 parts by mass of deionized water and stirred for 20 min to obtain Ti-doped α-Fe 2 o 3 precursor solution;

[0045] 4) Conductive glass is placed in the reactor, the conductive surface of the conductive glass faces the inner wall of the reactor; then the Ti doped α-Fe 2 o 3 The precursor sol...

Embodiment 3

[0050] In this example, Ti doped with α-Fe 2 o 3 A method for preparing a nanorod composite MOFs heterojunction photoanode, comprising the following steps:

[0051] 1) To Ti 3 AlC 2 Hydrofluoric acid was slowly added dropwise into the solution, Ti 3 AlC 2 The solid-to-liquid mass ratio with hydrofluoric acid is 1:20, and the stirring is continued for 48 hours to obtain Ti 3 C 2 solution;

[0052] 2) Ti will be obtained 3 C 2 The solution was cleaned by centrifugation with deionized water, and dried in a vacuum oven to obtain Ti 3 C 2 powder;

[0053] 3) 0.75 parts by mass of ferric chloride hexahydrate, 0.03 parts by mass of Ti 3 C 2 and 0.3 parts by mass of urea were dissolved in 50 parts by mass of deionized water, and stirred for 30 min to obtain Ti-doped α-Fe 2 o 3 precursor solution;

[0054] 4) Conductive glass is placed in the reactor, the conductive surface of the conductive glass faces the inner wall of the reactor; then the Ti doped α-Fe 2 o 3 The p...

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Abstract

The invention discloses a Ti-doped α-Fe 2 o 3 Nanorod composite MOFs heterojunction photoanode and its preparation method and application, the method comprises the following steps: 1) Ti 3 AlC 2 Stirred reaction with hydrofluoric acid to give Ti 3 C 2 solution; 2) Ti 3 C 2 The solution was centrifugally cleaned and dried to obtain Ti 3 C 2 powder; 3) Ti 3 C 2 Powder, ferric chloride hexahydrate, and urea are dissolved in water to obtain Ti-doped α‑Fe 2 o 3 Precursor solution; 4) α-Fe 2 o 3 Precursor solution undergoes hydrothermal reaction to obtain Ti-FeOOH nanorod array; 5) Calcining Ti-FeOOH nanorod array to obtain Ti-doped α-Fe 2 o 3 Nanorod array; 6) Ti-doped α-Fe 2 o 3 Nanorod arrays undergo chemical vapor deposition to obtain Ti-doped α‑Fe 2 o 3 Nanorod composite MOFs heterojunction photoanode. The present invention in α-Fe 2 o 3 In situ growth of MOFs layers on nanorod arrays by α‑Fe 2 o 3 The nanorod array structure improves the directional transport ability of electrons, and reduces the recombination probability of photogenerated electrons and holes through the MOFs layer, which significantly improves the photoelectrocatalytic performance.

Description

technical field [0001] The invention relates to the technical field of photoanodes, in particular to a Ti-doped α-Fe2O3 nanorod composite MOFs heterojunction photoanode and its preparation method and application. Background technique [0002] At present, the main energy consumed by the world is coal, oil, and natural gas-based fossil energy. Judging from the total amount of existing fossil energy in the world, with the current consumption and expected consumption growth rate, the depletion of fossil energy has become an inevitable fact. The forecast data shows that most of the fossil energy will be exhausted in this century. Therefore, the development of clean new energy has become the consensus of all countries in the world. As a resource-rich and recyclable natural energy, solar energy has many advantages, such as universal availability, green and harmless, compared with fossil energy. At present, the conversion and utilization of solar energy are mainly through photothe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20
CPCH01G9/20H01G9/2022H01G9/2027Y02E10/542
Inventor 何漩肖丰田盼汪花丽吴海洋陈辉方伟李薇馨赵雷
Owner WUHAN UNIV OF SCI & TECH
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