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Core-shell structure of ultrathin metal organic framework material UiO-67 coated titanium dioxide nanorod, and preparation method thereof

A metal-organic framework and titanium dioxide technology, applied in nanotechnology, chemical instruments and methods, organic compound/hydride/coordination complex catalysts for materials and surface science, can solve the problem of weakening photoelectric catalytic performance and MOF volume Excessive size, low light utilization efficiency, etc., to achieve the effect of improving charge separation efficiency, improving performance, and simple process

Active Publication Date: 2020-09-01
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

At present, MOF has received extensive attention in the field of photocatalysis, but pure MOF materials have the problem of high "electron-hole" recombination rate, low conductivity, and some MOFs are too large to use light efficiently. , weakened its photocatalytic performance to a certain extent

Method used

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  • Core-shell structure of ultrathin metal organic framework material UiO-67 coated titanium dioxide nanorod, and preparation method thereof
  • Core-shell structure of ultrathin metal organic framework material UiO-67 coated titanium dioxide nanorod, and preparation method thereof
  • Core-shell structure of ultrathin metal organic framework material UiO-67 coated titanium dioxide nanorod, and preparation method thereof

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Embodiment 1

[0035] Example 1: UiO-67 coated TiO 2 Preparation of nanorods

[0036] 1) Preparation of the FTO substrate: Clean the substrate in an ultrasonic bath (ultrapure water, ethanol, acetone, ultrapure water) for 15 minutes in sequence. After cleaning, dry the FTO substrate in an oven at 80°C for 30 minutes ,spare.

[0037] 2) Preparation of hydrochloric acid solution: Dissolve 6 mL of concentrated hydrochloric acid in 6 mL of deionized water, mix and stir for 5 minutes until they are evenly mixed.

[0038] 3) TiO 2 Preparation of precursor solution: 200 μL of isobutyl titanate solution was added dropwise to the solution prepared in step 2), and stirred for 3 hours.

[0039] 4) Add 12 ml of the solution in the above step 3) into the polytetrafluoroethylene lining of the reaction kettle, immerse the pretreated FTO substrate in it, wherein the conductive side is facing down, tighten the lid of the kettle, and put the reaction kettle into 170 ℃ electric blast drying oven, and keep ...

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Abstract

The invention discloses a core-shell structure of an ultrathin metal organic framework material UiO-67 coated titanium dioxide nanorod, and a preparation method thereof. The core-shell structure is used for improving the photoelectrocatalysis performance. A simple one-step hydrothermal method is adopted, firstly, nanorod-shaped titanium dioxide is synthesized on a conductive glass substrate, and then the surface of the titanium dioxide nanorod is coated with an ultrathin UiO-67 nano-shell layer. The preparation method is simple, novel and high in controllability. The synthesized core-shell material of the UiO-67 coated titanium dioxide nanorod is beneficial to photon-generated carrier separation, the photoelectric conversion efficiency is enhanced, the performance of a photoanode for photoelectrocatalytic decomposition of water can be improved, and the core-shell material conforms to the newest requirement range in the aspects of clean energy and sustainable energy.

Description

technical field [0001] The invention relates to the field of preparation of anode materials for photoelectrolysis of water, in particular, to a core-shell nanorod coated with titanium dioxide nanorods by an ultrathin metal organic framework material (UiO-67) and its preparation method and its improvement in photocatalytic performance role. Background technique [0002] Hydrogen is a clean, efficient and renewable new energy source. At present, photocatalytic water splitting is one of the potential methods to obtain hydrogen, and the use of this technology can convert solar energy into green and pollution-free hydrogen energy. In the photoanode part of photoelectrocatalysis, titanium dioxide (TiO 2 ) is one of the most common materials, mainly due to the TiO 2 It has no toxicity, low price, strong corrosion resistance, high stability, complete decomposition, and no secondary pollution. However, TiO 2 The photogenerated "electron-hole" recombination probability is high, a...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04B01J31/22B01J35/02B82Y30/00B82Y40/00
CPCC25B1/04B01J31/2239B82Y30/00B82Y40/00B01J2531/48B01J35/33B01J35/40B01J35/39Y02E60/36
Inventor 田洋王学维
Owner CAPITAL NORMAL UNIVERSITY
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