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TiO2-Ti3C2-CoSx nanocrystal photocatalyst and preparation method thereof

A tio2-ti3c2-cosx, nanocrystal technology, which is applied in the field of semiconductor photocatalyst preparation, can solve the problems of limited transport, separation and utilization efficiency of photogenerated carriers, limited hydrogen evolution efficiency, etc. Efficiency, the effect of improving transmission and utilization efficiency

Inactive Publication Date: 2019-03-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hydrogen evolution efficiency is greatly limited due to the limited transport, separation, and utilization efficiency of photogenerated carrier pairs.

Method used

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  • TiO2-Ti3C2-CoSx nanocrystal photocatalyst and preparation method thereof
  • TiO2-Ti3C2-CoSx nanocrystal photocatalyst and preparation method thereof
  • TiO2-Ti3C2-CoSx nanocrystal photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Amorphous TiO 2 Preparation: Add 5 mL of isopropyl titanate to 100 mL of methanol, stir at room temperature for 5 minutes, slowly add 2.5 mL of deionized water dropwise while stirring, and wait until the titanium salt is fully hydrolyzed to form a milky white suspension. Liquid centrifugation to obtain a white precipitate, and then the white precipitate was washed with ethanol for 2 to 3 times, and then washed with deionized water, and then the white precipitate was dried at 50 ° C to obtain amorphous TiO 2 .

[0025] (2) Ti 3 C 2 Preparation of: 0.5 g Ti was stripped with 5 mL of HF (49 wt%) 3 AlC 2 The Al layer in the solution was stirred at room temperature for 6 hours. After the Al layer was completely peeled off, the black suspension was centrifuged to obtain a black precipitate, and then the black precipitate was washed with deionized water for 4 to 5 times, and then the precipitate was placed in the Dry at 60°C to get Ti 3 C 2 .

[0026] (3) TiO 2 -T...

Embodiment 2

[0029] (1) Amorphous TiO 2 Preparation: Add 10mL of isopropyl titanate to 100mL of methanol, stir at room temperature for 10min, slowly add 20ml of deionized water dropwise while stirring, until the titanium salt is fully hydrolyzed, a milky white suspension is formed, and the suspension Centrifuge to obtain a white precipitate, then wash the white precipitate with ethanol for 2 to 3 times, then wash with deionized water, and then dry the white precipitate at 80°C to obtain amorphous TiO 2 .

[0030] (2) Ti 3 C 2 Preparation: 0.5 g Ti was exfoliated with 10 mL of HF (49 wt%) 3 AlC 2 The Al layer in the solution was stirred at room temperature for 24 hours. After the Al layer was completely peeled off, the black suspension was centrifuged to obtain a black precipitate, and then the black precipitate was washed with deionized water for 4 to 5 times, and then the precipitate was placed in the Dry at 80°C to get Ti 3 C 2 .

[0031] (3) TiO 2 -Ti 3 C 2 -CoS x Preparatio...

Embodiment 3

[0034] (1) Amorphous TiO 2 Preparation: Add 10mL tetrapropyl titanate to 100mL methanol, stir at room temperature for 15min, slowly add 40ml deionized water dropwise while stirring, wait until the titanium salt is fully hydrolyzed, a milky white suspension is formed, and the suspension Centrifuge to obtain a white precipitate, then wash the white precipitate with ethanol for 2 to 3 times, then wash with deionized water, and then dry the white precipitate at 100°C to obtain amorphous TiO 2 .

[0035] (2) Ti 3 C 2 Preparation of: 0.5 g Ti was stripped with 10 mL of HF (49 wt%) 3 AlC 2 The Al layer in the solution was stirred at room temperature for 35 hours. After the Al layer was completely peeled off, the black suspension was centrifuged to obtain a black precipitate, and then the black precipitate was washed with deionized water for 4 to 5 times, and then the precipitate was placed in the Dry at 100°C to get Ti 3 C 2 .

[0036] (3) TiO 2 -Ti 3 C 2 -CoS x Preparati...

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Abstract

The invention belongs to the field of preparation of nanometer materials and particularly relates to a TiO2-Ti3C2-CoSx nanocrystal photocatalyst and a preparation method of the TiO2-Ti3C2-CoSx nanocrystal photocatalyst. ZIF-67 is taken as a template, a high-conductivity substance is used as a charge transfer bridge, and a TiO2-Ti3C2-CoSx heterostructure with the constrained nanocrystal size is prepared in one step through the solvothermal technique. The transfer and utilization efficiencies of a photoproduction carrier pair in a TiO2 are improved through the co-loading of the ZIF-67 derived CoSx and Ti3C2, meanwhile, the problem of easy aggregation of the TiO2 at the high temperature is solved, and the defect of weaker photocatalytic hydrogen generation property is overcome. In addition, the reaction condition is mild, the costs of the materials are low, the operation is simple, the requirement on equipment is low, and the theoretical and technical support is provided for designing andpreparing the efficient green photocatalyst.

Description

technical field [0001] The invention relates to the technical field of preparation of semiconductor photocatalysts, in particular to the preparation of TiO by one-step method using solvothermal technology 2 -Ti 3 C 2 -CoS x Nanocrystalline photocatalysts. Prepared TiO 2 -Ti 3 C 2 -CoS x Nanocrystalline photocatalysts have the advantages of high crystallinity and good photocatalytic hydrogen production performance. Background technique [0002] Photocatalytic hydrogen evolution reaction (HER) based on semiconductor photocatalysis technology is considered to be one of the most effective ways to realize clean hydrogen energy. Among various photocatalysts, TiO 2 It has been extensively studied due to its strong oxidizing properties, environmental friendliness, and long-term photocatalytic stability. However, its hydrogen evolution efficiency is greatly limited due to the limited transport, separation, and utilization efficiency of photogenerated carrier pairs. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J37/03B01J37/34B01J37/08C01B3/04B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C01B3/042B01J27/22B01J37/031B01J37/086B01J37/343B01J35/39Y02E60/36
Inventor 刘福田赵佳慧李魁
Owner UNIV OF JINAN
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