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Black phosphorus/ZnIn2S4 composite visible-light-driven photocatalyst and preparation method thereof

A composite catalyst, znin2s4 technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc., can solve the problems of inhibition, fast recombination of photogenerated carriers, and low charge separation efficiency, and achieve effective The effects of separation, high photocatalytic activity, and simple and easy-to-operate synthesis method

Inactive Publication Date: 2019-10-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure ZnIn 2 S 4 The catalyst still has the disadvantages of fast photogenerated carrier recombination, low charge separation efficiency, and limited light absorption range, which inhibit its photocatalytic water splitting hydrogen production activity to a certain extent.

Method used

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  • Black phosphorus/ZnIn2S4 composite visible-light-driven photocatalyst and preparation method thereof
  • Black phosphorus/ZnIn2S4 composite visible-light-driven photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Black phosphorus dispersion was prepared by ultrasonic exfoliation. The specific process was as follows: weigh 20 mg block black phosphorus crystals, grind them into powder in a mortar, mix them with 30 mL N-methylpyrrolidone into a 100 mL beaker, add 0.6 g NaOH stirred until dissolved. Place the beaker in an ice-water bath at 10-15°C for ultrasonic peeling with a power of 180 W and a peeling time of 3 h. Centrifuge the stripping solution at 3000 rpm, take 2 / 3 of the supernatant, continue to centrifuge at 14000 rpm at high speed, wash the precipitate with distilled water for 3 times, and redisperse the obtained black solid in 20 mL of deionized water to obtain uniform black phosphorus Dispersion (0.2 mg / mL);

[0025] (2) Preparation of petal-shaped ZnIn by hydrothermal method 2 S 4 , the specific process is: weigh ZnCl according to the molar ratio of 1:2:4 2 , InCl 3 4H 2 O. Put thioacetamide (TAA) and 60 mL of distilled water in a 100 mL beaker, stir until di...

Embodiment 2

[0028] (1) The black phosphorus dispersion liquid prepared by ultrasonic stripping method is the same as that in Example 1;

[0029] (2) Preparation of petal-shaped ZnIn by hydrothermal method 2 S 4 With embodiment 1;

[0030] (3) New type black phosphorus / ZnIn 2 S 4 The preparation of the composite catalyst, the specific process is: weighing ZnIn 2 S 4 Catalyst 100 mg, measure black phosphorus dispersion 1.25 mL, black phosphorus dispersion and ZnIn 2 S 4 The catalyst was mixed in 50 mL of closed aqueous solution, ultrasonically dispersed for 30 min, vacuumed and mechanically stirred continuously for 12 h, centrifuged at 14,000 rpm, and finally dried overnight at 60°C in vacuum to obtain 0.25% black phosphorus / ZnIn 2 S 4 Composite catalyst. Weigh different masses of 0.25% black phosphorus / ZnIn 2 S 4 composite catalyst (3 # : 10mg, 4 # : 20 mg), dispersed in 100 mL of water and added chloroplatinic acid (10 mg / mL, 28 uL) to carry out the hydrogen production test o...

Embodiment 3

[0032] (1) The black phosphorus dispersion liquid prepared by ultrasonic stripping method is the same as that in Example 1;

[0033] (2) Preparation of petal-shaped ZnIn by hydrothermal method 2 S 4 With embodiment 1;

[0034] (3) New type black phosphorus / ZnIn 2 S 4 The preparation of the composite catalyst, the specific process is: weighing ZnIn 2 S 4 Catalyst 100 mg, measure black phosphorus dispersion 2.5 mL, black phosphorus dispersion and ZnIn 2 S 4 The catalyst was mixed in 50 mL of closed aqueous solution, ultrasonically dispersed for 30 min, vacuumed and mechanically stirred continuously for 12 h, centrifuged at 14,000 rpm, and finally dried in vacuum at 60°C overnight to obtain 0.5% black phosphorus / ZnIn 2 S 4 Composite catalyst. Weigh different masses of 0.5% black phosphorus / ZnIn 2 S 4 composite catalyst (5 # : 10 mg, 6 # : 20 mg), dispersed in 100 mL of water and added chloroplatinic acid (10 mg / mL, 28 uL) to carry out the hydrogen production test of ...

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Abstract

Belonging to the technical field of semiconductor photocatalysis, the invention in particular relates to a black phosphorus / ZnIn2S4 composite visible-light-driven photocatalyst and a preparation method thereof. The invention adopts novel two-dimensional layered black phosphorus and shape controllable petal-shaped ZnIn2S4 as the catalyst, and close interfacial combination of the black phosphorus and ZnIn2S4 can be realized through continuous mechanical mixing. The composite catalyst has the characteristics of good dispersity, strong interfacial interaction, excellent hydrogen production performance and the like. The efficient performance of the composite catalyst in water photolysis for hydrogen production benefits from the effective inhibition of photoelectron-hole between black phosphorusand ZnIn2S4and effective separation of photoinduced charge. At the same time, the black phosphorus / ZnIn2S4 composite catalyst is easy to recover, still shows high activity after repeated recycling, and meets the requirements of green economy.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, and specifically relates to a black phosphorus / ZnIn used for efficient photolysis of water to produce hydrogen 2 S 4 Composite visible light catalyst and preparation method thereof. Background technique [0002] Hydrogen energy is an energy substance that is environmentally friendly, non-polluting, and has a high calorific value. It has been recognized by many countries as one of the cleanest energy sources in the future. With people's longing for a green "low-carbon life", more and more attention has been paid to environmentally friendly hydrogen production technology. However, in terms of hydrogen energy production, the most widely used method is the cracking of hydrocarbon fossil energy substances such as natural gas. This process is essentially a process that consumes known energy, and at the same time, it is essential to cause energy conversion waste. Some special hyd...

Claims

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Application Information

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IPC IPC(8): B01J27/14B01J35/02C01B3/04
CPCB01J27/14C01B3/042C01B2203/0277B01J35/00B01J35/30B01J35/39Y02E60/36
Inventor 戴维林张全
Owner FUDAN UNIV
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