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Visible light response type platinum/black phosphorus/ oxygen-deficient bismuth tungstate composite material and preparation method and application thereof

A composite material, bismuth tungstate technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low photocatalytic efficiency, narrow light absorption, difficult synthesis, etc., to increase the specific surface area. , the effect of easy availability of raw materials and simple preparation method

Active Publication Date: 2020-05-19
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the studied materials either suffer from low photocatalytic efficiency, narrow light absorption, or difficult synthesis
Finding photocatalysts especially for broadband solar absorption covering the near-infrared band remains a formidable challenge

Method used

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  • Visible light response type platinum/black phosphorus/ oxygen-deficient bismuth tungstate composite material and preparation method and application thereof
  • Visible light response type platinum/black phosphorus/ oxygen-deficient bismuth tungstate composite material and preparation method and application thereof
  • Visible light response type platinum/black phosphorus/ oxygen-deficient bismuth tungstate composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of two-dimensional black phosphorus materials

[0035] Disperse 20 mg of bulk black phosphorus material into 25 ml of N-methylpyrrolidone, and perform ultrasonic crushing for 4 days with a cell pulverizer at a power of 400 watts to obtain a two-dimensional black phosphorus N-methylpyrrolidone solution.

[0036] attached Figure 4 And attached Figure 5 They are the SEM image and TEM image of two-dimensional black phosphorus, respectively. It can be seen from the pictures that the black phosphorus presents a thin sheet structure.

[0037] 2. Preparation of platinum-modified two-dimensional black phosphorus materials

[0038] Dissolve 3 mg of black phosphorus nanosheets in 20 ml of ethanol and 30 ml of water, add 0.2 g of sodium dodecylbenzenecyclonate, stir at room temperature for 20 minutes, add 50 microliters of ammonia water during the stirring process, and 100 microliters Formaldehyde solution and 0.1 ml of 0.1 mol / L potassium chloroplatinite soluti...

Embodiment 2

[0049] Example 2: Hydrogen production experiment by photolysis of water

[0050] The LabSolar-3AG (PerfectLight-Beijing) photocatalytic hydrogen production system was used for photolysis of water to produce hydrogen; 20 mg of platinum / black phosphorus / oxygen-deficient bismuth tungstate composites were dispersed in 10 ml of triethanolamine as a pore sacrificial agent and 90 Add 3% chloroplatinic acid hexahydrate as a cocatalyst to the mixed solution formed by 1 ml of water, and then ultrasonically disperse the mixed solution evenly. The solution was thoroughly degassed to remove air before starting the hydrogen evolution reaction. Using a 300W xenon lamp as the light source, the hydrogen production rate under visible light irradiation was detected by an online gas chromatograph.

[0051] attached Figure 9 The effect diagram of photocatalytic hydrogen production of platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material, attached Figure 10 The photoc...

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Abstract

The invention discloses a preparation method of a visible light response type platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material, which comprises the following steps of: (1) heating and stirring a two-dimensional black phosphorus nanosheet and a potassium chloroplatinite solution under the protection of nitrogen, and adding ammonia water and a formaldehyde solution toobtain an ethanol solution of the platinum-modified two-dimensional black phosphorus nanosheet, (2) putting the bismuth tungstate nanosheet into a sodium hydroxide solution, and stirring to obtain anoxygen-deficient bismuth tungstate nanosheet, and (3) mixing the oxygen-deficient bismuth tungstate nanosheet with an ethanol solution of the platinum-modified two-dimensional black phosphorus nanosheet, and stirring to obtain the platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material. The invention also discloses the visible light response type platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material prepared by the method and application thereof. The visible light response type platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material has the advantages of high light absorption efficiency, favorable catalytic effect and stable performance, can be repeatedly utilized, and has a high-efficiency photocatalytic effect on hydrogen production by photolysis of water.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a visible light-responsive platinum / black phosphorus / oxygen-deficient bismuth tungstate composite material, its preparation method and its application in the field of new energy. Background technique [0002] With the aggravation of environmental pollution and energy shortage, renewable new energy technologies have attracted more attention nowadays. Hydrogen (H 2 ) has been considered as the most promising new energy candidate for development. Since Fujishima Showa and Honda Kenichi first reported the achievement of titanium dioxide photoanode water splitting in 1972, photocatalytic water splitting is considered to be a clean, low-cost, and feasible hydrogen production strategy. So far, great efforts have been made in developing various semiconductor photocatalysts for efficient water splitting. However, most conventional semiconductors such as TiO 2 have a wide ...

Claims

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Application Information

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IPC IPC(8): B01J27/188B01J37/06C01B3/04
CPCB01J27/188B01J37/06C01B3/042B01J35/39Y02E60/36
Inventor 胡俊蝶陈操李长明
Owner SUZHOU UNIV OF SCI & TECH
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