Thienyl polymer-containing polymer photocatalyst with high photocatalytic water splitting hydrogen production activity and preparation method thereof

A technology of catalytic decomposition and photocatalysis, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of reducing the degree of distortion between molecules and low catalytic hydrogen production Activity and other issues, to achieve the effect of improving coplanarity, high photocatalytic hydrogen production activity, and good effect

Active Publication Date: 2021-11-02
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When AA was used as a sacrificial agent, 36 mmol h -1 g -1 Compared with PyDOBT-1 and PyBS-3, the visible light splitting water hydrogen production activity has been greatly improved, mainly because the introduction of benzene bridge bonds reduces the degree of distortion between molecules, which is conducive to the transmission of electrons, but its The energy band structure is still broad, therefore, it exhibits low catalytic hydrogen production activity under visible light irradiation

Method used

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  • Thienyl polymer-containing polymer photocatalyst with high photocatalytic water splitting hydrogen production activity and preparation method thereof
  • Thienyl polymer-containing polymer photocatalyst with high photocatalytic water splitting hydrogen production activity and preparation method thereof
  • Thienyl polymer-containing polymer photocatalyst with high photocatalytic water splitting hydrogen production activity and preparation method thereof

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Experimental program
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Embodiment 1

[0030] Under nitrogen protection, 20mL N,N-dimethylformamide, 2mL 2mol / L potassium carbonate aqueous solution was added to Reaction of mmol) thiophene-2,5-diboronic acid dipinacol ester, 194.5 mg (0.52 mmol) 3,7-dibromodibenzothiophene sulfone and 25.0 mg (21.6 μmol) tetrakis(triphenylphosphine) palladium In the bottle, heat to 150°C for reflux reaction for 48 hours. After the reaction, cool to room temperature, wash with dichloromethane, methanol and water several times, and dry under vacuum at 100°C for 24 hours to obtain orange-yellow solid powder Py-TP- BTDO, where the n:m molar ratio is 1:4.

Embodiment 2

[0032] Under nitrogen protection, mix 20mL N,N-dimethylformamide, 2mL potassium carbonate solution (2mol L- 1 ) was added to a mixture containing 68.9m (0.13mmol) 1,3,6,8-tetrabromopyrene, 305.8mg (0.78mmol) 2,5-bis(4,4,5,5-tetramethyl-1,3 ,2-dioxaborolan-2-yl)thieno[3,2-b]thiophene, 194.5mg (0.52mmol) 3,7-dibromodibenzothiophene sulfone and 25.0mg (21.6μmol) tetrakis (tri In a reaction flask of phenylphosphine)palladium, heat to 150°C for reflux reaction for 48 hours, cool to room temperature after the reaction, wash with dichloromethane, methanol and water several times, and dry under vacuum at 100°C for 24 hours to obtain red Powdered Py-TTP-BTDO, where the molar ratio of x:y is 1:4.

[0033] The chemical structure of the product prepared in embodiment 1 and embodiment 2 is characterized by infrared spectrum and solid carbon nuclear magnetic spectrum, the results are shown in Figure 1~2 . figure 1 Medium, 1596cm -1 and 1591cm -1 The peak at is due to the vibration of ...

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Abstract

The invention discloses a thienyl polymer-containing photocatalyst with high photocatalytic water splitting hydrogen production activity and a preparation method thereof. The photocatalyst is prepared by adopting a simple ternary copolymerization Suzuki coupling reaction, and the construction unit of the photocatalyst comprises pyrene, thiophene or thiophene derivative and dibenzothiophene sulfone. The pyrenyl monomer and the dibenzothiophene sulfuryl monomer for polymerization have the same polymerizable functional groups and can be subjected to Suzuki coupling reaction with thiophene or thiophene derivative monomers at the same time so as to ensure that pyrenyl units and dibenzothiophene sulfuryl units in the polymer structure are connected through thiophene or thiophene derivative units. The polymer photocatalyst has the characteristics of high photocatalytic hydrogen production activity, high apparent quantum efficiency, narrow optical band gap and continuous and adjustable structure and composition, is simple in preparation process, high in yield and stable in performance, can release hydrogen under sunlight, and can be used in the field of photocatalytic hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic water splitting hydrogen production materials, and in particular relates to a thiophene-based polymer photocatalyst with high photocatalytic water splitting hydrogen production activity and a preparation method thereof. Background technique [0002] The use of solar energy to split water to produce hydrogen is a simple, economical and efficient technical means to convert solar energy into chemical energy, and has been highly concerned by scientists around the world. In recent decades, a lot of scientific research has been carried out around improving the photocatalytic efficiency of semiconductor photocatalysts at home and abroad, and thousands of semiconductor photocatalysts have been developed for the photocatalytic decomposition of water to produce hydrogen / oxygen. [0003] Semiconductor photocatalysts are key materials for the photocatalytic decomposition of water to produce hydrogen us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J35/10C01B3/04C08G61/12
CPCB01J31/063B01J35/1004B01J35/004C01B3/042C08G61/126C08G2261/122C08G2261/3142C08G2261/3223C08G2261/3243C08G2261/411Y02E60/36
Inventor 蒋加兴韩昌志张崇向思慧
Owner SHAANXI NORMAL UNIV
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