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Polycarbazole loaded cobalt hybrid material and preparation method and application thereof

A hybrid material, polycarbazole technology, applied in the field of catalytic chemistry, can solve problems such as inability to realize reuse, and achieve high conversion efficiency and green and mild reaction conditions

Active Publication Date: 2020-08-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a typical cheap metal catalyst, cobaloxime has been widely used in the photocatalytic hydrogen evolution reaction. However, cobaloxime is mostly in a homogeneous state in the catalytic system and cannot be reused.

Method used

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  • Polycarbazole loaded cobalt hybrid material and preparation method and application thereof
  • Polycarbazole loaded cobalt hybrid material and preparation method and application thereof
  • Polycarbazole loaded cobalt hybrid material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add polycarbazole CNP (100 mg) to the 2 ·6H 2 O (60 mg) and dimethylglyoxime (68 mg) in hot ethanol (30 mL), and the resulting mixture was stirred at reflux in air for 12 hours, then cooled to room temperature; the resulting brown precipitate was collected by centrifugation, Washing with ethanol and ether in sequence, and drying in vacuum at room temperature, the corresponding polycarbazole-supported cobalt hybrid material (Co / CNP) was obtained, which was used in Example 2.

[0048] ICP analysis showed that the cobalt loading was 13.76 wt%.

[0049] Figure 1 to Figure 4 The following are the photoelectron spectroscopy of cobalt, the photoelectron spectroscopy of nitrogen, the solid NMR carbon spectrum, and the element distribution diagram of the above-mentioned polycarbazole-supported cobalt hybrid material; the photoelectron spectroscopy of cobalt shows that the main form of cobalt is trivalent cobalt; the comparison metal Photoelectron spectra of nitrogen before a...

Embodiment 2

[0051] The photocatalyst powder Co / CNP (15 mg) was dispersed in 27 mL of 0.5 M HBF 4 CH 3 CN solution and TEOA (3 mL, 10 vol%) in the photocatalytic reactor. Then, after ultrasonic dispersion for 30 minutes, nitrogen was blown into the resulting suspension for 30 minutes to remove air. Then connect the reaction vessel to a glass-enclosed gas system (Labsolar-6A from Beijing Pofilai Technology Co., Ltd.). Under nitrogen, a 300 W xenon lamp (> 400 nm) was used on the top of the reactor to irradiate the reaction temperature through a circulating condensing device. Controlled at 15°C. The amount of hydrogen produced was determined by on-line gas chromatography (Techcomp GC7900) using argon as carrier gas with a TCD detector. After 5 hours of reaction, the photocatalytic hydrogen production efficiency of Co / CNP was 410 μmol g -1 h -1 , corresponding to a photocatalytic hydrogen production efficiency of 58 μmol g for CNP alone -1 h -1 . Using the catalyst D in the existing C...

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Abstract

The invention discloses a polycarbazole loaded cobalt hybrid material and a preparation method and application thereof. Specifically, the polycarbazole loaded cobalt oxime hybrid material is preparedby a post-modification coordination method, and cobalt is uniformly dispersed on a substrate polycarbazole material. The material can catalyze a hydrogen evolution reaction under an illumination condition, and has the characteristics of high efficiency, green and mild reaction conditions and the like. After the conversion reaction is finished, the catalyst is separated from the system and put intothe next round of reaction, the catalyst can still keep stable after being circulated for three times, and the catalytic activity of the catalyst is not obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of catalytic chemistry, and relates to a carbazole polymer-loaded cobalt hybrid material and a preparation method and application thereof. Background technique [0002] Energy and environmental issues are important problems facing society today. Developing clean energy and reducing the use of fossil fuels can optimize the existing energy structure and is an effective way to solve energy problems. Among them, hydrogen energy is a very green renewable resource. Hydrogen energy is burned to provide energy and only water is produced as a by-product. It is an environmentally friendly energy source. However, the generation and storage of hydrogen gas is an important problem currently facing. Among the many hydrogen production methods, the photocatalytic hydrogen evolution reaction is a relatively green and economical way, which uses solar energy as the driving force to minimize energy consumption. At present, mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C01B3/04
CPCB01J31/183B01J31/1691C01B3/042B01J2531/845C01B2203/0277B01J35/39Y02E60/36
Inventor 李红喜郭斌陈健英
Owner SUZHOU UNIV
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