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Preparation method and application of poly[2-(3-thienyl)ethanol]/graphite-phase carbon nitride composite visible-light-induced photocatalyst

A graphite phase carbon nitride and thiophene-based technology, applied in the field of photocatalysis, can solve the problems of weak effect and unsatisfactory visible light catalytic hydrogen production performance, and achieve the goal of promoting transfer, improving visible light catalytic hydrogen production performance, and high chemical stability Effect

Active Publication Date: 2020-09-22
HEILONGJIANG UNIV
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  • Claims
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Problems solved by technology

[0005] The present invention provides a poly[2-(3-thienyl)ethanol] / graphite phase in order to solve the technical problem of unsatisfactory visible light catalytic hydrogen production performance due to the weak interaction between existing polymer semiconductor heterojunction interfaces. Preparation method and application of carbon nitride composite visible light catalyst

Method used

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  • Preparation method and application of poly[2-(3-thienyl)ethanol]/graphite-phase carbon nitride composite visible-light-induced photocatalyst

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specific Embodiment approach 1

[0058] Specific embodiment one: the preparation method of a kind of poly[2-(3-thienyl)ethanol] / graphite-phase carbon nitride composite visible light catalyst in this embodiment is carried out according to the following steps:

[0059] 1. Preparation of graphite phase carbon nitride: 35g of urea is added into a quartz crucible, and then put into a muffle furnace for calcination. The calcination process is: heating from room temperature to 550°C at a heating rate of 0.5°C / min, and then Insulate at this temperature for 3 hours, then cool to room temperature, grind the obtained pale yellow blocky solid, take 1 g of it, wash it with 100 mL of nitric acid solution with a concentration of 0.5 mol / L, then wash it with distilled water until neutral, filter it with suction, and put it at 60 Dry at ℃ to obtain graphite phase carbon nitride with hydroxyl groups on the surface, denoted as CN;

[0060] 2. Preparation of poly[2-(3-thienyl)ethanol]: ①Add 200 μL of 2-(3-thienyl)ethanol monomer...

specific Embodiment approach 2

[0062] Specific embodiment two: the preparation method of a kind of poly[2-(3-thienyl)ethanol] / graphite phase carbon nitride composite visible light catalyst in the present embodiment is carried out according to the following steps:

[0063] 1. Preparation of graphite phase carbon nitride: 35g of urea is added into a quartz crucible, and then put into a muffle furnace for calcination. The calcination process is: heating from room temperature to 550°C at a heating rate of 0.5°C / min, and then Insulate at this temperature for 3 hours, then cool to room temperature, grind the obtained pale yellow blocky solid, take 1 g of it, wash it with 100 mL of nitric acid solution with a concentration of 0.5 mol / L, then wash it with distilled water until neutral, filter it with suction, and put it at 60 Dry at ℃ to obtain graphite phase carbon nitride with hydroxyl groups on the surface, denoted as CN;

[0064] 2. Preparation of poly[2-(3-thienyl)ethanol]: ①Add 200 μL of 2-(3-thienyl)ethanol ...

specific Embodiment approach 3

[0066] Specific embodiment three: the preparation method of a kind of poly[2-(3-thienyl)ethanol] / graphite-phase carbon nitride composite visible light catalyst in the present embodiment is carried out according to the following steps:

[0067] 1. Preparation of graphite phase carbon nitride: 35g of urea is added into a quartz crucible, and then put into a muffle furnace for calcination. The calcination process is: heating from room temperature to 550°C at a heating rate of 0.5°C / min, and then Insulate at this temperature for 3 hours, then cool to room temperature, grind the obtained pale yellow blocky solid, take 1 g of it, wash it with 100 mL of nitric acid solution with a concentration of 0.5 mol / L, then wash it with distilled water until neutral, filter it with suction, and put it at 60 Dry at ℃ to obtain graphite phase carbon nitride with hydroxyl groups on the surface, denoted as CN;

[0068] 2. Preparation of poly[2-(3-thienyl)ethanol]: ①Add 200 μL of 2-(3-thienyl)ethano...

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Abstract

The invention discloses a preparation method and application of a poly[2-(3-thienyl)ethanol] / graphite-phase carbon nitride composite visible-light-induced photocatalyst, and belongs to the technical field of photocatalysis. The invention aims to solve the technical problem of non-ideal visible light catalytic hydrogen production performance caused by weak interface interaction of the existing polymer semiconductor heterojunction. The preparation method comprises the following steps: synthesizing graphite-phase carbon nitride by adopting a method of calcining urea at high temperature, synthesizing poly[2-(3-thienyl)ethanol] by adopting a chemical oxidation method, and preparing the poly[2-(3-thienyl)ethanol] / graphite-phase carbon nitride composite visible-light-induced photocatalyst by adopting a wet chemical method. Tests prove that the prepared composite visible-light-induced photocatalyst has high visible-light-induced catalytic hydrogen production performance and good cycling stability, and the visible-light hydrogen production rate of the composite visible-light-induced photocatalyst reaches up to 2475.1 [mu]mol / g / h and is about 13 times that of graphite-phase carbon nitride; through a visible light hydrogen production test for 15 hours in three cycles, the hydrogen production amount is not obviously changed. The composite visible-light-induced photocatalyst can be used forhydrogen production through visible-light catalytic decomposition of water in the field of environmental energy.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a poly[2-(3-thienyl)ethanol] / graphite phase carbon nitride composite visible light catalyst. Background technique [0002] The rapid development of the world is accompanied by the aggravation of environmental pollution and energy crisis. People urgently need to develop new technologies to provide clean and cheap renewable energy. The energy density of hydrogen is the highest besides nuclear energy, coupled with the advantages of environmental friendliness and no secondary pollution, hydrogen is considered to be the renewable clean energy with the most development potential. Hydrogen is abundant in the environment and is widely found in water, hydrocarbons such as methane, and some polymers. A major challenge in utilizing hydrogen as a renewable clean energy is how to efficiently extract hydrogen from these compounds or p...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/00C01B3/04
CPCB01J31/069C01B3/042C01B2203/1088B01J35/39Y02E60/36
Inventor 秦川丽赵琦李永国欣
Owner HEILONGJIANG UNIV
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