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Preparation method of porous carbon nitride photocatalyst

A catalyst and carbon light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of not being green and environmentally friendly, increasing the cost of preparation, etc., to achieve simple and easy operation of the preparation process, and enhance the photocurrent response effect of ability

Active Publication Date: 2018-12-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current preparation of porous carbon nitride usually requires the preparation of SiO with regular morphology 2 As a hard template agent, the template is then etched with highly corrosive hydrofluoric acid, or the bulk carbon nitride is etched with strong acid and strong alkali, which undoubtedly increases the preparation cost and is not environmentally friendly.

Method used

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  • Preparation method of porous carbon nitride photocatalyst
  • Preparation method of porous carbon nitride photocatalyst
  • Preparation method of porous carbon nitride photocatalyst

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Effect test

Embodiment 1

[0029] The preparation of melamine, the immediate precursor of carbon nitride, was performed as follows: 1.0 g of melamine was weighed and placed in a 20 mL ceramic crucible and the lid of the crucible was closed. Then the crucible was placed in a tube furnace, and the temperature was programmed to 350 °C at a rate of 2 °C / min under a dry air atmosphere with a flow rate of 100 mL / min. After keeping for 4 h, it was allowed to cool naturally to room temperature to prepare a white Melalamine block. Subsequently, the calcined melamine block material is placed in an agate mortar and thoroughly ground to obtain a melamine powder material. Then weigh 0.50 g of melamine powder material and spread it evenly to the bottom area of ​​1050 mm 2 In the ceramic ark (size 21*50*15 mm). Afterwards, the flattened melamine powder material was put into the tube furnace again, and the temperature was programmed to 500°C at a rate of 4°C / min under a dry pure oxygen atmosphere with a flow rate of ...

Embodiment 2

[0031] The preparation of melamine, the immediate precursor of carbon nitride, was performed as follows: 6.0 g of melamine was weighed and placed in a 50 mL ceramic crucible and the crucible was covered. Then the crucible was placed in a tube furnace, and the temperature was programmed to 390 °C at a rate of 5 °C / min under a dry air atmosphere with a flow rate of 200 mL / min. After keeping for 6 h, it was allowed to cool naturally to room temperature to prepare a white Melalamine block. Subsequently, the calcined melamine block material is placed in an agate mortar and thoroughly ground to obtain a melamine powder material. Then weigh 0.30 g of melamine powder material and spread it evenly to the bottom area of ​​1050 mm 2 In the ceramic ark (size 21*50*15 mm). Afterwards, the flattened melamine powder material was placed in the tube furnace again, and the temperature was programmed to 520 °C at a rate of 5 °C / min under a dry pure oxygen atmosphere with a flow rate of 300 mL / ...

Embodiment 3

[0033] The preparation of melamine, the direct precursor of carbon nitride, was carried out as follows: 2.0 g of melamine was weighed and placed in a 20 mL ceramic crucible and the lid of the crucible was closed. Then the crucible was placed in a tube furnace, and the temperature was programmed to 390 °C at a rate of 5 °C / min under a dry air atmosphere with a flow rate of 300 mL / min. After keeping for 4 h, it was allowed to cool naturally to room temperature to prepare a white Melalamine block. Subsequently, the calcined melamine block material is placed in an agate mortar and thoroughly ground to obtain a melamine powder material. Then weigh 0.50 g of melamine powder material and spread it evenly to the bottom area of ​​1050 mm 2 In the ceramic ark (size 21*50*15 mm). Afterwards, the flattened melamine powder material was placed in the tube furnace again, and the temperature was programmed to 550 °C at a rate of 5 °C / min under a dry pure oxygen atmosphere with a flow rate o...

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Abstract

The invention belongs to the technical field of photocatalytic material preparation, and relates to a preparation method of a porous carbon nitride photocatalyst. The method concretely comprises the following steps: (1) putting melamine in a ceramic crucible and heating to a certain temperature in a tube furnace to obtain a carbon nitride precursor; (2) collecting the obtained carbon nitride precursor, grinding, and then weighing a certain amount to be horizontally paved in a ceramic ark; and (3) putting the ark, which is loaded with the carbon nitride precursor, into the tube furnace, and calcining in a pure oxygen atmosphere to obtain a porous carbon nitride material. The method has the advantages that the preparation process is simple and easy to operate, and any template agents and corrosive chemical reagents such as strong acid and strong base are not adopted, thereby being green and environment-friendly; the prepared porous carbon nitride photocatalyst has an enlarged specific surface area and shows good photocatalytic water decomposition hydrogen generating performance and light current responsiveness, and the used raw materials are cheap, easy to obtain and convenient for volume production.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a porous carbon nitride photocatalyst and a preparation method thereof. Background technique [0002] With the growth of population and the development of society, human beings consume more and more energy on the earth. At present, the world's energy demand mainly comes from non-renewable fossil energy such as coal, oil, and natural gas. The reserves of fossil energy on the earth are very limited. According to the current population growth rate and energy consumption rate, if new energy sources that can replace fossil energy are not developed, mankind will face a very severe energy crisis in the next few decades. At the same time, the combustion of fossil fuels inevitably brings environmental pollutants, such as: SO x , NO x , dust (PM), volatile organic pollutants and toxic heavy metal pollution. Among them, the most serious is the CO ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24C01B2203/1041C01B2203/0277B01J35/39Y02E60/36
Inventor 李华明黄树全徐远国许晖陈烽颜佳景立权
Owner JIANGSU UNIV
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