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High-visible-light-activity sulfur-modified carbon nitride photocatalyst as well as synthetic method and application of photocatalyst

A synthesis method and visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve the problems of low activity, high electron-hole recombination rate, small visible light absorption coefficient, etc., and achieve improved separation. Efficiency, reduced fluorescence intensity, increased visible light absorption effect

Inactive Publication Date: 2014-07-16
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the problem of low activity of the existing graphite-phase carbon nitride photocatalyst due to its small visible light absorption coefficient and high electron-hole recombination rate, and provides a sulfur-modified carbon nitride with high visible light activity Synthesis method and application of photocatalyst

Method used

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  • High-visible-light-activity sulfur-modified carbon nitride photocatalyst as well as synthetic method and application of photocatalyst
  • High-visible-light-activity sulfur-modified carbon nitride photocatalyst as well as synthetic method and application of photocatalyst
  • High-visible-light-activity sulfur-modified carbon nitride photocatalyst as well as synthetic method and application of photocatalyst

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specific Embodiment approach 1

[0016] Specific embodiment one: the synthetic method of a kind of sulfur-modified carbon nitride photocatalyst with high visible light activity of this embodiment is carried out according to the following steps:

[0017] 1. Put melamine and sublimated sulfur in an agate mortar and grind until they are evenly mixed to obtain a mixed powder; the mass ratio of melamine to sublimated sulfur is 1: (0.5-2);

[0018] 2. Put the mixed powder obtained in step 1 into a porcelain boat, put it into a tube furnace, and set the temperature of the tube furnace at a rate of 5°C / min to 15°C / min under an argon atmosphere. After the room temperature is raised to 550-650° C., the temperature is maintained at 550-650° C. for 1 h to 4 h, and then cooled to room temperature under an argon atmosphere to obtain a sulfur-modified carbon nitride photocatalyst.

[0019] The raw materials used in this embodiment are commercially available analytically pure raw materials.

[0020] Sulfur is a common pale ...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of melamine to sublimated sulfur in step 1 is 1:1. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, melamine and sublimed sulfur are ground in an agate mortar for 25 minutes to 35 minutes. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates discloses a high-visible-light-activity sulfur-modified carbon nitride photocatalyst as well as a synthetic method and application of photocatalyst, relating to the technical fields of material preparation and photocatalysis and solving the problem of low activity of an existing graphite-phase carbon nitride catalyst caused by the low visible light absorption coefficient and the large electron hole recombination rate. The synthetic method comprises the following steps: (1) grinding melamine and sublimed sulfur, and uniformly mixing the melamine with the sublimed sulfur so as to obtain mixed powder; (2) filling a combustion boat with the mixed powder obtained in the step (1), putting the combustion boat into a tube furnace, heating the tube furnace from the room temperature to 550-650 DEG C according to a heating rate of 5 DEG C / minute-15 DEG C / minute in the presence of argon, keeping the temperature for 1-4 hours, and cooling the tube furnace to room temperature so as to obtain the sulfur-modified carbon nitride photocatalyst. The sulfur-modified carbon nitride photocatalyst disclosed by the invention can be applied to the fields of producing hydrogen by decomposing water by virtue of visible light and degrading pollutants.

Description

technical field [0001] The invention relates to the technical field of material preparation and photocatalysis, in particular to a synthesis method and application of a sulfur-modified carbon nitride photocatalyst with high visible light activity. Background technique [0002] With the emergence of the energy crisis and the deterioration of the global environment, energy and the environment are major issues that human beings face in the 21st century and need to be resolved urgently. The urgent problem to be solved at present is to explore new energy sources and improve the utilization rate of energy sources. Among the many new energy sources, solar energy is an inexhaustible primary energy source; converting solar energy into storable electrical energy and chemical energy is one of the most interesting research topics. Hydrogen energy is a clean and efficient renewable energy, which has been generally considered as an ideal green energy in the new century. Using solar ener...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04C02F1/30
CPCY02E60/36
Inventor 陈刚何芳于耀光郝素娥周彦松郑毅韩钟慧
Owner HARBIN INST OF TECH
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