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Nickel single-active site graphite-phase carbon nitride-based photocatalytic material as well as preparation method and application thereof

A technology of graphitic carbon nitride and photocatalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc. Promote catalytic ability and other issues to achieve the effect of reducing production costs, improving efficiency, and improving the response to visible light

Inactive Publication Date: 2019-03-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, noble metal co-catalysts are usually introduced into g-C by post-loading methods such as photoreduction deposition 3 N 4 the surface of the particles, the dispersion tends to be poor, g-C 3 N 4 The carrier transport efficiency between the substrate and the Pt co-catalyst is low, and it is difficult to give full play to the catalytic promotion ability of each Pt atom

Method used

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  • Nickel single-active site graphite-phase carbon nitride-based photocatalytic material as well as preparation method and application thereof
  • Nickel single-active site graphite-phase carbon nitride-based photocatalytic material as well as preparation method and application thereof
  • Nickel single-active site graphite-phase carbon nitride-based photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Mix 10g urea with 100mg NiCl 2 ·6H 2 O was added to 50ml of deionized water, and stirred at room temperature to completely dissolve the two to form a mixed solution. Next, the above mixed solution was evaporated and concentrated to 10 ml at a constant temperature of 70° C., and then placed in liquid nitrogen and quickly frozen into ice. After the mixed solution ice is further pulverized and finely ground, it is placed in a freeze dryer to dry overnight, and excess solvent is removed to obtain the mixed precursor powder. The obtained precursor powder was transferred to a corundum crucible, and calcined at 550°C for 2 hours to obtain a nickel single active site graphite phase carbon nitride-based photocatalytic material, which was designated as CN-Ni-100;

[0041] Through nitrogen adsorption-desorption experiments, the specific surface area of ​​CN-Ni-100 was measured to be 172.9m 2 / g;

[0042] Add 50 mg of the obtained sample to a mixed solution of 100 ml of water a...

Embodiment 2

[0044] Mix 10g urea with 50mg NiCl 2 ·6H 2 O was added to 50ml of deionized water, and stirred at room temperature to completely dissolve the two to form a mixed solution. Next, the above mixed solution was evaporated and concentrated to 10 ml at a constant temperature of 70° C., and then placed in liquid nitrogen and quickly frozen into ice. After the mixed solution ice is further pulverized and finely ground, it is placed in a freeze dryer to dry overnight, and excess solvent is removed to obtain the mixed precursor powder. The obtained precursor powder was transferred to a corundum crucible, and calcined at 550°C for 2 hours to obtain a nickel single active site graphite phase carbon nitride-based photocatalytic material, which was designated as CN-Ni-050;

[0045] Through nitrogen adsorption-desorption experiments, the specific surface area of ​​CN-Ni-50 was measured to be 144.4m 2 / g;

[0046] Add 50 mg of the obtained sample to a mixed solution of 100 ml of water and...

Embodiment 3

[0048] Mix 10g urea with 130mg NiCl 2 ·6H 2 O was added to 50ml of deionized water, and stirred at room temperature to completely dissolve the two to form a mixed solution. Next, the above mixed solution was evaporated and concentrated to 10 ml at a constant temperature of 70° C., and then placed in liquid nitrogen and quickly frozen into ice. After the mixed solution ice is further pulverized and finely ground, it is placed in a freeze dryer to dry overnight, and excess solvent is removed to obtain the mixed precursor powder. The obtained precursor powder was transferred to a corundum crucible, and calcined at 550°C for 2 hours to obtain a nickel single active site graphite phase carbon nitride-based photocatalytic material, which was designated as CN-Ni-130;

[0049] Through nitrogen adsorption-desorption experiments, the specific surface area of ​​CN-Ni-130 was measured to be 102.6m 2 / g;

[0050] Add 50 mg of the obtained sample to a mixed solution of 100 ml of water a...

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Abstract

The invention relates to a Nickel single-active site graphite-phase carbon Nitride-based photocatalytic material as well as a preparation method and application thereof, in the photocatalytic material, Ni is dispersed in a g-C3N4 framework in a single-atom-level degree to form active sites, and the molar content of the Ni is 1-5%. the nickel single-active site graphite-phase carbon nitride-based photocatalytic material has a large specific surface area, is good in dispersion in an aqueous solution, and can effectively inhibit the recombination of photo-generated carriers, the reaction activitysites of the surface of the g-C3N4 are increased, the photocatalytic hydrogen production efficiency can be remarkably improved, and the photocatalytic reaction activity of the g-C3N4 can be improved.

Description

technical field [0001] The invention relates to a new type of photocatalytic material in which metal is dispersed in carbon nitride skeleton at the single atomic level, in particular to a new type of nickel single active site graphite phase carbon nitride based photocatalytic material and its preparation and application, belonging to Environmental catalytic materials and nanomaterials technology field. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) has become one of the most promising photocatalysts due to its visible light responsivity, suitable energy band structure, good stability, simple preparation and low cost, and has aroused great interest of researchers. However, g-C 3 N 4 It can only absorb sunlight with a wavelength of less than 450nm, and there are also problems such as high recombination probability of photogenerated carriers, and its solar energy conversion efficiency is still not ideal. In order to further enhance the g-C 3 N 4 Vario...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C01B3/04
CPCC01B3/042B01J27/24C01B2203/0277C01B2203/1088C01B2203/1058B01J35/39B01J35/613B01J35/615Y02E60/36
Inventor 金锡雄张玲霞施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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