Ruthenium nanoparticle/three-dimensional porous carbon nitride composite material, preparation method and application thereof

A nanoparticle, three-dimensional porous technology, applied in chemical instruments and methods, catalyst activation/preparation, hydrogen/synthesis gas production, etc., can solve problems such as limited application and high price, and achieve reduced recombination rate, high surface atomic ratio, The effect of promoting interfacial charge transport

Inactive Publication Date: 2020-02-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt is currently the most common and effective co-catalyst in the photocatal

Method used

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  • Ruthenium nanoparticle/three-dimensional porous carbon nitride composite material, preparation method and application thereof
  • Ruthenium nanoparticle/three-dimensional porous carbon nitride composite material, preparation method and application thereof
  • Ruthenium nanoparticle/three-dimensional porous carbon nitride composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of 3DCN nanosheets

[0029] The preparation of 3DCN nanosheets adopts thermal polymerization method: Weigh 2.5224g of melamine and 2.5814g of cyanuric acid in a mortar, put them in a beaker after grinding and mixing, add deionized water, stir magnetically at room temperature for 12h, and pass through 6000rad / Centrifuge for 5 min to obtain the lower layer solid, and then freeze-dry in a vacuum freeze dryer for 24 hours to obtain a white cyanuric acid-melamine (CM) supramolecular precursor; subsequently, all the obtained CM supramolecular precursors are poured into a crucible with a lid , transferred to a heating tube furnace with automatic program temperature control, and calcined in air at 550°C for 4h at a heating rate of 5°C / min. Yellow 3DCN solid powder.

Embodiment 2

[0030] Example 2 Preparation of 0.1%Ru / 3DCN composite material

[0031] Ultrafine Ru nanoparticles / 3DCN composites were prepared by solvothermal-assisted polyol reduction method: 0.0998g of 3DCN was dispersed in 60ml of ethylene glycol, and 40μl of 5mg·ml was pipetted with a pipette gun. -1 RuCl 3 ethylene glycol solution, then add 0.0007g CTAB, and obtain a uniform and stable suspension through ultrasonic treatment for 30min and magnetic stirring for 2h; then transfer the resulting suspension to a polytetrafluoroethylene-lined autoclave In an oven, conduct a hydrothermal reaction at 140°C for 18 hours; after naturally cooling to room temperature, centrifuge at 6,000 rad / min for 5 minutes, wash with deionized water and absolute ethanol three times each, place in a vacuum oven at 60°C, dry for 12 hours, and take it out. Grind to powder with a mortar to obtain 0.1%Ru / 3DCN composite material.

Embodiment 3

[0032] Preparation of Example 3 0.5% Ru / 3DCN composite material

[0033]Ultrafine Ru nanoparticles / 3DCN composites were prepared by solvothermal-assisted polyol reduction method: 0.0990 g of 3DCN was dispersed in 60 ml of ethylene glycol, and 200 μl of 5 mg ml was pipetted with a pipette gun. -1 RuCl 3 ethylene glycol solution, then add 0.0035g CTAB, after ultrasonic treatment for 30min and magnetic stirring for 2h to obtain a uniform and stable suspension; then transfer the resulting suspension to a polytetrafluoroethylene-lined autoclave, In an oven, conduct a hydrothermal reaction at 140°C for 18 hours; after naturally cooling to room temperature, centrifuge at 6,000 rad / min for 5 minutes, wash with deionized water and absolute ethanol three times each, place in a vacuum oven at 60°C, dry for 12 hours, and take it out. Grind to powder with a mortar to obtain 0.5%Ru / 3DCN composite material.

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Abstract

The invention relates to an ultrafine ruthenium nanoparticle/three-dimensional porous carbon nitride composite material, a preparation method and application and belongs to the technical field of material preparation and photocatalysis. The ruthenium nanoparticle/three-dimensional porous carbon nitride (Ru/3DCN) composite material is prepared by using a novel solvent thermal assisted polyol reduction method, three-dimensional porous carbon nitride is adopted as a main catalyst and a substrate, ethylene glycol is adopted as a reducing agent and a solvent, CTAB (cetyl trimethyl ammonium bromide)is adopted as a surfactant, Ru nanoparticles are successfully dispersed homogeneously on surfaces of three-dimensional porous carbon nitride nanosheets, the Ru nanoparticle size is 1-2nm, more activesites can be provided, separation of photogenic electrons and holes can be promoted, and agglomeration of nanoparticles can be effectively avoided, so that the composite photocatalytic material has excellent visible catalytic hydrogen production performance, and when the load capacity of the Ru nanoparticles is 1wt.%, the maximum hydrogen production efficiency is up to 2945.47[mu] mol*h<-1>*g<-1>.

Description

technical field [0001] The invention relates to an ultrafine ruthenium nanoparticle / three-dimensional porous carbon nitride composite material, a preparation method and application, and belongs to the technical field of material preparation and photocatalysis. Background technique [0002] Semiconductor photocatalytic water splitting hydrogen production technology can convert solar energy with low energy density into hydrogen energy with high energy density, so it has important applications in solving energy crisis and environmental pollution problems. In the past few decades, researchers at home and abroad have continuously devoted themselves to the synthesis of new and efficient semiconductor photocatalytic materials. Composite semiconductor photocatalysts contain two or more components, and their properties are unique or diverse, so they have greater advantages compared with single semiconductor materials. [0003] Among many semiconductor materials, graphite-like carbon...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/16B01J37/08B01J35/10B01J37/34C01B3/04
CPCB01J27/24B01J35/004B01J35/1004B01J37/0036B01J37/082B01J37/16B01J37/343C01B3/042C01B2203/0277C01B2203/1064Y02E60/36
Inventor 孟素慈安鹏飞陈敏姜德立李娣徐箐
Owner JIANGSU UNIV
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