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Loaded graphite phase carbonized nitrogen composite material as well as preparation method and application thereof

A composite material, graphite phase technology, applied in a new composite nanocatalyst and its application in the reduction of p-nitrophenol, can solve the problem of difficulty in obtaining highly dispersed and stable precious metal nanoparticles and the like

Inactive Publication Date: 2016-06-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is often difficult to obtain highly dispersed and stable noble metal nanoparticles using these conventional supports

Method used

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  • Loaded graphite phase carbonized nitrogen composite material as well as preparation method and application thereof
  • Loaded graphite phase carbonized nitrogen composite material as well as preparation method and application thereof
  • Loaded graphite phase carbonized nitrogen composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Dissolve 2 g of melamine in 80 ml of deionized water, and heat to 80° C. until completely dissolved to form a uniform and transparent solution A.

[0032] 2) Add 1.5ml of concentrated hydrochloric acid with a concentration of 30wt% into solution A, stir for 30 minutes and mix evenly to form mixed solution B.

[0033] 3) Stir the above mixed solution at a constant temperature of 80° C. until all the white solids are precipitated, and grind it into powder A.

[0034] 4) Place the obtained white powder sample A in a 50ml crucible, place it in a muffle furnace and heat it to 500°C, heat and condense for 2 hours, place it at 80°C for a certain period of time, take it out, and cool it down to room temperature naturally After that, the light yellow product obtained is porous graphite phase nitrogen carbide.

Embodiment 2

[0036] (1) Dissolve 2 g of melamine in 80 ml of deionized water, and heat to 80° C. until completely dissolved to form a uniform and transparent solution A.

[0037] (2) Add 1.5ml of concentrated hydrochloric acid with a concentration of 30wt% into solution A, stir for 30 minutes and mix evenly to form mixed solution B.

[0038] (3) Stir the above mixed solution at a constant temperature of 80° C. until all the white solid is precipitated, and grind it into powder A.

[0039] (4) Place the obtained white powder sample A in a 50ml crucible, place it in a muffle furnace and heat it to 500°C, heat and condense for 2 hours, place it at 80°C for a certain period of time, take it out, and cool it naturally to After room temperature, the light yellow product is porous graphite phase nitrogen carbide.

[0040] (5) With the porous graphite phase nitrogen carbide (mpg-C obtained in the above steps 3 N 4 ) as a template, 100mg of mpg-C 3 N 4 Add it into a mixed solution of 20ml of eth...

Embodiment 3

[0048] (1) Dissolve 2 g of melamine in 80 ml of deionized water, and heat to 80° C. until completely dissolved to form a uniform and transparent solution A.

[0049] (2) Add 1.5ml of concentrated hydrochloric acid with a concentration of 30wt% into solution A, stir for 30 minutes and mix evenly to form mixed solution B.

[0050] (3) Stir the above mixed solution at a constant temperature of 80° C. until all the white solid is precipitated, and grind it into powder A.

[0051] (4) Place the obtained white powder sample A in a 50ml crucible, place it in a muffle furnace and heat it to 500°C, heat and condense for 2 hours, place it at 80°C for a certain period of time, take it out, and cool it naturally to After room temperature, the light yellow product is porous graphite phase nitrogen carbide.

[0052] (5) With the porous graphite phase nitrogen carbide (mpg-C obtained in the above steps 3 N 4 ) as a template, 100mg of mpg-C 3 N 4 Add it to 20ml of isopropanol and water m...

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Abstract

The invention belongs to a loaded graphite phase carbonized nitrogen composite material and discloses a noble metal (Ag and Au) loaded composite nano-catalysis material and application thereof in catalytic reduction of p-nitrophenol. According to a preparation method, a two-step process synthetic technique is utilized, hydrochloric acid with a certain concentration is utilized for processing a melamine raw material, porous graphite graphite phase carbonized nitrogen is synthesized by virtue of high-temperature condensation, then an ultraviolet light reduction technique is utilized for loading metal nano-particles into a matrix or ducts of graphite graphite phase carbonized nitrogen, and finally Ag noble metal nano-particles with uniform sizes distribution and sizes and the diameters of 20nm-30nm are obtained. The composite material can be circularly utilized and has adjustable noble metal loading capacity and the recovery economy; the catalyst presents stable and excellent catalytic activity in the catalytic reduction of p-nitrophenol.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation technology and environmental protection, and specifically relates to a novel composite nanocatalyst loaded with precious metals and capable of recycling and its application in catalytic reduction of p-nitrophenol. Background technique [0002] p-Nitrophenol (4-NP) is a phenolic organic pollutant that is difficult to treat in industrial wastewater, and it has a very toxic effect on human body and aquatic organisms. The degradation of p-nitrophenol has been reported, and the reduction of p-nitrophenol to p-nitrophenol is a good and very attractive measure; another aspect is the importance of the product of this reaction, 4-AP Especially remarkable. p-aminophenol, the structural formula contains two functional groups, so it belongs to both aromatic amines and phenols, the English name is 4-aminophenol, referred to as 4-AP or PAP, and the molecular formula is C 6 h 7 NO is a very important c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/70C02F101/38
CPCC02F1/70B01J27/24C02F2101/38B01J35/60B01J35/613B01J35/651
Inventor 李东升胡付超侯东芳乔秀清田逢雨
Owner CHINA THREE GORGES UNIV
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