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ag/pani/graphene composite photocatalyst and its preparation method and application

A graphene composite and photocatalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve obstacles to applications, metal nanoparticles are easily oxidized and Reunion and other problems, to achieve the effect of reducing production cost, simple preparation method and good repeatability

Active Publication Date: 2021-11-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single metal nanoparticle is easily oxidized and agglomerated, which greatly hinders its application in the field of photocatalysis, and the introduction of other materials to improve its stability and dispersion can effectively solve the above problems

Method used

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  • ag/pani/graphene composite photocatalyst and its preparation method and application
  • ag/pani/graphene composite photocatalyst and its preparation method and application
  • ag/pani/graphene composite photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of graphene

[0032] First, take the banana peel and dry it in a blast drying oven until it is completely dry, then crush it into banana peel powder, and put it in a tube furnace for pre-carbonization under a nitrogen atmosphere at a rate of 5°C / min from room temperature. The temperature was raised to 500°C by program, and kept at 500°C for 1 hour, and then naturally cooled to room temperature. Weigh 5g of the pre-carbonized powder and mix it with 10g of potassium carbonate (activator) evenly and grind it, then perform the second calcination activation under nitrogen atmosphere, program the temperature from room temperature to 1100°C at a rate of 5°C / min, and Keep warm for 2 hours, then cool down to room temperature naturally. Mix the powder after secondary calcination with 100ml of 0.1mol / L dilute hydrochloric acid, stir for 5 minutes, let stand for 24 hours, wash with deionized water until neutral, and dry at 60°C for 12 hours to obtain biomass few-la...

Embodiment 2

[0042] (1) Preparation of graphene

[0043] With embodiment 1.

[0044] (2) Preparation of Ag / PANI / graphene composite photocatalyst

[0045] Weigh 10mg (1) of the obtained graphene and disperse it in 10ml of deionized water, and ultrasonicate for 10min to obtain dispersion A; mix dispersion A with 0.92g (0.9ml) ANI and 8ml (1mol / L) of AgNO 3 Add to the reaction container and mix, vacuumize and fill the reactor with nitrogen, repeat 3 times, and use a balloon to maintain the nitrogen atmosphere; place it under a full-light light source (300w Xe lamp), irradiate for 10h, and magnetically stir; after the reaction is completed, the liquid is centrifuged, The product in the lower layer was removed, washed with water and alcohol three times each, and dried in vacuum for 6 hours to obtain Ag / PANI / graphene composite photocatalyst 2#Ag / PANI / graphene.

[0046] (3) Determination of photocatalytic activity

[0047] Gained photocatalyst simulates sunlight hydrogen production process an...

Embodiment 3

[0050] (1) Preparation of graphene

[0051] With embodiment 1.

[0052] (2) Preparation of Ag / PANI / graphene composite photocatalyst

[0053] Weigh 10mg of the graphene obtained in (1) and disperse it in 10ml of deionized water, and ultrasonicate for 10min to obtain dispersion D; add dispersion D and 0.92g (0.9ml) ANI into the reaction vessel and mix, vacuumize and fill the reactor with nitrogen , repeated 3 times, using a balloon to maintain its nitrogen atmosphere; placed under a full-light source (300w Xe lamp), irradiated for 10 hours, and magnetically stirred; after the irradiation was completed, 8ml (1mol / L) of AgNO was added 3 , magnetically stirred and reacted for 10 hours; after the reaction was completed, the liquid was centrifuged, and the lower layer product was removed, washed with water and alcohol three times, and dried in vacuum for 6 hours to obtain the Ag / PANI / graphene composite photocatalyst, namely 3#Ag / PANI / graphene.

[0054] (3) Determination of photocat...

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Abstract

The invention discloses an Ag / PANI / graphene composite photocatalyst and its preparation method and application. The preparation method adopts a photoinitiation method to coat sheet-like polyaniline on graphene and load nano-silver particles. The initiation method comprises placing the mixture of aniline ANI, silver nitrate solution and graphene or the mixture of ANI and silver nitrate solution or graphene under a full light source for irradiation under stirring conditions. The invention adopts the photopolymerization method to prepare the ternary composite material, realizes the in-situ polymerization of aniline and the reduction of silver nanoparticles in one step, and the preparation method is simple and repeatable; the Ag / PANI / graphene composite photocatalyst provided by the invention realizes It ensures better dispersion of nanoparticles and better photocatalytic activity; by calcining banana peel twice, I 2D / G Up to 0.8 few-layer graphene material; compared with other carbon sources, the use of banana peel can effectively reduce production costs by turning waste into treasure.

Description

technical field [0001] The invention belongs to the technical field of environmental material synthesis, and in particular relates to an Ag / PANI / graphene composite photocatalyst and its preparation method and application. Background technique [0002] Photocatalytic technology has attracted widespread attention due to its applications in air purification, sewage degradation, self-cleaning and sterilization, water splitting for hydrogen production, and carbon dioxide reduction. Plasmon photocatalysis is a new type of high-efficiency photocatalysis technology that has attracted much attention in recent years. It has recently been proved that the surface plasmon resonance of metals (mainly silver and gold) also shows important application prospects in photocatalysis. Based on this, the surface plasmon effect of noble metal nanoparticles such as Au, Ag, and Cu can promote the separation of photogenerated holes and electrons, thereby effectively improving the photocatalytic effic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C01B3/04
CPCB01J31/069C01B3/042C01B2203/0277C01B2203/1082B01J35/39Y02E60/36
Inventor 王婷婷吴丹刘望喜
Owner SOUTH CHINA UNIV OF TECH
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