CN103862061A

CN103862061A - Ultraviolet light catalyzed green gold nanometer particle synthesis method

Info

Publication number: CN103862061A
Application number: CN201410095324.8A
Authority: CN
Inventors: 张磊; 徐子晨; 陈平; 林列
Original assignee: Nankai University
Current assignee: Nankai University
Priority date: 2014-03-14
Filing date: 2014-03-14
Publication date: 2014-06-18
Anticipated expiration: 2034-03-14
Also published as: CN103862061B

Abstract

The invention provides an ultraviolet light catalyzed green gold nanometer particle synthesis method, which belongs to the technical field of precious metal nanometer particle synthesis and solves the problems of high cost, great pollution, strong toxicity, harsh condition and the like of the traditional method for preparing gold nanometer particles. The method provided by the invention comprises the following steps that yew tree extract is added into chloroauric acid solution (1mM), 500W ultraviolet lamp irradiation is carried out, and gold nanometer particles can be obtained. The method has the advantages that green effects are realized, the speed is high, the operation is simple and convenient, and the prepared gold nanometer particles have uniform particle size. In the method, used raw materials are yew tree wood shavings and can be obtained from waste materials in Chinese yew artware processing factories and paclitaxel processing and purification factories, the cost can be reduced, in addition, industrial waste materials are utilized, and resources are saved.

Description

A kind of method of the synthetic golden nanometer particle of green of ultraviolet catalytic

Technical field

The invention belongs to noble metal nano particles synthesis technical field.

Background technology

Golden nanometer particle is as other noble metal nano particles, attracted people's common concern with its unique photoelectron and physicochemical properties, it, all has a wide range of applications as biological medicine, catalytic reaction, bio-sensing, electromagnetic equipment etc. at numerous areas.Although the existing more report of the method for the synthetic golden nanometer particle of chemistry and physical method at present, and can prepare the good golden nanometer particle of geomery, these methods still exist some limitation.For example: utilize the synthetic golden nanometer particle of chemical method conventionally can make some cytotoxic chemical reagent be adsorbed in nanoparticle surface, thereby can hinder its application medically.And biosynthesis have low cost, pollution-free, without using the incomparable advantages of physical chemistry synthetic method such as conditioned disjunction toxic reagent such as HTHP.Recent years, utilize the technology of the synthetic noble metal nano particles of plant, algae, bacterium, fungi by wide coverage, and wherein utilize plant extraction to carry out synthetic method night with its low biohazard, show one's talent without advantages such as complicated culture process, consumption can increase simply in proportion.

Summary of the invention

The present invention seeks to solve prepare the cost existing in the conventional method of golden nanometer particle high, pollute the problems such as large, strong toxicity, condition be comparatively harsh, provide a kind of the method of the synthetic golden nanometer particle of green of ultraviolet catalytic.

The method of the synthetic golden nanometer particle of green of ultraviolet catalytic provided by the invention, concrete steps are:

1st, yew tree extract preparation

After getting 10-15 g yew tree wood chip and rinsing, in 500-750 ml distilled water, repeatedly boil concentratedly, after filtration, make 100-150 ml yew tree extract;

2nd, golden nanometer particle is synthetic

Get yew tree extract prepared by 0.6-1 ml the 1st step and join in 10 ml chlorauric acid solutions (1 mM), obtain golden nanometer particle in the position apart from its 10-20 cm with 500 W ultra violet lamp 15-20 min.

advantage of the present invention and good effect:

The present invention has introduced a kind of method of preparing fast golden nanometer particle with yew tree wood chip extract, and the reaction effect of its catalytic reduction p-nitrophenol is tested.The present invention has advantages of green, quick, easy and simple to handle, the comparatively homogeneous of gold nanometer particle grain size that makes.The raw material that the present invention uses are yew tree wood chips, can from Chinese yew handicraft processing factory, taxol processing purification waste from a factory, obtain, and not only can reduce costs, and utilize industrial waste, have saved resource.

Accompanying drawing explanation

Fig. 1 is the TEM image of the prepared golden nanometer particle of this patent, and engineer's scale is 100 nm.

Fig. 2 adds different volumes yew tree extract fully to react the ultraviolet-ray visible absorbing scan light spectrogram of rear prepared golden nanometer particle.

Fig. 3 is the ultraviolet-ray visible absorbing scan light spectrogram that adds the prepared golden nanometer particle of enough yew tree extract reaction different times.

Fig. 4 is the ultraviolet-ray visible absorbing scan light spectrogram that utilizes the prepared golden nanometer particle catalytic reduction of this patent p-nitrophenol.

Fig. 5 is in the kinetics of utilizing the prepared golden nanometer particle catalytic reduction of this patent p-nitrophenol.

The specific embodiment

embodiment 1:

The method of the synthetic golden nanometer particle of green of ultraviolet catalytic, concrete steps:

Get after the suitable flushing of 10 g yew tree wood chips, in 500 ml distilled water, repeatedly boil, after filtration, make 100 ml yew tree extracts.Get 0.6 ml and add in 10 ml chlorauric acid solutions (1 mM), with 500 W ultra violet lamp 15 min, irradiation distance is 15 cm.Above-mentioned raw materials can increase in proportion.

Yew tree extract contains alkaloid, Flavonoid substances, aldehydes matter, aliphatic acid, protein etc., and mainly as reducing agent and dispersant, uviol lamp is fast reaction speed effectively.In course of reaction, the color that can obviously observe solution due to the formation of golden nanometer particle changes aubergine into by water white transparency, the variation of this color is due to the distinctive surface plasma body resonant vibration of golden nanometer particle (surface plasmon resonance, SPR) character causes, therefore can be according to the formation of the variation monitoring golden nanometer particle of solution colour.

As shown in Figure 1, from TEM image, we can see, golden nanometer particle is mainly spheroidal, and particle diameter is homogeneous comparatively, and diameter is greatly about 10-30 nm left and right.

Fig. 2 adds different amount yew tree extracts abundant reacted uv-vis spectra under ultra violet lamp to 10 ml chlorauric acid solutions (1 mM).Wherein, the addition of yew tree extract is respectively 0.3,0.4,0.5,0.6 and 0.7 ml, and scanning wavelength scope is 200-900 nm.Due to the SPR effect of the golden nanometer particle generating, can produce absworption peak at 540 nm left and right places, can monitor thus the degree that reaction is carried out.

As seen from the figure, compare and add 0.7 ml extract and add 0.6 ml extract, the SPR peak intensity of golden nanometer particle is almost constant, can judge thus and add 0.6 ml can make gold chloride complete reaction.And extract liquid measure hour when adding, and can form larger and anisotropic golden nanometer particle, make its SPR peak that certain blue shift occur.

Fig. 3 adds 1 ml yew tree extract under uviol lamp, to react the uv-vis spectra of different time to 10 mL chlorauric acid solutions (1 mM), and the reaction time is respectively 5,7,10,15 and 20 min, and scanning wavelength scope is 400-700 nm.As seen from the figure, when the SPR peak of golden nanometer particle is compared with 15 min after reaction beginning 20 min, almost do not increase, can judge thus to react and carry out substantially finishing after 15 min.

Next we test golden nanometer particle catalytic performance again, and what we selected is the reaction that utilizes sodium borohydride reduction p-nitrophenol.Reaction temperature is greatly about 20 ° of C left and right.We get 20 μ l and add reaction system from the golden nanometer particle aqueous solution making.

Fig. 4 is the uv-visible absorption spectra figure in course of reaction, and scanning wavelength scope is 260-500 nm, carries out 0,2,4,6,8,10,12 and measure when 14 min respectively in reaction.From figure, can obviously can find out that 300 nm and 400 nm exist two absworption peaks, corresponding product para-aminophenol and reactant p-nitrophenol respectively.There is strong absorption in reaction incipient stages 400 nm place, 300 nm places do not absorb.When question response proceeds to 14 min left and right, the absworption peak at 400 nm places almost disappears completely, and comparatively strong absorption has appearred in 300 nm places, shows that reactant p-nitrophenol is converted into para-aminophenol substantially completely.

Next we test the dynamics of above-mentioned reaction, and monitoring wavelength is 400 nm, and time range is 0-1800 s.As can be seen from Figure 5, the reaction rate that has golden nanometer particle catalysis of red line representative is more a lot of soon than normal reaction speed, and the standby golden nanometer particle of proved patent system has significant catalytic action to reduction p-nitrophenol.

Claims

1. a method for the synthetic golden nanometer particle of the green of ultraviolet catalytic, is characterized in that the concrete steps of the method are:

1st, yew tree extract preparation

2nd, golden nanometer particle is synthetic

Getting yew tree extract prepared by 0.6-1 ml the 1st step, to join 10 ml concentration be in the chlorauric acid solution of 1 mM, obtains golden nanometer particle in the position apart from its 10-20 cm with 500 W ultra violet lamp 15-20 min.