Preparation method for synthesizing gold nanoparticles with different particle sizes by carbon black direct reduction one-step method
A gold nanoparticle and carbon black technology, applied in the field of nanomaterials, can solve the problems of difficult particle size control, complicated operation steps, etc., and achieve the effects of low cost, wide material sources, and improved biocompatibility
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Embodiment 1
[0021] A one-step direct reduction of carbon black to synthesize gold nanoparticles with different particle sizes, using XC-72 carbon black as a reducing agent, by adjusting XC-72 carbon black and HAuCl 4 Mass ratio, AuNPs with controllable size, good dispersion and biocompatibility are obtained by one-step hydrothermal method under neutral, acidic or alkaline conditions, and are prepared according to the following steps:
[0022] First take 10 mL 2 mg mL -1 XC-72 carbon black was ultrasonically dispersed for 30 min and then added to the polytetrafluoroethylene reactor, followed by adding 20 mL of 2wt% HAuCl 4 , after mixing evenly, hydrothermal reaction at 120 °C, 140 °C, 160 °C, 180 °C, 200 °C for 2 h to obtain the product;
[0023] The product was filtered through a 0.22 μm syringe filter for 3 times, centrifuged at 1000 rpm for 10 min, washed alternately with water and absolute ethanol three times, and redispersed in water to obtain a well-dispersed AuNPs solution.
[0...
Embodiment 2
[0027] A kind of carbon black direct reduction one-step method synthesizes gold nanoparticles of different particle diameters, is similar to embodiment 1, is prepared according to the following steps:
[0028] First take 10 mL 2 mg mL -1 XC-72 carbon black was ultrasonically dispersed for 30 min and then added to the polytetrafluoroethylene reactor, followed by adding 20 mL of 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% of HAuCl 4 , after mixing evenly, hydrothermal reaction at 180°C for 2 h to obtain the product;
[0029] The product was filtered three times through a 0.22 μm syringe filter, centrifuged at 1000 rpm for 10 min, washed with water and absolute ethanol three times, and then redispersed in water to obtain a well-dispersed AuNPs solution.
[0030] Such as image 3 As shown, when XC-72 carbon black and HAuCl 4 When the mass ratio is 1:5, the particle size of the prepared AuNPs is about 10 nm ( image 3 A); when XC-72 carbon black and HAuCl 4 When the mass ratio is...
Embodiment 3
[0033] A kind of carbon black direct reduction one-step method synthesizes gold nanoparticles of different particle diameters, is similar to embodiment 1, is prepared according to the following steps:
[0034] First, take 10 mL of 2 mg mL -1 XC-72 carbon black was ultrasonically dispersed for 30 min and then added to the polytetrafluoroethylene reactor, followed by adding 20 mL of 2 wt% HAuCl 4 , after mixing evenly, set the temperature at 180 ℃ for hydrothermal reaction for 1 h, 2 h, 3 h, 4 h, 5 h to obtain the product;
[0035] The product was filtered three times through a 0.22 μm syringe filter, centrifuged at 1000 rpm for 10 min, washed with water and absolute ethanol three times, and then redispersed in water to obtain a well-dispersed AuNPs solution.
[0036] In order to verify the good biocompatibility of the AuNPs prepared by the present invention, the experiment used the method of the present invention XC-72 carbon black and classic citric acid as the reducing agen...
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