• 专利标题:   Preparing metal nano-particle reduced graphene oxide Janus nanosheets by mixing liquid paraffin and GO nano sheet water-dispersed solution with oil-water, emulsifying, adding precursor chloroauric acid or palladium chloride solution, photodepositing under xenon lamp irradiation and dispersing.
  • 专利号:   CN114768802-A, CN114768802-B
  • 发明人:   CHEN Y, WANG K, LI Z, LV G
  • 专利权人:   UNIV NANJING TECHNOLOGY
  • 国际专利分类:   B01J021/18, B01J023/44, B01J023/52, B01J037/34, C02F001/30, C02F101/30, C02F101/34, C02F101/38, C07C213/02, C07C217/84
  • 专利详细信息:   CN114768802-A 22 Jul 2022 B01J-023/52 202282 Chinese
  • 申请详细信息:   CN114768802-A CN10493031 07 May 2022
  • 优先权号:   CN10488605

▎ 摘  要

NOVELTY - Preparing metal nano-particle reduced graphene oxide (MNP-rGO) Janus nanosheets comprises mixing the liquid paraffin and GO nano sheet water-dispersed aqueous solution with oil-water, melting the paraffin, emulsifying, immediately ice bath to solidify the paraffin in the mixed solution, removing the large solid paraffin without emulsification, obtaining the dispersed aqueous solution of paraffin micro-sphere wrapped by GO nano sheet, which is oil-in-water type GO nano sheet Pickering emulsion, adding the precursor chloroauric acid or palladium chloride solution of the synthetic metal nano-particles into the GO nano sheet Pickering emulsion, carrying out photodeposition under xenon lamp irradiation, stirring at 400 revolutions/minute, reacting for 3 hours, using petroleum ether to remove paraffin microsphere Pickering emulsion template, using water and ethanol to centrifugally wash the prepared gold/PdNP-rGO Janus nano sheet, and dispersing in ultra-pure water for use. USE - The method is useful for preparing metal nano-particle reduced graphene oxide (MNP-rGO) Janus nanosheets. ADVANTAGE - The method: is economical, simple and efficient, and has high controllability. DETAILED DESCRIPTION - Preparing metal nano-particle reduced graphene oxide (MNP-rGO) Janus nanosheets comprises mixing the liquid paraffin and GO nano sheet water-dispersed aqueous solution with oil-water in volume ratio of 1:1, where GO nano sheet concentration is 0.05 g/l, using 80℃ water bath to melt the paraffin, using homogenizing dispersion machine to high speed emulsify at 30000 revolutions/minute for 1 minute, immediately ice bath to solidify the paraffin in the mixed solution, removing the large solid paraffin without emulsification, obtaining the dispersed aqueous solution of paraffin micro-sphere wrapped by GO nano sheet, which is oil-in-water type GO nano sheet Pickering emulsion, adding the precursor chloroauric acid or palladium chloride solution of the synthetic metal nano-particles into the GO nano sheet Pickering emulsion, carrying out photodeposition under xenon lamp irradiation, stirring at 400 revolutions/minute, reacting for 3 hours, using petroleum ether to remove paraffin microsphere Pickering emulsion template under the action of ultrasonic, using water and ethanol to centrifugally wash the prepared gold/PdNP-rGO Janus nano sheet, and dispersing in ultra-pure water for use. INDEPENDENT CLAIMS are also included for: a metal nanoparticle-reduced graphene oxide (MNP-rGO) Janus nanosheet prepared by above preparation method; and use method of the metal nano-particle reduced graphene oxide (MNP-rGO) Janus nanosheets to the catalytic hydrogenation of p-nitroanisole and the photocatalytic degradation reaction of Nile Red comprising performing hydrogenation of p-nitroanisole catalyzed by Pickering emulsion with PdNP-rGO Janus nanosheet concentration of 0.05 g/l and droplet size of 0.1-1 mm, reacting to reach the conversion of p-nitroanisole to 80% after 0.5 minutes, where the conversion of p-nitroanisole is 75% in the 5th catalytic cycle or performing hydrogenation of p-nitroanisole catalyzed by Pickering emulsion with AuNP-rGO Janus nanosheet concentration of 0.05 g/l and droplet size of 0.1-1 mm, reacting to reach the conversion of p-nitroanisole to 80% after 10 minutes. The photocatalytic degradation rate of Nile Red at 25 minutes in the photocatalytic degradation of Nile Red with a concentration of 0.05 g/l of AuNP-rGO Janus nanosheets and a droplet size of 0.1-1 mm in Pickering emulsion with a concentration of 10 mg/l of Nile Red is 56%, and the photocatalytic degradation rate of Nile Red reached 72% when the reaction is 45 minutes. In the fifth catalytic cycle, the photocatalytic degradation rate of Nile Red is 70%.