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  • 专利标题:   Manufacture of graphene nanosheets used for optoelectronic device, involves stirring mixture containing distilled water and paper waste, filtering, soaking obtained residue in mixture of methanol, ethanol and distilled water, heating, pyrolyzing, ball-milling obtained amorphous carbon and pyrolyzing.
  • 专利号:   IN202011017973-A, IN419214-B
  • 发明人:   PANDEY S, KARAKOTI M, DHALI S, TEWARI C, SAHOO N G
  • 专利权人:   PANDEY S, KARAKOTI M, DHALI S, TEWARI C, SAHOO N G
  • 国际专利分类:   B82Y030/00, B82Y040/00, C01B032/19, G06F016/182, H01M004/62
  • 专利详细信息:   IN202011017973-A 31 Dec 2021 B82Y-040/00 202216 Pages: 27 English
  • 申请详细信息:   IN202011017973-A IN11017973 27 Sep 2020
  • 优先权号:   IN11017973

▎ 摘　　要

NOVELTY - Manufacture (100) of graphene nanosheets from paper waste involves stirring (102) a mixture containing distilled water and 8-12 kg paper waste for 1-3 minutes, filtering (104) the mixture using a filtration net and washing the obtained residue, soaking (106) the residue in a mixture (m1) containing methanol, ethanol and distilled water in a ratio of 2:3:25 for 20-40 minutes, heating (108) the residue and the mixture (m1) together for 20-40 minutes at a temperature of 50-70 degrees C, (v) removing the residue from the mixture (m1) and rinsing the residue to prepare (110) a slurry mixture, pyrolyzing (112) the slurry mixture at a temperature of 300-400 degrees C under an inert atmosphere, recovering (114) amorphous carbon as a pyrolysis product (p1), ball-milling (116) the amorphous carbon to obtain an ultrafine powder, pyrolyzing (118) the ultrafine powder at a temperature of 850-950 degrees C and recovering (120) graphene nanosheets as a pyrolysis product (p2). USE - Manufacture of graphene nanosheets used for optoelectronic device e.g. organic solar cell, dye sensitized solar cell and perovskite solar cell for energy conversion and storage applications. ADVANTAGE - The method enables economical, facile, environmentally-friendly and large-scale manufacture of graphene nanosheets having high quality, and desired electrical property and optical property. The method utilizes definite ratio of methanol and ethanol to enhance the molecular trapping of the charges and channelized charge transportation for the application of energy conversion and storage. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of the manufacture of graphene nanosheets. Manufacture of graphene nanosheets (100) Stirring of mixture containing distilled water and paper waste (102) Filtration of mixture (104) Soaking of residue in mixture containing methanol, ethanol and distilled water (106) Heating of residue (108) Preparation of slurry mixture (110) Pyrolysis of slurry mixture (112) Recovery of amorphous carbon (114) Ball-milling of amorphous carbon (116) Pyrolysis of ultrafine powder (118) Recovery of graphene nanosheets (120)