US 12,252,402 B2
Apparatus and method for plasma synthesis of graphitic products including graphene
Dale Andrew Pennington, Cambridge (GB); Aaron Robert Clayton, Cambridge (GB); Katarzyna Luiza Juda, Cambridge (GB); Catharina Paukner, Cambridge (GB); Lukasz Kurzepa, Cambridge (GB); Robert Henry St. John Cooper, Cambridge (GB); Krzysztof Kazimierz Koziol, Cambridge (GB); and Jerome Yi-Zhe Joaug, Cambridge (GB)
Assigned to Levidian Nanosystems Limited, Cambridge (GB)
Filed by Levidian Nanosystems Limited, Camrbidge (GB)
Filed on Sep. 25, 2023, as Appl. No. 18/473,674.
Application 18/473,674 is a continuation of application No. 15/318,377, granted, now 11,802,052, previously published as PCT/GB2015/051745, filed on Jun. 12, 2015.
Claims priority of application No. 1410639 (GB), filed on Jun. 13, 2014.
Prior Publication US 2024/0010499 A1, Jan. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H05H 1/46 (2006.01); B01D 46/02 (2006.01); B01J 19/08 (2006.01); B01J 19/12 (2006.01); C01B 32/184 (2017.01)
CPC C01B 32/184 (2017.08) [B01D 46/023 (2013.01); B01J 19/088 (2013.01); B01J 19/126 (2013.01); B01J 19/129 (2013.01); H05H 1/46 (2013.01); B01J 2219/0869 (2013.01); B01J 2219/0875 (2013.01); B01J 2219/0892 (2013.01); C01B 2204/04 (2013.01); H05H 1/4622 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An apparatus for plasma synthesis of graphitic products including graphene, the apparatus comprising:
a reaction chamber having an exit at a bottom of the reaction chamber;
a plasma nozzle coupled to the reaction chamber;
a gas supply for supplying a process gas comprising a carbon-containing species to the plasma nozzle; and
a source of radio frequency radiation for supplying radio frequency radiation to the process gas within the plasma nozzle in use, so as to produce a plasma within the plasma nozzle in use, and thereby cause cracking of the carbon-containing species;
wherein the plasma nozzle is arranged such that, in use, an afterglow of the plasma extends into the reaction chamber, the cracked carbon-containing species also passes into the reaction chamber, and the cracked carbon-containing species recombines within the afterglow, so as to form graphitic products including graphene; and
wherein the apparatus further comprises a gas filtration system attached above the reaction chamber, for collecting solid graphitic products including graphene from the gas phase, the gas filtration system including a filter arranged such that, in use, solid graphitic products including graphene collected by the filter fall down, through the reaction chamber, for extraction through the exit at the bottom of the reaction chamber.