TRITIUM-MARKED NANODIAMONDS AND METHOD OF OBTAINING THEREOF Russian patent published in 2015 - IPC C01B31/06 B82B3/00 B82Y5/00 

FIELD: chemistry.

SUBSTANCE: method of obtaining tritium-marked nanodiamonds by method of thermal activation of tritium includes preparation of water suspension of nanodiamonds with average size of particles not more than 125 nm and content of dispersive phase from 0.15 to 0.6 mg, uniform application of obtained suspension on walls of vessel, which contains placed with possibility of electric current connection tungsten filament for tritium activation, with the following lyophilisation and air removal. In the process of carrying out reaction with atomic tritium temperature of walls of reaction vessel is supported in the range 291- 298 K, with its bottom being cooled to 77 K. Introduction of gaseous tritium and its activation on tungsten filament is carried out for 5-15 sec, after which remaining tritium is removed. Stage of introduction of gaseous tritium and its activation is repeated from one to eight times. Obtained are tritium-marked nanodiamonds, in which tritium is bound with nanodiamond by C-H bond, characterised by specific radioactivity not less than 1 TBq/g.

EFFECT: improvement of characteristics.

3 cl, 3 ex