Reduced graphene oxide, C nanotubes and C black were deposited on silicone fibers by sol-gel method and used for microextn. of 4-ClC6H4 OH from aq. soins. The adsorbed 4-ClC6H4OH was then detd. by gas chromatog. The rate of adsorption of 4-CIC6H4OH was the highest in case of reduced graphene oxide and lowest on the C black. The adsorption equil. was described by Langmuir isotherm. The C black showed the highest adsorption capacity. The prepd. fibers were more efficient than the corn. polydimethylsiloxane and polyactylate ones.