▎ 摘　　要

NOVELTY - Preparation of iron-oxide-graphene oxide-hexagonal boron nitride composite by hydrothermal method involves (a) dissolving predetermined amount of graphene oxide in predetermined volume of distilled water, and stirring and ultrasonically processing for predetermined time to form a solution (A), (b) dissolving predetermined amount of hexagonal boron nitride in predetermined volume of distilled water, and stirring and ultrasonically processing for predetermined time to form a solution (B), and (c) mixing the solution (A) and the solution (B), ultrasonically processing for predetermined time, autoclaving at predetermined temperature for predetermined temperature for predetermined time, cooling to room temperature, centrifuging to obtain a residue, washing with ethanol and drying at predetermined temperature to obtain graphene oxide-hexagonal boron nitride composite. USE - Preparation of iron-oxide-graphene oxide-hexagonal boron nitride composite (claimed) used in chemosensors for molecular recognition. Uses include but are not limited to chiral amino acids, chiral amino alcohol, carboxylic acid, vitamin, enzyme, nucleic acid, urea, and blood. ADVANTAGE - The method produces iron-oxide-graphene oxide-hexagonal boron nitride composite which determines the chemosensing ability of the prepared composite by UV, fluorescence, and electrochemical method to find suitability for chemosensing application. DETAILED DESCRIPTION - Preparation of iron-oxide-graphene oxide-hexagonal boron nitride (FeO-GO-hBN) composite by hydrothermal method involves (a) dissolving predetermined amount of graphene oxide in predetermined volume of distilled water, and stirring and ultrasonically processing for predetermined time to form a solution (A), (b) dissolving predetermined amount of hexagonal boron nitride in predetermined volume of distilled water, and stirring and ultrasonically processing for predetermined time to form a solution (B), (c) mixing the solution (A) and the solution (B), ultrasonically processing for predetermined time, autoclaving at predetermined temperature for predetermined temperature for predetermined time, cooling to room temperature, centrifuging to obtain a residue, washing with ethanol and drying at predetermined temperature to obtain graphene oxide-hexagonal boron nitride composite, (d) mixing predetermined amount of graphene oxide-hexagonal boron nitride composite with predetermined amount of iron (II) oxide for predetermined time to obtain a mixture, and (e) adding predetermined volume of distilled water to the mixture of step (d) and stirred for predetermined time at a rate of predetermined rotation per minute (RPM), autoclaving at predetermined temperature for predetermined time, cooling to room temperature, and centrifuging and washing the obtained residue with ethanol, and drying at predetermined temperature.