▎ 摘　　要

NOVELTY - Preparing porous tubular carbon nitride catalyst comprises (1) adding melamine and cyanuric acid into deionized water, and magnetically stirring after ultrasonication at 20-28℃ to obtain mixed solution, (2) adding the mixed solution into hydrothermal reaction kettle and placing in oil bath with magnetic stirring, reacting at 120-200℃ for 8-12 hours, collecting the product by centrifugation, washing thoroughly, and drying at 55-65℃ to obtain the precursor, and (3) placing the precursor in ceramic crucible with lid and placing it in tube furnace, introducing nitrogen, raising the temperature to 450-650℃ at 2-5℃/minutes and keeping for 4-6 hours, and obtaining the porous tubular carbon nitride catalyst (HNCN) after natural cooling. USE - The catalyst is useful in visible light catalytic degradation of antibiotic pollutants (claimed). ADVANTAGE - The method: has simple process, strong operability and easy realization of industrialized production; has porous tubular morphology which can improve the visible light utilization efficiency of the catalyst; improves the electron transport performance; increases the specific surface area of graphene-like carbon nitride (g-C3N4); and improves the visible light catalytic performance of the catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for porous tubular carbon nitride catalyst (HNCN) prepared by the above-mentioned preparation method.