▎ 摘　　要

NOVELTY - The sensing electrode has boron/nitrogen co-doped hollow porous carbon sphere which is composed of carbonized boron/nitrogen co-doped solid carbon spheres wrapped in silicon dioxide and acid-etched into a hollow porous structure with pores. The average particle diameter is 174nm, and the average pore diameter is 6nm. The boron/nitrogen co-doped hollow porous carbon sphere is composed of carbonized boron/nitrogen co-doped solid carbon spheres wrapped in silicon dioxide and acid-etched into a hollow porous structure with pores. The average particle diameter is 174nm, and the average pore diameter is 6nm. USE - Hollow porous carbon ball/graphene electrochemical sensing electrode used in electrochemical sensor for detecting xanthine and guanine. ADVANTAGE - The electrochemical sensor constructed by the working electrode can simultaneously or separately detect xanthine and guanine, and exhibits excellent detection performance. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical view of verification test of an electrochemical sensor performance, when the 50 M guanine pre-existing, boron/nitrogen co-doped hollow porous carbon ball/graphene detecting xanthine differential pulse voltammetry in the concentration range of 10 ~ 60 M. (Drawing includes non-English language text).