▎ 摘　　要

The carrier mobility of two-dimensional tetragonal carbon allotrope (T-CA) from porous graphene is investigated by first-principles calculations. T-CA can be constructed from divacancy and Stone-Thrower-Wales defects from graphene. T-CA is a direct semiconductor with a band gap of 0.4 eV at Gamma point. T-CA possesses a high carrier mobility of the order of 10(4) cm(2) V(-1)s(-1) . As our study demonstrates, T-CA has potential applications for next-generation electronic materials.