A novel ternary hybrid flame retardant named P-g-C 3 N 4 @PGS-Ti was prepared through step-by-step method. First, titanium dioxide was loaded on PGS to make PGS-Ti (where PGS = palygorskite), and then, PGS-Ti was decorated by phosphordoped g-C 3 N 4 (abbreviated as P-g-C 3 N 4 ) to prepare a ternary flame retardant of P-g-