File Name : fig. s1 colors.tif

Caption : fig. s1 different colors of as-prepared (a) g-c3n4, (b) cr/g-c3n4-300, (c) cr/g-c3n4-
350, (d) cr/g-c3n4-400, (e) cr/g-c3n4-500, and (f) cr-300.

File Name : fig. s2 eds.tif

Caption : fig. s2 eds spectrum of cr/g-c3n4-300 catalyst.

File Name : fig. s3 sem.tif

Caption : fig. s3 fesem images of (a) cr/g-c3n4-350, (b) cr/g-c3n4-400, (c) cr/g-c3n4-500,
and (d) cr-300 samples.

File Name : fig. s4 survey.tif

Caption : fig. s4 wide-range xps spectrum of cr/g-c3n4-300 composite.

File Name : fig. s5 amount.tif

Caption : fig. s5 catalytic performance of cr/ g-c3n4-300 catalyst under different (a) amount of
catalyst and (b) volume ratio of h2o2 to benzene. reaction conditions: 3.36 mmol of
benzene, 2 ml of acetonitrile, t = 65 ℃, t = 7 h, (a) 1.2 ml of 30 wt% h2o2, and (b)
40 mg of catalyst.