Table 1.

Zeta potentials of the CTS/CSH, CTS/CSH/TiO₂, and various CTS/CSH/TiO₂/Gr composite films.

Samples	Ultrasonic Powers (W)	Zeta Potential (mV)
CTS/CSH	160	−27.33 ± 0.88 a
CTS/CSH/TiO2	160	−14.33 ± 0.45 c
9:1	160	−10.31 ± 0.13 de
8:2	160	−13.27 ± 0.69 cd
7:3	160	−15.27 ± 0.93 c
5:5	160	−16.26 ± 0.26 bc
6:4	0	−8.40 ± 0.22 e
6:4	80	−12.67 ± 2.52 cd
6:4	120	−15.20 ± 1.16 c
6:4	160	−19.76 ± 2.28 b
6:4	200	−19.73 ± 1.31 b

Different letters in the same column indicate significant differences (p < 0.05).