Table 1. Percent contents of C, O and Ti elements for various samples determined by XPS.

sample	Elemental content (at.%)
	C	O	Ti
TO-0	58.03	31.26	10.71
TO-2	55.60	32.48	11.92
TO-4	53.84	33.93	12.23
TO-6	51.03	36.15	12.82