Layer-by-Layer Self-Assembled Metal-Ion- (Ag-, Co-, Ni-, and Pd-) Doped TiO_𝟐 Nanoparticles: Synthesis, Characterisation, and Visible Light Degradation of Rhodamine B

Table 1

Photocatalytic degradation efficiencies and apparent rate constants of the thin films.

Catalyst	No. of bi-layers	Apparent rate constant (min^−1)	Degradation after 6.5 h (%)
Degussa P25	10	0.0008	20
Ag-TiO2	1	0.0012	33
	3	0.0019	48
	5	0.0047	79
	10	0.0092	96
Co-TiO2	1	0.0012	33
	3	0.0022	51
	5	0.0043	76
	10	0.0102	97
Ni-TiO2	1	0.0013	35
	3	0.0025	56
	5	0.0029	62
	10	0.0059	85
Pd-TiO2	1	0.0013	35
	3	0.0022	51
	5	0.0029	61
	10	0.0083	94