Design and Synthesis of Metal Complexes of (2E)-2-[(2E)-3-Phenylprop-2-en-1-ylidene]hydrazinecarbothioamide and Their Photocatalytic Degradation of Methylene Blue

Table 3

Decolorization of dyes using Cu(II), Ni(II), and Co(II) complexes.

Dye/metal complex (5 mg)	% of removal at pH’s without UV			% of removal at pH’s with UV
	3.0	8.2	12.0	3.0	8.2	12.0
Methylene blue	No change	13.82	24.0	5.69	29.93	47.73
Co(L)2Cl2	14.78	14.78	44.66	9.24	9.24	83.07
Ni(L)2	7.9	29.93	35.72	38.8	22.18	80.44
Cu(L)2Cl2·2H2O	33.92	8.83	33.44	43.33	3.3	88.80