Efficiency of various catalysts in degradation of methylene blue^a.

Entry	Catalyst	Degradation (%)
1	H2O2	12.5
2	[p-Ethynyl]4PMn	9.5
3	[p-Ethynyl]4PMn + H2O2	15.5
4	PP-EPMn	38.2
5	PP-EPMn + H2O2	99.6
6	PX-EPMn + H2O2	99.5

^aMethylene blue, 50 mL (10 mg L⁻¹); catalyst, 4 mg; H₂O₂, 1 mL; T = 25 °C; pH = 7; time = 3 h.