The sample A was tested as a catalyst for

The sample A3 was tested as a catalyst for heterogeneous Fenton bleaching of Orange II (OII) dye in aqueous solution. For this purpose, a 25 mg L−1 solution of OII was prepared and the AC 55541 was adjusted to 3 with 0.1 M solution of H2SO4. The as-prepared material (40 mg) was added to 250 mL Erlenmeyer flask containing 200 mL of the above OII solution.