Design and Synthesis of Reusable Nanoparticles for Reversible Chemisorption of Hexavalent Chromium Anions from Aqueous Media and Catalysis

Figure 23

Reuse of Fe₃O₄@SiO₂@LEuH@PW₁₀ catalyst for the conversion of phenol to bromophenol blue. The experimental conditions included 10 ml of 1.0 mM phenol red + 10 ml of 10.0 mM NH₄Br + 0.5 g of catalyst + 2.5 mM H₂O₂, in a round-bottomed flask. Time = 10 minutes, T = 298 K, and  atm.