Journal of Chemistry / 2020 / Article / Fig 21

Research Article

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

Figure 21

Effect of (a) amount of catalyst (Fe3O4@SiO2@LEuH@PW10) and (b) amount of H2O2 used in bromination of phenol red to bromophenol blue. Reaction conditions are as follows 10 ml of 1.0 mM phenol red in water + 10 ml of 10.0 mM NH4Br in water + 2.5 mM H2O2 in reaction a + 0.5 g of catalyst in reaction b, in a round-bottomed flask. Time = 10 minutes, T = 298 K, and  atm.
(a)
(b)

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