Abstract
Brochantite (Cu4(OH)6SO4) multilayered nanoplates have been synthesized from acidic CuSO4 aqueous solution (pH = 3.7–4.5) in the presence of homemade mesoporous ZnO, marking an important distinction from the literature reports in which brochantite synthesis typically occurred in alkaline solution in the presence of hydroxides, for example, NaOH. The as-synthesized brochantite nanoplates further spontaneously organized into flowerlike hierarchical superstructures that exhibited high catalytic activity and good reusability for catalytic wet peroxide oxidation (CWPO) of the azo-dye Congo red (CR). The CR degradation efficiency reached 97% under near-neutral, ambient conditions (pH = 6.4, T = 20 °C, p = 1 atm), without elevating the temperature and/or tuning the optimal pH value as is usually done in CWPO reactions for improved degradation efficiency.
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