Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 525, Issue -, Pages 298-303Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2016.12.003
Keywords
Gravity-driven; Catalytic membrane; Polydopamine; Nanofibrous membrane; Water treatment
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Funding
- Innovation and Technology Commission of the Hong Kong Government [ITS/079/14]
- Strategic Research Theme on Clean Energy at the University of Hong Kong
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An efficient gravity-driven catalytic membrane was developed in the current study. By taking advantage of its great surface area and high porosity, we prepared MnO2 nano-catalysts onto a polydopamine-coated nanofibrous substrate to achieve the combination of high catalyst loading (up to 9.7 wt%) and high water permeability (6155 +/- 448 L m(-2) h(-1) bar(-1)). In this approach, polydopamine was used as a green template for the spontaneous immobilization of MnO2 from a potassium permanganate solution, which resulted in uniformly-dispersed nano-catalysts without the need of strong reducing agent. Gravity-driven catalytic filtration results showed efficient removal (> 95%) of the model pollutant methyl blue. This gravity-driven catalytic filtration process may open new opportunities for contaminant removal with high efficiency and low energy consumption.
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