Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 420, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126622
Keywords
Ni catalysis; Hyperporous polymer foam; Super-paramagnetic property; 4-nitrophenol reduction; Excellent reusability
Categories
Funding
- National Natural Science Foundation of China [51673075, 21805127]
- Natural Science Foundation of Guangdong Province [2020A0505100051]
- Science AMP
- Technology Program of Guangzhou City [201803030003, 201704030085]
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A nickel-coated hyperporous polymer foam (Ni-HPF) was designed and fabricated with hierarchical multiscale porous structures and abundant catalytical interfaces, showing high conversion efficiency and rapid reaction rate for treating organic 4-nitrophenol pollutants. The magnetic catalyst also demonstrated excellent recoverability and reproducibility, indicating potential applications in water purification, chemical catalysis, and energy storage devices.
The facile and low-cost fabrication of free-standing magnetic catalysts with high catalytic efficiency, rapid reaction rate and excellent recoverability has been pursued for various catalysis applications, e.g., treating aqueous organic 4-nitrophenol pollutants. Here, we design and fabricate a free-standing nickel-coated hyperporous polymer foam (Ni-HPF) with adjustable shapes and sizes, hierarchical multiscale porous structures, abundant catalytical interfaces and excellent super-paramagnetic properties. Due to the synergistical effect of abundant binding sites and highly catalytic reduction, the as-prepared Ni-HPF has demonstrated high conversion efficiency (> 90% at extremely low concentration of 7.5 mu M) and rapid reaction rate (2.58 x 10(-3) s(-1)) for the reduction of organic 4-nitrophenol. Moreover, the magnetic catalyst also holds excellent recoverability (>80% conversion rate even after 1000 cycles) and good reproducibility (>80% conversion rate after 3 months of storage). As such, this work with novel material design and working principle could provide a wide range of potential applications in water purification, chemical catalysis and energy storage devices.
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