Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 37, Pages 19898-19903Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm34138g
Keywords
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Funding
- National Basic Research Program of China [2009CB930400, 2011CB933700]
- National Natural Science Foundation of China [NSFC 50725207, NSFC 21121063]
- Chinese Academy of Sciences
- CSIRO [GJHZ1224]
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A fast, low-cost and scalable method was developed to prepare basic aluminum carbonate (Al(OH)CO3) porous nanospheres via a microwave-assisted solvothermal process in 5 min. All chemicals used were low-cost and environmentally benign. These Al(OH)CO3 nanospheres had an extremely large surface area (484 m(2) g(-1)),abundant carbonate groups, and showed superb adsorption properties with maximum capacities of 170 mg g(-1) and 60 mg g(-1) for As(V) and Cr(VI) at pH 7, respectively. These values were obviously higher than that of many other nanomaterials. In addition, for practical applications, 5 mg Al(OH)CO3 nanospheres could purify 6 kg As(V) contaminated water, reducing the As(V) concentration from 100 ppb to less than 10 ppb. A new adsorption mechanism involving ion exchange between carbonate groups and As(V) or Cr(VI) species was proposed and confirmed.
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