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Heterogeneous activation of persulfate for the degradation of bisphenol A with Ni2SnO4–RGO.
- Source :
- New Journal of Chemistry; 4/28/2020, Vol. 44 Issue 16, p6355-6361, 7p
- Publication Year :
- 2020
-
Abstract
- Spherical Ni<subscript>2</subscript>SnO<subscript>4</subscript> nanoparticles were uniformly loaded on reduced graphene oxide (RGO) sheets via a hydrothermal process. The obtained nickel stannate–reduced graphene oxide (Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO) composite was used as a catalyst for activating persulfate (PS). The heterostructure composed of Ni<subscript>2</subscript>SnO<subscript>4</subscript> and RGO prevents both the agglomeration of Ni<subscript>2</subscript>SnO<subscript>4</subscript> nanoparticles and the restacking of RGO sheets. The synergy between the two components affords enhanced Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO catalytic activity. Using Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO to activate PS can degrade bisphenol A (BPA) at a faster rate with less PS, in comparison with the most recently reported catalysts. BPA solution (50 mL, 0.10 mM) can be 100% degraded by PS (0.02 g) within 30 min at pH 8 using Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO (0.02 g) as the catalyst. Moreover, the preparation of Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO is simple, inexpensive and environment-friendly. The radical scavenging study indicates that sulfate radicals () and hydroxyl radicals (˙OH) are involved in the oxidation, in which plays a leading role. In addition, Ni<subscript>2</subscript>SnO<subscript>4</subscript>–RGO retains high catalytic activity after four consecutive cycles, exhibiting greatly enhanced stability in comparison with Ni<subscript>2</subscript>SnO<subscript>4</subscript>. Besides, the effect of different inorganic anions on the degradation was also explored. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 44
- Issue :
- 16
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 142932050
- Full Text :
- https://doi.org/10.1039/c9nj05863j