Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 17, Pages 5247-5255Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta10316a
Keywords
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Funding
- National Natural Science Foundation of China [2124079, 50873099, 20804045]
- Jilin Bureau of Science and Technology [20060319]
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A one-pot approach was demonstrated to effectively synthesize carbon microspheres through catalytic carbonization of commercial chlorinated poly(vinyl chloride) (CPVC) microspheres by Fe2O3 at 700 degrees C. Without Fe2O3, a sponge-like carbon lump was obtained. However, after adding Fe2O3 (even 0.5 g per 100 g CPVC) into CPVC, carbon microspheres with octahedral Fe3O4 microcrystals uniformly embedded on the surface (Fe/CMS) were synthesized. The influence of Fe2O3 on the carbonization of CPVC microspheres was investigated. It was found that Fe2O3 significantly accelerated the dehydrochlorination of CPVC into polyene before the melting of the CPVC microsphere surface. As a result, the microspheres of raw CPVC showed a shape-duplicate carbonization behaviour. The resultant Fe/CMS showed high photo-degradation efficiency of Congo red under UV irradiation via a heterogeneous photo-Fenton process with high recyclablity, reusability and long-term stability. This indicated that the resultant Fe/CMS has a potential application in wastewater treatment. Therefore, the initial catalytic substance could be effectively used as a catalyst twice in the carbonization of CPVC microspheres and in the subsequent application of Fe/CMS. More importantly, the strategy of catalytic carbonization offers a new potential way to largely convert charring polymers into functional carbon and carbon-based materials with various morphologies.
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