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| Preparation of B-N co-doped TiO2 floating photocatalyst for degradation of diesel oil |
| WANG Xin, WANG Xue-jiang, WANG Wei, ZHANG Jing, ZHAO Jian-fu |
| State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China |
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Abstract Floating boron-nitrogen codoped TiO2 grafted on expanded perlite (B-N-TiO2/EP) photocatalysts were prepared by a facile sol-gel method. The catalysts were characterized by XRD, BET, SEM, UV-vis-DRS and XPS. Furthermore, photodegradation of diesel oil was investigated to evaluate photocatalytic activities of B-N-TiO2/EP. The TiO2 layer whose patterns were identified as anatase were clearly observed on the surface of EP. The immobilization of TiO2 could greatly improve the BET surface area of EP. Compared with that of N-TiO2/EP and TiO2/EP, the absorption band edge of B-N-TiO2/EP exhibits an evident red-shift and the absorption intensity of visible region increases obviously. This result is in accord with their photodegradation efficiency of diesel oil. The 9h photodegradation rate of diesel oil for B-N-TiO2/EP was nearly 50%. The GC-MS results showed all the diesel oil components (C9~C23) could be degraded and short-chain organic molecules ( < C11) were more easily photodegraded.
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Received: 11 December 2015
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