期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 46, 期 2, 页码 1065-1076出版社
SPRINGER
DOI: 10.1007/s11164-018-3531-9
关键词
Mesoporous materials; TiO2; Composites; Photocatalysis; Organic pollutants
资金
- State Key Basic Research Program of the PRC [2016YFA0204000]
- NSF of China [21603036]
- Shanghai Rising-Star Program
Controllable synthesis of mesoporous photocatalysts is of great interest for the photocatalytic remediation of organic pollutants from wastewater by sunlight. In this work, we have developed a new photocatalyst with nitrogen-doped carbon (NC) and mesoporous TiO2 (mTiO(2)) interpenetrating hetero-structure by a sol-gel process combined with an in situ carbonization strategy. The synthesized nanospheres possess a uniform particle size (similar to 60 nm), high surface area (similar to 108 m(2)/g), and large pore diameter (similar to 2.1 nm). Most importantly, the nanospheres consist of ultrasmall TiO2 nanocrystals (similar to 8.2 nm), which are uniformly coated by a thin layer of N-doped carbon. Significantly, the resultant NC/mTiO(2) composite nanospheres exhibit a broad light absorption in the range of 200-2000 nm (entire wavelength). When serving as a photocatalyst for organic pollutants degradation, high performance was obtained. Accordingly, the resultant NC/mTiO(2) composite nanospheres performed in an excellent manner in the photodegradation of methyl orange, and the total removal efficiency was up to 97.7%, much better than that of commercial P25 (19.8%). Furthermore, the nanocomposite also effectively photodegraded other organic pollutants such as methylene blue (dyestuff) and phenol, respectively. Therefore, the resultant NC/mTiO(2) nanocomposites have potential applications in environmental cleanup.
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