Nitrogen-doped carbon enhanced mesoporous TiO2 in photocatalytic remediation of organic pollutants
Nitrogen-doped carbon enhanced mesoporous TiO2 in photocatalytic remediation of organic pollutants
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氮掺杂碳增强介孔TiO2光催化修复有机污染物
DOI：
10.1007/s11164-018-3531-9
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发表时间：
2018-07
影响因子：
3.3
通讯作者：
Wei Li
中科院分区：
文献类型：
--
作者：
Dian Li;Yupu Liu;Hong Liu;Zhihua Li;Li Lu;Jun Liang;Zhonghui Huang;Wei Li
介孔光催化剂的可控合成是利用太阳光降解废水中有机污染物的一个重要研究方向。在这项工作中，我们开发了一种新的光催化剂与氮掺杂碳（NC）和介孔TiO 2（mTiO 2）互穿异质结构的溶胶-凝胶过程结合原位碳化策略。合成的纳米球具有均匀的粒径（~ 60 nm）、高的表面积（~ 108 m2/g）和大的孔径（~ 2.1 nm）。最重要的是，纳米球由超小的TiO 2纳米晶体（~ 8.2 nm）组成，均匀地涂覆有一层N掺杂的碳。值得注意的是，所得NC/mTiO 2复合纳米球在200-2000 nm（整个波长）范围内表现出宽的光吸收。当用作光催化剂降解有机污染物时，获得了高性能。结果表明，NC/mTiO 2复合纳米球对橙子的光催化降解效果最好，总去除率高达97.7%，远优于商品P25的19.8%。此外，该纳米复合材料也有效地光降解其他有机污染物，如亚甲基蓝（染料）和苯酚，分别。因此，NC/mTiO 2纳米复合材料在环境净化方面具有潜在的应用价值。
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 (mTiO2) interpenetrating hetero-structure by a sol–gel process combined with an in situ carbonization strategy. The synthesized nanospheres possess a uniform particle size (~ 60 nm), high surface area (~ 108 m2/g), and large pore diameter (~ 2.1 nm). Most importantly, the nanospheres consist of ultrasmall TiO2 nanocrystals (~ 8.2 nm), which are uniformly coated by a thin layer of N-doped carbon. Significantly, the resultant NC/mTiO2 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/mTiO2 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/mTiO2 nanocomposites have potential applications in environmental cleanup.
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影响因子：
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通讯作者：
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影响因子：
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