High-efficiency removal of rhodamine B dye in water using g-C 3 N 4 and TiO 2 co-hybridized 3D graphene aerogel composites
High-efficiency removal of rhodamine B dye in water using g-C 3 N 4 and TiO 2 co-hybridized 3D graphene aerogel composites
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DOI：
10.1016/j.seppur.2017.11.035
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发表时间：
2018-04
影响因子：
8.6
通讯作者：
Jing-Jie Zhang;Su Fang;Jin-Ya Mei;G. Zheng;Xiucheng Zheng;Xinxin Guan
中科院分区：
文献类型：
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作者：
Jing-Jie Zhang;Su Fang;Jin-Ya Mei;G. Zheng;Xiucheng Zheng;Xinxin Guan
采用水热法结合冷冻干燥法制备了石墨化氮化碳-二氧化钛-石墨烯气凝胶（g-C3 N4-TiO 2-GA）复合材料。在黑暗条件下，5.0 mg复合材料对罗丹明B（RhB，20.0 mg L-1，25 mL）的吸附率在1 h内高达96.5%，在可见光照射下可达98.4%。此外，所得到的复合材料也显示出令人满意的循环稳定性，即使在四个循环的去除后，去除效率仍可以达到75.6%。此外，提出了复合材料的光催化机理。结果表明，g-C3 N4-TiO 2-GA复合材料具有独特的三维多级孔结构，各组分之间存在协同效应，可有效地用于可见光照射下有机染料的去除。
The graphitic carbon nitride-titanium dioxide-graphene aerogel (g-C3N4-TiO2-GA) composites were facilely assembled by a hydrothermal approach combined with freeze drying. The adsorptivity for rhodamine B (RhB, 20.0 mg L−1, 25 mL) within 1 h over 5.0 mg of the composites was as high as 96.5% in dark and could be up to 98.4% under visible light irradiation. Furthermore, the resulting composites also displayed satisfactory cyclic stability and the removal efficiency could be 75.6% even after four cycles of removal. In addition, a photocatalytic mechanism was proposed for the composite. The result demonstrated that the g-C3N4-TiO2-GA composites could be effectively used for the elimination of organic dyes under visible light irradiation because of their unique 3D hierarchical porous structure and the synergistic effect among the components.