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Fullerene-Cored Star-Shaped Polyporphyrin-Incorporated TiO2 as Photocatalysts for the Enhanced Degradation of Rhodamine B
Journal of Environmental Chemical Engineering ( IF 7.4 ) Pub Date : 2021-07-30 , DOI: 10.1016/j.jece.2021.106142
Zhen-Yi Wu 1 , Yu-Jin Xu 1 , Li-Jing Huang 1 , Qian-Xin Zhang 1 , Ding-Liang Tang 1
Affiliation  

Highly photoactive fullerene-cored star-shaped polyporphyrin incorporated TiO2, ZnCPP-Fullerol@TiO2, was prepared from the immobilization of fullerene-cored star-shaped polyporphyrin nanospheres, produced by the esterification of carboxyl porphyrin with fullerols, on the surface of TiO2 via the excess hydroxyl groups of fullerols, and used for rhodamine B degradation under light irradiation. The synthesized catalyst was fully characterized by various techniques, including ultraviolet-visible spectroscopy, fluorescence spectroscopy, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and thermogravimetric analysis etc. The results demonstrated that the insertion of fullerols in ZnCPP-Fullerol@TiO2 produced an enhancement in photocurrent efficiency and the photocatalytic degradation of rhodamine B. The degradation rate of rhodamine B was 94.7% after treatment with light irradiation for 150 min, and the reaction rate constant was k = 0.0193 s-1 for ZnCPP-Fullerol@TiO2. This constant was much higher than that of ZnCPP@TiO2(0.00723 s-1) due to the improvement in the separation of electron-hole pairs and the availability of good sites for adsorption and catalysis. Moreover ZnCPP-Fullerol@TiO2 exhibits excellent reusability, and a reasonable mechanism for the enhanced reactivity was proposed.



中文翻译:

富勒烯芯星形聚卟啉掺入二氧化钛作为光催化剂用于增强降解罗丹明 B

高光活性富勒烯核星形聚卟啉掺入TiO 2,ZnCPP-Fullerol@TiO 2,是通过将羧基卟啉与富勒醇酯化产生的富勒烯核星形聚卟啉纳米球固定在TiO 表面上制备的2通过富勒醇的过量羟基,用于在光照射下降解罗丹明 B。通过紫外-可见光谱、荧光光谱、X射线光电子能谱(XPS)、循环伏安法和热重分析等多种技术对合成的催化剂进行了充分表征。结果表明富勒醇在ZnCPP-Fullerol@TiO 2中的插入产生光电流效率的提高和罗丹明B的光催化降解。光照射150 分钟后罗丹明B的降解率为94.7% ,ZnCPP-Fullerol@TiO的反应速率常数为k = 0.0193 s -1 2 . 由于电子-空穴对分离的改进以及吸附和催化良好位点的可用性,该常数远高于ZnCPP@TiO 2 (0.00723 s -1 )。此外,ZnCPP-Fullerol@TiO 2表现出优异的重复使用性,并提出了提高反应性的合理机制。

更新日期:2021-08-01
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