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Rhodamine B dye is efficiently degraded by polypropylene-based cerium wet catalytic materials

机译：通过聚丙烯基铈湿催化材料有效地降解罗丹明B染料

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摘要

Polypropylene-based cerium wet catalytic materials (Ce/PPNW-g-PAA) were prepared through ultraviolet grafting and ion exchange technology. They were used as effective and reusable heterogeneous catalysts for rhodamine B (RhB) degradation. The physicochemical properties of Ce/PPNW-g-PAA were characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), specific surface area measurements (BET), and X-ray photoelectron spectroscopy (XPS). The catalytic capacity of the Ce/PPNW-g-PAA-H(2)O(2)system for the removal of RhB was tested in comparison with several other systems, which demonstrated that Ce/PPNW-g-PAA effectively promoted the oxidation and degradation of RhB by catalytic wet H(2)O(2)oxidation. The results of the RhB degradation showed that Ce/PPNW-g-PAA exhibited excellent degradation performance by achieving a high removal rate for RhB (97.5%) at an initial RhB concentration of 100 mg L-1, H(2)O(2)dosage of 5.0 mmol, Ce/PPNW-g-PAA dosage of 0.15 g L-1, and initial pH of 5.0 at 298 K. The degradation of RhB by Ce/PPNW-g-PAA conformed to the first-order kinetic reaction model. Consecutive experiments performed with the Ce/PPNW-g-PAA sample showed little activity decay, further confirming the high stability of the catalyst. In addition, the possible degradation mechanism of RhB was also investigated by XPS and electron paramagnetic resonance. The results suggested that Ce(3+)and hydroxyl radical played important roles during the RhB degradation process.
机译：通过紫外线接枝和离子交换技术制备聚丙烯基锡湿催化材料（CE / PPNW-G-PAA）。它们被用作罗丹明B（RHB）降解的有效和可重复使用的异质催化剂。 Ce / PPNW-G-PAA的物理化学性质的特征在于傅里叶变换红外（FT-IR）光谱，扫描电子显微镜（SEM），比表面积测量（BET）和X射线光电子谱（XPS）。与几种其他系统相比，测试了用于去除RHB的CE / PPNW-G-PAA-H（2）O（2）o（2）系统的催化力，这证明了CE / PPNW-G-PAA有效地促进了氧化通过催化湿H（2）O（2）氧化rHb的降解。 RHB降解的结果表明，CE / PPNW-G-PAA通过在初始RHB浓度为100mg L-1，H（2）O（2）的初始RHB浓度下进行rHB（97.5％）的高除去速率，表现出优异的降解性能。（2）O（2 ）剂量为5.0mmol，Ce / PPNW-G-Paa剂量为0.15g L-1，初始pH为5.0，Ce / PPNW-G-Paa的rHB的降解符合一阶动力学反应模型。用CE / PPNW-G-PAA样品进行的连续实验显示较少的活性衰减，进一步证实了催化剂的高稳定性。此外，还通过XPS和电子顺磁共振研究了RHB的可能降解机制。结果表明CE（3+）和羟基激活在RHB降解过程中起重要作用。

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  • 来源
    《RSC Advances》 |2020年第45期|共11页
  • 作者

    Zhou Sen; Kong Lin; Yan Chunjie; Zhou Yunfei; Qiu Xiumei; Liu Chen;

  • 作者单位

    China Univ Geosci Fac Mat Sci &

    Chem Engn Res Ctr Nanogeomat Minist Educ 388 Lumo Rd Wuhan 430074 Peoples R China;

    China Univ Geosci Fac Mat Sci &

    Chem Engn Res Ctr Nanogeomat Minist Educ 388 Lumo Rd Wuhan 430074 Peoples R China;

    China Univ Geosci Fac Mat Sci &

    Chem Engn Res Ctr Nanogeomat Minist Educ 388 Lumo Rd Wuhan 430074 Peoples R China;

    China Univ Geosci Fac Mat Sci &

    Chem Engn Res Ctr Nanogeomat Minist Educ 388 Lumo Rd Wuhan 430074 Peoples R China;

    Minist Land &

    Resources Hubei Geol Res Lab Key Lab Rare Mineral Explorat &

    Utilizat 9 Gutian Five Rd Wuhan 430034 Peoples R China;

    China Univ Geosci Fac Mat Sci &

    Chem Engn Res Ctr Nanogeomat Minist Educ 388 Lumo Rd Wuhan 430074 Peoples R China;

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