Effect of Cu-based metal organic framework (Cu-MOF) loaded with TiO2 on the photocatalytic degradation of rhodamine B dy
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RESEARCH ARTICLE
Effect of Cu-based metal organic framework (Cu-MOF) loaded with TiO2 on the photocatalytic degradation of rhodamine B dye Xiaoxiao Xue 1,2 & Yujing Weng 1,2 & Shicheng Yang 1,2 & Shihang Meng 1,2 & Zhengting Zhang 1,2 & Guiyun Yi 1,2 & Yulong Zhang 1,2 Received: 9 October 2020 / Accepted: 23 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Using copper nitrate trihydrate as the copper source, TiO2@Cu-MOF nanocomposites were prepared by a one-step crystallization method, and the effect of the amount of TiO2 loaded on the adsorption of rhodamine B was studied. X-ray diffraction (XRD), scanning electron microscope (SEM), energy spectrometer (EDS), N2 adsorption-desorption (BET), and infrared spectroscopy (FTIR) were used to characterize the microstructure and surface properties of composite materials. The results show that the composite material not only has a good degradability for rhodamine B, the decolorization rate reaches 98.03% after 120 min, but it also maintains a good cycle performance. Fitting the first-order kinetic equation to the reaction process, under the optimal conditions, R2 = 0.98, indicating that the reaction process conforms to the first-order kinetic equation. Therefore, the catalyst has good catalytic degradation and cycle performance. Keywords TiO2@Cu-MOF . Rhodamine B . Decolorization rate . Cycle performance
Introduction Environmental pollution is becoming more and more prominent with increase in the activities of industries. Textile, cosmetic, paper, leather, and food processing industries produce a lot of wastewater that is polluted with significantly high amount of synthetic dyes. Most of these synthetic dyes are chemically and thermally stable, non-biodegradable, and quite toxic. Among the common wastewater pollution, dye wastewater pollution is toxic, deep in color, and very difficult to degrade (Ruan et al. 2010). The methods to solve the Responsible editor: Sami Rtimi * Xiaoxiao Xue [email protected] * Yujing Weng [email protected] * Yulong Zhang [email protected] 1
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, People’s Republic of China
2
Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo 454003, Henan, People’s Republic of China
traditional wastewater such as chemical method, physical method, and biodegradation method are not effective. These are the reasons why the removal of organic dyes from wastewater remains an environment challenge that attracts attention of the research community (Li et al. 2016). Titanium dioxide (TiO2), as a kind of conventional photocatalytic nanomaterial with strong oxidation resistance, high stability, and non-toxicity, is considered to be the most promising photocatalyst, and is expected to be widely used in organic wastewater treatment (Jiang et al. 2014; Yu et al. 2019; Kiwi and Rtimi 2018). However, there are some disadvantages in the photocatalytic degradation of pure TiO2, such as low photocatalytic
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