Photocatalytic degradation of bisphenol A by TiO2@aspartic acid-beta-cyclodextrin@reduced graphene oxide
Photocatalytic degradation of bisphenol A by TiO2@aspartic acid-beta-cyclodextrin@reduced graphene oxide
复制标题
TiO2@天冬氨酸-β-环糊精@还原氧化石墨烯光催化降解双酚A
DOI：
10.1016/j.seppur.2020.117574
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发表时间：
2021
影响因子：
8.6
通讯作者：
Deng Nansheng
中科院分区：
文献类型：
--
作者：
Wang Guanghui;Dai Jialing;Luo Qiuyan;Deng Nansheng
本工作中，一种新型的二氧化钛@天冬氨酸-β-环糊精@还原氧化石墨烯采用光化学法成功制备了（TiO 2@ACD@RGO）复合光催化剂，并用扫描电镜（SEM）、透射电镜（TEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、拉曼光谱、比表面（BET）、X射线光电子能谱（XPS）和热重分析（TGA）。研究了双酚A（BPA）在紫外光（λ <365 nm）照射下的光催化降解行为，解释了TiO2@ACD@RGO光催化降解BPA的机理，并评价了TiO2@ACD@RGO复合材料的稳定性和重复使用性能。结果表明，TiO2@ACD@RGO对双酚A的光催化降解效果优于TiO2和TiO2@RGO。TiO2@ACD@RGO对BPA的反应常数为0.739 mg/L·min，分别是TiO2@RGO和TiO2的1.34倍和1.87倍。BPA降解的主要活性氧物种被确定为O2 −和h+。高的光催化活性归因于在TiO2@ACD@RGO界面的电子传递和传质的改善。此外，TiO2@ACD@RGO在5次循环后表现出优异的稳定性和可重复使用性。
In this work, a novel titanium dioxide@aspartic acid-β-cyclodextrin@reduced graphene oxide (TiO2@ACD@RGO) composite photocatalyst was successfully synthesized by photochemical method and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform- infrared spectroscopy (FT-IR), Raman spectroscopy, Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The photocatalytic degradation behavior of bisphenol A (BPA) was investigated under UV irradiation (λ < 365 nm), the mechanism of photocatalytic degradation of BPA on TiO2@ACD@RGO was explained, and the stability and reusability of TiO2@ACD@RGO composite was also evaluated. The photocatalytic investigations showed that the TiO2@ACD@RGO possessed high photocatalytic efficiency for the degradation of BPA, which was better than that of TiO2and TiO2@RGO. The reaction constant of TiO2@ACD@RGO for BPA was 0.739 mg/L·min, which was 1.34 times of TiO2@RGO and 1.87 times of TiO2, respectively. The predominant reactive oxygen species for BPA degradation was identified to be the O2−and h+. The high photocatalytic activity was attributed to the improvement of the electron transfer and mass transfer at the TiO2@ACD@RGO interface. Additionally, the TiO2@ACD@RGO presented excellent stability and reusability after five cycles.