Department of Polymer Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, 11155-4563, Tehran, Iran.
International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Chemosphere. 2021 Dec;284:131320. doi: 10.1016/j.chemosphere.2021.131320. Epub 2021 Jun 27.
In this study, Cellulose/Zinc Oxide-x (CA/ZnO-x) hybrid aerogel with various concentrations of Zn ion is synthesized through the hydrothermal method and used for organic pollutant removal. The CA/ZnO-x hybrid aerogel was characterized by XRD, UV-Visible, DRS, FTIR, FESEM, EDS, BET, LC-MS-MS analyses. In the present study, CA/ZnO-x hybrid aerogel as photocatalyst was used to investigate the influence of the photocatalytic degradation of methyl orange (MO) from an aqueous solution under UV irradiation. The morphology of CA/ZnO-x hybrid aerogels exhibited that the ZnO rice grain-like shape were successfully synthesized on the cellulose aerogel matrix. Also, the influence of various factors such as photocatalyst dosage, pH, initial concentration of MO, and irradiation intensity was investigated on the photocatalytic degradation rate of MO. The results revealed that the highest degradation efficiency and mineralization rate of MO were about 99.02% and 51.68%, respectively, after 90 min under UV irradiation using CA/ZnO-0.4 photocatalyst when pH = 3, C = 10 ppm, photocatalyst dose = 9 g L under the 300 W UV light irradiation. Furthermore, the synthesized photocatalyst exhibited a considerable firmness and easily separated from an aqueous solution for reuse.
在这项研究中，通过水热法合成了具有不同浓度锌离子的纤维素/氧化锌-x（CA/ZnO-x）杂化气凝胶，并将其用于去除有机污染物。通过 XRD、UV-Visible、DRS、FTIR、FESEM、EDS、BET 和 LC-MS-MS 分析对 CA/ZnO-x 杂化气凝胶进行了表征。在本研究中，CA/ZnO-x 杂化气凝胶作为光催化剂用于研究在紫外光照射下从水溶液中光催化降解甲基橙（MO）的影响。CA/ZnO-x 杂化气凝胶的形态表明，成功地在纤维素气凝胶基质上合成了 ZnO 稻粒状形状。此外，还研究了各种因素，如光催化剂用量、pH 值、MO 的初始浓度和辐照强度对 MO 光催化降解率的影响。结果表明，在 pH=3、C=10 ppm、光催化剂剂量=9 g/L、300 W 紫外光照射下，使用 CA/ZnO-0.4 光催化剂 90 min 后，MO 的最高降解效率和矿化率分别约为 99.02%和 51.68%。此外，所合成的光催化剂具有相当的坚固性，并且易于从水溶液中分离出来以重复使用。
