The synergetic effect of a structure-engineered mesoporous SiO2–ZnO composite for doxycycline adsorption
| Autor: | Danya Huang, Jingjing Zhang, Daowen Cheng, Chen Wu, Ying Zhang, Minggang Wang, Zhankui Zhao, Hong-Li Wang, Yue Chi |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Aqueous solution General Chemical Engineering Composite number Mechanism based 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Open framework 0104 chemical sciences Adsorption Chemical engineering Adsorption kinetics Doxycycline hydrochloride 0210 nano-technology Mesoporous material |
| Zdroj: | RSC Advances. 9:38772-38782 |
| ISSN: | 2046-2069 |
| Popis: | The design and synthesis of an efficient adsorbent for antibiotics-based pollutants is challenging due to the unique physicochemical properties of antibiotics. The development of a mesoporous SiO2–ZnO composite is a novel way to achieve excellent adsorption efficiency for doxycycline hydrochloride (DOX) in aqueous solutions due to the engineered highly open mesoporous structure and the ZnO-modified framework. Unlike the traditional method of obtaining mesoporous composites by post-synthesis techniques, the novel one-step method developed in this study is both effective and environment-friendly. The adsorption mechanism based on the novel synergetic effect between SiO2 and ZnO was demonstrated through several experiments. SiO2 led to the creation of a 3D open framework structure that provides sufficient space and rapid transport channels for adsorption, ensuring rapid adsorption kinetics. A higher number of active sites and enhanced affinity of the contaminants are provided by ZnO, ensuring high adsorption capacity. The mesoporous SiO2–ZnO could be easily regenerated without a significant decrease in its adsorption efficiency. These results indicate that the developed strategy afforded a simple approach for synthesizing the novel mesoporous composites, and that mesoporous SiO2–ZnO is a possible alternative adsorbent for the removal of DOX from wastewater. |
| Databáze: | OpenAIRE |
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