Surface-binding through polyfunction groups of Rhodamine B on composite surface and its high performance photodegradation
| Autor: | Yun Gu, Yiqun Wan, Zhaodi Xu, Lan Guo, Xiaofen Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Analytical chemistry General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Adsorption chemistry Rhodamine B Photocatalysis Molecule Absorption (chemistry) 0210 nano-technology Photodegradation Visible spectrum |
| Zdroj: | Applied Surface Science. 366:59-66 |
| ISSN: | 0169-4332 |
| Popis: | A kind of novel composite ZnS/In(OH) 3 /In 2 S 3 is synthesized using zinc oxide nanoplates as zinc raw material during hydrothermal process. Although the obtained samples are composited of ZnS and In(OH) 3 and In 2 S 3 phase, the samples possess different structure, morphology and optical absorption property depending on molar ratio of raw materials. Zeta potential analysis indicates different surface electrical property since various content and particle size of the phases. The equilibrium adsorption study confirms the composite ZnS/In(OH) 3 /In 2 S 3 with surface negative charge is good adsorbent for Rhodamine B (Rh B) dye. In addition, the degradation of Rh B over the samples with surface negative charge under visible light ( λ ≥ 420 nm) is more effective than the samples with surface positive charge. The samples before and after adsorbing Rh B molecule are examined by FTIR spectra and Zetasizer. It is found that the three function groups of Rh B molecule, especially carboxyl group anchors to surface of the sample through electrostatic adsorption, coordination and hydrogen-bond. It contributes to rapid transformation of photogenerated electron to conduction band of In(OH) 3 and suppresses the recombination of photogenerated carrier. The possible adsorption modes of Rh B are discussed on the basis of the experiment results. |
| Databáze: | OpenAIRE |
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