Preparation, characterization, and application of TiO2/Carbon composite: Adsorption, desorption and photocatalysis of Gd-DOTA
| Autor: | Martín M. Dávila-Jiménez, Jürgen Mattusch, Mario A. Guerrero-Morales, María P. Elizalde-González |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Aqueous solution Materials science General Chemical Engineering Composite number chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Desorption Photocatalysis Environmental Chemistry 0210 nano-technology Safety Risk Reliability and Quality Photodegradation Bifunctional Carbon 0105 earth and related environmental sciences |
| Zdroj: | Process Safety and Environmental Protection. 120:195-205 |
| ISSN: | 0957-5820 |
| Popis: | The preparation methodology of a photocatalytic acting composite consisting of TiO2/Carbon carrying 24.5% of TiO2 is described. The environmental friendly TiO2/Carbon bifunctional material combining immobilized photocatalytic properties with a macroparticular carbonaceous ad-/desorbent was prepared in one-step procedure at low temperature from guava seeds and Ti(IV) oxysulfate as carbon and photocatalyst precursors, respectively. With artificial solar radiation, the composite can act as a photocatalyst for the degradation of the emerging pollutant, gadolinium-based contrast agent Gd-DOTA in aqueous solution with a degradation yield of 95%. For its reuse, the composite can be separated from the solution without centrifugation. The TiO2/Carbon composite is also able to adsorb and desorb the non-complexed gadolinium (Gd3+) ion once the cyclic Gd-DOTA is destroyed. The resulting photodegradation /-transformation as well adsorption and desorption phenomena were studied by analyzing the occurring Gd-species using ion exchange chromatography coupled to element and molecule selective mass spectrometers on-line (IEC-ICP-MS/ESI-QToF-MS). |
| Databáze: | OpenAIRE |
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