Synthesis and Characterization of B/NaF and Silicon Phthalocyanine-Modified TiO2 and an Evaluation of Their Photocatalytic Removal of Carbamazepine
| Autor: | Emin Bacaksiz, Debora Fabbri, Vassilis N. Stathopoulos, Ismail Degirmencioglu, IIknur Altin, Giuliana Magnacca, Chukwuka Bethel Anucha, Paola Calza |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Titania Mineralization Materials science Absorption spectroscopy Filtration and Separation 02 engineering and technology 010402 general chemistry 01 natural sciences Analytical Chemistry lcsh:Chemistry chemistry.chemical_compound X-ray photoelectron spectroscopy Photocatalysis Fourier transform infrared spectroscopy Photocatalytic degradation Axial methoxy-substituted silicon phthalocyanine technology industry and agriculture Phthalocyanine Substrate (chemistry) Boron/sodium fluoride Carbamazepine Contaminant of emerging concern 021001 nanoscience & nanotechnology lcsh:QC1-999 0104 chemical sciences 3. Good health body regions lcsh:QD1-999 chemistry Titanium dioxide Crystallite 0210 nano-technology lcsh:Physics Nuclear chemistry |
| Zdroj: | Separations, Vol 7, Iss 71, p 71 (2020) Separations Volume 7 Issue 4 |
| ISSN: | 2297-8739 |
| Popis: | This study investigated the synthesis of two different types of photocatalysts, namely, boron/sodium fluoride co-doped titanium dioxide (B/NaF-TiO2), and its analogue, a dye-sensitized form of silicon-based axial methoxy substituted phthalocyanine (B/NaF-TiO2SiPc). Structural and morphological characterizations were performed via X-ray diffraction (XRD) Fourier transform infra-red (FTIR) N2 adsorption&ndash desorption at 77 K by Brunauer&ndash Emmett&ndash Teller (BET) and Barrett, Joyner, and Halenda (BJH) methods transmission electron microscopy (TEM) X-ray photoelectron spectroscopy (XPS) and UV&ndash visible absorption spectroscopy. The estimated crystallite size of pure TiO2 and pure B/NaF-TiO2 was 24 nm, and that of B/NaF-TiO2SiPc was 29 nm, whereas particle sizes determined by TEM were 25, 28, and 31 nm for pure TiO2, B/NaF-TiO2 and B/NaF-TiO2SiPc respectively. No significant differences between B/NaF-TiO2 and B/NaF-TiO2SiPc were observed for surface area by (BET) analysis (13 m2/g) or total pore volume by the BJH application model (0.05 cm3/g). Energy band gap values obtained for B/NaF-TiO2 and B/NaF-TiO2SiPc were 3.10 and 2.90 eV respectively, lower than pure TiO2 (3.17 eV). The photocatalytic activity of the synthesized materials was tested using carbamazepine (CBZ) as the model substrate. Carbamazepine removal after 4 h of irradiation was almost 100% for B/NaF-TiO2 and 70% for B/NaF-TiO2SiPc however, the substrate mineralization proceeded slower, suggesting the presence of organic intermediates after the complete disappearance of the pollutant. |
| Databáze: | OpenAIRE |
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