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FLAME SPRAY PYROLYSIS OF PURE AND DOPED TiO2 NANOPARTICLES FOR WASTE WATER TREATMENT
| Content Provider | Semantic Scholar |
|---|---|
| Author | Assibey, Michael |
| Copyright Year | 2016 |
| Abstract | Pesticide run-offs and minewaters usually contain toxic compounds that must be removed to avoid contamination of aquatic environments by their effluents. The use of nanomaterials in water treatment indicate several advantages over other methods (e.g. large surface area, enhanced reactivity) in the treatment process. The synthesis of the photocatalyst and structural optimization are key research areas when dealing with water treatment. TiO2 is considered to be ideal in terms of cost effectiveness, stability and doping to enhance absorption of visible light. The aims of this study were to synthesize pure and doped (Ag and N) titania using Flame Spray Pyrolysis (FSP), characterize the nanoparticles using microscopy and apply them to U.V treatment of water containing organic compounds. X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Transmission Electron Microscopy (TEM) were used in characterizing the nanoparticles. XRD patterns indicate that the anatase phase is dominant among all the samples. FTIR and TEM analysis confirmed the presence of pure TiO2 and Ag-doped. However, the presence of N-doped TiO2 was not obtained. The water treatment studies were carried out using U.V. at 253 nm. The reference organic compounds used in the studies were sodium oxalate and sodium formate. The removal efficiency of the organic compounds was determined by measuring the total organic carbon (TOC) in the aqueous solutions of the above mentioned organic compounds. A slightly higher removal rate of TOC was observed for sodium oxalate than for sodium formate upon application of the pure TiO2 and when irradiation time was increased. However, the degradation of the oxalates obtained with the U.V treatment was considerably smaller than presented in previous studies. In addition, the flow rate did not affect the removal of the TOC content in both organic compounds. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://epublications.uef.fi/pub/urn_nbn_fi_uef-20160787/urn_nbn_fi_uef-20160787.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
