Novel Carbon Quantum Dots/Silver Blended Polysulfone Membrane with Improved Properties and Enhanced Performance in Tartrazine Dye Removal
| Autor: | Lan Ching Sim, Ebrahim Mahmoudi, Woon Chan Chong, Yean Ling Pang, Chai Hoon Koo, Abdul Wahab Mohammad, Jin Yee Gan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ultrafiltration chemistry.chemical_element Filtration and Separation 02 engineering and technology 010402 general chemistry lcsh:Chemical technology 01 natural sciences Silver nanoparticle Article law.invention chemistry.chemical_compound law Chemical Engineering (miscellaneous) lcsh:TP1-1185 Surface charge Polysulfone lcsh:Chemical engineering Filtration Fouling Process Chemistry and Technology lcsh:TP155-156 021001 nanoscience & nanotechnology carbon quantum dots 0104 chemical sciences Membrane chemistry Chemical engineering ultrafiltration hydrophilicity rejection 0210 nano-technology Carbon anti-fouling |
| Zdroj: | Membranes, Vol 10, Iss 175, p 175 (2020) Membranes Volume 10 Issue 8 |
| ISSN: | 2077-0375 |
| Popis: | This study produced a novel polysulfone (PSF) membrane for dye removal using lemon-derived carbon quantum dots-grafted silver nanoparticles (Ag/CQDs) as membrane nanofiller. The preparation of CQDs was completed by undergoing hydrothermal treatment to carbonize the pulp-free lemon juice into CQD solution. The CQD solution was then coupled with Ag nanoparticles to form Ag/CQDs nanohybrid. The synthesized powders were characterized in terms of morphologies, functional groups and surface charges. A set of membranes was fabricated with different loadings of Ag/CQDs powder using the nonsolvent-induced phase separation (NIPS) method. The modified membranes were studied in terms of morphology, elemental composition, hydrophilicity and pore size. In addition, pure water flux, rejection test and fouling analysis of the membranes were evaluated using tartrazine dye. From the results, 0.5 wt % of Ag/CQD was identified as the optimum loading to be incorporated with the pristine PSF membrane. The modified membrane exhibited an excellent pure water permeability and dye rejection with improvements of 169% and 92%, respectively. In addition, the composite membrane also experienced lower flux decline, higher reversible fouling and lower irreversible fouling. This study has proven that the addition of CQD additives into membrane greatly improves the polymeric membrane&rsquo s properties and filtration performance. |
| Databáze: | OpenAIRE |
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