Graphene Oxide-Doped MgO Nanostructures for Highly Efficient Dye Degradation and Bactericidal Action
| Autor: | Muhammad Ikram, Anwar Ul-Hamid, Alvina Rafiq Butt, S. Hayat, K. Ul-Ain, Junaid Haider, Ali Haider, Aamer Saeed, Walid Nabgan, A. Shahbaz, T. Inayat |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Band gap Analytical chemistry Oxide Nanochemistry MgO 02 engineering and technology Antimicrobial activity 010402 general chemistry 01 natural sciences law.invention symbols.namesake chemistry.chemical_compound law lcsh:TA401-492 General Materials Science Graphene oxide Dopant Nano Express Graphene Doping 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Dye degradation chemistry symbols Nanorod Nanorods lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Raman spectroscopy |
| Zdroj: | Nanoscale Research Letters, Vol 16, Iss 1, Pp 1-11 (2021) Nanoscale Research Letters |
| Popis: | Various concentrations (0.01, 0.03 and 0.05 wt ratios) of graphene oxide (GO) nanosheets were doped into magnesium oxide (MgO) nanostructures using chemical precipitation technique. The objective was to study the effect of GO dopant concentrations on the catalytic and antibacterial behavior of fixed amount of MgO. XRD technique revealed cubic phase of MgO, while its crystalline nature was confirmed through SAED profiles. Functional groups presence and Mg-O (443 cm−1) in fingerprint region was evident with FTIR spectroscopy. Optical properties were recorded via UV–visible spectroscopy with redshift pointing to a decrease in band gap energy from 5.0 to 4.8 eV upon doping. Electron–hole recombination behavior was examined through photoluminescence (PL) spectroscopy. Raman spectra exhibited D band (1338 cm−1) and G band (1598 cm−1) evident to GO doping. Formation of nanostructure with cubic and hexagon morphology was confirmed with TEM, whereas interlayer average d-spacing of 0.23 nm was assessed using HR-TEM. Dopants existence and evaluation of elemental constitution Mg, O were corroborated using EDS technique. Catalytic activity against methyl blue ciprofloxacin (MBCF) was significantly reduced (45%) for higher GO dopant concentration (0.05), whereas bactericidal activity of MgO against E. coli was improved significantly (4.85 mm inhibition zone) upon doping with higher concentration (0.05) of GO, owing to the formation of nanorods. |
| Databáze: | OpenAIRE |
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