Preparation and Characterization of Ag–TiO2 Modified Polyethersulfone (PES) Membranes for Potential Applications in Water Treatment

Kotlhao, Kate; Pakade, Vusumzi Emmanuel; Mtunzi, Fanyana M.; Moutloali, Richard M.; Klink, Michael J.

doi:10.1007/978-3-030-20283-5_20

Cited by 1 publication

(2 citation statements)

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“…1b, it shows the TiO2 nanoparticles with size range from 5 to 10 nm distributed over the graphene sheet. The inset image shows the selected area electron diffraction (SAED) pattern confirming the presence of anatase TiO2 crystal structure with planes (101), ( 004), ( 200 stretching modes [66,67]. The peak at around 1475 cm -1 is for the carboxyl group [63,64].…”

Section: Characterization Of (G-tio2 and G-tio2-ag)mentioning

confidence: 90%

“…It shows transmission bands at the range from 450 to 900 cm -1 and the band showed at 1616 cm -1 , is assigned to Ti-O-Ti and Ti-O-C stretching vibration modes[53,[62][63][64][65]. The bands in the range from 3200 to 3400 cm -1 are assigned to the stretching of the hydroxyl group of the adsorbed water on the surface of the materials[64][65][66]. The band appeared at 441 cm -1 and at ~ 475 cm -1 were considered as a characteristic peaks for Ag and Ag-O a .…”

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confidence: 99%

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Electrochemical Sensing of Dissolved Oxygen at Ternary Graphene Composite Modified Glassy Carbon Electrode

et al. 2021

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Novel sensor for dissolved oxygen (DO) centered on ternary composite of graphene/titanium dioxide/silver nanoparticle (G-TiO2-Ag) enhanced glassy carbon electrodes can be investigated. This modified composite was created using a hydrothermal process and then placed on the surface of the glassy carbon (GC) electrode as an active material. The electrochemical behavior of the GC/G-TiO2 modified electrode in 0.1 M PBS displayed two steps four electrons (4e`) mechanism for DO reduction, while, the electrochemical behavior of GC/G-TiO2-Ag displayed only one obvious peak which strongly indicates a fast and efficient one step (4e`) mechanism for DO reduction. A higher reduction current is obtained for DO on GC/G-TiO2-Ag compared with that on GC/G-TiO2 reflects a synergistic effect between Ag and TiO2. The amperometric measurement showed two linear regions, the first one is from 1 to 30.29 µM with sensitivity of 1.363 µAcm -2 µM -1 and detection limit of 0.011 µM (signal/noise = 3/1) and a correlation coefficient of 0.996. The second linear region shows an increase in response, with low rate than the first region, for DO concentration up to 100 µM (correlation coefficient 0.990) with sensitivity of 0.725 µAcm -2 µM -1 and detection limit of 0.214 µM.

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Section: Characterization Of (G-tio2 and G-tio2-ag)mentioning

confidence: 90%