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Scaling Up the Process of Titanium Dioxide Nanotube Synthesis and Its Effect on Photoelectrochemical Properties.

ABSTRACT: In this work, for the first time, the influence of scaling up the process of titanium dioxide nanotube (TiO₂NT) synthesis on the photoelectrochemical properties of TiO₂ nanotubes is presented. Titanium dioxide nanotubes were obtained on substrates of various sizes: 2 × 2, 4 × 4, 5 × 5, 6 × 6, and 8 × 8 cm². The electrode material was characterized using scanning electron microscopy as well as Raman and UV-vis spectroscopy in order to investigate their morphology, crystallinity, and absorbance ability, respectively. The obtained electrodes were used as photoanodes for the photoelectrochemical water splitting. The surface analysis was performed, and photocurrent values were determined depending on their place on the sample. Interestingly, the values of the obtained photocurrent densities in the center of each sample were similar and were about 80 µA·cm². The results of our work show evidence of a significant contribution to wider applications of materials based on TiO₂ nanotubes not only in photoelectrochemistry but also in medicine, supercapacitors, and sensors.

SUBMITTER: Szkoda M

PROVIDER: S-EPMC8510213 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:Interventions: This study is a cross-over design, including only healthy volunteers. A cross-over design was chosen because it is the most appropriate design for this study: it will reduce the individual differences by allowing every subject to be his own control. This study will be done in 4 weeks and include 2 periods. The volunteers will be randomized in two groups: one group will start with the intervention period and the other one will start with the control period. After, these 2 weeks of intervention or control periods, the volunteers will start the control period and intervention period respectively for another 2 weeks. The time of exposure is 2 weeks. Indeed, it takes 5 to 7 days for the turnover of the epithelial cells in the gut. This will ensure the exposure of all the cells of the luminal surface of the colon. The control period, is meant to reduce to a minimum the ingestion of E171 in order to have all the volunteers to start the same level of E171. During this period the volunteers will receive a list of products to avoid like cookies, chewing gum, certain toothpaste that are known to contain a significant amount of E171. The intervention period, is meant to control the amount of E171 that the volunteers will ingest. A concentration, 0.82 mg/kg bw/day, corresponding to a normal daily consumption will be given to the volunteers. The quantity will be adjusted to the body weight and dispersed in yoghurt that will be eaten at breakfast, lunch and dinner. In order to verify the compliance of the subjects, once in every period the subjects will prepare a package that include exactly what they ate and drank all day. This food package will be mixed and tested for TiO2 content. Primary outcome(s): The primary outcome parameters are differences in transcriptomic markers after consumption of food additive E171. These outcomes in humans will shed light on the relevance of markers identified in preclinical studies, and how the animal data on the risk of facilitation of tumour growth can be extrapolated to humans Study Design: Randomized controlled trial, Single blinded (masking used), N/A , unknown, Crossover

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Scaling Up the Process of Titanium Dioxide Nanotube Synthesis and Its Effect on Photoelectrochemical Properties.

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