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Green synthesized carbon quantum dots as TiO2 sensitizers for photocatalytic hydrogen evolution
Scopus
Toplam 129 atıf DOI
Carbon quantum dots (CQDs) have attracted growing interest due to their superior luminescent properties, which make them excellent photosensitizers for TiO2. This study presents the green-synthesis of CQDs from edible mushroom Agaricus bisporus through microwave irradiation. In the study as-synthesized CQDs were used as a sensitizer for TiO2 in photocatalytic hydrogen evolution in aqueous triethanolamine (sacrificial reagent) under visible-light irradiation. Photocatalytic hydrogen production activity of CQD-sensitized TiO2 was found to be 472 μmol g−1 h−1 (without loading any noble metal co-catalyst) and 1458 μmol g−1 h−1 (with loading Pt co-catalyst). The study revealed that the CQDs from mushroom A. bisporus can be used as an efficient sensitizer for TiO2 in photocatalytic hydrogen production.
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Green Carbon Dots (GCDs) for Photocatalytic Hydrogen Evolution and Antibacterial Applications
Scopus
Havuzumuzda 15 atıf almış
Microwave technique was used to synthesize Green Carbon Dots (GCDs) from Aloe vera leaves because of easy to apply, accessible, time-saving, cheap, safe and environmental-friendly way. The prepared GCDs/TiO2 composite was obtained via sensitization of TiO2 with the help of GCDs. The characterization of the GCDs/TiO2 was made optically, structurally and morphologically. The photocatalytic hydrogen activity of GCDs/TiO2 was investigated under visible light (λ>420 nm) irradiation in the aqueous solution using triethanolamine (TEOA) sacrificial electron donor. When Pt was used, GCDs/TiO2/Pt showed advanced hydrogen evolution production (1294 μmol g−1 h−1) approximately two-fold compared to GCDs/TiO2 (718 μmol g−1 h−1). In addition, NIR light-triggered antibacterial activity of GCDs on Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) were investigated by studying bacterial growth curve and abiotic GSH oxidation assay. GSH oxidation ability of GCDs was increased through NIR light irradiation. According to the bacterial growth curve test, E. coli was found to be more susceptible to our GCDs than S. aureus.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey