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- W3017225869 abstract "Abstract Graphene quantum dots (GQD) are promising visible‐light photocatalysts for organic dye degradation. Besides having improved visible‐light activity compared with commercial TiO 2 , GQD are versatile photocatalysts as their chemical composition and, consequently, optical properties can be tuned synthetically, with a direct impact on photoactivity. However, there is a lack of systematic comparative studies to benchmark GQD photocatalytic performance and relate it to their intrinsic properties. This is undertaken in this work for three types of GQD, which are prepared using well‐established synthetic methods representative of top‐down and bottom‐up approaches using different precursors. Resulting GQD are similar in size but differ in chemical composition, crystallinity, bandgap (ranging from 2.63 to 3.63 eV) and visible‐light absorptivity. Photoactivity measurements under comparable experimental conditions (visible‐light illumination) reveal enormous activity differences for rhodamine B (RhB) degradation, with up to tenfold higher degradation yields at the same time for certain GQD types. The enormous influence of intrinsic and tunable GQD factors, like visible‐light absorptivity and surface charge, on their photoactivity for the degradation of organic dyes is demonstrated, highlighting the importance of tailoring such parameters for enhanced photocatalytic performance. A plausible mechanism for GQD‐catalyzed photodegradation of RhB is also proposed." @default.
- W3017225869 created "2020-04-24" @default.
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- W3017225869 date "2020-04-17" @default.
- W3017225869 modified "2023-09-30" @default.
- W3017225869 title "On the Factors behind the Photocatalytic Activity of Graphene Quantum Dots for Organic Dye Degradation" @default.
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- W3017225869 doi "https://doi.org/10.1002/ppsc.202000061" @default.
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