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June 5, 2026
‘In the Age of Technology, It Is Interesting to Look into the Past and Think about What We Can Take from It
Polina Tabakova decided to apply for a Philology degree at HSE in Nizhny Novgorod because she grew up in Mari El and did not want to move far away from the Russian forests. In an interview for the Young Scientists of HSE University project, she spoke about the genre of the campus novel, the existential drama of Kolobok, and a blackout version of Eugene Onegin.
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Facile and Green Approach to Synthesize Biomass-Derived Zero-/Two-Dimensional Carbon Dots/g-C3N4 Heterojunction for Efficient Photocatalytic and Photoelectrocatalytic Applications

ChemNanoMat. 2026. Vol. 12. No. 5. Article e202500733.
Das A., Saikia J., Maji N., Vasenko A.

Developing efficient photoactive materials from bio-derived resources is vital yet challenging for achieving effective water splitting performance. In this work, nano carbon dots (CDs) of zero-dimensional (0D) were synthesized from papaya peel through a simple and eco-friendly process and subsequently anchored onto the two-dimensional (2D) layered structure of graphitic carbon nitride (g-C3N4, GCN) at various composite ratios to obtain a 0D/2D nanohybrid. The optical and physicochemical properties of the resulting nanohybrids were comprehensively characterized using various analytical techniques. The catalysts were evaluated for both Rhodamine B (RhB) dye photodegradation and photoelectrochemical (PEC) water splitting applications. Among all the samples, GCN-CD-3 exhibited superior photocatalytic activity under visible-light irradiation due to its enhanced light absorption, efficient electron transfer, and effective separation of photogenerated charge carriers, achieving a rate constant of 0.0316 min−1, approximately 3.8 times higher than that of pristine GCN. Moreover, GCN-CD-3, as a photoelectrode for PEC water splitting, demonstrated an impressive photocurrent density of 3.62 mA/cm2 at a low onset potential of 0.63 V versus Ag/AgCl, surpassing the performance of other catalysts. These results demonstrate that the bio-derived nanohybrid functions as an efficient catalyst for sustainable water-splitting applications, without raising toxicity concerns.

Research target: Chemistry Materials Technologies
Language: English
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Keywords: PhotocatalysisHeterojunctionsCarbon Dots
Publication based on the results of:
Атомистическое моделирование динамики фотовозбуждённых состояний в новых материалах для солнечной энергетики (2024)
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