Mengjie Zhou, Shuo Xu, Wenjie Zhang, Ge Shi, Yanjie He, Xiaoguang Qiao* and Xinchang Pang*,
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引用次数: 0
Abstract
To provide some insights into the relationship between carbon dots’ optical properties and their photocatalytic ability, a series of silicon-doped carbon dots (SiCDs) featuring varying photoluminescence quantum yields (PLQYs) from 11.2 to 75.6% were synthesized, characterized, and employed in polymerization processes. The as-prepared samples exhibited varied structural and optical attributes and resulted in different reaction rates when utilized as cocatalysts for copper-catalyzed photoinduced atom transfer radical polymerization (photoATRP). Comparing the measured density of states, it was found that band gap reduction enhanced the photocatalytic capability of SiCDs. Besides, a negative correlation between the PLQY and polymerization rate was observed, while the latter saw a positive relationship with the nonradiative recombination rate. Both the doping effect and size effect account for the varied efficiency of photoreducing CuII to CuI complexes by SiCDs, thus resulting in variation in the reaction rate. The selected optimal SiCD was further investigated through kinetic study, on–off, and chain extension experiments to prove its feasibility on the aqueous photoATRP system. Remarkably, the SiCD-photocatalyzed approach exhibited an oxygen-tolerant feature and rapid reaction rate, allowing for 3D fabrication of complex structures with high precision and resolution.
期刊介绍:
ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels.
The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.