Morbiato Laura, Cardo Lucia, Sturabotti Elisa, Gobbo Pierangelo, Filippini Giacomo, Prato Maurizio
Department of Chemical and Pharmaceutical Sciences, INSTM UdR Trieste, University of Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy.
Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 194, Donostia-San Sebastián, 20014, Spain.
ACS Nano. 2025 Feb 4;19(4):4887-4900. doi: 10.1021/acsnano.4c16538. Epub 2025 Jan 22.
The chemical structure and photoredox properties of carbon dots () are not yet fully understood. However, it has been reported that, by carefully choosing the starting materials and tuning their synthesis conditions, it is possible to obtain with different chemical structures and therefore different photocatalytic performance. For this work, a family of different was synthesized in Milli-Q water a microwave-assisted protocol, using citric acid and urea as precursors. The syntheses were carried out at different times and temperatures to assess the impact of the synthetic parameters on the photocatalytic properties of the final materials. After extensive and accurate purification, the photocatalytic abilities of a selected subset of were tested by performing a photocatalyzed atom transfer radical addition reaction. Among the tested , the best performing ones were found to be those synthesized at the highest temperature, which were the most graphitic. A number of different characterization techniques were then used to evaluate the degree of graphitization of and to elucidate the origin of their different photocatalytic performance.
碳点（）的化学结构和光氧化还原性质尚未完全明确。然而，据报道，通过精心选择起始材料并调整其合成条件，有可能获得具有不同化学结构、进而具有不同光催化性能的碳点。在本研究中，采用柠檬酸和尿素作为前驱体，通过微波辅助法在超纯水中合成了一系列不同的碳点。在不同的时间和温度下进行合成，以评估合成参数对最终材料光催化性能的影响。经过广泛而精确的纯化后，通过进行光催化原子转移自由基加成反应，测试了部分选定碳点的光催化能力。在所测试的碳点中，发现性能最佳的是在最高温度下合成的那些，它们的石墨化程度最高。随后使用多种不同的表征技术来评估碳点的石墨化程度，并阐明其不同光催化性能的来源。
