State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, Shandong, China.
State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, Shandong, China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 5):127206. doi: 10.1016/j.ijbiomac.2023.127206. Epub 2023 Oct 2.
In this study, carbon dots (CDs) and titanate nanofibers (TNs) were mixed with TEMPO-oxidized nanocellulose (TOCNC) to prepare fluorescent nanocellulose aerogels (FNAs) by a Schiff base reaction. The resulting FNA can detect the adsorption of Cr through the fluorescence quenching in CDs and promote the removal of Cr through the synergistic effect of CDs in photocatalysis. The optimized FNA has a maximum adsorption capacity of 543.38 mg/g, higher than most reported Cr adsorbents. This excellent performance is due to the porous structure of the aerogel, which gives it a high specific surface area of 20.53 m/g and provides abundant adsorption sites. Simultaneously, CDs can enhance the amino-induced Cr adsorption, improve the photocatalytic performance of TNs, and expose more adsorption sites through electrostatic adsorption of amino-induced reduction products (Cr). This study explores the preparation of visualized nanosorbents with enhanced photocatalytic removal of Cr and provides a new direction for nanoscale photocatalysts.
在这项研究中，碳点（CDs）和钛酸盐纳米纤维（TNs）与 TEMPO 氧化纳米纤维素（TOCNC）混合，通过席夫碱反应制备荧光纳米纤维素气凝胶（FNAs）。所得到的 FNA 可以通过 CDs 中的荧光猝灭来检测 Cr 的吸附，并通过 CDs 在光催化中的协同作用促进 Cr 的去除。优化后的 FNA 的最大吸附容量为 543.38mg/g，高于大多数报道的 Cr 吸附剂。这种优异的性能归因于气凝胶的多孔结构，使其具有 20.53m/g 的高比表面积，并提供了丰富的吸附位点。同时，CDs 可以增强氨基诱导的 Cr 吸附，提高 TNs 的光催化性能，并通过静电吸附氨基诱导的还原产物（Cr）暴露更多的吸附位点。本研究探索了制备可视化纳米吸附剂以增强 Cr 的光催化去除，并为纳米尺度光催化剂提供了新的方向。
