In this study, TiO2 nanocrystals were synthesized in the scaffold of cellulose nanocrystal (CNC) using in situ hydrolysis, where the morphology and size of TiO2 was controlled by CNC's functional groups and surface charge. The resulting TiO2/CNC nanocomposites showed a superior photocatalytic activity for Cr(VI) reduction under visible light (λ > 420 nm) due to the combined effects of small TiO2 size and ligand-to-metal charge transfer (LMCT) complex between CNC and TiO2. It was found that the charge-enriched CNC not only acted as a template to direct the crystal growth of TiO2, but also played essential roles on light harvesting and charge transfer thereby promoting the photoreduction of Cr(VI). The demonstrated system represents a unique pathway to develop a lower cost and efficient purification material for remediation of Cr(VI).

中文翻译：

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增强Cr（VI）光还原作用的TiO2 / CNC纳米复合材料的简便合成：纤维素纳米晶体的协同作用。

在这项研究中，使用原位水解在纤维素纳米晶体（CNC）的支架中合成了TiO2纳米晶体，其中TiO2的形态和大小受CNC官能团和表面电荷的控制。所得的TiO2 / CNC纳米复合材料在可见光（λ> 420 nm）下对Cr（VI）还原显示出优异的光催化活性，这归因于TiO2的尺寸小以及CNC与CN之间的配体-金属电荷转移（LMCT）络合物的综合作用。二氧化钛 发现富电荷的CNC不仅充当指导TiO2晶体生长的模板，而且在光收集和电荷转移中起着重要作用，从而促进了Cr（VI）的光还原。演示过的系统代表了开发低成本，高效率的净化材料来修复Cr（VI）的独特途径。