碳量子点在基于二氧化钛的光电极中的作用：上转换还是其他作用？
Role of carbon quantum dots in titania based photoelectrodes: Upconversion or others?
机构信息
School of Chemistry Engineering, Northeast Electric Power University, Jilin 132012, PR China.
School of Chemistry Engineering, Northeast Electric Power University, Jilin 132012, PR China; School of Chemistry, Beihang University, Beijing 100191, PR China.
出版信息
J Colloid Interface Sci. 2018 Nov 1;529:396-403. doi: 10.1016/j.jcis.2018.06.040. Epub 2018 Jun 19.
Carbon quantum dots (CQDs) were synthesized by a facile and green pyrolysis method. The as-prepared CQDs show wide light absorption, tunable downconversion photoluminescence (PL) properties and excellent "upconversion" luminescence properties. CQDs were used to design the TiO/CdS/C photoelectrodes for photoelectrochemical hydrogen evolution. The role of the CQDs was investigated based on the TiO/CdS/C photoelectrodes. The results reveal that CQDs can enhance light-harvesting efficiency and improve their charge separation and transfer properties when coupled with conventional QD-sensitized photoelectrodes. Nevertheless, the contribution of "upconversion" luminescence of CQDs to the enhanced photoelectrochemical performance is negligible.
碳量子点（CQDs）通过简便、绿色的热解法合成。所制备的 CQDs 具有宽的光吸收、可调的下转换光致发光（PL）性能和优异的“上转换”发光性能。CQDs 被用于设计 TiO/CdS/C 光电化学析氢电极。基于 TiO/CdS/C 光电化学析氢电极研究了 CQDs 的作用。结果表明，CQDs 可以与传统的量子点敏化光电化学析氢电极结合，提高光捕获效率，并改善其电荷分离和转移性能。然而，CQDs 的“上转换”发光对增强光电化学性能的贡献可以忽略不计。
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