Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering and Technology (CIPET), B-25, CNI complex, Patia, Bhubaneswar, Odisha 751024, India..
Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering and Technology (CIPET), B-25, CNI complex, Patia, Bhubaneswar, Odisha 751024, India.
J Photochem Photobiol B. 2018 Jun;183:397-404. doi: 10.1016/j.jphotobiol.2018.05.001. Epub 2018 May 3.
In the current investigation, TiO and TiO-ZnO (core-shell) spherical nanoparticles were synthesized by simple combined hydrolysis and refluxing method. A TiO core nanomaterial on the shell material of ZnO was synthesized by utilizing variable ratios of ZnO. The structural characterization of TiO-ZnO core/shell nanoparticles were done by XRD analysis. The spherical structured morphology of the TiO-ZnO has been confirmed through field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) studies. The UV-visible spectra of TiO-ZnO nanostructures were also compared with the pristine TiO to investigate the shift of wavelength. The TiO-ZnO core/shell nanoparticles at the interface efficiently collect the photogenarated electrons from ZnO and also ZnO act a barrier for reduced charge recombination of electrolyte and dye-nanoparticles interface. This combination improved the light absorption which induced the charge transfer ability and dye loading capacity of core-shell nanoparticles. An enhancement in the short circuit current (J) from 1.67 mA/cm to 2.1 mA/cm has been observed for TiO-ZnObased photoanode (with platinum free counter electrode), promises an improvement in the energy conversion efficiency by 57% in comparison with that of the DSSCs based on the pristine TiO. Henceforth, TiO-ZnO photoelectrode in ZnO will effectively act as barrier at the interface of TiO-ZnO and TiO, ensuring the potential for DSSC application.
在当前的研究中，通过简单的组合水解和回流法合成了 TiO 和 TiO-ZnO（核壳）球形纳米粒子。通过利用 ZnO 的不同比例，在 ZnO 壳材料上合成了 TiO 核纳米材料。通过 XRD 分析对 TiO-ZnO 核/壳纳米粒子的结构特征进行了表征。通过场发射扫描电子显微镜（FE-SEM）和透射电子显微镜（TEM）研究证实了 TiO-ZnO 的球形结构形态。还将 TiO-ZnO 纳米结构的紫外-可见光谱与原始 TiO 进行了比较，以研究波长的偏移。TiO-ZnO 核/壳纳米粒子在界面处有效地从 ZnO 收集光生电子，并且 ZnO 也充当电解质和染料-纳米粒子界面还原电荷复合的阻挡层。这种组合提高了光吸收，从而诱导了核壳纳米粒子的电荷转移能力和染料负载能力。TiO-ZnO 基光阳极（无铂对电极）的短路电流（J）从 1.67 mA/cm 提高到 2.1 mA/cm，与基于原始 TiO 的 DSSC 相比，能量转换效率提高了 57%。因此，在 TiO-ZnO 和 TiO 的界面处，ZnO 中的 TiO-ZnO 光电极将有效地起到阻挡作用，确保 DSSC 应用的潜力。
