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Fabrication of g-C3N4-reinforced CdS nanosphere-decorated TiO2 nanotablet composite material for photocatalytic hydrogen production and dye-sensitized solar cell application
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2022-11-26 , DOI: 10.1016/j.jallcom.2022.168209
Çağdaş Yavuz , Şule Erten Ela

Herein, a glib method to produce g-C3N4-reinforced CdS-modified anatase TiO2 is proposed. The CdS spheres broaden the visible region absorption spectrum of TiO2 and improve the charge-transfer mechanism by reinforcing it with g-C3N4. Thus, we aim to improve the photocatalytic efficiency using ternary photocatalyst. Powder X-ray diffraction, scanning electron microscopy images are accomplished to characterize the components of a ternary composite. Ternary semiconductors possess a better photocatalytic activity in hydrogen production (233 μmol g−12 h−1) than other synthesized semiconductors. DSSCs are fabricated using the prepared electrodes as photoanodes and investigated using current density–voltage, the EQE, and electrochemical impedance spectroscopy. The fabricated DSSC shows the highest overall conversion efficiency of 4.16%, open-circuit voltage of 0.75 V, and short-circuit current density of 10.17 mA/cm2. The heterojunction catalysts formed by semiconductors with matched bandgaps have enhanced photocatalytic ability and better solar cell performance.



中文翻译:

g-C3N4 增强 CdS 纳米球修饰 TiO2 纳米片复合材料的制备用于光催化制氢和染料敏化太阳能电池应用

在此,提出了一种制备gC 3 N 4增强的CdS修饰的锐钛矿TiO 2的glib方法。CdS 球拓宽了 TiO 2的可见区吸收光谱,并通过用 gC 3 N 4加强它来改善电荷转移机制。因此,我们的目标是使用三元光催化剂提高光催化效率。完成粉末 X 射线衍射、扫描电子显微镜图像以表征三元复合材料的成分。三元半导体在制氢方面具有更好的光催化活性(233 μmol g -1 2 h -1)比其他合成半导体。使用制备的电极作为光阳极制造 DSSC,并使用电流密度-电压、EQE 和电化学阻抗谱进行研究。制造的DSSC表现出最高的总转换效率4.16%,开路电压为0.75 V,短路电流密度为10.17 mA/cm 2。由具有匹配带隙的半导体形成的异质结催化剂具有增强的光催化能力和更好的太阳能电池性能。

更新日期:2022-12-01
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