The photocatalytic applications of TiO was limited by its rapid photogenerated charge recombination and low responsiveness to visible light. To address these challenges, we introduced a novel low-dimensional heterojunction, CdS quantum dots/TiO nanocone arrays on Ti mesh substrate (referred to as CTNC), facilitating efficient separation of photogenerated carriers under visible light. Effective type Ⅱ electron migration from TiO to CdS was established, enhancing charge separation, as confirmed by in situ irradiated Kelvin probe force microscopy (KPFM) and ultraviolet photoelectron spectroscopy (UPS). The comprehensive analysis of the photoelectric properties of conical TiO further confirmed the efficient separation of electron-hole pairs. Leveraging these advantages, the CTNC catalyst significantly degraded 83% of TC (20 mg/L) within 120 min (rate constant k = 0.029 min), outperforming CTNR (CdS quantum dots/TiO nanorod arrays on Ti substrate) by 2.6 times, and surpassing related low-dimension heterostructures of CdS/TiO in previously reported. Remarkably, CTNC exhibited exceptional TC degradation performance and stability on both fronts. The present study provides profound insights into enhancing the photocatalytic performance of TiO through morphology manipulation and the formation of heterojunctions responsive to visible light.

中文翻译：

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0D/1D Ⅱ型CdS/TiO2纳米锥阵列/Ti杂化材料用于可见光驱动的四环素快速光催化降解：界面电子传输机制的深入研究

TiO 的光催化应用因其快速光生电荷复合和对可见光的低响应性而受到限制。为了应对这些挑战，我们在钛网基底上引入了一种新型低维异质结，即CdS量子点/TiO纳米锥阵列（简称CTNC），有助于可见光下光生载流子的有效分离。原位辐照开尔文探针力显微镜 (KPFM) 和紫外光电子能谱 (UPS) 证实，建立了从 TiO 到 CdS 的有效 Ⅱ 型电子迁移，增强了电荷分离。对圆锥形TiO2光电特性的综合分析进一步证实了电子-空穴对的有效分离。利用这些优势，CTNC催化剂在120分钟内（速率常数k = 0.029分钟）显着降解了83%的TC（20 mg/L），性能是CTNR（钛基底上的CdS量子点/TiO纳米棒阵列）的2.6倍，并且超越了之前报道的相关低维异质结构 CdS/TiO。值得注意的是，CTNC 在两个方面都表现出了卓越的 TC 降解性能和稳定性。本研究为通过形态调控和形成响应可见光的异质结来增强 TiO2 的光催化性能提供了深刻的见解。