Abstract Various molar ratio CdS nanoparticles (NPs) were successfully decorated on the surfaces of anatase-TiO2(B) nanobelts (NBs) synthesized by hydrothermal method. When the molar ratio of CdS to anatase-TiO2(B) is 10:100 (TC-10), CdS NPs with smaller size were uniformly decorated on the anatase-TiO2(B) NBs. The XRD results indicated that the products were composed of anatase, TiO2(B) and hexagonal CdS. Photoluminescence emission, UV–Vis absorption spectra, photocurrent spectra and electrochemical impedance spectra of the as-prepared samples demonstrated that the CdS NPs contributed to the enhancement of properties of composites. And the TC-10 exhibited the best photoelectrochemical properties. The rhodamine B (RhB) photocatalytic degradation experiments under 300 W Xenon lamp irradiation showed that CdS favors the improvement of degradation ratios. The TC-10 has the highest degradation ratio of RhB (91.9%, 30min), which should be attributed to the formation of homojunction, heterojunction and the uniform distribution of CdS nanoparticles with small sizes.

中文翻译：

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用 CdS 纳米粒子装饰的锐钛矿-TiO2(B) 纳米带增强的光电化学和光催化性能

摘要 在水热法合成的锐钛矿-TiO2(B)纳米带(NBs)的表面成功地修饰了各种摩尔比的CdS纳米颗粒(NPs)。当 CdS 与锐钛矿-TiO2(B) 的摩尔比为 10:100 (TC-10) 时，较小尺寸的 CdS NPs 均匀地装饰在锐钛矿-TiO2(B) NBs 上。XRD结果表明产物由锐钛矿、TiO2(B)和六方CdS组成。所制备样品的光致发光发射、UV-Vis 吸收光谱、光电流光谱和电化学阻抗光谱表明，CdS NPs 有助于提高复合材料的性能。并且TC-10表现出最好的光电化学性能。300 W 氙灯照射下的罗丹明 B (RhB) 光催化降解实验表明，CdS 有利于提高降解率。TC-10 对 RhB 的降解率最高（91.9%，30min），这应该归因于同质结、异质结的形成以及小尺寸 CdS 纳米颗粒的均匀分布。