Abstract

MoS₂-deposited TiO₂ hollow spheres were synthesized successfully under mild temperature and autogenous pressure. The hydrothermal technique was adopted for the synthesis of the TiO₂ hollow microsphere, followed by a photodeposition technique for the deposition of MoS₂. The physical and chemical nature of the samples was characterized using X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, photoluminescence spectroscopy, XPS and UV–vis spectroscopy. In an aqueous medium under the influence of light, the characterized samples were used in the production of hydrogen via photocatalysis. The increase in the formation of hydrogen content during photocatalysis confirms the successful generation and the benefits of the photogenerated carriers. With an increase in the MoS₂ content, there is an incredible change in the photocatalytic performance. The resultant is due to the free moment of the holes and electrons and lessening in charge recombination centres formed as a result of the nano-heterojunction linking between MoS₂ and TiO₂. A more significant photocatalytic production of hydrogen was achieved using 50 MST sample i.e. 106 μmol⁻¹ g⁻¹ beyond which it tends to decrease with an increase in MoS₂ content.

Graphic abstract

中文翻译：

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MoS 2沉积的TiO 2中空微球的制备及其在产氢中的光催化应用

摘要

在温和的温度和自生压力下成功合成了MoS ₂沉积的TiO ₂中空球。采用水热法合成TiO ₂中空微球，然后采用光沉积法沉积MoS ₂。使用X射线衍射，能量色散X射线光谱，扫描电子显微镜，光致发光光谱，XPS和UV-vis光谱对样品的物理和化学性质进行了表征。在光的作用下，在水性介质中，表征的样品用于通过光催化制氢。光催化过程中氢含量形成的增加证实了光生载流子的成功产生和益处。随着MoS ₂含量的增加，光催化性能发生了令人难以置信的变化。结果是由于空穴和电子的自由矩以及由于MoS ₂之间的纳米异质结连接而形成的电荷复合中心减少和TiO ₂。使用50 MST样品（即106μmol ^-1  g ^-1）实现了更显着的氢气光催化生产，超过此趋势，氢气随MoS ₂含量的增加而降低。

图形摘要