Abstract

Titanium oxide (TiO₂) is one of the most scrutinized material because of its in-built fundamental properties and has been developed as an outstanding photo-catalytic material intended for many different industrial applications. In order to further explore the properties of TiO₂, we prepared Copper-loaded TiO₂ (Cu-TiO₂) nanoparticles (NPs) for inhibiting the growth of bacterial cells and also to serve as a chemical sensor. The physico-chemical characteristics of the synthesized Cu-TiO₂ NPs were characterized by many different techniques for the crystallinity, bonding and functionality, morphology, elemental composition, and absorption characteristics. From the results, we confirm for the formation of anatase phase of TiO₂ having a tetragonal crystal system, while the morphology studies indicated that the Cu dope TiO₂ has spherical morphology. The elemental analysis confirmed for the inclusion of Cu into TiO₂ crystal lattice and the absorption spectroscopic analysis helped for the bandgap calculation and visible light absorption property of Cu-TiO₂ NPs. The metal nanoclusters of Cu are observed to be deposited on different phases and sites of TiO₂ resulting in the inter-band transitions. Further, the sensitivity of Cu-TiO₂ as a chemical sensor is determined by fabricating the electrode at the FTO glass substrate where the ethanol sensitivity was found to be little increased/enhanced with Cu loading. Finally, the antibacterial activity of Cu-TiO₂ NPs was confirmed by its activity against various bacterial cultures and are found to be efficient.

摘要

氧化钛（TiO ₂）由于其固有的基本性能而成为最受关注的材料之一，并且已被开发为一种出色的光催化材料，可用于许多不同的工业应用。为了进一步探索TiO ₂的性质，我们制备了载铜的TiO ₂（Cu-TiO ₂）纳米粒子（NPs），用于抑制细菌细胞的生长并用作化学传感器。合成Cu-TiO ₂的理化特性NPs的结晶度，键合和功能，形态，元素组成和吸收特性通过许多不同的技术来表征。从结果，我们确认了具有四方晶系的TiO ₂的锐钛矿相的形成，而形态学研究表明Cu掺杂的TiO ₂具有球形形态。元素分析证实了将Cu包含在TiO ₂晶格中，吸收光谱分析有助于Cu-TiO ₂ NPs的带隙计算和可见光吸收性能。观察到Cu的金属纳米团簇沉积在TiO _2的不同相和部位上导致带间过渡。此外，通过在FTO玻璃基板上制造电极来确定作为化学传感器的Cu-TiO ₂的灵敏度，在该FTO玻璃基板上发现乙醇灵敏度几乎不会随着Cu负载的增加/增强而增加。最后，Cu-TiO ₂ NPs的抗细菌活性已被其对各种细菌培养物的活性所证实，并被证明是有效的。