Growth of TiO₂ quantum dot thin films on ITO glass substrate by hydrothermal method at 180 C with variations of titanium precursor concentration (0.3, 0.5, 0.7, and 1 ml) is reported. UV–vis absorption spectrum shows a strong absorbance peak in the UV region. The bandgap of samples ranged from 3.2 to 3.6 eV. FESEM analysis shows a layered sieve-like porous morphological structure. The particle size is less than 10 nm. The FTIR analysis reveals the presence of isolated adsorbed Ti–OH and –OH groups which take part in photocatalysis reactions to oxidize dye molecules. The superoxides and hydroxyl radicals were yielded by the protonation process. The oxygen vacancies, confirmed from XPS analysis, play an important role in the formation of impurity level states below the conduction band with the accumulation of a large number of electrons. These electrons further take part in the hydrogen production process. This investigation demonstrates that thin film with 0.5 ml precursor volume shows enhanced MB dye degradation activity under UV light. The PL emission is quenched in the UV region for a sample having 0.5 ml precursor volume, enhancing the probability of charge carrier separation. Thus significant results in photocatalytic MB dye degradation activity are obtained.

TiO _{2 的}生长量子点薄膜在 ITO 玻璃基板上通过水热法在 180 C 下与钛前体浓度（0.3、0.5、0.7 和 1 ml）的变化进行了报道。紫外-可见吸收光谱在紫外区显示出强吸收峰。样品的带隙范围为 3.2 到 3.6 eV。FESEM 分析显示层状筛状多孔形态结构。粒径小于10nm。FTIR 分析揭示了分离的吸附 Ti-OH 和 -OH 基团的存在，这些基团参与了光催化反应以氧化染料分子。超氧化物和羟基自由基是通过质子化过程产生的。通过 XPS 分析证实，氧空位在导带以下杂质能级的形成中起着重要作用，并且大量电子积累。这些电子进一步参与制氢过程。该研究表明，0.5 ml 前体体积的薄膜在紫外光下显示出增强的 MB 染料降解活性。对于具有 0.5 ml 前体体积的样品，PL 发射在 UV 区域被淬灭，从而提高了电荷载流子分离的可能性。因此获得了光催化MB染料降解活性的显着结果。