TiO₂/PVA nanocomposites film was assembled using a solution casting technique, whereas the synthesis of TiO₂ nanoparticles was achieved by the Sol-gel method. The control in TiO₂ phases nanoparticle from Anatase, mix, and Rutile was taken place only by controlling the time and temperature of the calcination process, which belief as a new technique for that purpose. TiO₂ nanoparticles with different phases employed as a filler and PVA as a host matrix. The established of TiO₂ with different phases were examined by X-ray diffraction (XRD). At the same time, the shape and the approximate crystal size carried out by Transmission electron microscope (TEM), the XRD reveals the existence of anatase, rutile and mixed TiO₂ phases with average crystal size (D) of 7 nm 78 nm and 42 nm for anatase, rutile, and mix phases, respectively. TEM of TiO₂ nanoparticles indicates the spherical shape of the rutile phase, and the tetragonal shape appears clearly in anatase, and the impact of the calcination process on crystal size was considerable. The grain size noted in the TEM image has a good agreement with the XRD results estimated by applying Scherrer's equation. The optical properties of TiO₂/PVA composite films have been examined. The red-shifted of the direct optical band gap is achieved from 3.25 to 2.63 eV for phase transformation from anatase to rutile. The refractive index (n) dispersion was analyzed by applied the Wemple– Didomenico single oscillator model, and the dispersion parameters (E_o and E_d) were determined. Besides the photo-stability investigation of TiO₂/PVA nanocomposite with the anatase phase of TiO₂, which considers the characteristic phase.

TiO ₂ / PVA纳米复合材料薄膜是采用溶液流延技术组装的，而TiO ₂纳米颗粒的合成是通过溶胶-凝胶法实现的。仅通过控制煅烧过程的时间和温度来控制来自锐钛矿，混合和金红石的TiO ₂相纳米颗粒，这被认为是用于该目的的新技术。具有不同相的TiO ₂纳米颗粒用作填充剂，PVA作为基质。TiO ₂的建立通过X射线衍射（XRD）检查不同相的相。同时，通过透射电子显微镜（TEM）进行的形状和近似晶体尺寸的X射线衍射揭示了锐钛矿，金红石和TiO ₂混合相的存在，平均晶体尺寸（D）为7 nm，78 nm和42分别用于锐钛矿，金红石和混合相的nm。TiO ₂纳米颗粒的TEM显示出金红石相的球形，并且锐钛矿中清楚地显示出四边形，并且煅烧过程对晶体尺寸的影响是巨大的。TEM图像中指出的晶粒尺寸与通过应用Scherrer方程估算的XRD结果有很好的一致性。TiO ₂的光学性质/ PVA复合膜已被检查。对于从锐钛矿到金红石的相变，直接光学带隙的红移从3.25 eV达到2.63 eV。通过应用Wemple– Didomenico单振荡器模型分析折射率（n）色散，并确定色散参数（E _o和E _d）。除了研究TiO ₂ / PVA纳米复合材料的光稳定性以外，还考虑了TiO ₂的锐钛矿相。