The titanium dioxide nanocatalyst (TiO₂:NC) was fabricated by chemical precipitation method and annealed at different temperatures. The texture parameters was estimated by Barrett–Joyner–Halenda (BJH) and Brunauer–Emmett–Teller (BET) utilizing nitrogen adsorption–desorption data. The crystal phase transition, enhanced crystallinity and increase in crystallite sizes with temperature were studied by using X-ray diffractograms (XRD). Coinciding with an increase in crystallite size supervising annealing temperatures, the surface area of the TiO₂:NC decreases. The average grain size as calculated from scanning electron microscopy (SEM) initially decreases with increasing annealing temperature (300 °C), whereas further increase in annealing temperature (600 °C), is accompanied by the increase in grain size. A red shift was observed in the diffuse reflectance spectra (DRS) caused by a decrease in band gap energy with rising annealing temperatures. The chemical composition was examined by using Fourier transform infrared (FTIR) and energy dispersive X-ray (EDX) spectroscopies. All the annealed TiO₂:NC samples were used as photocatalysts for the degradation of rhodamine 6G (R6G) under simulated solar light source. The TiO₂:NC annealed at 600 °C have a higher degradation rate constant than the other samples.

采用化学沉淀法制备了二氧化钛纳米催化剂（TiO ₂：NC），并在不同温度下进行了退火。纹理参数由Barrett-Joyner-Halenda（BJH）和Brunauer-Emmett-Teller（BET）利用氮吸附-解吸数据估算。使用X射线衍射图（XRD）研究了晶体的相变，增强的结晶度以及随温度增加的微晶尺寸。伴随着控制退火温度的微晶尺寸的增加，TiO ₂的表面积：NC减小。由扫描电子显微镜（SEM）计算出的平均晶粒尺寸最初随着退火温度（300℃）的升高而减小，而退火温度（600℃）的进一步升高则伴随着晶粒尺寸的增加。随着退火温度的升高，带隙能量的减少导致在漫反射光谱（DRS）中出现红移。通过使用傅立叶变换红外（FTIR）和能量色散X射线（EDX）光谱仪检查化学成分。将所有退火的TiO ₂：NC样品用作光催化剂，以在模拟太阳光源下降解罗丹明6G（R6G）。在600°C下退火的TiO ₂：NC具有比其他样品更高的降解速率常数。