This study aimed to synthesise TiO₂ nanoparticles (NPs) in pure rutile structure at moderate temperature without calcination and use them as the catalyst for alachlor removal under UV-C radiation. The crystal structure, composition, and particle size of the synthesised TiO₂ NPs were analysed using an X-ray diffractometer (XRD) and a scanning electron microscope (SEM). The XRD spectra revealed the production of pure rutile TiO₂. The individual and interactive effects of initial alachlor concentration (15–75 mg/L), TiO₂ concentration (25–125 mg/L), pH (3–11), temperature (20–40 °C) and reaction time (15–75 min) on alachlor removal were investigated using the central composite design model based on the response surface methodology for experimental design, modelling and process optimization. The analysis of variance and multiple linear regression showed a good fit of the experimental data to the second-order polynomial model, with a coefficient of determination (R²) value of 0.8176 and a model F-value of 19.55975, implying that the model was significant. The results showed that decrease in pH and the initial alachlor concentration and increase in TiO₂ concentration resulted in an increase in alachlor removal rate. The maximum rate of alachlor removal (98.44%) at optimum conditions occurred at pH = 5, alachlor = 30 mg/L, TiO₂=100 mg, temperature = 35 °C and reaction time = 60 min.

这项研究旨在在不煅烧的情况下在中等温度下合成纯金红石结构的TiO ₂纳米颗粒（NPs），并将其用作在UV-C辐射下去除甲草胺的催化剂。使用X射线衍射仪（XRD）和扫描电子显微镜（SEM）分析了合成的TiO ₂ NP的晶体结构，组成和粒径。X射线衍射（XRD）光谱揭示了纯金红石型TiO _2的产生。初始甲草胺浓度（15–75 mg / L），TiO ₂的个体和相互作用效应使用基于响应面的中央复合设计模型研究了甲草胺去除的浓度（25–125 mg / L），pH（3–11），温度（20–40°C）和反应时间（15–75分钟）实验设计，建模和过程优化的方法论。方差分析和多元线性回归表明，实验数据非常适合二阶多项式模型，确定系数（R ²）值为0.8176，模型F值为19.55975，表明该模型是重大。结果表明，pH和初始甲草胺浓度降低，TiO ₂升高浓度增加了甲草胺去除率。在最佳条件下，在pH = 5，丙草胺= 30 mg / L，TiO ₂ = 100 mg，温度= 35°C和反应时间= 60分钟时，发生了最佳的除草剂最大去除率（98.44％）。