Synthesis and characterization of bismuth oxychloride (BiOCl) has received much attention due to its excellent photocatalytic properties, and low toxicity that allow its potential application for environmental decontamination processes. In this work, experimental conditions (temperature and reaction time) were established to synthesize BiOCl microspheres by a solvothermal method with high photocatalytic efficiency on the degradation of 3,4,5-trihydroxybenzoic acid (gallic acid). BiOCl materials were synthesized according to a design of experiment (DoE) where temperature and reaction time were selected as varying parameters. Obtained BiOCl materials with the highest and lowest degradation toward gallic acid, were characterized using several techniques. Results showed that the applied temperature is the most important parameter during solvothermal synthesis, which influences not only morphology and structure of BiOCl, but also its thermal stability and optical properties. Response surface methodology (RSM) analysis indicated that the highest photocatalytic efficiency of synthesized BiOCl material, is obtained when the temperature and reaction time are fixed at 155 °C and 18 h, respectively. Finally, a reaction mechanism of photocatalytic oxidation of gallic acid was proposed based on an experimental tests by adding different radical’ scavengers.

氯氧化铋（BiOCl）的合成和表征因其出色的光催化性能和低毒性而备受关注，这使其有可能应用于环境净化过程。在这项工作中，建立了实验条件（温度和反应时间）以通过溶剂热法以高光催化效率合成BiOCl微球，降解了3,4,5-三羟基苯甲酸（没食子酸）。根据实验设计（DoE）合成BiOCl材料，其中选择温度和反应时间作为变化参数。使用几种技术对获得的对没食子酸具有最高和最低降解的BiOCl材料进行了表征。结果表明，施加温度是溶剂热合成过程中最重要的参数，不仅影响BiOCl的形貌和结构，而且影响其热稳定性和光学性能。响应表面方法（RSM）分析表明，将温度和反应时间分别固定在155°C和18 h时，合成的BiOCl材料具有最高的光催化效率。最后，通过添加不同的自由基清除剂，通过实验测试，提出了没食子酸的光催化氧化反应机理。当温度和反应时间分别固定在155°C和18 h时获得 最后，通过添加不同自由基清除剂的实验研究，提出了没食子酸的光催化氧化反应机理。当温度和反应时间分别固定在155°C和18 h时获得 最后，通过添加不同自由基清除剂的实验研究，提出了没食子酸的光催化氧化反应机理。