Advanced oxidation processes such as photocatalysis have assumed enormous importance in the scientific field as viable sustainable alternatives to be applied to the elimination of persistent organic pollutants present in water reservoirs for human consumption. Persistent organic compounds like pesticides that belong to the chlorophenol family are a global public health priority since they are associated with serious diseases like cancer and can even cause death at low concentrations of prolonged exposure. This work proposes the use of activated Ni/Al layered double hydroxides as photocatalysts for the degradation of 2,4-dichlorophenol. The study variables associated with the properties of the catalysts were the Ni/Al metal ratio as well as the synthesis conditions. To determine the structural properties of catalytic precursors and catalysts, the techniques of XRD, FTIR, UV-DR, DGTA, TPD, SEM-EDS and TEM were used. The photodegradation tests were carried out in a Bach type reactor with a high energy uv lamp. The results of the photocatalytic degradation of 2,4-dichlorophenol in aqueous solution showed good photocatalytic activity with a degradation efficiency of up to 94% attributed to the presence of Ni in the crystalline and amorphous structures of NiO–NiAl₂O₄ oxides by means of a combined oxidation-reduction mechanism due to the effect of holes and superoxide and hydroxyl radicals not associated with the memory effect of reconstruction of layered double hydroxides.

先进的氧化过程（例如光催化）在科学领域中具有极为重要的意义，因为它们是可行的可持续替代品，可用于消除水库中存在的供人类消费的持久性有机污染物。持久性有机化合物（例如属于氯酚家族的农药）在全球范围内是公共卫生的重中之重，因为它们与严重的疾病（如癌症）相关，甚至在低浓度的长期暴露下也可能导致死亡。这项工作提出使用活化的Ni / Al层状双氢氧化物作为光催化剂降解2,4-二氯苯酚。与催化剂性能相关的研究变量是Ni / Al金属比以及合成条件。为了确定催化前体和催化剂的结构性质，使用了XRD，FTIR，UV-DR，DGTA，TPD，SEM-EDS和TEM等技术。在具有高能紫外灯的巴赫型反应器中进行光降解测试。2,4-二氯苯酚在水溶液中的光催化降解结果显示出良好的光催化活性，归因于NiO–NiAl的晶体和非晶结构中存在Ni，降解效率高达94％。由于空穴和超氧化物和羟基自由基的作用与层状双氢氧化物的重建记忆效应无关，因此通过组合的氧化还原机理利用₂ O ₄氧化物。