One of the main drawbacks of heterogeneous photocatalysis is the high consumption of electrical energy generated by conventional lamps. This study proposes a methodology to find the best distribution of light emitting diodes (LEDs), i.e., the least amount of elements, and the optimum distance between them in order to substitute conventional lamps in photocatalytic processes, and a performance analysis in terms of energetic efficiency, using for this the Electric energy per order (E_EO) Figure-of-merit and the cost results for the degradation of the textile reactive dye Orange PX-2R by means of UV/TiO₂ process, using conventional lamps and different geometrical patterns of LED arrays. The obtained experimental results show that it is possible to replace sources of high-energy consumption by UV-LED arrays adapted to the specific needs for a given photocatalytic reactor obtaining suitable oxidation results, and the rate of decolorization obtained is similar to the results obtained with conventional lamps; however the UV-LEDs require 70% less electrical energy (178 vs 628 kW h/m³/order) than UV-lamps. Consequently, the use of UV-LEDs enables to degrade 3.5 times more dye with the current energy consumption of UV lamps. Finally, the proper choice for an array can generate additional energy savings.

异质光催化的主要缺点之一是传统灯产生的电能的高消耗。这项研究提出了一种方法，以找到最佳分布的发光二极管（LED），即最少的元素，以及它们之间的最佳距离，以便在光催化过程中替代传统的灯，并就能量进行性能分析。效率，为此使用了每订单电能（E _EO）的品质因数，以及通过UV / TiO ₂降解纺织品活性染料Orange PX-2R的成本结果使用常规灯和LED阵列的不同几何图案进行处理。获得的实验结果表明，可以用适合给定光催化反应器特定需求的UV-LED阵列代替高能量消耗源，从而获得合适的氧化结果，并且所获得的脱色率类似于使用常规灯 但是，与LED灯相比，UV-LED所需的电能要少70％（178与628 kW h / m ³ /阶）。因此，使用UV-LED可使当前的紫外线灯能耗降低3.5倍以上的染料。最后，正确选择阵列可以节省更多能源。