Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Cerro de La Venada S/n, Pueblito de Rocha, 36040, Guanajuato, Mexico.
Departamento de Ingeniería Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/n, 36050, Guanajuato, Mexico.
Chemosphere. 2023 Oct;339:139666. doi: 10.1016/j.chemosphere.2023.139666. Epub 2023 Jul 31.
Today, water shortage problems around the world have forced the search for new treatment alternatives, in this context, electrochemical oxidation technology is a hopeful process for wastewater treatment, although it is still needed exploration of new efficient and economically viable electrode materials. In this way, mixed metal oxide anodes look like promising alternatives but their preparation is still a significant point to study, searching for finding low-cost materials to improve electrocatalytic efficiencies. In an exploration of this kind of highly efficient materials, this work presents the results obtained using an MMO Ti/IrO-SnO-SbO anode. All the prepared anodes exhibited excellent physical and electrochemical properties. The electrochemical oxidation of 100 mL and 200 mg L Reactive Orange 84 (RO 84) diazo dye was studied using 3 cm of such synthesized anodes by applying current densities of 25, 50, and 100 mA cm. Faster and more efficient electrochemical oxidation occurred at 100 mA cm with 50 mM of NaSO + 10 mM NaCl as supporting electrolyte at pH 3.0. The degradation and mineralization processes of the above solution were enhanced with the electro-Fenton process with 0.05 mM Fe and upgraded using photoelectron-Fenton with UVA light. This process yielded 91% COD decay with a low energy consumption of 0.1137 kWh (g COD) at 60 min. The evolution of a final carboxylic acid like oxalic was followed by HPLC analysis. The Ti/IrO-SnO-SbO is then an efficient and low-cost anode for the photoelectro-Fenton treatment of RO 84 in a chloride and sulfate media.
如今，世界各地的水资源短缺问题迫使人们寻求新的处理方法，在此背景下，电化学氧化技术是一种很有前途的废水处理工艺，尽管仍需要探索新的高效且经济可行的电极材料。在这种情况下，混合金属氧化物阳极看起来是很有前途的替代品，但它们的制备仍然是一个需要研究的重要问题，需要寻找低成本材料来提高电催化效率。在探索这种高效材料的过程中，本工作展示了使用 MMO Ti/IrO-SnO-SbO 阳极获得的结果。所有制备的阳极均表现出优异的物理和电化学性能。通过使用这种合成的阳极 3cm 长，在电流密度为 25、50 和 100mAcm 的条件下，研究了 100mL 和 200mgL 的活性艳橙 84（RO 84）偶氮染料的电化学氧化。在 pH 3.0 下，以 50mM 的 NaSO 和 10mM 的 NaCl 作为支持电解质，在 100mAcm 的电流密度下，更快、更高效的电化学氧化发生。在电芬顿过程中添加 0.05mM 的 Fe 和使用 UVA 光升级的光电芬顿过程中，增强了上述溶液的降解和矿化过程。该过程在 60min 内以 0.1137kWh（gCOD）的低能耗实现了 91%的 COD 衰减。通过 HPLC 分析，跟踪最终羧酸类物质，如草酸的演变。Ti/IrO-SnO-SbO 是一种高效、低成本的阳极，可用于在氯化物和硫酸盐介质中进行光电芬顿处理 RO 84。
