López-Ayala Susana, Menchaca Campos Elsa C, Méndez-Rojas Miguel A, Rincón Marina E
Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Chamilpa, Cuernavaca 62209, Mexico.
Departamento de Ciencias Químico-Biológicas, Escuela de Ciencias, Universidad de las Américas Puebla, Ex Hda. de Santa Catarina Mártir s/n, San Andrés Cholula, Puebla 72820, Mexico.
Gels. 2025 Apr 25;11(5):319. doi: 10.3390/gels11050319.
Research on hydrogen (H) production has been intensively investigated due to the critical need for transitioning from fossil fuels to cleaner energy sources. This study demonstrates a dual-purpose approach where water pollutant degradation and H production occur simultaneously, eliminating the need for sacrificial materials and reducing costs. CuO-TiO calcined xerogels were employed in solutions containing NaOH and acid black dye 1 (AB1). The CuO-TiO/AB1/NaOH system successfully degraded recalcitrant pollutants while producing H under optimized conditions. H evolution occurred at the photocatalyst holes due to AB1's lower potential compared to water, while AB1 decomposition proceeded via O2 radical formation. X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) analyses showed sponge-like structures with 20 nm crystals. Polarization curves confirmed H generation in the cathodic region. Bode diagrams of the CuO-TiO/AB1/NaOH system (0.3 M NaOH and 60 mg/L AB1) exhibited noble/passive behavior, consistent with the polarization curve data. Using 0.3-0.4 M NaOH and 60 mg/L AB1, 636-647 ppb H/g was produced in 60 min, and only 0.07 mg/L AB1 was left as indicated by absorbance measurements at 618 nm. H evolution decreased as dye degradation increased. The best system for dye degradation has a k constant of 0.066 min and R of 0.99, contains 40 mg/L AB1, and runs at 40 °C, whereas the maximum dual performance required 0.5 M NaOH, yielding 5050 ppb H/g.
由于从化石燃料向清洁能源过渡的迫切需求，氢气（H）生产的研究受到了广泛关注。本研究展示了一种双重目的的方法，即水污染物降解和氢气生产同时发生，无需牺牲材料并降低了成本。将煅烧的CuO-TiO干凝胶用于含有NaOH和酸性黑染料1（AB1）的溶液中。在优化条件下，CuO-TiO/AB1/NaOH系统成功降解了难降解污染物并产生了氢气。由于AB1的电位低于水，在光催化剂孔处发生析氢反应，而AB1的分解通过O2自由基的形成进行。X射线衍射（XRD）和扫描电子显微镜（SEM）分析显示具有20nm晶体的海绵状结构。极化曲线证实了在阴极区域产生氢气。CuO-TiO/AB1/NaOH系统（0.3M NaOH和60mg/L AB1）的波特图表现出惰性/钝性行为，与极化曲线数据一致。使用0.3 - 0.4M NaOH和60mg/L AB1，在60分钟内产生了636 - 647ppb H/g的氢气，并且通过在618nm处的吸光度测量表明仅剩下0.07mg/L的AB1。析氢量随着染料降解量的增加而减少。染料降解的最佳系统的k常数为0.066min，R为0.99，含有40mg/L AB1，并在40°C下运行，而最大双重性能需要0.5M NaOH，产生5050ppb H/g。
