Abstract：
Development of nanoporous structures utilizing a single step of anodization technique is well recognized as a cost-effective and straightforward approach for several applications. In the current work, anodized alumina was developed with nanoporous structure by utilizing oxalic acid as an electrolyte with a continuous voltage of 40 V. The formed nanoporous structure was subjected to desalination application because of its high absorbance of broadband solar spectrum energy. The desalination setup consists of two solar stills namely conventional and modified. The developed structure is placed in the modified still to examine its performance. It was observed that the structure distributing heat to surrounding water by absorbing photon energy from the sun through the nanopores and giving an efficient pathway to the water vapours for developing effective desalination. The nanoporous structure having ~ 45 nm average diameter. Furthermore, the band gap energy of nanoporous structure was found to be ~ 2.5 eV (absorption spectrum fitting) and ~ 2.8 eV (Tauc plot). The nanoporous structure possess the visible light spectra in solar region which helps the band gaps of nanoporous structure to provide an additional supply of energy for generating more water to evaporate. Moreover, the Urbach energy of the structure is 0.5 eV which reveals less defects in the modified still. The overall distillate yield of modified still was increased to 21% in contrast to conventional. Water quality analysis was also carried out before and after the desalination experiments, and the results were within acceptable limits set by World Health Organization (WHO).
摘要：
利用单步阳极氧化技术开发纳米多孔结构被公认为是用于多种应用的成本有效且简单的方法。在目前的工作中,利用草酸作为电解质，在40V的连续电压下开发出具有纳米多孔结构的阳极氧化氧化铝。由于其对宽带太阳光谱能量的高吸收率，所形成的纳米多孔结构可用于脱盐应用。海水淡化装置由两个太阳能剧照组成，即常规和改良。将开发的结构放置在修改的静止中以检查其性能。观察到，该结构通过纳米孔吸收来自太阳的光子能量并为水蒸气提供有效的途径以发展有效的脱盐作用，从而将热量分配给周围的水。纳米多孔结构具有〜45nm的平均直径。此外，发现纳米多孔结构的带隙能量为〜2.5eV（吸收光谱拟合）和〜2.8eV（Tauc图）。纳米多孔结构具有太阳区域中的可见光光谱,这有助于纳米多孔结构的带隙提供额外的能量供应以产生更多的水蒸发。此外，该结构的Urbach能量为0.5eV，这表明改性后的缺陷较少。与常规相比，改性蒸馏物的总馏出物收率增加到21％。海水淡化实验前后也进行了水质分析,结果在世界卫生组织（WHO）设定的可接受范围内。
