Department of Applied Physics, Papua New Guinea University of Technology, Lae, Morobe Province, Papua New Guinea.
Department of Applied Sciences, Papua New Guinea University of Technology, Lae, Morobe Province, Papua New Guinea.
J Photochem Photobiol B. 2020 Mar;204:111781. doi: 10.1016/j.jphotobiol.2020.111781. Epub 2020 Jan 7.
In the recent years, copper tungstate (CuWO) has been widely researched for its photocatalytic properties as it responds in the visible light range to augment the utilization of solar energy. In the present report, CuWO was synthesized through a facile and cost-effective solvothermal method, followed by annealing process at 700C. The structural, morphological, compositional and optical property of the synthesized powders were examined by X-ray diffraction, scanning electron microscope, UV-visible, Raman and photoluminescence studies. The photocatalytic activity of the nanostructured CuWO was evaluated by the degradation of methylene blue (MB) and methyl orange (MO) in aqueous solution under one sun light irradiation. The degradation efficiency of MB was found to be about 70% while that of MO was only 57% at 240 min in the same irradiation time. Surprisingly, the degradation process was accelerated by the addition of electron capturing agent HO and thus MB dye was completely degraded within the time interval of 30 min while MO degraded in 75 min. These results prove that CuWO nanoparticles possess significant photocatalytic activity towards MO and MB dyes, thus indicating the feasibility of using CuWO for the active treatment of organic contaminants in the industrial effluents.
近年来，由于铜钨酸盐（CuWO）在可见光范围内具有光催化性能，能够提高太阳能的利用率，因此受到了广泛的研究。在本报告中，通过简便且经济有效的溶剂热法合成了 CuWO，并在 700°C 下进行退火处理。通过 X 射线衍射、扫描电子显微镜、紫外-可见、拉曼和光致发光研究对合成粉末的结构、形态、组成和光学性质进行了检查。通过在单阳光照射下在水溶液中降解亚甲基蓝（MB）和甲基橙（MO）评估了纳米结构 CuWO 的光催化活性。在相同的照射时间内，MB 的降解效率约为 70%，而 MO 的降解效率仅为 57%。令人惊讶的是，添加电子捕获剂 HO 后，降解过程会加速，因此在 30 分钟的时间间隔内，MB 染料完全降解，而 MO 在 75 分钟内降解。这些结果证明 CuWO 纳米粒子对 MO 和 MB 染料具有显著的光催化活性，这表明 CuWO 可用于有效处理工业废水中的有机污染物。
