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Improved charge separation through H2O2 assisted copper tungstate for enhanced photocatalytic efficiency for the degradation of organic dyes under simulated sun light.
Journal of Photochemistry and Photobiology B: Biology ( IF 3.9 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.jphotobiol.2020.111781 Mathew Waimbo 1 , Gabriel Anduwan 1 , Ora Renagi 1 , Srikanth Badhula 2 , Kenny Michael 1 , Jongwoo Park 3 , Senthilkumar Velusamy 1 , Yong Soo Kim 3
Journal of Photochemistry and Photobiology B: Biology ( IF 3.9 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.jphotobiol.2020.111781 Mathew Waimbo 1 , Gabriel Anduwan 1 , Ora Renagi 1 , Srikanth Badhula 2 , Kenny Michael 1 , Jongwoo Park 3 , Senthilkumar Velusamy 1 , Yong Soo Kim 3
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In the recent years, copper tungstate (CuWO4) 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, CuWO4 was synthesized through a facile and cost-effective solvothermal method, followed by annealing process at 700∘C. 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 CuWO4 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 H2O2 and thus MB dye was completely degraded within the time interval of 30 min while MO degraded in 75 min. These results prove that CuWO4 nanoparticles possess significant photocatalytic activity towards MO and MB dyes, thus indicating the feasibility of using CuWO4 for the active treatment of organic contaminants in the industrial effluents.
中文翻译：
通过H2O2辅助的钨酸铜改善电荷分离，从而提高了在模拟太阳光下降解有机染料的光催化效率。
近年来，钨酸铜（CuWO4）的光催化性能已得到广泛研究，因为它在可见光范围内具有响应能力，可以提高太阳能的利用率。在本报告中，通过一种简便且经济高效的溶剂热方法合成了CuWO4，然后在700°C下进行了退火处理。通过X射线衍射，扫描电子显微镜，紫外可见光，拉曼和光致发光研究来检查合成粉末的结构，形态，组成和光学性质。通过在一次阳光照射下水溶液中亚甲基蓝（MB）和甲基橙（MO）的降解来评估纳米结构CuWO4的光催化活性。在相同的照射时间下，在240分钟时，MB的降解效率约为70％，而MO的降解效率仅为57％。出人意料的是，通过加入电子捕获剂H2O2加速了降解过程，因此MB染料在30分钟的时间内完全降解，而MO在75分钟内降解。这些结果证明，CuWO4纳米粒子对MO和MB染料具有显着的光催化活性，从而表明使用CuWO4积极处理工业废水中有机污染物的可行性。
更新日期：2020-01-07
中文翻译：
通过H2O2辅助的钨酸铜改善电荷分离，从而提高了在模拟太阳光下降解有机染料的光催化效率。
近年来，钨酸铜（CuWO4）的光催化性能已得到广泛研究，因为它在可见光范围内具有响应能力，可以提高太阳能的利用率。在本报告中，通过一种简便且经济高效的溶剂热方法合成了CuWO4，然后在700°C下进行了退火处理。通过X射线衍射，扫描电子显微镜，紫外可见光，拉曼和光致发光研究来检查合成粉末的结构，形态，组成和光学性质。通过在一次阳光照射下水溶液中亚甲基蓝（MB）和甲基橙（MO）的降解来评估纳米结构CuWO4的光催化活性。在相同的照射时间下，在240分钟时，MB的降解效率约为70％，而MO的降解效率仅为57％。出人意料的是，通过加入电子捕获剂H2O2加速了降解过程，因此MB染料在30分钟的时间内完全降解，而MO在75分钟内降解。这些结果证明，CuWO4纳米粒子对MO和MB染料具有显着的光催化活性，从而表明使用CuWO4积极处理工业废水中有机污染物的可行性。
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