Li Jingjing, Guo Chenpeng, Li Lihua, Gu Yongjun, Kim BoK-Hee, Huang Jinliang
School of Materials Science and Engineering, Henan University of Science and Technology Luoyang 471023 China
Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang 471023 China.
RSC Adv. 2021 Jul 6;11(38):23700-23706. doi: 10.1039/d1ra03149j. eCollection 2021 Jul 1.
Tungsten trioxide (WO) nanoarrays with different morphologies were successfully synthesized by a hydrothermal method on an FTO substrate. Various nanostructures of WO including nanoflakes, nanoplates, nanoflowers and nanorods were obtained by adjusting only the acidity of the precursor solution. XRD patterns confirmed that the as-prepared orthorhombic WO·0.33HO transformed to the monoclinic WO phase under annealing at 500 °C. UV-Vis absorbance spectroscopy indicated that the absorption edge of WO nanoflowers exhibited a slight red-shift compared to other morphologies of WO. The obtained WO nanoflower arrays exhibit the highest photocurrent density and photocatalytic degradation activity towards methylene blue. Finally, the mechanism of the photocatalytic degradation of methylene blue by WO is discussed.
通过水热法在FTO衬底上成功合成了具有不同形貌的三氧化钨（WO₃）纳米阵列。仅通过调节前驱体溶液的酸度，就获得了WO₃的各种纳米结构，包括纳米薄片、纳米板、纳米花和纳米棒。XRD图谱证实，制备的正交晶系WO₃·0.33H₂O在500℃退火下转变为单斜晶系WO₃相。紫外-可见吸收光谱表明，与其他形貌的WO₃相比，WO₃纳米花的吸收边缘呈现出轻微的红移。所制备的WO₃纳米花阵列对亚甲基蓝表现出最高的光电流密度和光催化降解活性。最后，讨论了WO₃光催化降解亚甲基蓝的机理。
