Engineered WO3 nanorods for conformal growth of WO3/BiVO4 core-shell heterojunction towards efficient photoelectrochemical water oxidation
Engineered WO3 nanorods for conformal growth of WO3/BiVO4 core-shell heterojunction towards efficient photoelectrochemical water oxidation
复制标题
工程化 WO3 纳米棒，用于 WO3/BiVO4 核壳异质结的保形生长，以实现高效的光电化学水氧化
DOI：
10.1007/s10854-016-6082-0
复制
发表时间：
2017
影响因子：
2.8
通讯作者：
Wang Lu
中科院分区：
文献类型：
--
作者：
Su Jinzhan;Zhang Tao;Wang Lu
采用溶剂热法生长了铵钨青铜（（NH 4）0.33·WO 3）纳米棒，通过生长后的转变得到了高长径比的WO 3纳米棒。研究了封端剂、反应温度和退火温度对（NH 4）0.33·WO 3薄膜形貌和性能的影响，并探讨了（NH 4）0.33·WO 3纳米棒的生长机理。结果表明，在合适的反应温度下，NH 4+对棒状形貌的形成起着关键作用。合成的（NH 4）0.33·WO 3在500 °C空气中退火，除去铵离子，得到单斜晶系WO 3纳米棒。利用PLD技术制备了共形的WO 3/BiVO 4异质结，扩大了其光收集范围，增强了电荷分离。异质结的特点是证明有效的光催化水分解的核壳阵列的基础上构建的高纵横比纳米线。
High aspect ratio WO3nanorods were obtained by post growth transformation of ammonium tungsten bronze ((NH4)0.33·WO3) nanorods which are grown via a facile solvothermal method. Influence of capping agents, reaction temperature and annealing temperature on the morphologies and performances of (NH4)0.33·WO3films have been investigated and the growth mechanism of (NH4)0.33·WO3nanorods was also explored. The results show that NH4+plays a key role for formation of rod-like morphology at appropriate reaction temperature. Monoclinic WO3nanorods were obtained via removal of ammonium by annealing the synthesized (NH4)0.33·WO3at 500 °C in air. Conformal WO3/BiVO4heterojunction was also synthesized using PLD to extend its light harvest range as well as enhance the charge separation. The heterojunction was characterized to demonstrate efficient photocatalytic water splitting by core–shell arrays constructed based on high aspect ratio nanowires.