We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Sustainable Strategy for the Synthesis of Pyrochlore H<sub>4</sub>Nb<sub>2</sub>O<sub>7</sub> Hollow Microspheres as Photocatalysts for Overall Water Splitting.
- Authors
Zhou, Chao; Shi, Run; Shang, Lu; Zhao, Yufei; Waterhouse, Geoffrey I. N.; Wu, Li‐Zhu; Tung, Chen‐Ho; Zhang, Tierui
- Abstract
A facile and green process was developed for the synthesis of pyrochlore H4Nb2O7 hollow microspheres by using hydrothermal treatment of Sn2Nb2O7 hollow microspheres in aqueous 2m HCl at 100-180°C. The facile transformation of Sn2Nb2O7 into H4Nb2O7 is facilitated by the intrinsic ion-exchange capability of Sn2Nb2O7. The resulting H4Nb2O7 hollow microspheres (diameter 1-2μm, shell thickness 100-200nm) displayed excellent photocatalytic performance for overall water splitting under UV irradiation, affording H2 and O2 evolution rates of 240 and 116μmolh-1g-1, respectively. Following decoration with 0.5wt% Pt, the H4Nb2O7 hollow microspheres demonstrated remarkably high H2 and O2 evolution rates of 1240 and 600μmolh-1g-1, respectively. To our knowledge, this work is the first reported study examining the photocatalytic performance of H4Nb2O7 for water splitting. The hydrothermal synthesis method described here is also applicable to the synthesis of pyrochlore H4Ta2O7 from Sn2Ta2O7, highlighting the versatility of the approach.
- Subjects
PYROCHLORE; OXIDE synthesis; MICROSPHERES; PHOTOCATALYSTS; WATER electrolysis
- Publication
ChemPlusChem, 2017, Vol 82, Issue 2, p181
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.201600501