title: WO3/g-C3N4composites: one-pot preparation and enhanced photocatalytic H2production under visible-light irradiation.
abstract: A series of WO3/g-C3N4composites with different WO3contents were prepared via a facile one-pot pyrolysis method, and showed notably enhanced visible-light-driven photocatalytic H2-evolution activities, with the highest rate of 400 μmol h-1gcat-1that was 15.0 times of that for pristine g-C3N4. Contents and sizes of WO3crystallites in the composites were easily adjusted by changing the molar ratios of (NH4)2WS4to C3H6N6in the feed reagents, thereby successfully optimizing the Z-scheme system constructed by WO3and g-C3N4and thus effectively reducing the recombination of photogenerated charge carriers in g-C3N4. Moreover, pore volumes and surface areas of the composites were gradually enlarged by introducing WO3into g-C3N4via the one-pot preparation strategy, therefore promoting the redox reactions to evolve H2. This work presented an effective route to simultaneously optimize the phase compositions and textural structures of photocatalysts for enhanced H2evolution.
authors.affiliation: International Research Center for Renewable Energy (IRCRE), State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), 28 West Xianning Road, Xi'an 710049, People's Republic of China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Cheng
authors.forename: Jinwen
authors.initials: J
authors.lastname: Shi
authors.forename: Yuchao
authors.initials: Y
authors.lastname: Hu
authors.forename: Liejin
authors.initials: L
authors.lastname: Guo