Designing novel 0D/1D/2D NiO@La(OH)3/g-C3N4 heterojunction for enhanced photocatalytic hydrogen production
Yanhong Wang, Le Gao, Jiaqi Huo, Yawen Li, Weiwei Kang, Chunxiao Zou, Lishan Jia
Abstract
Structure design of heterojunction photocatalysts is highly desirable for making full use abilities of each component and junction. Herein, we designed a one-pot in-situ top-down and bottom-up combination strategy to construct novel 0D/1D ordered NiO@La(OH) 3 heterostructure derived from NiO@LaNiO 3 using high-temperature hydrothermal treatment. The 0D/1D NiO@La(OH) 3 heterostructure had better charge transport capability than its single component and the corresponding mechanical mixture. Furthermore, NiO@La(OH) 3 and g-C 3 N 4 self-assembled into 0D/1D/2D NiO@La(OH) 3 /g-C 3 N 4 ternary hierarchical heterostructure photocatalyst by electrostatic interaction. The synergistic effect of 0D/1D/2D architecture and ternary heterojunction boost the internal separation and interface transmission of its photocarriers. Therefore, the obtained 0D/1D/2D NiO@La(OH) 3 /g-C 3 N 4 ternary photocatalyst exhibited significantly enhanced photocatalytic H 2 evolution activity, comparable to related g-C 3 N 4 -based photocatalysts. This work enriches our insight into designing novel hierarchical heterostructure catalysts.