Synergistic Effects in Nanoengineered HNb3O8/Graphene Hybrids with Improved Photocatalytic Conversion Ability of CO2 into Renewable Fuels

详细信息    查看全文

• 作者：He Liu ; Haitao Zhang ; Peng Shen ; Feixiong Chen ; Suojiang Zhang
• 刊名：Langmuir
• 出版年：2016
• 出版时间：January 12, 2016
• 年：2016
• 卷：32
• 期：1
• 页码：254-264
• 全文大小：683K
• ISSN：1520-5827

文摘

Layered HNb₃O₈/graphene hybrids with numerous heterogeneous interfaces and hierarchical pores were fabricated via the reorganization of exfoliated HNb₃O₈ nanosheets with graphene nanosheets (GNs). Numerous interfaces and pores were created by the alternative stacking of HNb₃O₈ nanosheets with limited size and GNs with a buckling and folding feature. The photocatalytic conversation of CO₂ into renewable fuels by optimized HNb₃O₈/G hybrids yields 8.0-fold improvements in CO evolution amounts than that of commercial P25 and 8.6-fold improvements than that of HNb₃O₈ bulk powders. The investigation on the relationships between microstructures and improved photocatalytic performance demonstrates that the improved photocatalytic performance is attributed to the exotic synergistic effects via the combination of enhanced specific BET surface area, increased strong acid sites and strong acid amounts, narrowed band gap energy, depressed electron–hole recombination rate, and heterogeneous interfaces.