Mu Xiao, Lianzhou Wang*, Bin Luo, Songcan Wang, Miaoqiang Lyu

 

Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland
St Lucia QLD 4072, Australia

 

Photocatalytic water splitting is promising for zero-emission hydrogen production, which has attracted worldwide attention1 Tantalum nitride (Ta3N5) with a suitable bandgap (~2 eV) is regarded as one of the most promising photocatalysts for efficient solar energy harvesting and conversion.2 However, Ta3N5 suffers from low hydrogen production activity due to the low carrier mobility and fast carrier recombination.3 Thus how to design Ta3N5 nanostructures to facilitate charge carrier transport and improve photocatalytic performance remains a challenge. Here we report a new type of ultrathin (~2 nm) Ta3N5 nanomeshes with high specific surface area (284.6 m2/g) and excellent crystallinity by an innovative bottom-up graphene oxide (GO) templated strategy. The resultant Ta3N5 nanomeshes demonstrate drastically improved electron transport ability and prolonged lifetime of charge carriers, due to the nature of high surface area and excellent crystallinity. As a result, the Ta3N5 nanomeshes as photocatalysts, exhibit a remarkable over tenfold improvement of solar hydrogen production compared to its bulk counterpart. This work provides an effective and generic strategy for designing 2D ultrathin nanomesh structures for non-layered materials with improved catalytic activity

 

References

1T. Hisatomi, J. Kubota, K. Domen, Chem. Soc. Rev. 2014, 43, 7520

2 H. Tong, S. Ouyang, Y. Bi, N. Umezawa, M. Oshikiri, J. Ye, Adv. Mater. 2012, 24, 229

3 A. Ziani, E. Nurlaela, D. S. Dhawale, D. A. Silva, E. Alarousu, O. F. Mohammed, K. Takanabe, Phys. Chem. Chem. Phys. 2015, 17, 2670

 

Biographic Details

Name: Mu Xiao

Title: Ms.

Affiliation, Country: China

Phone: +61 0413132009

E-mail: m.xiao@uq.edu.au

Research interests: Functional nanomaterials, clean energy, photocatalysis