Gold/titania Nanorod Assembled Urchin-like Photocatalysts with an Enhanced Hydrogen Generation by Photocatalytic Biomass Reforming

Cai Shi,1, #

Weijie Yuan,1, #

Keqi Qu,1

Junming Shi,1

Malin Eqi,1

Xushen Tan,1

Zhanhua Huang,1*Email

Felipe Gándara,2*Email

Duo Pan,3, 5

Nithesh Naik,4

Yixiang Zhang1

Zhanhu Guo5*Email

1 Key Laboratory of Bio-based Material Science and Technology, Northeast Forestry University, Ministry of Education, Harbin 150040, China

2 Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM)-Consejo Superior de Investigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz, 3, Madrid 28049, Spain

3 Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, China

4 Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, Karnataka, India

5 Integrated Composites Laboratory (ICL), Department of Chemical and Bimolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA

Abstract

Herein, we successfully constructed Au/hierarchical urchin-like TiO2 architectures (Au/HT) photocatalysts, which were assembled by crystalline nanorods by one-step solvothermal method under mild conditions. The as-prepared samples showed an outstandingly renewable H2 evolution by the photocatalytic glucose reforming. Au/HT revealed a high H2 evolution rate of 616.23 μmol h-1 g-1 under visible-light irradiation at low temperatures without any additional Pt co-catalyst, which was about 46.23 and 15.81 times than that of P25 and HT, since the (one-dimensional) 1D nanorods could effectively accelerate electron transfer and restrain the recombination of photogenerated carriers, meanwhile, (three-dimensional) 3D hierarchical architectures could improve the light capturing capability of HT, and surface-plasmon resonance (SPR) effect of Au nanoparticles, which further improved the separation efficiency of photogenerated charges, extended the visible light absorption, and accelerated the H2 generation. This work offers a potential way to produce sustainable H2 from environmentally renewable biomass materials using solar energy.

Gold/titania Nanorod Assembled Urchin-like Photocatalysts with an Enhanced Hydrogen Generation by Photocatalytic Biomass Reforming