Nanostructured materials for photocatalytic hydrogen production
Artikel i vetenskaplig tidskrift, 2009

Photocatalytic hydrogen (H-2) production represents a very promising but challenging contribution to a clean, sustainable and renewable energy system. The photocatalyst material plays a key role in photocatalytic H-2 production, and it has proven difficult to obtain corrosion resistant, chemically stable, visible light harvesting and highly efficient photocatalysts, which have their band edges matching the O-2 and H-2 production levels. Nanoscience and nanotechnology are opening a new vista in the development of highly active, nanostructured photocatalysts with large surface areas for optimized light absorption, minimized distances (or times) for charge-carrier transport, and further favorable properties. Our focus here is on recently developed nanostructured photocatalysts. In particular. the particle size, chemical composition (including dopants), microstructure, crystal phase. morphology, surface modification, bandgap and flat-band potential of the nanophotocatalysts have shown a visible effect on photocatalytic H-2 production rates, which may be further increased by adding sensitizers, cocatalysts or scavengers. Finally, potential directions required to push this research field a step further are highlighted. (

Semiconductor

Water splitting

activity tio2

TiO2

shuttle redox mediator

Solar light

calcium niobate

z-scheme

Light harvesting

sol-gel process

Photocatalyst

Nanomaterials

titanium-oxide

Visible light

aqueous-methanol solution

visible-light irradiation

H-2

Nanostructured materials

h-2 evolution

surfactant template

Hydrogen

Photocaralysis

Författare

Jiefang Zhu

Chalmers, Teknisk fysik, Kemisk fysik

Michael Zäch

Chalmers University of Technology

Current Opinion in Colloid and Interface Science

1359-0294 (ISSN)

Vol. 14 260-269

Ämneskategorier

Fysikalisk kemi

DOI

10.1016/j.cocis.2009.05.003