Sunlight as the most abundant renewable energy holds the promise to make our society
sustainable. However, due to its low power density and intermittence, efficient conversion …

As one of the most prevalent metal oxides on Earth, iron oxide, especially α-Fe2O3 or
hematite, has been the subject of intense research for several decades. In particular, the …

The demand for clean energy technologies has spurred academic interest in new and
efficient ways to capture and store sunlight. 1-6 Concerted efforts are now being directed …

W oxide films are of critical importance for electrochromic device technology, such as for
smart windows capable of varying the throughput of visible light and solar energy. This …

Mesoporous semiconducting films consisting of preferentially orientated monoclinic-phase
nanocrystals of tungsten trioxide have been prepared using a novel version of the sol− gel …

The aim of this review paper is to give an overview of the development and implications of
nanotechnology in photocatalysis. The topics covered include a detailed look at the unique …

Bismuth vanadate (BiVO4) with a band gap of∼ 2.4 eV has emerged as one of the visible
photocatalysts that can absorb light below 520 nm. The electron/hole pairs that are …

Photoinduced electron accumulation in ZnO nanoparticles results in the bleaching of the
exciton band as well as quenching of green emission. In the absence of an electron …

Photochromic materials are attractive and promising for applications in many fields. One
subject in this area is to prepare and study the photochromism in composite or hybrid …

We demonstrate that two large categories of compounds, namely, polyoxometallates
(produced by acid condensation of mainly tungstates and/or molybdates) and aggregates of …