There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications

This critical review shows the basis of photocatalytic water splitting and experimental points, and surveys heterogeneous photocatalyst materials for water splitting into H2 and O2, and H2 or O2 evolution from an aqueous solution containing a sacrificial reagent Many oxides consisting of metal cations with d0 and d10 configurations, metal (oxy)sulfide and metal (oxy)nitride photocatalysts have been reported, especially during the latest decade The fruitful photocatalyst library gives important information on factors affecting photocatalytic performances and design of new materials Photocatalytic water splitting and H2 evolution using abundant compounds as electron donors are expected to contribute to construction of a clean and simple system for solar hydrogen production, and a solution of global energy and environmental issues in the future (361 references)

Heterogeneous photocatalyst materials for water splitting

2.3. Evaluation of Photocatalytic Water Splitting 6507 2.3.1. Photocatalytic Activity 6507 2.3.2. Photocatalytic Stability 6507 3. UV-Active Photocatalysts for Water Splitting 6507 3.1. d0 Metal Oxide Photocatalyts 6507 3.1.1. Ti-, Zr-Based Oxides 6507 3.1.2. Nb-, Ta-Based Oxides 6514 3.1.3. W-, Mo-Based Oxides 6517 3.1.4. Other d0 Metal Oxides 6518 3.2. d10 Metal Oxide Photocatalyts 6518 3.3. f0 Metal Oxide Photocatalysts 6518 3.4. Nonoxide Photocatalysts 6518 4. Approaches to Modifying the Electronic Band Structure for Visible-Light Harvesting 6519

Semiconductor-based Photocatalytic Hydrogen Generation

TiO2 photocatalysis and related surface phenomena

In situ investigation on the interaction of NO and CO with Cu+/ZSM-5 catalyst

The partial photocatalytic oxidation of methane with NO led to the selective methanol formation over the V-MCM-41 catalysts under UV irradiation at 295 K, while only a complete oxidation of methane proceeded in the presence of O 2 . The yield of methanol well corresponded to the yield of the photoluminescence due to the isolated tetrahedral V + -oxides species, indicating that the charge transfer excited triplet state of these species plays an importat role in the reaction.

Selective photocatalytic oxidation of methane into methanol on V-MCM-41 mesoporous molecular sieves

“Single-site” Ti-oxide species incorporated within the framework or cavities of zeolites as well as mesoporous materials in an isolated state exhibit high and unique photocatalytic activity for various reactions such as the direct decomposition of NO into N2 and O2 and the reduction of CO2 with H2O to produce CH4 and CH3OH. Various in situ spectroscopic investigations using photoluminescence, XAFS (XANES and FT-EXAFS), and ESR techniques revealed that the photo-excited triplet states of the single-site Ti-oxide species play a vital role in these photocatalytic reactions. The photocatalytic activity as well as the selectivity of the Ti-oxide species strongly depends on their local structures. Furthermore, it has been demonstrated that ion-implantation is an effective technique in modifying the electronic properties of single-site Ti-oxide photocatalysts, enabling them to absorb and operate as highly efficient photocatalysts under visible light irradiation (λ > 420 nm).

Local Structures, Excited States, and Photocatalytic Reactivities of “Single-Site” Ti-Oxide Photocatalysts Constructed Within Zeolites or Mesoporous Materials

High-Rate Sputtering with Electron Cyclotron Resonance and Electric-Mirror Excitation

Corrigendum to “The effect of the framework structure on the chemical properties of the vanadium oxide species incorporated within zeolites”: [Catalysis Today 78 (2003) 211–217]

Masaya Matsuoka

Papers

In situ investigation on the interaction of NO and CO with Cu+/ZSM-5 catalyst

Selective photocatalytic oxidation of methane into methanol on V-MCM-41 mesoporous molecular sieves

Local Structures, Excited States, and Photocatalytic Reactivities of “Single-Site” Ti-Oxide Photocatalysts Constructed Within Zeolites or Mesoporous Materials

High-Rate Sputtering with Electron Cyclotron Resonance and Electric-Mirror Excitation

Corrigendum to “The effect of the framework structure on the chemical properties of the vanadium oxide species incorporated within zeolites”: [Catalysis Today 78 (2003) 211–217]