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

Using a combination of in-situ XAFS, photoluminescence and diffuse reflectance measurements, the characterization of the coordination geometry of metal (Cu, Ag) ion photocatalysts prepared within zeolites by an ion-exchange method and thermovacuum treatment has been carried out. The metal ions within zeolites were found to exist as isolated monomers, dimers and clusters, their relative concentration strongly depending of types of zeolites used Within ZSM-5 and mordenite zeolites, most of the metal ions (Cu + , Ag + ) were found to exist as isolated monomers with low coordinate numbers (planar 3 or linear 2 coordinate geometry), in contrast to the case of the Y-zeotite having dimers and/or clusters.

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XAFS Studies on the Metal Ion (Cu, Ag) Photocatalysts Prepared Within Zeolite Cavities Using an Ion-Exchange Method

Publisher Summary This chapter discusses the effect of the framework structure on the chemical properties of the vanadium oxide species incorporated within zeolites and their photocatalytic reactivity X-ray absorption fine structure (XAFS) and phosphorescence studies, including lifetime measurements of the several types of vanadium silicalite catalysts shows the oxidation state and coordination geometry of the highly dispersed V-oxides as well as the local distortion structure of these species in their framework structures Dynamic quenching studies of the phosphorescence by adding reactant molecules exhibit that the charge transfer excited triplet state of these V-oxides and act as active sites for the photocatalytic decomposition reactions of nitric oxide (NO) both in the presence and absence of propane, their reactivity being strongly dependent on the framework structure of these catalysts

14-P-20-The effect of the framework structure on the chemical properties of the vanadium oxide species incorporated within zeolites and their photocatalytic reactivity

PROBLEM TO BE SOLVED: To provide a photocatalyst that exhibits a high photocatalytic activity in both an ultraviolet region and visible light region. SOLUTION: A nitrogen-substituted titanium oxide thin film is produced by RF magnetron sputtering process with a target as titanium oxide under the conditions in a nitrogen-containing inert gas atmosphere and at a substrate temperature of 400°C or higher. The nitrogen substituted-type titanium oxide contains no rutile structure or nitrogen substitution rate is 1.5% or more. The nitrogen-substituted titanium oxide exhibits optical absorbency in both the ultraviolet region and visible light region as shown in a graph in Fig. 1. COPYRIGHT: (C)2008,JPO&INPIT

Photocatalyst, method for manufacturing photocatalyst, method for electrolyzing water, method for producing hydrogen, electrolyzer, and hydrogen produing device

Investigation of the Local Structure of Vanadium Silicalite Catalyst(VS-1)Using XAFS,FT-IR and Photoluminescence Spectroscopic Methods (Proceedings of the Second International Conference on SRMS(Synchrotron Radiation in Materials Science)(2))

The mechanism of the Cope rearrangement of 1,5-hexadienes remains controversial. Two pathways for the rearrangement of 2,5-diphenyl-1,5-hexadiene have been debated over the past several decades. Th...

Design, Generation, and Characterization of a 1,5-Hexadiene Bearing Two Lophyl Radicals as a Probe of the Stepwise Mechanism for the Cope Rearrangement

Masaya Matsuoka

Papers

XAFS Studies on the Metal Ion (Cu, Ag) Photocatalysts Prepared Within Zeolite Cavities Using an Ion-Exchange Method

14-P-20-The effect of the framework structure on the chemical properties of the vanadium oxide species incorporated within zeolites and their photocatalytic reactivity

Photocatalyst, method for manufacturing photocatalyst, method for electrolyzing water, method for producing hydrogen, electrolyzer, and hydrogen produing device

Investigation of the Local Structure of Vanadium Silicalite Catalyst(VS-1)Using XAFS,FT-IR and Photoluminescence Spectroscopic Methods (Proceedings of the Second International Conference on SRMS(Synchrotron Radiation in Materials Science)(2))

Design, Generation, and Characterization of a 1,5-Hexadiene Bearing Two Lophyl Radicals as a Probe of the Stepwise Mechanism for the Cope Rearrangement