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

Jenny Schneider,*,† Masaya Matsuoka,‡ Masato Takeuchi,‡ Jinlong Zhang, Yu Horiuchi,‡ Masakazu Anpo,‡ and Detlef W. Bahnemann*,† †Institut fur Technische Chemie, Leibniz Universitaẗ Hannover, Callinstrasse 3, D-30167 Hannover, Germany ‡Faculty of Engineering, Osaka Prefecture University, 1 Gakuen-cho, Sakai Osaka 599-8531, Japan Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China

Understanding TiO2 photocatalysis: mechanisms and materials.

In this chapter, we will restrict our attention to the ferrites and a few other closely related materials. The great interest in ferrites stems from their unique combination of a spontaneous magnetization and a high electrical resistivity. The observed magnetization results from the difference in the magnetizations of two non-equivalent sub-lattices of the magnetic ions in the crystal structure. Materials of this type should strictly be designated as “ferrimagnetic” and in some respects are more closely related to anti-ferromagnetic substances than they are to ferromagnetics in which the magnetization results from the parallel alignment of all the magnetic moments present. We shall not adhere to this special nomenclature except to emphasize effects, which are due to the existence of the sub-lattices.

Ferromagnetic materials

UV-Visible ار راد ن .د TiO2 ( تیفرظ راون مان هب نورتکلا یاراد یژرنا زارت لماش VB و ) رگید زارت ی یژرنا اب ( ییاناسر راون مان هب نورتکلا زا یلاخ و رتلااب VB یم ) .دشاب ت ود نیا نیب یژرنا توافت یژرنا فاکش زار ، پگ دناب هدیمان یم .دوش هک ینامز زا نورتکلا لاقتنا VB هب VB یم ماجنا دریگ ، TiO2 اب ودح یژرنا بذج د ev 2 / 3 ، نورتکلا تفج کی دیلوت یم هرفح .دیامن و نورتکلا هرفح ی نا اب هدش دیلوت یم کرتشم حطس هب لاقت ثعاب دناوت شنکاو ماجنا اه یی ددرگ . TiO2 دربراک ،دراد یدایز یاه هلمج زا یم ناوت اوه یگدولآ هیفصت یارب (CO2) و بآ و ... نآ زا هدافتسا درک .

Advanced Nanoarchitectures for Solar Photocatalytic Applications

Generations Yi Ma,† Xiuli Wang,† Yushuai Jia,† Xiaobo Chen,‡ Hongxian Han,*,† and Can Li*,† †State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences and Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China ‡Department of Chemistry, College of Arts and Sciences, University of Missouri-Kansas City, 5100 Rockhill Road, Kansas City, Missouri 64110, United States

Titanium dioxide-based nanomaterials for photocatalytic fuel generations.

The authors investigated the internal magnetic field induced by a spatially varying magnetization in a compositionally graded ferromagnet. The authors discuss results on a hexagonal ferrite sample, with a variation in saturation magnetization of 30emu∕g over a sample thickness of 2.5mm. The direct current magnetization shows a small anisotropy depending on the direction of the external magnetic field relative to the grading direction. This contribution from a grading induced magnetic field is more pronounced in alternating current susceptibility measurements. The authors find a shift in magnetic properties corresponding to an internal magnetic field of 30Oe, which is significantly lower than the predicted value of approximately 1900Oe. The authors discuss reasons for this discrepancy.

Internal magnetostatic potentials of magnetization-graded ferromagnetic materials

Enhanced magnetic and ferroelectric properties in scandium doped nano Bi2Fe4O9

We show that it is possible to tune the magnetic properties in MoS2 without any intentional magnetic dopants but by simply controlling the magnetically active defect sites. The layer thickness and ...

Tailoring Magnetically Active Defect Sites in MoS2 Nanosheets for Spintronics Applications

High-rate and long-cycle life performance of nano-porous nano-silicon derived from mesoporous MCM-41 as an anode for lithium-ion battery

We report the effect of surfactant treatment on the structural and magnetic properties of Mn-doped ZnO bulk (Zn 0.978Mn 0.022O) and Mn- and Li-codoped ZnO nanoparticles (Zn 0.96Mn 0.03Li 0.01O) prepared by low-temperature reaction. X-ray diffraction and transmission electron microscopy analyses of these samples showed the formation of impurity-free crystals with wurtzite ZnO structure. XPS data revealed that Mn exists in the 2+ oxidation state. TEM and HRTEM studies of sodium bis-2-ethylhexyl sulfosuccinate (AOT)-treated Zn 0.978Mn 0.022O showed predominantly rodlike microstructures developing into platelets and sizes in the range of 50-500 nm, whereas the AOT-treated Zn 0.96Mn 0.03Li 0.01O sample showed nearly spherical particles in the nanometer regime (20-30 nm). DC magnetization measurements as a function of field showed enhanced room temperature ferromagnetism for the surfactant-treated Zn 0.978Mn 0.022O and Zn 0.96Mn 0.03Li 0.01O. We discuss the possible role of surfactant and Li ion on the magnetic properties of Mn-doped ZnO.

Chandran Sudakar

Papers

Internal magnetostatic potentials of magnetization-graded ferromagnetic materials

Enhanced magnetic and ferroelectric properties in scandium doped nano Bi2Fe4O9

Tailoring Magnetically Active Defect Sites in MoS2 Nanosheets for Spintronics Applications

High-rate and long-cycle life performance of nano-porous nano-silicon derived from mesoporous MCM-41 as an anode for lithium-ion battery

Effect of Surfactant Treatment on the Magnetic Properties of Mn-Doped ZnO Bulk and Nanoparticles