Structure and Photocatalytic Properties

Kato H, Kobayashi H, Kudo A (2002) Role of Ag" in the band structures and photocatalytic properties of AgMOs (M = Nb and Ta) with the perovskite structure. J Phys Chem B 106 12441-12447... 

Structure and photocatalytic property of nano-composites after calcination... 

Tang, J.W. and Ye, J.H. Correlation of crystal structures and electronic structures and photocatalytic properties of the W-containing oxides. Journal of Materials Chemistry, 2005. 15(39) p. 4246-4251. 

Zhang, H., Chen, G., Li, Y., and Teng, Y. (2010) Electronic structure and photocatalytic properties of copper-doped CaTiOa. Int. J. Hydrogen Energy, 35, 2713 2716. 

Zhou S, Kong Z, Wang Q, Li C (2012) Synthesis, structure and photocatalytic property of a novel 3D (3,8)-coimected metal-organic framework based on a flexible triphosphonate and a pentanuclear Cu(II) unit. Inorg Chem Commun 25 1—4... 

Mori R, Takahashi M, Yoko T (2005) Photoelectrochemical and photocatalytic properties of multilayered Ti02 thin films with a spinodal phase separation structure prepared by a sol-gel process. J Mater Res 20 121-127... 

The chapters in this volume present detailed insights into the synthesis-structure-properties relationships of nanostructured materials. In particular, the catalytic and photocatalytic properties of nanoclusters and nanostructured materials with ultrahigh surface-to-volume ratio are demonstrated. The gas absorption characteristics and surface reactivity of nanoporous and nanocrystalline materials are shown for various separation and reaction processes. In addition, the structural manipulation, quantum confinement effects, transport properties, and modeling of nanocrystals and nanowires are described. The biological functionality and bioactivity of nanostructured ceramic implants are also discussed. 

Monolithic zirconia networks can also be formed using a similar procedure giving porous 2xQ>2 structures [9]. As the titania and zirconia precursors are miscible, binary inorganic networks of various Ti Zr ratios could be produced [9]. The crystallinity and photocatalytic properties of the mixed material were studied X-ray amorphous materials were produced for Ti Zr ratios of 2 8 to 7 3, and the binary material containing 10% zirconia (the presence of which inhibited crystal transformation to the rutile phase) showed the highest photocatalytic activity for the photodecomposition of sahcylic acid and 2-chlorophenol [9]. 

Other uses of nanostructured chromophores may include fluorescent nanoparticles or nanoparticle-based porous materials that change their light absorption or emission when a toxin is encountered. Some metal oxides and POMs already exhibit such properties. Likewise, electrochemical properties, including induced photocurrents, could be sensitive to encountering a toxin. Clearly, both decontamination and detection are relevant aspects here. Basic research is needed on the design and synthesis of engineered nanostructures whose electronic structures, thermal catalytic, photophysical (emission), and photocatalytic properties are strongly perturbed by the presence or absence of toxic compounds. 

Korosi L, Oszko A, Galbacs G, Richardt A, Zollmer V, Dekany 1 (2(X)7b) Structuial properties and photocatalytic behaviour of phosphate-modified nanocrystalline titania films. Appl Catal B 77 175-183 Korosi L, Papp S, Beke S, Oszko A, Dekany I (2010) Effects of phosphate modification on the structure and surface properties of ordered mesoporous SnOj. Micropor Mesopor Mater 134 79-86 Korotcenkov G (2005) Gas response control through structural and chemical modification of meted oxides state of the art and approaches. Sens Actuators B Chem 107 209-232... 

Michalow K. A., Otal E. H., Bnrnat D., et al. Flame-made visible light active Ti02 Cr photocatalysts Correlation between structural, optical and photocatalytic properties. Catal. Today. 209 (2013) 47-53. 

Z. (2012) Structural, magnetic and photocatalytic properties of Sr -doped BiFeOs nanoparticles based on an ultrasonic irradiation assisted selfcombustion method. Ceram. Int,... 

Wen L, Wang F, Ftaig J, Lv K, Wang C, li D (2009) Structures, photoluminescence, and photocatalytic properties of six new metal—organic frameworks based on aromatic polycarboxylate acids and rigid imidazole-based synthons. Cryst Growth Des 9 3581—3589... 

Guo J, Yang J, Liu Y, Ma J (2012) Two novel 3D metal-organic frameworks based on two tetrahedral ligands syntheses, structures, photoluminescence and photocatalytic properties. CrystlingCortrm 14 6609-6617... 

All these results indicate that photocatalytic activity depends on the complete set of structural and textural properties of the semiconductor material, for example, porosity, pore size distribution, and the total mass deposited (thickness), but mainly on the total surface effectively irradiated with UV photons. 

Doping is important for semiconductors in order to tune their optical and electrical properties for the potential applications in biotechnology and solar cells [65]. Ag-doped hexagonal CdS nanoparticles were successfully obtained by an ultrasound-assisted microwave synthesis method. Here, the doping of Ag in to CdS nanoparticles induced the evolution of crystal structure from cubic to hexagonal. Further support from photocatalytic experiment also clearly indicates the doping of Ag clusters into the CdS matrix. 

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