Environmentally-friendly biomimicking synthesis of TiO2 nanomaterials using saccharides to tailor morphology, crystal phase and photocatalytic activity

Owing to its broad applications and fundamental importance, a synthesis method with the capability to tailor TiO2 with different crystal phases and morphologies has attracted significant research attention. In this work, an environmentally-friendly biomimetic synthesis was developed to fabricate TiO2 nanomaterials. It is interesting to discover that saccharides as biotemplates to synthesize TiO2 cannot only direct the formation of the desired architectural nanocrystals but also significantly affect the crystal phase. The results further indicate that rutile TiO2 is obtained by using β-cyclodextrin and chitosan, while anatase TiO2 is formed by using soluble starch. The nanomaterials obtained by using different saccharides show higher photocatalytic activity than those without using the biotemplate. The possible mechanisms for the nanostructures growth and their photocatalytic activity are proposed. This work demonstrates an advanced synthetic method to structurally refine nanotitania with a higher degree of functionality while possessing an environmentally-friendly nature.

[1]  L. Véron,et al.  Synthesis and structural characterization of chitosan nanogels. , 2009, Langmuir : the ACS journal of surfaces and colloids.

[2]  B. You,et al.  Facile Fabrication and High Photoelectric Properties of Hierarchically Ordered Porous TiO2 , 2012 .

[3]  A. Gedanken,et al.  Fabrication of magnetite nanorods by ultrasound irradiation , 2001 .

[4]  Stephen Mann,et al.  Synthesis of cadmium sulphide superlattices using self-assembled bacterial S-layers , 1997, Nature.

[5]  Gaoke Zhang,et al.  Facile Synthesis of Monodisperse Porous ZnO Spheres by a Soluble Starch-Assisted Method and Their Photocatalytic Activity , 2011 .

[6]  Weize Wu,et al.  Replication of biological organizations through a supercritical fluid route. , 2005, Chemical communications.

[7]  Jong Hak Kim,et al.  Graft copolymer directed synthesis of micron-thick organized mesoporous TiO2 films for solid-state dye-sensitized solar cells. , 2011, Chemical communications.

[8]  R. L. Penn,et al.  Size-dependent anatase to rutile phase transformation and particle growth , 2013 .

[9]  A. Bhaumik,et al.  Self-assembled TiO(2) nanoparticles: mesoporosity, optical and catalytic properties. , 2010, Dalton transactions.

[10]  Sonal Thakore,et al.  Morphology and antibacterial activity of carbohydrate-stabilized silver nanoparticles. , 2010, Carbohydrate research.

[11]  A. Bard,et al.  Heterogeneous photocatalytic decomposition of saturated carboxylic acids on titanium dioxide powder. Decarboxylative route to alkanes , 1978 .

[12]  Z. Tang,et al.  Facile synthesis of Au@TiO2 core–shell hollow spheres for dye-sensitized solar cells with remarkably improved efficiency , 2012 .

[13]  Yong‐Mook Kang,et al.  Rational design of 3D dendritic TiO2 nanostructures with favorable architectures. , 2011, Journal of the American Chemical Society.

[14]  Feng Li,et al.  Battery Performance and Photocatalytic Activity of Mesoporous Anatase TiO2 Nanospheres/Graphene Composites by Template‐Free Self‐Assembly , 2011 .

[15]  Dianzeng Jia,et al.  Environment-friendly biomimetic synthesis of TiO2 nanomaterials for photocatalytic application , 2012, Nanotechnology.

[16]  Hiroshi Ogawa,et al.  Novel Photoanode Structure Templated from Butterfly Wing Scales , 2009 .

[17]  T. Kunitake,et al.  Preparation and Thermal Stability of Gold Nanoparticles in Silk-Templated Porous Filaments of Titania and Zirconia , 2004 .

[18]  Y. Liu,et al.  Bioinspired Synthesis of Vertically Aligned ZnO Nanorod Arrays: Toward Greener Chemistry , 2009 .

[19]  L. Qi,et al.  Synthesis of mesoporous titania networks consisting of anatase nanowires by templating of bacterial cellulose membranes. , 2005, Chemical communications.

[20]  Dominik Samuelis,et al.  Sustained Lithium‐Storage Performance of Hierarchical, Nanoporous Anatase TiO2 at High Rates: Emphasis on Interfacial Storage Phenomena , 2011 .

[21]  P. Fornasiero,et al.  Nonaqueous synthesis of TiO2 nanocrystals using TiF4 to engineer morphology, oxygen vacancy concentration, and photocatalytic activity. , 2012, Journal of the American Chemical Society.

[22]  Richeng Yu,et al.  Synthesis of high-quality brookite TiO2 single-crystalline nanosheets with specific facets exposed: tuning catalysts from inert to highly reactive. , 2012, Journal of the American Chemical Society.

[23]  A. Xu,et al.  Synthesis, Characterization, and Formation Mechanism of Copper Sulfide-Core/Carbon-Sheath Cables by a Simple Hydrothermal Route , 2008 .

[24]  B. Nair,et al.  Synthesis of iron oxide nanoparticles using chitosan and starch templates , 2008 .

[25]  Wei Zhou,et al.  Solar-induced self-assembly of TiO2-beta-cyclodextrin-MWCNT composite wires. , 2009, Physical chemistry chemical physics : PCCP.

[26]  Dong Yang,et al.  Eggshell Membrane Templating of Hierarchically Ordered Macroporous Networks Composed of TiO2 Tubes , 2002 .

[27]  Vincenzo Grillo,et al.  Nonhydrolytic synthesis of high-quality anisotropically shaped brookite TiO2 nanocrystals. , 2008, Journal of the American Chemical Society.

[28]  Di Zhang,et al.  Enhanced Light‐Harvesting and Photocatalytic Properties in Morph‐TiO2 from Green‐Leaf Biotemplates , 2009 .

[29]  M. Young,et al.  Protein Engineering of a Viral Cage for Constrained Nanomaterials Synthesis , 2002 .

[30]  J. Desbrières,et al.  Influence of acetic acid concentration on the solubilization of chitosan , 1999 .

[31]  Di Li,et al.  β-Cyclodextrin controlled assembling nanostructures from gold nanoparticles to gold nanowires☆ , 2004 .

[32]  M. Moeller,et al.  Tenside-free preparation of nanogels with high functional β-cyclodextrin content. , 2012, ACS nano.

[33]  Francisco N. Newby,et al.  Fabrication of porous titania (Brookite) microparticles with complex morphology by sol-gel replication of pollen grains , 2006 .