Atomic layer deposition in nanometer-level replication of cellulosic substances and preparation of photocatalytic TiO2/cellulose composites

J Am Chem Soc. 2005 Oct 19;127(41):14178-9. doi: 10.1021/ja0532887.

Abstract

TiO2 replicas of filter paper with nanometer-level accuracy were prepared by atomic layer deposition of thin conformal TiO2 coating, followed by a removal of the paper by air-anneal at 450 degrees C. Photocatalytic anatase TiO2/cellulose composites were also made by leaving the paper intact. The TiO2 films were deposited from Ti(OMe)4 and H2O at 150-250 degrees C. The photocatalytic activity of the TiO2/cellulose composite was verified by photocatalytic reduction of Ag(I) from an aqueous solution to Ag nanoparticles on the TiO2 surface. The TiO2/cellulose composites are mechanically more stable than the free-standing TiO2 replicas and are therefore potentially suitable as lightweight, high surface area photocatalysts.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Catalysis
  • Cellulose / chemical synthesis
  • Cellulose / chemistry*
  • Membranes, Artificial*
  • Nanostructures / chemistry*
  • Particle Size
  • Photochemistry
  • Surface Properties
  • Titanium / chemistry*
  • X-Ray Diffraction

Substances

  • Membranes, Artificial
  • titanium dioxide
  • Cellulose
  • Titanium