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Journal of Inorganic Materials

Journal of Inorganic Materials >

2008 , Vol. 23 >Issue 1: 55 - 60

DOI: https://doi.org/10.3724/SP.J.1077.2008.00055

Research Paper

Photobiological Effects of Nano-TiO2 Semiconductors Sol

  • ZHANG Ping ,
  • CUI Hai-Xin ,
  • LI Ling-Ling
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  • (Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

Received date: 2007-02-06

  Revised date: 2007-04-18

  Online published: 2008-01-20

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Abstract

Nano-TiO2 semiconductors sol (NTSS) was synthesized through a sol-gel method, and its antibacterial abilities were identified by using bacterial pathogens of Pseudomonos syringae pv. lachrymans and Xanthomonas vesicatoria. Taking cucumber plants as experimental objects, the photobiological effects of NTSS on preventing from plant bacterial/fungal diseases and promoting contents of photosynthetic pigments were primarily studied. Results show that crystal species of TiO2 particles synthesized in experiments are in anatase phase with average size of about 30.6nm. NTSS possesses strong oxidizing power with over 99.9% antibacterial rate by forming continuous and stable antibacterial films on surfaces of substance. Lesion areas, disease incidences and disease indexes of leaves can be significantly reduced by spraying NTSS on cucumber leaves; however, content of chlorophyll and carotenoid in leaves can be significantly promoted. It is proved that NTSS can significantly prevent and control the development and pervasion of bacterial angular leaf spot of cucumber. The experimental results lay an important theoretical foundation and technical approach for developing and applying of biofuntional nanomaterials in agricultural areas.

Key words： nanomaterial; TiO2; plant disease; prevention; photosynthetic pigments

Cite this article

ZHANG Ping , CUI Hai-Xin , LI Ling-Ling . Photobiological Effects of Nano-TiO2 Semiconductors Sol[J]. Journal of Inorganic Materials, 2008 , 23(1) : 55 -60 . DOI: 10.3724/SP.J.1077.2008.00055

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