title: Synthesis, characterization, and antibacterial activity of chitosan/TiO2 nanocomposite against Xanthomonas oryzae pv. oryzae.
abstract: This present study deals with synthesis, characterization and antibacterial activity of chitosan/TiO2 nanocomposites. Results indicated that chitosan/TiO2 nanocomposite at the ratio of 1:5 showed the strongest inhibition in growth of rice bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo). Furthermore, the antibacterial activity of chitosan/TiO2 nanocomposite against Xoo is significantly higher than that of the two individual components under both light and dark conditions. Regardless of the presence or absence of extracellular polymeric substances, chitosan/TiO2 nanocomposite showed strong antibacterial activity, however, the absence increased the sensitivity of Xoo to chitosan/TiO2 nanocomposite. In addition, the surface morphology and physicochemical properties of chitosan/TiO2 nanocomposite is different from the two individual components based on scanning electron microscopic observation, fourier transform infrared spectra, and X-ray diffraction pattern, as well as elemental and thermo gravimetric analysis. Overall, this study indicated that this synthesized chitosan/TiO2 nanocomposite is promising to be developed as a new antibacterial material.
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China. Electronic address: libin0571@zju.edu.cn.
authors: Bin
authors: B
authors: Li
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors: Yang
authors: Y
authors: Zhang
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors: Yingzi
authors: Y
authors: Yang
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors: Wen
authors: W
authors: Qiu
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors: Xiaoxuan
authors: X
authors: Wang
authors: State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors: Baoping
authors: B
authors: Liu
authors: State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
authors: Yanli
authors: Y
authors: Wang
authors: State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. Electronic address: sungc01@sina.com.
authors: Guochang
authors: G
authors: Sun
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D048271:Chitosan / Q000737:chemistry / Q000494:pharmacology; D053761:Nanocomposites / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology; D014974:Xanthomonas / Q000254:growth & development*
chemical_list: D000900:Anti-Bacterial Agents; C009495:titanium dioxide; D048271:Chitosan; D014025:Titanium
keywords: Antibacterial activity; Characterization; Chitosan; Chitosan/TiO(2) nanocomposite; TiO(2); X. oryzae pv. oryzae