Significant Improvement and Mechanism of Ultrasonic Inactivation to Escherichia coli with Piezoelectric Effect of Hydrothermally Synthesized t-BaTiO3,ACS Sustainable Chemistry & Engineering

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Significant Improvement and Mechanism of Ultrasonic Inactivation to Escherichia coli with Piezoelectric Effect of Hydrothermally Synthesized t-BaTiO3
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-03-19 00:00:00 , DOI: 10.1021/acssuschemeng.7b04666
Jinxi Feng _{1,

2} , Yao Fu _{1,

2,

3} , Xiaosheng Liu _{1,

2} , Shuanghong Tian _{1,

2} , Shenyu Lan _{1,

2} , Ya Xiong _{1,

2}

Affiliation

Piezoelectric effect was first used for disinfection. In this process, hydrothermally synthesized nano/micrometer tetragonal-BaTiO₃ was selected as the piezo-catalyst which was stressed by ultrasound to generate piezoelectric potential. It was found that the inactivation number of the nano/micrometer tetragonal BaTiO₃ exposure or sonication alone within 180 min was 0.30 log and 0.70 log for E. coli in deionized water, respectively, while addition of 2 g tetragonal-BaTiO₃ with piezo-activity in the ultrasound system resulted in a 2.72 log inactivation without the input of any additional energy, only by original ultrasound. The latter was 2.72 folds as great as the sum of the two former inactivation numbers. However, addition of cubic-BaTiO₃ without piezo-activity only led to a 1.02 log inactivation. And moreover, in the process of serious physical damage and chemical oxidation of cells, substantial leakages of intracellular materials were observed. These great differences not only clearly indicated that the combination of sonication and piezocatalysis possessed a great inactivation potential but also suggested that there was a significant synergistic inactivation effect between piezocatalytic oxidation and sono-mechanical destruction.

中文翻译：

显著改进及超声波灭活机制大肠杆菌与水热合成的压电效应吨-BaTiO ₃

压电效应首先用于消毒。在该过程中，选择水热合成的纳米/微米四方BaTiO ₃作为压电催化剂，通过超声对其施加压力以产生压电势。发现在去离子水中，纳米/微米四方BaTiO ₃暴露或超声处理在180分钟内的失活数分别为0.30 log和0.70 log ，而添加2 g四方BaTiO _3时，大肠杆菌的失活数分别为0.30 log和0.70 log 。超声系统中具有压电活性的传感器仅在原始超声的作用下导致2.72 log失活，而无需输入任何额外的能量。后者是前两个失活数之和的2.72倍。然而，添加没有压电活性的立方BaTiO ₃仅导致1.02 log失活。而且，在严重的细胞物理损伤和化学氧化过程中，观察到细胞内物质大量泄漏。这些巨大的差异不仅清楚地表明了超声和压电催化的结合具有巨大的失活潜力，而且表明在压电催化氧化和声机械破坏之间存在显着的协同失活作用。

更新日期：2018-03-19

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