Microbial Synthesis Of Titanium Phosphate And Titanium Phosphate Lithium

Because of the application prospects and properties in various fields, metal phosphate materials have received much attention and developed rapidly. But compared with other transition metal phosphates, the study on the synthesis of new titanium phosphate is badly lagged behind. Since 1990s, only ten species of titanium phosphate compounds have been reported.The titanium phosphate white powder is a kind of new inorganic chemical product. Because of its excellent properties, such as non-toxic, excellent adhesion, good rust resistance, the strong reflectivity of ultraviolet, excellent whitening effect, heat proof, flame retardancy and so on, titanium phosphate has been widely used in coating, ion exchanger, catalyst etc. In this study, we synthesized titanium phosphate and titanium phosphate lithium materials by biological synthesis method using the yeast cell template.In this article, the optimal synthesis conditions (the amount of template, the pH value of reaction solution and mineralization time, etc.) of mesoporous titanium phosphate was determined through experiments. On this basis, we synthesized titanium phosphate/carbon in-situ composites with certain pore structures using micro-organisms as the template, and briefly discussed the biomineralization mechanism of titanium phosphate in the surface of yeast cells by a series of tests and analyses. After measuring the fluorescence performance of titanium phosphate/carbon composite powder, we gave a brief analysis as well as a discussion about whether there were protein crystals in the supernatant fluid of the synthesized precursor.In order to prove that yeast cells are better than the other microbial templates, we have demonstrated its advantage by contrasting the titanium phosphate powder prepared with yeast cells to that prepared with the other two biological templates which can be easily obtained, theophylline and waste yeast.After that, we synthesized mesoporous nano-powder of titanium phosphate lithium using the pre-synthesized titanium phosphate as the precursor. The titanium phosphate lithium (phase composition, morphology and pore-size distribution, etc.) made by this method proved to be more valuable in practice comparing with that prepared with no templates.Finally, we determined the inhibition action of titanium phosphate powder prepared with yeast cell as the template using the inhibition zone method, and investigated the antibacterial mechanism. The comparison of antibacterial effects with silver series antimicrobial showed that the synthesized titanium phosphate had a stronger antibacterial performance toward gram-positive bacteria. Being simple in process and environmental friendly, this approach of synthesizing titanium phosphate has a positive effect in preparing low cost and high property antibacterial materials.