| 研究実績の概要 |
During the first fiscal year of my research, the photocatalytic inactivation ability of a novel solar-light-driven P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst on two different types of microorganisms was systematically studied both in single and mixed bacteria system. According to previous studies, the novel solar-light-driven P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst, firstly synthesized by our lab, has shown remarkable disinfection ability on Gram-negative E. coli. Considering in real water environment, Gram-negative and Gram-positive bacteria are usually coexistent, as such, it is of practical significance to investigate the photocatalytic inactivation efficiency on Gram-negative and Gram-positive bacteria, respectively, in single and mixed bacteria system.
In order to clarify the novel photocatalyst disinfection ability on different types of microorganisms, the study was carried out through the following three key points. (1) Comparison of the photocatalytic inactivation between different types microorganisms: Gram-positive and Gram-negative. (2) Evaluation of the photocatalytic disinfection performance both in single and mixed bacteria system.(3) Investigation of the bacteria damage process during the photocatalytic disinfection process.
The results showed the novel P/Ag/Ag2O/Ag3PO4/TiO2 composite could effectively inactivate both Gram-negative and Gram-positive bacterium either in single or mixed bacteria system.The present study results will help optimize engineering parameters in future application of this novel photocatalyst in large-scale wastewater disinfection system.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
In FY 2018, with the aim of "clarifying the photocatalytic inactivation ability of the novel solar-light-driven P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst on two different types of microorganisms",the research was conducted from three categories:(1) Comparison of the photocatalytic inactivation between different types microorganisms: Gram-positive and Gram-negative. (2) Evaluation of the photocatalytic disinfection performance both in single and mixed bacteria system. (3) Investigation of the bacteria damage process during the photocatalytic disinfection process.The present study results will help optimize engineering parameters in future application of this novel photocatalyst in large-scale wastewater disinfection system.
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| 今後の研究の推進方策 |
Based on the result obtained in the previous fiscal year, the novel P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with remarkable disinfection ability for both Gram-negative and Gram-positive bacteria, can be very suitable for practical bacterial inactivation. Therefore, in this fiscal year, following the research plan, to further scale up the present reactor system and make full use of the solar light energy, a continuous-cycle photocatalytic disinfection system based on the Inclined Plate Collectors (IPC) photoreactor will be developed. Moreover, the optimum conditions of this solar photocatalytic disinfection system will be established, including reaction volume, flow rate and initial concentration of bacteria by using different types of bacteria. Compared to other photoreactor designs, the significantly simplified design and low material cost of this inclined plate photoreactor makes it particularly suitable for use in economically and logistically challenged areas.
Based on the above experiments, the results will be summarized and presented on conferences. Also, the research paper will be summarized and submitted to the international journal.
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