太陽光を利用した水中細菌の新規光触媒処理システムの開発

• Project/Area Number: 18J20620
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 国内
• Research Field: Hygiene and public health
• Research Institution: University of Tsukuba
• Principal Investigator: LIU NA 筑波大学, 生命環境科学研究科, 特別研究員(DC1)
• Project Period (FY): 2018-04-25 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥2,200,000 (Direct Cost: ¥2,200,000); Fiscal Year 2020: ¥700,000 (Direct Cost: ¥700,000); Fiscal Year 2019: ¥700,000 (Direct Cost: ¥700,000); Fiscal Year 2018: ¥800,000 (Direct Cost: ¥800,000)
• Keywords: Photocatalyst / Glue immobilization / Water disinfection / Various bacteria / Disinfection mechanism / High stability / Visible-light-driven / Solar-light-driven / Gram-positive / Gram-negative

Outline of Annual Research Achievements

During the third fiscal year of my research, in order to test the practical application potential of the newly developed glue-immobilized P/Ag/Ag2O/Ag3PO4/TiO2 (PAgT) photocatalyst system for continuous-cycle sterilization, the study was carried out through the following three key points. (1) Evaluate the photocatalytic inactivation ability of the glue-immobilized PAgT photocatalyst for different kinds of pathogenic bacteria. (2) Investigate the stability and recyclability of the developed glue-immobilized photocatalyst reactor for the continuous-cycle water sterilization. (3) Clarify the disinfection mechanism involved during the immobilized PAgT photocatalyst system for the efficient water sterilization.
The result showed that the newly developed glue-immobilized PAgT photocatalyst system could effectively inactivate various pathogenic bacteria under light irradiation with excellent stability and reusability. The enhanced antibacterial performance of immobilized PAgT system was due to a synergistic effect of disinfection mechanism combining the improved photocatalysis on the introduction of heterojunction structure, and the mechanical stress driven from the composite sharp edge morphology. The present results reveal the possibility of applying the developed silicone glue-immobilized PAgT system for real water sterilization under solar light to further improve the public health level around the world, especially in the rural areas or at the time of disaster.

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Sol-gel/hydrothermal two-step synthesis strategy for promoting Ag species modified TiO2-based composite activity towards H2 evolution under solar light. (2021)
  • Author(s): Zhu, Q., Liu, N., Ma, Q., Sharma, Aditya, Nagai, D., Sun, X., Zhang, C., Yang, Y. N.
  • Journal Title: Materials Today Energy. Volume: 20 Pages: 100648-100648
  • DOI: 10.1016/j.mtener.2021.100648
  • Peer Reviewed
• [Journal Article] Photon number based anaerobic digestion process for efficient bio-methane conversion from ammonium-rich feedstock: Performance evaluation and practical potential (2021)
  • Author(s): Zhu Yunxin、Zhang Nan、Liu Zhiyuan、Liu Na、Sharma Aditya、Chen Guoping、Yang Yingnan
  • Journal Title: Energy Conversion and Management Volume: 238 Pages: 114155-114155
  • DOI: 10.1016/j.enconman.2021.114155
  • Peer Reviewed
• [Journal Article] PEG assisted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with enhanced elimination of emerging organic pollutants in salinity condition under solar light illumination. (2020)
  • Author(s): Sharma, Aditya, Liu, N., Ma, Q., Zheng, H. Y., Kawazoe, N., Chen, G., Yang, Y. N.
  • Journal Title: Chemical Engineering Journal. Volume: 385 Pages: 123765-123765
  • DOI: 10.1016/j.cej.2019.123765
  • Peer Reviewed
• [Journal Article] Polyethylene glycol (PEG)-modified Ag/Ag2O/Ag3PO4/Bi2WO6 photocatalyst film with enhanced efficiency and stability under solar light (2020)
  • Author(s): Ma, Q., Hu, X., Liu, N., Sharma, Aditya, Zhang, C., Kawazoe, N., Chen, G., Yang, Y. N.
  • Journal Title: Journal of Colloid and Interface Science. Volume: 569 Pages: 101-113
  • DOI: 10.1016/j.jcis.2020.02.064
  • Peer Reviewed
• [Journal Article] Layered Ag/Ag2O/BiPO4/Bi2WO6 heterostructures by two-step method for enhanced photocatalysis (2020)
  • Author(s): Hu Xiaohong、Ma Qiansu、Wang Xinlong、Yang Yingjun、Liu Na、Zhang Cheng、Kawazoe Naoki、Chen Guoping、Yang Yingnan
  • Journal Title: Journal of Catalysis Volume: 387 Pages: 28-38
  • DOI: 10.1016/j.jcat.2020.04.002
  • Peer Reviewed
• [Journal Article] Superior disinfection effect of Escherichia coli by hydrothermal synthesized TiO2-based composite photocatalyst under LED irradiation: Influence of environmental factors and disinfection mechanism (2019)
  • Author(s): Liu Na、Zhu Qi、Zhang Nan、Zhang Cheng、Kawazoe Naoki、Chen Guoping、Negishi Nobuaki、Yang Yingnan
  • Journal Title: Environmental Pollution Volume: 247 Pages: 847-856
  • DOI: 10.1016/j.envpol.2019.01.082
  • Peer Reviewed
• [Journal Article] Development of Solar-light-driven Photocatalyst for energy and environmental application (2019)
  • Author(s): Liu, N, Zhu Q., Zhang, N., Wang, J., Yang, Y. N.
  • Journal Title: Materials Science and Engineering Volume: 印刷中
  • Peer Reviewed
• [Presentation] Photocatalytic disinfection of novel composites Ag/Ag2O/BiPO4/Bi2WO6 under solar light irradiation (2021)
  • Author(s): Ming, J., Liu, N., Ma, Q., Yang, Y. N.
  • Organizer: 第９回日本生物工学会東日本支部コロキウム
• [Presentation] Highly Efficient Inactivation of Harmful Pathogenic Bacteria by a Stable Visible-light-driven TiO2-based Photocatalyst (2020)
  • Author(s): Liu, N., Ma, Q., Sharma, A., Ming, J., Yang, Y. N.
  • Organizer: Water and Environment Technology (WET) Conference 2020-online
• [Presentation] Effective Elimination of Seawater Pollutants Using Surfactant Modified Using TiO2-based Composite Under Solar Light Illumination (2020)
  • Author(s): Sharma, A., Liu, N., Ma, Q. S., Yano, M., Yang, Y. N.
  • Organizer: Water and Environment Technology (WET) Conference 2020-online
• [Presentation] Photocatalytic Inactivation of Escherichia coli by Ag/Ag2O/BiPO4/Bi2WO6 under Solar Light Irradiation: Effect of Environmental Factors and Disinfection Mechanism (2020)
  • Author(s): Ming, J., Liu, N., Ma, Q. S., Yang, Y. N.
  • Organizer: Water and Environment Technology (WET) Conference 2020-online
• [Presentation] Development of an Adjustable Solar Light Tracking Reactor for Superior Photocatalytic Wastewater Treatment (2020)
  • Author(s): Zhang, C., Liu, N., Ming, J., Ma, Q. S., Yang, Y. N.
  • Organizer: Water and Environment Technology (WET) Conference 2020-online
• [Presentation] Efficient destruction of different pathogenic microorganisms by a novel visible-light-driven TiO2-based photocatalyst (2020)
  • Author(s): Liu, N., Yang, Y. N.
  • Organizer: 第 8 回日本生物工学会東日本支部コロキウム
• [Presentation] Solar-light-driven Water Splitting for Hydrogen Evolution by A Novel TiO2 Based Photocatalyst (2020)
  • Author(s): Liu, N., Ma, Q., Ming, J., Negishi, N., Yang, Y. N.
  • Organizer: 85th SCEJ Annual meeting
• [Presentation] Characterization and Application of Non-ionic Surfactant Assisted TiO2 Based Composite for Enhanced Degradation of Organic Pollutant in Seawater (2020)
  • Author(s): Sharma A. Ma Q. S. Liu N. Zheng H., Yang, Y. N.
  • Organizer: 85th SCEJ Annual meeting
• [Presentation] Development of High Performance Graphene Oxide Modified Bi2WO6 Based Photocatalyst for Wastewater Treatment (2020)
  • Author(s): Ma Q. S. Ming J. Liu N., Zhang C., Yang, Y. N.
  • Organizer: 85th SCEJ Annual meeting
• [Presentation] Synergistic Effect of 3D Hierarchical Microsphere TiO2 by Carbon Doping for The Photocatalytic Antibiotic Degradation (2020)
  • Author(s): Sun X. Xu S. Liu N. Qi R., Yang, Y. N.
  • Organizer: 85th SCEJ Annual meeting
• [Presentation] Different Inactivation Behaviors of Gram-Positive and Gram-Negative Bacteria in TiO2 Based Photocatalytic Disinfection (2019)
  • Author(s): Liu, N., Zhang, C., Nobuaki, N., Yang, Y. N.
  • Organizer: 71st Society for Biotechnology Annual Meeting
• [Presentation] Investigation of Solar Driven Linear Fresnel Photocatalytic Reactor (LFP) for Wastewater Treatment (2019)
  • Author(s): Zhang, C., Liu, N., Ma, Q., Yagi, A., Yang, Y. N.
  • Organizer: 71st Society for Biotechnology Annual Meeting
• [Presentation] Green Route for Hydrogen Evolution from Pure Water Splitting Induced by A Solar Light Responsive Photocatalyst (2019)
  • Author(s): Liu, N., Nagai, D., Qi, R., Yang, Y. N.
  • Organizer: The 2019 International Postgraduate Academic Forum
  • Int'l Joint Research
• [Presentation] Effective Wastewater Treatment with the Developed Liner Fresnel Photocatalytic reactor (LFP) Under Real Solar Light (2019)
  • Author(s): Zhang, C., Liu, N., Yagi, A., Yang, Y. N.
  • Organizer: The 2019 International Postgraduate Academic Forum
  • Int'l Joint Research
• [Presentation] Characterization and Application of PEG modified TiO2 Based Photocatalyst for Improving Degradation of Organic Pollutant in Seawater (2019)
  • Author(s): Sharma, A., Liu, N., Ma, Q., Zheng, H., Yang, Y. N.
  • Organizer: The 2019 International Postgraduate Academic Forum
  • Int'l Joint Research
• [Presentation] Development of Hydrothermal Synthesized Polyethylene Glycol Modified P/Ag/Ag2O/Ag3PO4/TiO2 Photocatalyst with Enhanced Photocatalytic Activity for Wastewater Treatment Under Visible Light Irradiation (2019)
  • Author(s): Yagi, A., Liu, N., Ma, Q., Zhang, C., Yang, Y. N.
  • Organizer: The 2019 International Postgraduate Academic Forum
  • Int'l Joint Research
• [Presentation] Super-effective visible-light-induced photocatalytic water disinfection by a novel P/Ag/Ag2O/Ag3PO4/TiO2 composite and its mechanism (2019)
  • Author(s): Liu, N., Ma, Q., Zhang, C., Yang, Y. N.
  • Organizer: International Conference on Environmental Protection and Climate Change 2019
  • Int'l Joint Research
• [Presentation] Insights into photocatalytic inactivation mechanism of a novel hydrothermal synthesized P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior bactericidal activity (2019)
  • Author(s): Liu, N., Ma, Q., Negishi, N., Yang, Y. N.
  • Organizer: 第７回日本生物工学会東支部コロキウム
• [Presentation] Continuous Bio-hydrogen Production by Iron-modified Zeolite Addition in Hybrid Fixed-bed Reactor (2019)
  • Author(s): Zhao, C. Y., Zhang, N., Zheng, H. Y., Liu, N., Sharma, A., Yang, Y. N.
  • Organizer: The 53rd Annual Conference of JSWE
• [Presentation] Enhanced Photocatalytic Activity of Graphene Oxide Modified Visible-light-driven Photocatalysts for Organic Pollutant Degradation (2019)
  • Author(s): Gu, W., Ma, Q. S., Liu, N., Zhang, N., Yang, Y. N.
  • Organizer: 84th SCEJ Annual Meeting
• [Presentation] Development of Linear Fresnel Photoreactor (LFP) for Water Purification Under Solar Light Irradiation (2019)
  • Author(s): Zhang, C., Liu, N., Ma, Q. S., Zhang, N., Yang, Y. N.
  • Organizer: 84th SCEJ Annual Meeting
• [Presentation] Effective Treatment of Seawater Pollutants Under Simulated Solar Light Using Modified-TiO2 Photocatalyst (2019)
  • Author(s): Sharma, A., Liu, N., Zhang, N., Ma, Q. S., Zhao, C. Y., Yang, Y. N.
  • Organizer: 84th SCEJ Annual Meeting
• [Presentation] Fabrication of High Performance and Stability Bi2WO6 Based Photocatalytic Thin Film Doping with Polyethylene Glycol for Wastewater Treatment (2019)
  • Author(s): Ma, Q. S., Liu, N., Sharma, A., Zhang, N., Yang, Y. N.
  • Organizer: 84th SCEJ Annual Meeting
• [Presentation] Photocatalytic Disinfection Performance in Gram-Negative/Gram-Positive Bacteria Mixed System by A Novel TiO2-Based Composite (2019)
  • Author(s): Liu, N., Ma, Q. S., Zhang, C., Sharma, A., Yang, Y. N.
  • Organizer: 84th SCEJ Annual Meeting
• [Presentation] Comparison of The Photocatalytic Inactivation Between Two Model Microorganisms: Gram-Positive Enterococcus Sp. and Gram-Negative E. coli (2018)
  • Author(s): Liu, N., Zhu, Q., Zhang, N., Ma, Q. S., Negishi, N., Yang, Y. N.
  • Organizer: The 11th Japan-China-Korea Graduate Student Forum
  • Int'l Joint Research
• [Presentation] Development of Polyethylene Glycol Modified Bi2WO6-based Composite Photocatalytic Thin Film with High Photocatalytic Activity for Wastewater Treatment under Visible Light (2018)
  • Author(s): Ma, Q. S., Liu, N., Zhang, N., Sharma, A., Yang, Y. N.
  • Organizer: The 11th Japan-China-Korea Graduate Student Forum
  • Int'l Joint Research
• [Presentation] Effect of Salinity on Degradation of Organic Pollutants in Seawater Using TiO2-Based Composite Photocatalyst (2018)
  • Author(s): Sharma, A., Zheng, H. Y., Liu, N., Zhao, C. Y., Zhang, N., Yang, Y. N.
  • Organizer: The 11th Japan-China-Korea Graduate Student Forum
  • Int'l Joint Research
• [Presentation] Investigating the Effects of Bioreactor Design and Continuous Nutrition Release from Bed Material During the Hydrogen Fermentation (2018)
  • Author(s): Zhao, C. Y., Zhang, N., Zheng, H. Y., Liu, N., Yang, Y. N.
  • Organizer: The 11th Japan-China-Korea Graduate Student Forum
  • Int'l Joint Research