Photoelectrochemical sterilization of microbial cells by semiconductor powders

Matsunaga, Tadashi; Tomoda, R.; Nakajima, Toshiaki; Wake, Hitoshi

doi:10.1111/j.1574-6968.1985.tb00864.x

Cited by 1,288 publications

(431 citation statements)

References 7 publications

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“…Matsunaga et al (44,45) Once formed, these highly reactive radical species seem to play a key role in promoting the indirect oxidation of organic substances (Eqs. 9-11, Scheme 3).…”

Section: Mechanisms Of Self-disinfection Activity On Tiomentioning

confidence: 99%

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

et al. 2011

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Int J Artif Organs ( 2011; : 9) 929-946 34 TITANIUM OXIDE AND ANTIBACTERIAL SURFACES IN BIOMEDICAL DEVICES Device-related infections: a clinical demand driving material science researchAn increasing number of clinical procedures requires the use of biomedical devices, whose widespread presence in modern therapeutic treatments is driving the demand for better performances and longer reliability. One of the major issues of both short-term devices and implantable prostheses is represented by device-related infections (DRIs) Accepted: August 31, 2011 rEViEW due to bacterial colonization and proliferation (1). About half of the 2 million cases of nosocomial infections that occur each year in the United States are associated with indwelling devices (2): these infections generally require a longer period of antibiotic therapy and repeated surgical procedures, resulting in potential risks for the patient and increased costs for the healthcare system. The planktonic bacteria that colonize a device surface tend to form a biofilm and the sessile bacterial cells, enclosed in a self-produced polymeric matrix of this kind, can withstand host immune responses and generally show extraordinary antibiotic resistance (3). Eventually, bacteria rapid multiply and disperse in planktonic form, giving rise

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“…Matsunaga et al (44,45) Once formed, these highly reactive radical species seem to play a key role in promoting the indirect oxidation of organic substances (Eqs. 9-11, Scheme 3).…”

Section: Mechanisms Of Self-disinfection Activity On Tiomentioning

confidence: 99%

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

et al. 2011

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“…There are some different opinions about the bactericidal mechanisms of these photocatalysts. In the early studies, Matsunaga et al 1,2 proposed that the direct oxidation of coenzymes in TiO 2 -treated cells, which led to the decrease in respiratory activities, was the reason for cell death. Recently, it was proposed that the destruction of the cell structure resulted in cell death.…”

Section: Introductionmentioning

confidence: 99%

“…1 Since then, numerous studies related to the bactericidal effect of TiO 2 photocatalysts have been reported. [2][3][4][5][6][7][8][9][10] TiO 2 photocatalysts have also been applied to inactivate bacteria, viruses, and cancer cells.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Pathogenic Bacteria with AgI/TiO₂ under Visible Light Irradiation

et al. 2007

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The photocatalytic disinfection of pathogenic bacteria in water was investigated systematically with AgI/TiO 2 under visible light (λ > 420 nm) irradiation. The catalyst was found to be highly effective in killing Escherichia coli and Staphylococcus aureus. The adsorbed • OH and h VB + on the surface of the catalyst were proposed to be the main active oxygen species by study of electron spin resonance and the effect of radical scavengers. The process of destruction of the cell wall and the cell membrane was verified by TEM, potassium ion leakage, lipid peroxidation, and FT-IR measurements. Some products from photocatalytic degradation of bacteria such as aldehydes, ketones, and carboxylic acids were identified by FT-IR spectroscopy. These results suggested that the photocatalytic degradation of the cell structure caused the cell death. The electrostatic force interaction of the bacteria-catalyst significantly affected the efficiency of disinfection on the basis of the E. coli inactivation under different conditions.

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“…The nanocrystalline Bismuth Tungstate materials have been successfully synthesized using Bi(NO 3 ) 3 .5H 2 O and Na 2 WO 4 .2H 2 O as a starting material by microwave assisted hydrothermal process. The synthesized materials are in nano form having crystallite size of ~ 24 nm.…”

Section: Resultsmentioning

confidence: 99%

“…A number of studies on TiO 2 photocatalyst have been done by different scientists. In 1985, Matsunaga et al studied on photochemical sterilization of microbial cells by semiconductor powders [3]. Then research further broadens the scope of semiconductor photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano Materials by Microwave Assisted Hydrothermal Method

et al. 2015

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Bismuth tungstate nano materials have been successfully synthesized by microwave assisted hydrothermal method. Bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O) and sodium tungstate (Na 2 WO 4 .2H 2 O) are used as a starting material for the preparation of nano materials and solution pH was maintained to 3. The prepared material was characterized by X-ray diffraction (XRD) to study the phase state, whereas surface morphology was observed by Scanning Electron Microscopy (SEM). The surface area was determined by Brunauer-Emmett-Teller (BET) method. The results revealed that materials are crystalline in nature having crystallite size of ~ 24 nm with surface area of 6.5 m 2 /g. SEM image of prepared materials showed a unique discrete hierarchical morphology. The prepared material showed visible light active photocatalytic nature for the decomposition of Rhodamine B.

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Photoelectrochemical sterilization of microbial cells by semiconductor powders

Cited by 1,288 publications

References 7 publications

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

Photocatalytic Degradation of Pathogenic Bacteria with AgI/TiO₂ under Visible Light Irradiation

Synthesis of Nano Materials by Microwave Assisted Hydrothermal Method

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Photoelectrochemical sterilization of microbial cells by semiconductor powders

Cited by 1,288 publications

References 7 publications

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

Titanium Oxide Antibacterial Surfaces in Biomedical Devices

Photocatalytic Degradation of Pathogenic Bacteria with AgI/TiO2 under Visible Light Irradiation

Synthesis of Nano Materials by Microwave Assisted Hydrothermal Method

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Product

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Photocatalytic Degradation of Pathogenic Bacteria with AgI/TiO₂ under Visible Light Irradiation