Bi-based photocatalysts for bacterial inactivation in water: Inactivation mechanisms, challenges, and strategies to improve the photocatalytic activity

Zuarez-Chamba, Michael; Rajendran, Saravanan; Herrera‐Robledo, Miguel; Priya, A.K.; Navas‐Cárdenas, Carlos

doi:10.1016/j.envres.2022.112834

Cited by 57 publications

(5 citation statements)

References 208 publications

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“…The highest occupied molecular orbital (HOMO) energy of Ag/NM125 was lower than the potential energies of OH − / • OH (+1.99 eV) 35 and H 2 O/ • OH (+2.38 eV), 35 as determined through UV−vis DRS and Mott−Schottky analyses. This indicated that • OH was not directly generated from OH − (or H 2 O).…”

Section: Effect Of the Coexisting Dbp Precursors On Bacterial Inactiv...mentioning

confidence: 85%

Ag Nanoparticle and Ti–MOF Cooperativity for Efficient Inactivation of E. coli in Water

Sun,

Pan,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Because of the limitations of traditional chlorine-based bactericidal water treatment, such as the formation of disinfection byproducts (DBPs) and resistance to chlorine, novel approaches and materials are required for effective disinfection of water. This study focuses on the development of a new sterilization material, Ag/NH2-MIL-125(Ti), which was designed to effectively inactivate Escherichia coli in water. The effectiveness of the as-designed material stems from the synergistic interactions between Ag nanoparticles (NPs) and photoactive metal–organic frameworks (MOFs). In this complex material, the MOFs play a critical role in dispersing and isolating the Ag NPs, thus preventing undesirable aggregation during bacterial inactivation. Simultaneously, Ag NPs enhance the photocatalytic performance of the MOFs. Sterilization experiments demonstrate the remarkable rapid E. coli inactivation performance of Ag/NH2-MIL-125(Ti) under illuminated and nonilluminated conditions. Within 25 min of visible light exposure, the as-prepared material achieves a >7-log E. coli reduction. In addition, Ag/NH2-MIL-125(Ti) efficiently decomposes acetic acid, which is the main DBP precursor, under visible light irradiation. Mechanistic investigations revealed that •O2 – and h+ were the primary active substances responsible for the inactivation of E. coli and the decomposition of acetic acid, respectively.

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Section: Effect Of the Coexisting Dbp Precursors On Bacterial Inactiv...mentioning

confidence: 85%

Ag Nanoparticle and Ti–MOF Cooperativity for Efficient Inactivation of E. coli in Water

Sun,

Pan,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…However, research and commercial application were focused mainly on chemical impurities of significant contribution in terms of elimination of pathogenic microorganisms (since antibiotics are becoming less effective due to antimicrobial resistance). Thus, in addition to the researches focused on antimicrobial nanomaterials to inhibit bacterial growth and destroy the cells, many photocatalytic disinfection studies have been performed involving bacteria, fungi, algae and viruses [63,64,[103][104][105][106][107][108][109][110][111][112][113][114][115][116][117]. Numerous experimental and review papers have been published.…”

Section: Resistance Of Persistent Organic Pollutants and Pathogenic M...mentioning

confidence: 99%

Perspectives for Photocatalytic Decomposition of Environmental Pollutants and Pathogens on Photoactive Particles of Soil Minerals

Sosnowska,

Hęclik,

Kisała

et al. 2024

Preprint

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The literature shows that both in laboratory and in industrial conditions, photocatalytic oxidation method copes quite well with the degradation of the most organic substances, including environmental toxins and molecular components of pathogenic microorganisms. However, the effective utilization of photocatalytic processes for environmental decontamination and disinfection require significant technological advancement both in the area of semiconductor material synthesis and its application. Here we focused on the presence and ‘photocatalytic capability‘ of photocatalysts among soil minerals, and their potential contribution to the environmental decontamination in vitro and in vivo. (The issue is sketched from the perspective of chemists and environmental scientist.) Reactions caused by sunlight on the soil surface are involved in its normal redox activity. It appears that some of them may take part in the soil decontamination. However, their importance for decontamination in vivo cannot be overstated due to diversity of soils on the Earth caused by the environmental conditions, such as climate, parent material, relief, vegetation etc. The solar-light induced reactions are just a part of extremely complicated processes dependent on a plethora of environmental determinates. Such multiplicity of affecting factors, which we tried to sketch from the perspective of chemists and environmental scientist, makes us rather sceptical about the effectiveness of the photocatalytic processes in vivo. On the other hand, there is a huge potential of the soils as the alternative source of useful photocatalytic materials of unique properties

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“…Enhances photocatalyst recovery, interaction of catalyst with pollutant, reduces leaching, improves catalyst stability and exciton pair separation May compete with catalysts for light absorption and reduce efficiency and do not add any value in the oxidation and reduction properties of semiconductors Schottky junction 20 Involves the use of metal and a semiconductor in contact Efficient charge separation as electrons accumulate on the metal Reduces reduction potential of the system Plasmon resonance materials (PRM) 21 Uses plasmonic noble metals to form junctions with semiconductors Increased light absorption due to plasmonic effect and efficient charge separation…”

Section: Limitationsmentioning

confidence: 99%

Understanding the Principles and Applications of Dual Z-Scheme Heterojunctions: How Far Can We Go?

Malefane

Mafa

Managa

et al. 2023

J. Phys. Chem. Lett.

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In the past seven years, dual Z-scheme heterojunctions evolved as favorable approaches for enhanced charge carrier separation through direct or indirect charge transfer transportation mechanisms. The dynamics of the charge transfer is the major strategy for understanding their photoactivity and stability through the formation of distinctive redox centers. The understanding of currently recognized principles for successful fabrication and classification in different energy and pollution remediation strategies is discussed, and a universal charge transfer-type-based classification of dual Z-schemes that can be adopted for Z-scheme and S-scheme heterojunctions is proposed. Methods used for determining the charge transfer as proof of dual Z-scheme existence are outlined. Most importantly, a new macroscopic N-scheme and a triple Z-scheme that can also be adopted as triple S-scheme heterostructures composed of four semiconductors are proposed for generating both oxidatively and reductively empowered systems. The proposed systems are expected to possess properties that enable them to harvest solar light to drive important chemical reactions for different applications.

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Bi-based photocatalysts for bacterial inactivation in water: Inactivation mechanisms, challenges, and strategies to improve the photocatalytic activity

Cited by 57 publications

References 208 publications

Ag Nanoparticle and Ti–MOF Cooperativity for Efficient Inactivation of E. coli in Water

Ag Nanoparticle and Ti–MOF Cooperativity for Efficient Inactivation of E. coli in Water

Perspectives for Photocatalytic Decomposition of Environmental Pollutants and Pathogens on Photoactive Particles of Soil Minerals

Understanding the Principles and Applications of Dual Z-Scheme Heterojunctions: How Far Can We Go?

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