Post‐Illumination Photoconductivity Enables Extension of Photo‐Catalysis after Sunset

: The prevention and treatment of various infections caused by microbes through antibiotics are becoming less effective due to antimicrobial resistance. Researches are focused on antimicrobial nanomaterials to inhibit bacterial growth and destroy the cells, to replace conventional antibiotics. Recently, carbon dots (C-Dots) become attractive candidates for a wide range of applications, including the detection and treatment of pathogens. In addition to low toxicity, ease of synthesis and functionalization, and high biocompatibility, C-Dots show excellent optical properties such as multi-emission, high brightness, and photostability. C-Dots have shown great potential in various fields, such as biosensing, nanomedicine, photo-catalysis, and bioimaging. This review focuses on the origin and synthesis of various C-Dots with special emphasis on bacterial detection, the antibacterial effect of CDots, and their mechanism.

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Development of Nanomaterials as Photo Catalysts for Environmental Applications

Current Catalysis ◽

10.2174/2211544709999201123193710 ◽

2020 ◽

Vol 09 ◽

Author(s):

Ahmed M. Abu-Dief ◽

W. S. Mohamed

Keyword(s):

Water Purification ◽

Smart Materials ◽

Block Size ◽

Industrial Applications ◽

Vital Role ◽

High Catalytic Activity ◽

Chemical Contaminants ◽

Environmental Threats ◽

Photo Catalysis ◽

Materials Used

Abstract:: Sustainability environmental lack is a growing and pivotal mater due to the issues: such as disturbances associated with biodiversity pollution, and climate change. Pollutants are the major cause of these environmental threats in the atmosphere. In recently, the nano-based photocatalyst is at the forefront of the author's interest because of its promising potential as a green chemical-based compound, high catalytic activity, the suitable and controllable surface area for wastewater treatment. Semiconductor materials in nanosized scale have electronic and optical properties depend on its building block size, which plays a vital role in developing smart materials that are well efficient for simultaneously destroying harmful chemical contaminants from our environment. This makes these materials used in many possible industrial applications such as water purification. In this Review, we report the most significant results contributing to progress in the area of environmental hazardous pollutant detection and removal focused on water purification especially through photo-catalysis to give readers an overview of the present research trends. Moreover, we analyze previous studies to indicate key principles of photo-catalysis and provide guidelines that can be used to fabricate more efficient photocatalysts.

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Bi2O3 nano-flakes as a cost-effective antibacterial agent

Nanoscale Advances ◽

10.1039/d0na00910e ◽

2021 ◽

Author(s):

Luke D Geoffrion ◽

David Medina Cruz ◽

Matthew Kusper ◽

Sakr Elsaidi ◽

Fumiya Watanabe ◽

...

Keyword(s):

Bismuth Oxide ◽

Antibacterial Agent ◽

Chemical Properties ◽

Cost Effective ◽

Bismuth Compound ◽

Photo Catalysis ◽

Physico Chemical

Bismuth oxide is an important bismuth compound having applications in electronics, photo-catalysis and medicine. At the nanoscale, bismuth oxide experiences a variety of new physico-chemical properties because of its increased...

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Preparation and band gap shift of nano-structured metal oxides and their activity in disinfection of water using laser induced photo-catalysis

8th International Conference on High-capacity Optical Networks and Emerging Technologies ◽

10.1109/honet.2011.6149820 ◽

2011 ◽

Author(s):

M.A. Gondal ◽

M.A. Dastageer ◽

A. Khalil

Keyword(s):

Metal Oxides ◽

Band Gap ◽

Photo Catalysis

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Photocatalytic decontamination of pharmaceutical effluent in a double tube reactor by ZnO catalyst. Physico chemical characterization and optimization.

10.21203/rs.3.rs-162545/v1 ◽

2021 ◽

Author(s):

F. NAITALI ◽

H GHOUALEM

Keyword(s):

Flow Rate ◽

Catalyst Concentration ◽

Volume Flow Rate ◽

Oxygen Demand ◽

Chemical Characterization ◽

Volume Flow ◽

Optimal Conditions ◽

Photo Catalysis ◽

Tube Reactor ◽

Physico Chemical

Abstract This work focused on the study of the elimination of a non-steroidal anti-inflammatory drug (diclofenac) using heterogeneous photo catalysis as a treatment.The study investigated the effect of parameters (catalyst concentration, initial diclofenac concentration, ratio r r = . and volume flow) on the photocatalytic degradation of diclofenac. The analyses performed are pH, electrical conductivity, turbidity, surface tension, chemical oxygen demand, nitrite and diclofenac concentration.The study showed that: The heterogeneous photo catalytic degradation is influenced by :The concentration of the ZnO catalyst; The concentration of 1.5 g/L gives a better degradation in diclofenac with a percentage of elimination of 52%; The initial concentration of diclofenac; The concentration of 100 mg/L of diclofenac gives a better degradation with a percentage of elimination of 52%; The ratio r = ; The three ratios (1; 5; and 10%) give a total degradation after one hour of treatment; The volume flow rate of 25 mL/s gives a total degradation after one hour of treatment. Optimal conditions for heterogeneous photo-catalysis are : [ZnO] = 1.5 g/L, [diclofenac] = 100 mg/L, Volume flow rate = 25 mL/s For a volume flow rate of 20 mL/s, optimal conditions are met by adding H2O2.

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