Photoinduced degradation of organic dye over LiBiO3 under illumination of white fluorescent light

We report dye-degradation effects of a semiconductor LiBiO3 revealed under illumination of a conventionally used white fluorescent light. Optical absorbance spectra of LiBiO3 were broadened so smoothly, with the absorption edge penetrated to around 730 nm, that the material was able to absorb a wide range of visible light. Results showed that solution of a standard dye, methylene blue, was degraded completely after 4 h illumination. Furthermore, the value of total organic carbon decreased 70% in the decolorized solution, suggesting that the molecular form of the original methylene blue was mineralized effectively to nonorganic fragments by the photoinduced oxidization effect. Moreover, the wavelength dependence of apparent photonic efficiency was evaluated using a standard Xe lamp coupled with monochromatic filters. These results were interpreted from the viewpoint of this material’s electronic structure.

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Phylogenetically diverse bacteria isolated from tattoo inks, an azo dye-rich environment, decoloize a wide range of azo dyes

10.21203/rs.3.rs-540195/v1 ◽

2021 ◽

Author(s):

Seong Won Nho ◽

Xue Wen Cui ◽

Ohgew Kweon ◽

Jinshan Jin ◽

Huizhong Chen ◽

...

Keyword(s):

High Throughput ◽

Azo Dyes ◽

Azo Dye ◽

Dye Degradation ◽

Methyl Red ◽

Diverse Range ◽

Optical Absorbance ◽

Wide Range ◽

Systematic Understanding ◽

Tattoo Inks

Abstract Purpose: There has been an interest in the microbial azo dye degradation as an optional method for the treatment of azo dye-containing wastes. Tattoo ink is an extremely unique azo dye-rich environment, which never been explored in terms of microorganisms capable of degrading azo dyes. Previously, we isolated 81 phylogenetically diverse bacteria, belonging to 20 genera and 49 species, contaminated in tattoo inks. In this study, we investigated if these bacteria, which can survive in the azo dye-rich environment, have an ability to degrade azo dyes. Methods: We conducted a two-step azo dye degradation (or decolorization) assay. In step 1, a high-throughput degradability assay was done for 81 bacterial isolates using Methyl Red and Oragne II. In step 2, a further degradation assay was done for 10 selected bacteria with a representative of 11 azo dyes, including 3 commercial tattoo ink azo dyes. Degradation of azo dyes were calculated from measuring optical absorbance of souble dyes at specific wavelenths. Results: The initial high-throughput azo dye assay (step 1) showed that 79 isolates had a complete or partial degradation of azo dyes; >90% of Methyl Red and Orange II were degraded within 24 h, by 74 and 20 isolates, respectively. A further evaluation of azo dye degradability for 10 selected isolates in step 2 showed that the isolates, belonging to Bacillus , Brevibacillus , Paenibacillus , and Pseudomonas , exhibited an excellent decolorization ability for a wide range of azo dyes. Conclusions: This study showed that phylogenetically diverse bacteria, isolated from azo dye-rich tattoo inks, is able to degrade a diverse range of azo dyes, including 3 azo dyes used in commercial tattoo inks. Some of the strains would be good candidates for future studies to provide a systematic understanding of azo dye degradation mechanisms

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Controlled synthesis of CuS caved superstructures and their application to the catalysis of organic dye degradation in the absence of light

CrystEngComm ◽

10.1039/c4ce02120g ◽

2015 ◽

Vol 17 (6) ◽

pp. 1374-1380 ◽

Cited By ~ 49

Author(s):

Qun Wei Shu ◽

Jing Lan ◽

Ming Xuan Gao ◽

Jian Wang ◽

Cheng Zhi Huang

Keyword(s):

Methylene Blue ◽

Catalytic Properties ◽

Dye Degradation ◽

Organic Dye ◽

Controlled Synthesis ◽

One Pot ◽

Organic Dye Degradation

CuS caved superstructures with a variety of sizes and regular shapes were synthesized by an innovative one-pot method, which showed excellent catalytic properties evaluated by degradation of methylene blue (MB) without light.

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Hydrogen-Free Diamond Like Carbon Films with Embedded Cu Nanoparticles: Structure, Composition and Reverse Saturable Absorption Effect

Materials ◽

10.3390/ma13030760 ◽

2020 ◽

Vol 13 (3) ◽

pp. 760

Author(s):

Meškinis ◽

Vasiliauskas ◽

Viskontas ◽

Andrulevičius ◽

Guobienė ◽

...

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Carbon Films ◽

Saturable Absorption ◽

Reverse Saturable Absorption ◽

Diamond Like Carbon ◽

Optical Absorbance ◽

Wide Range ◽

Absorbance Spectra

In the present research, hydrogen-free diamond like carbon films with embedded copper nanoparticles (DLC:Cu) were grown by simultaneous DC magnetron sputtering of the graphite and copper targets. X-ray photoelectron spectroscopy was used to define the composition of the samples. Atomic force microscopy studies of diamond, like carbon films containing different amount of copper, revealed wide range of the surface morphologies as well as sizes and shapes of the embedded copper nanoclusters. Raman scattering spectra of all the DLC:Cu films investigated were typical for diamond-like carbon (including samples containing more than 60 at.% of copper). sp3/sp2 carbon bond ratio in the films decreased with the increase of the Cu amount in the films. According to the optical absorbance measurements, the surface plasmon resonance related absorption peak of DLC:Cu films was only detected in the films containing 28.45 at.% Cu. For the diamond like carbon films containing more than 40 at.% Cu, a further increase of Cu amount in the nanocomposite resulted in minor changes of the absorbance spectra. Some correlation between the changes of the samples surface morphology as well as phase structure and optical absorbance spectra of the films was found. In all cases, reverse-saturable absorption of the DLC:Cu films was observed. For some DLC:Cu films damage of the sample occurred at higher light fluences that can be related to the heating that is caused by the surface plasmon resonance effect.

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Botanically Templated Monolithic Macrostructured Zinc Oxide Materials for Photocatalysis

Inorganics ◽

10.3390/inorganics6040103 ◽

2018 ◽

Vol 6 (4) ◽

pp. 103

Author(s):

Nathan Black ◽

David Ciota ◽

Edward Gillan

Keyword(s):

Methylene Blue ◽

Zinc Oxide ◽

Diffuse Reflectance Spectroscopy ◽

Dye Degradation ◽

Blue Dye ◽

Oxide Materials ◽

Methylene Blue Dye ◽

X Ray ◽

Zinc Oxides ◽

Wide Range

With an increased focus on light energy to facilitate catalytic processes, photocatalysts have been intensively studied for a wide range of energy and environmental applications. In this report, we describe the use of chemically dehydrated leaves as sacrificial foam-like templates for the growth of monolithic macrostructured semiconducting zinc oxide and nickel or cobalt doped zinc oxide materials. The composition and structure of these templated zinc oxides were characterized using X-ray powder diffraction, scanning electron microscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy. Optical properties were examined using solid-state UV–vis diffuse reflectance spectroscopy. The metal-doped ZnO materials have enhanced visible absorption and lower band gaps as compared to ZnO. The botanically templated ZnO materials retain the macroscopic cellular form of the leaf template with fused nanoparticle walls. Their UV photocatalytic oxidative abilities were investigated using methylene blue dye degradation in air. The leaf templated zinc oxides degrade ~85% of methylene blue dye with 30 min of UV illumination. Nickel and cobalt doped zinc oxides showed varying degrees of decreased UV and visible light photocatalytic activity, possibly due to metal-mediated charge recombination. The mild chemical dehydration process here allows complex soft botanical structures to be easily utilized for templating materials.

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Phylogenetically diverse bacteria isolated from tattoo inks, an azo dye-rich environment, decolorize a wide range of azo dyes

Annals of Microbiology ◽

10.1186/s13213-021-01648-2 ◽

2021 ◽

Vol 71 (1) ◽

Author(s):

Seong Won Nho ◽

Xuewen Cui ◽

Ohgew Kweon ◽

Jinshan Jin ◽

Huizhong Chen ◽

...

Keyword(s):

High Throughput ◽

Azo Dyes ◽

Azo Dye ◽

Dye Degradation ◽

Orange Ii ◽

Methyl Red ◽

Diverse Range ◽

Optical Absorbance ◽

Wide Range ◽

Tattoo Inks

Abstract Purpose There has been an interest in the microbial azo dye degradation as an optional method for the treatment of azo dye-containing wastes. Tattoo ink is an extremely unique azo dye-rich environment, which have never been explored in terms of microorganisms capable of degrading azo dyes. Previously, we isolated 81 phylogenetically diverse bacteria, belonging to 18 genera and 52 species, contaminated in tattoo inks. In this study, we investigated if these bacteria, which can survive in the azo dye-rich environment, have an ability to degrade azo dyes. Methods We conducted a two-step azo dye degradation (or decolorization) assay. In step 1, a high-throughput degradability assay was done for 79 bacterial isolates using Methyl Red and Orange II. In step 2, a further degradation assay was done for 10 selected bacteria with a representative of 11 azo dyes, including 3 commercial tattoo ink azo dyes. Degradation of azo dyes were calculated from measuring optical absorbance of soluble dyes at specific wavelengths. Results The initial high-throughput azo dye assay (step 1) showed that 79 isolates had a complete or partial degradation of azo dyes; > 90% of Methyl Red and Orange II were degraded within 24 h, by 74 and 20 isolates, respectively. A further evaluation of azo dye degradability for 10 selected isolates in step 2 showed that the isolates, belonging to Bacillus, Brevibacillus, Paenibacillus, and Pseudomonas, exhibited an excellent decolorization ability for a wide range of azo dyes. Conclusions This study showed that phylogenetically diverse bacteria, isolated from azo dye-rich tattoo inks, is able to degrade a diverse range of azo dyes, including 3 azo dyes used in commercial tattoo inks. Some of the strains would be good candidates for future studies to provide a systematic understanding of azo dye degradation mechanisms.

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Review on Methylene Blue: Its Properties, Uses, Toxicity and Photodegradation

Water ◽

10.3390/w14020242 ◽

2022 ◽

Vol 14 (2) ◽

pp. 242

Author(s):

Idrees Khan ◽

Khalid Saeed ◽

Ivar Zekker ◽

Baoliang Zhang ◽

Abdulmajeed H. Hendi ◽

...

Keyword(s):

Methylene Blue ◽

Advanced Oxidation Process ◽

Dye Degradation ◽

Environmental Safety ◽

Research Area ◽

Critical Parameters ◽

Human Beings ◽

Efficient Technology ◽

Photodegradation Rate ◽

Wide Range

The unavailability of clean drinking water is one of the significant health issues in modern times. Industrial dyes are one of the dominant chemicals that make water unfit for drinking. Among these dyes, methylene blue (MB) is toxic, carcinogenic, and non-biodegradable and can cause a severe threat to human health and environmental safety. It is usually released in natural water sources, which becomes a health threat to human beings and living organisms. Hence, there is a need to develop an environmentally friendly, efficient technology for removing MB from wastewater. Photodegradation is an advanced oxidation process widely used for MB removal. It has the advantages of complete mineralization of dye into simple and nontoxic species with the potential to decrease the processing cost. This review provides a tutorial basis for the readers working in the dye degradation research area. We not only covered the basic principles of the process but also provided a wide range of previously published work on advanced photocatalytic systems (single-component and multi-component photocatalysts). Our study has focused on critical parameters that can affect the photodegradation rate of MB, such as photocatalyst type and loading, irradiation reaction time, pH of reaction media, initial concentration of dye, radical scavengers and oxidising agents. The photodegradation mechanism, reaction pathways, intermediate products, and final products of MB are also summarized. An overview of the future perspectives to utilize MB at an industrial scale is also provided. This paper identifies strategies for the development of effective MB photodegradation systems.

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Photocatalytic Remediation of Methylene Blue and Antibacterial Activity Study Using Schiff Base - Cu Complexes

10.21203/rs.3.rs-1030605/v1 ◽

2021 ◽

Author(s):

Fathima Fasna P H ◽

Sreesha Sasi ◽

Bindu Sharmila T K ◽

Julie Chandra C S ◽

Jolly V Antony ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Degradation ◽

Organic Dyes ◽

Dye Degradation ◽

Low Cost ◽

Organic Dye ◽

Effluent Treatment ◽

Diffusion Method ◽

Antibacterial Screening ◽

Organic Dye Degradation

Abstract Photocatalytic degradation of organic dyes under visible light and ultraviolet radiation is an efficient strategy for effluent treatment. This work describes the design of novel Cu(II) complexes using the ligand N'-(3-hydroxy-4-methoxybenzylidene)nicotinohydrazide and their application in the photocatalytic degradation of the organic dye, methylene blue (MB). The photocatalytic degradation of MB follows pseudo first-order kinetics with high correlation coefficient values (R2> 0.95), making them useful as simple and low-cost organic dye degradation agents. The antibacterial screening studies of the ligand and the Cu(II) complexes by disc diffusion method show the systems to exhibit activity against Escherichia coli (gram negative) and Bacillus circulans (gram positive).

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In-situ development of metal organic frameworks assisted ZnMgAl layered triple hydroxide 2D/2D hybrid as an efficient photocatalyst for organic dye degradation

Chemosphere ◽

10.1016/j.chemosphere.2020.128616 ◽

2020 ◽

pp. 128616 ◽

Cited By ~ 1

Author(s):

K. Bhuvaneswari ◽

G. Palanisamy ◽

T. Pazhanivel ◽

T. Maiyalagan ◽

P. Shanmugam ◽

...

Keyword(s):

Dye Degradation ◽

Metal Organic Frameworks ◽

Organic Dye ◽

Metal Organic ◽

Organic Dye Degradation

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Wide range and highly linear signal processed systematic humidity sensor array using Methylene Blue and Graphene composite

Scientific Reports ◽

10.1038/s41598-021-95977-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Muhammad Umair Khan ◽

Gul Hassan ◽

Rayyan Ali Shaukat ◽

Qazi Muhammad Saqib ◽

Mahesh Y. Chougale ◽

...

Keyword(s):

Methylene Blue ◽

Linear Combination ◽

Linear Function ◽

Humidity Sensor ◽

Sensor Array ◽

Combination Method ◽

Humidity Sensing ◽

Sensing Applications ◽

Wide Range ◽

Graphene Flakes

AbstractThis paper proposes a signal processed systematic 3 × 3 humidity sensor array with all range and highly linear humidity response based on different particles size composite inks and different interspaces of interdigital electrodes (IDEs). The fabricated sensors are patterned through a commercial inkjet printer and the composite of Methylene Blue and Graphene with three different particle sizes of bulk Graphene Flakes (BGF), Graphene Flakes (GF), and Graphene Quantum Dots (GQD), which are employed as an active layer using spin coating technique on three types of IDEs with different interspaces of 300, 200, and 100 µm. All range linear function (0–100% RH) is achieved by applying the linear combination method of nine sensors in the signal processing field, where weights for linear combination are required, which are estimated by the least square solution. The humidity sensing array shows a fast response time (Tres) of 0.2 s and recovery time (Trec) of 0.4 s. From the results, the proposed humidity sensor array opens a new gateway for a wide range of humidity sensing applications with a linear function.

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