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An efficient CuZr-based metallic glasses electrode material for electrocatalytic degradation of azo dyes

Journal of Environmental Sciences 2024年第2期136卷 537-546页

作者： Zhiwang Deng Bowen Zhao Songtao Li Zhengkun Li Shiming Zhang Kewei Zhang Zhengwang Zhu Taiyuan University of Science and Technology School of materials science and engineeringTaiyuan 030024China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Chinese Academy of Sciences Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Qingdao Yunlu Advanced Materials Technology Co. Ltd.Qingdao 266232China

Metallic glasses have received a lot of attention on wastewater treatment due to their unique atomic structure,and the use of metallic glasses as electrodes has produced unexpected electrocatalytic degradation effects for many pollutants through combining with electrochemical technology.However,it still is a formidable challenge to find a metallic glass electrode material with both efficient and clean for the catalytic degradation of pollutants.In this work,the Cu_(55)Zr_(45)metallic glassy ribbons are used as an electrode to degrade azo dyes and show the excellent degradation effect,which can reach 95.6%within 40 min.In the degradation process,almost no additives are produced and Cu_(55)Zr_(45)metallic glassy ribbons have excellent effects under different pH conditions.Meanwhile,it exhibits good stability for degradation efficiency during the 8 cycle degradation tests of the amorphous alloy electrode.When the copper nanoparticles are exposed on the surface of the ribbons,the oxidized copper obtained synergistically produce activated radicals is the primary degradation mechanism,where the auxiliary degradation mechanisms include electron transfer and the promotion of active chlorine.This research develops a new type of electrode material for wastewater treatment,and the economy and high efficiency of Cu55Zr45metallic glass endow it the expandable functional applications.

关键词： Metallic glasses azo dyes Electrocatalytic Degradation Oxidized copper

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Bioremediation of Textile azo dyes Amido Black 10B, Reactive Black 5, Reactive Blue 160 by Lentinus squarrosulus AF5 and Assessment of Toxicity of the Degraded Metabolites

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Advances in Microbiology 2024年第2期14卷 137-161页

作者： Anshu Mathur Chandrachur Ghosh Partha Roy Ramasare Prasad Rajesh Pratap Singh Department of Biosciences and Bioengineering Indian Institute of Technology Roorkee Roorkee India

Bioremediation is an eco-compatible and economical approach to counter textile dye menace. The isolated Lentinus squarrosulus AF5 was assessed for decolourization of textile azo dyes, and had shown ~93%, 88% and 70% decolorization of Reactive blue 160 (RB160), Reactive black 5 (RB5) and Amido black 10B (AB10B) respectively. Further analysis using UV-vis, HPLC, and FTIR, 1H NMR had shown the degradation of the dyes. Toxicity analysis of the metabolites was performed using seed germination and plant growth on two agriculturally important plants Guar (Cyamopsis tetragonoloba) and wheat (Triticum aestivum) as well as cytotoxicity analysis using the human keratinocyte cell line (HaCaT). The dye mix appeared inhibitory for seed germination (20% - 40%), whereas metabolites were non-inhibitory for germination. Treatment of HaCaT cells with of dye mix and metabolites led into 45% and ~100% of cell viability of HaCaT cells respectively. Therefore, metabolites following degradation of the dye mix were observed to be non-toxic.

关键词： Lentinus squarrosulus AF5 azo dyes FTIR 1H NMR Catabolism Cytotoxicity

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Progress and prospects of Mg-based amorphous alloys in azo dye wastewater treatment

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Journal of Magnesium and Alloys 2024年第3期12卷 873-889页

作者： Yanan Chen Fengchun Chen Liang Li Chen Su Bo Song Hongju Zhang Shengfeng Guo Fusheng Pan School of Materials and Energy Southwest UniversityChongqing 400715China Analytical and Testing Center Southwest UniversityChongqing 400715China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

Mg-based amorphous alloys exhibit efficient catalytic performance and excellent biocompatibility with a promising application probability,specifically in the field of azo dye wastewater degradation.However,the problems like difficulty in preparation and poor cycling stability need to be solved.At present,Mg-based amorphous alloys applied in wastewater degradation are available in powder and ribbon.The amorphous alloy powder fabricated by ball milling has a high specific surface area,and its reactivity is thousands of times better than that of gas atomized alloy powder.But the development is limited due to the high energy consumption,difficult and costly process of powder recycling.The single roller melt-spinning method is a new manufacturing process of amorphous alloy ribbon.Compared to amorphous powder,the specific surface area of amorphous ribbon is relatively lower,therefore,it is necessary to carry out surface modification to enhance it.Dealloying is a way that can form a pore structure on the surface of the amorphous alloys,increasing the specific surface area and providing more reactive sites,which all contribute to the catalytic performance.Exploring the optimal conditions for Mg-based amorphous alloys in wastewater degradation by adjusting amorphous alloy composition,choosing suitable method to preparation and surface modification,reducing cost,expanding the pH range will advance the steps to put Mg-based amorphous alloys in industrial environments into practice.

关键词： Mg-based amorphous alloys azo dyes Dealloying Surface modification Wastewater degradation.

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Biodegradation of azo dyes by genetically engineered azoreductase

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Journal of Environmental Sciences 2005年第4期17卷 545-550页

作者： WANGJing YANBin ZHOUJi-ti BAOYong-ming LUHong YUANXiao-dong SchoolofEnvironmentalandBiologicalScienceandTechnology DalianUniversityofTechnologyDalian116023

A azoreductase gene with 537 bp was obtained by PCR amplification from Rhodobacter sphaeroides AS1 1737 The enzyme, with a molecular weight of 18 7 kD, was efficiently expressed in Escherichia coli and its biodegradation characteristics for azo dyes were investigated. Furthermore, the reaction kinetics and mechanism of azo dyes catalyzed by the genetically engineered azoreductase were studied in detail. The presence of a hydrazo-intermediate was identified, which provided a convincing evidence for the assumption that azo dyes were degraded via an incomplete reduction stage.

关键词： genetically engineered microorganisms azoreductase biodegradation azo dyes

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Bio-synthesized palladium nanoparticles using alginate for catalytic degradation of azo-dyes

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1334-1343页

作者： Yi Xiong Liping Huang Sakil Mahmud Feng Yang Huihong Liu College of Chemistry and Chemical Engineering Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&FinishingWuhan Textile UniversityWuhan 430200China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

Palladium nanoparticles(PdNPs)were synthesized in a green way using sodium alginate functioning as both reductant and stabilizer.The formation of as-synthesized Pd NPs was supervised by Ultraviolet–visible(UV–Vis)spectroscopy and confirmed by the surface plasmon resonance(SPR)band.The effect of several synthesis factors such as precursor ratio,solution p H,reaction time,and temperature were investigated by the factorial design of experiments in order to optimize the experimental conditions.The optimal synthesis parameters were achieved by heating 1.0 ml of 1.0%sodium alginate(SA),3.0 ml of 10-2 mol·L-1 H2PdCl4 at 80°C for a period of 30 min in a neutral reaction medium(pH=6).High-resolution transmission electron microscope(HRTEM),energy dispersive X-ray(EDX)spectroscopy,selected area electron diffraction(SAED)pattern,X-ray powder diffraction(XRD),and dynamic light scattering(DLS)were used to confirm the uniform spherical shapes and high crystallinity of Pd NPs with average particle size of(2.12±1.42)nm.The SEM images show the distribution of Pd NPs presented among the SA.FTIR spectra indicate that SA is a good capping agent to stabilize Pd NPs for a long time.The catalytic degradation of model azo-dyes such as mono-azo(Cibacron Yellow FN–2R)and di-azo(Cibacron Deep Red S–B)were confirmed the catalytic activity of Pd NPs.The Pd NPs can accelerate the degradation rate by more than 80 and 10 times respectively as confirmed by kinetics constant(k)values.

关键词： Palladium nanoparticles sodium alginate Green synthesis azo dyes Catalysis

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Optical and Thermal Properties of Nickel-azo dyes for Digital Versatile Disc-Recordable

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Chinese Physics Letters 2003年第9期20卷 1517-1519页

作者：魏斌吴谊群顾冬红千福熹 ShanghaiInstituteofOpticsandFineMechanics ChineseAcademyofSciencesPOBox800-211Shanghai201800

We investigate the absorption spectra, optical constants and thermal decomposition as well as red-light (650nm) static recording properties of three novel nickel-azo dye films based on 4-methylthiazole, benzothiazole and 6-methylbenzothiazole. Particularly, we obtain the nickel-azo complex film based on 4-methylthiazole, peaking at 562nm and 613nm, with higher refractive index (n = 2.46) and lower extinction coefficient (k = 0.18) at the wavelength 650nm and a sharp threshold of thermal decomposition at 330°C. The results of the static optical recording test of this dye film indicate that high reflectivity contrast of 51% can be observed at a laser writing power of 5.9mW and pulse width of 350ns. These results imply that the nickel-azo complex based on 4-methylthiazole is a promising candidate for a recording medium of digital versatile disc-recordable.

关键词： azo dyes

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Comparison of decolorization of reactive azo dyes by microorganisms isolated from various sources

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Journal of Environmental Sciences 2003年第5期15卷 628-632页

作者： S.Padamavathy S.Sandhya K.Swaminathan Y.V.Subrahmanyam S.N.Kaul NationalEnvironmentalEngineeringResearchInstitute NationalEnvironmentalEngineeringResearchInstituteNationalEnvironmentalEngineeringResearchInstituteNationalEnvironmentalEngineeringResearchInstituteNationalEnvironmentalEngineeringResearchInstitute CSIRComplexChennaiIndiaCSIRComplexChennaiIndiaCSIRComplexChennaiIndiaCSIRComplexChennaiIndiaCSIRComplexChennaiIndia

azo dyes are among the oldest man made chemicals and they are still widely used in the textile, printing and the food industries. About 10%-15% of the total dyes used in the industry is released into the environment during the manufacturing and usage. Some dyes and some of their N substituted aromatic bio transformation products are toxic and/or carcinogenic and therefore these dyes are considered to be environmental pollutants and health hazards. These azo dyes are degraded by physico chemical and biological methods. Of these, biological methods are considered to be the most economical and efficient. In this work, attempts were made to degrade these dyes aerobically. The organisms which were efficient in degrading the following azo dyes Red RB, Remazol Red, Remazol Blue, Remazol Violet, Remazol Yellow, Golden Yellow, Remazol Orange, Remazol Black were isolated from three different sources viz., wastewater treatment plant, paper mill effluent treatment plant and tannery wastewater treatment plant. The efficiency of azo dye degradation by mixed cultures from each source was analyzed. It was found that mixed cultures from tannery treatment plant worked efficiently in decolorizing Remazol Red, Remazol Orange, Remazol Blue and Remazol Violet, while mixed cultures from the paper mill effluent worked efficiently in decolorizing Red RB, Golden Yellow and Remazol Yellow. The mixed cultures from wastewater treatment plant efficiently decolorized Remazol Black.

关键词： azo dyes decolorization aerobic transformation

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Visible and near-infrared light activated azo dyes

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Chinese Chemical Letters 2021年第8期32卷 2359-2368页

作者： Huijuan Chen Weijie Chen Yan Lin Yuan Xie Sheng Hua Liu Jun Yin Key Laboratory of Pesticide and Chemical Biology Ministry of EducationHubei International Scientific and Technological Cooperation Base of Pesticide and Green SynthesisInternational Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules Hubei UniversityWuhan 430062China Guangdong Provincial Key Laboratory of Radioactive and Rare Resource Utilization Shaoguan 512026China Department of Pharmacy Jiangxi University of Traditional Chinese MedicineNanchang 330013China

The photoisomerization properties of azo derivatives have been widely used in the fields of materials and biology.One serious restriction to the development of functional azo-based materials is the necessity to trigger switching by UV light,which damage the corresponding surfaces and penetrate only partially through the matter.Therefore,developing the visible and near-infrared light activated azo switches can solve this problem.This review provides a summary of molecular design strategies for driving the isomerization of azo derivatives with visible light and near-infrared light:(1) smart design directly excited by visible light,(2) the addition of upconversion nanoparticles,(3) the employment of twophoton absorption,(4) indirect excitation in combination with metal sensitizer.

关键词： Photochromism azo dyes Visible light activation Near-infrared light activation

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Synthesis of 6-chloro and 6-fluoro-4-hydroxyl-2-quinolone and their azo disperse dyes

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Chinese Chemical Letters 2010年第5期21卷 542-546页

作者： Enayat O'llah Moradi-e-Rufchahi Department of Chemistry Faculty of ScienceIslamic Azad UniversityLahijan BranchLahijanIran

In this study,6-chloro-4-hydroxy-2-quinolone and 6-flouro-4-hydroxy-2-quinolone were synthesized from corresponding dianilides.These compounds were coupled with some diazotized aromatic amines to give the corresponding azo disperse dyes.The structures of the quinolone derivatives and new azo dyes were confirmed by UV-vis,FT-IR,;H NMR and elemental analysis.

关键词： azo dyes Hydroxy quinolone Heterocyclic amines Solvatochromism Polyphosphoric acid Heterocyclic dyes

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Novel azo dyes derived from 8-methyl-4-hydroxyl-2-quinolone:Synthesis,UV-vis studies and biological activity

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Chinese Chemical Letters 2013年第5期24卷 425-428页

作者： E.O.Moradi Rufchahi H.Pouramir M.R.Yazdanbakhsh H.Yousefi M.Bagheri M.Rassa Department of Chemistry Faculty of ScienceLahijan BranchIslamic Azad University Department of Chemistry Faculty of SciencesUniversity of Guilan Department of Biology Faculty of SciencesUniversity of Guilan

In this study,N,N＇-di-（2-methylphenyl）malonamide was synthesized and reacted with polyphosphoric acid to afford 8-methyl-4-hydroxyl-2-quinolone.Eight novel azo disperse dyes were then synthesized by linking diazotized p-substituted aniline derivatives with 8-methyl-4-hydroxyl-2-quinolone.The solvatochromism of these azo dyes in various solvents was evaluated.All the compounds were then evaluated for their antibacterial activity against four bacteria,namely.Bacillus subtilis.Micrococcus luteus, Salmonella enterica,and Pseudomonas aeruginosa.The results showed that some of these compounds have high levels of antibacterial activity.

关键词： azo dyes Disperse dyes Hydroxyl quinolone Absorption spectrum Antibacterial studies

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