Degradation Of Industrial Dyes Research Articles

Direct fabrication of metal-free graphene nanohairs/polyimide heterojunction for the highly efficient photocatalytic degradation of industrial dyes

A single-step three-dimensional graphene nanohairs/polyimide heterojunction (GPH) is fabricated using a CO2 laser-assisted method. An optimization process has been systematically carried out to obtain high-quality graphene nanohairs on polyimide. The obtained GPH was characterized by X-Ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy. Using the fabricated GPH as a photocatalyst, the photocatalytic degradation of three industrial dyes namely, methyl orange (MO), methylene blue (MB), and Rhodamine B (RhB), was studied under UV irradiation. The decolorization of the samples was studied by UV–vis absorbance spectrometer. Starting from 5 ppm dye solutions with GPH, the degradation efficiencies of 97 % for MO in 60 min, 98 % for RhB in 90 min, and 88 % for MB in 170 min, were achieved. Furthermore, the stability of GPH was evaluated and after five runs, the degradation efficiency of MO, RhB and MB is decreased to 85 %, 91 % and 75 % from 98 %, 97 %, and 88 %, respectively. The mechanism for the degradation of dyes using GPH was proposed. The simple and feasible fabrication of GPH with excellent photocatalytic dye degradation efficiency would create the new insight into the flexible heterostructures for degrading the industrial wastewater treatment process.

Fabrication of two-dimensional Zn/Cd-based metal-organic frameworks and their heterostructures as efficient photocatalysts for the degradation of industrial dyes

Fabrication of two-dimensional Zn/Cd-based metal-organic frameworks and their heterostructures as efficient photocatalysts for the degradation of industrial dyes

Immobilized laccase: an effective biocatalyst for industrial dye degradation from wastewater.

Environmental concerns due to the release of industrial wastewater contaminated with dyes are becoming more and more intense with the increasing industrialization. Decolorization of industrial effluents has become the top priority due to the continuous demand for color-free discharge into the receiving water bodies. Different dye removal techniques have been developed, among which biodegradation by laccase enzyme is competitive. Laccase, as a green catalyst, has a high catalytic activity, generates less toxic by-products, and has been extensively researched in the field of remediation of dyes. However, laccase's significant catalytic activity could only be achieved after an effective immobilization step. Immobilization helps strengthen and stabilize the protein structure of laccase, thus enhancing its functional properties. Additionally, the reusability of immobilized laccase makes it an attractive alternative to traditional dye degradation technologies and in the realistic applications of water treatment, compared with free laccase. This review has elucidated different methods and the carriers used to immobilize laccase. Furthermore, the role of immobilized laccase in dye remediation and the prospects have been discussed.

Co-precipitated vanadium oxide-doped carbon spheres and graphene oxide nanorods serve as antimicrobial and catalytic agents: In silico molecular docking study

Undoped V2O5 is characterized by a small surface area and rapid electron-hole recombination, thus rendering it ineffective as a catalytic and antimicrobial agent. In this study, co-precipitation was employed to synthesize vanadium oxide (V2O5) and carbon spheres (CS) followed by doping with specific concentrations (3 and 6 wt%) of graphene oxide (GO) to produce GO/CS-doped V2O5 nanorods (NRs). The enhancement in catalytic and antibacterial activity provided by GO/CS-doped V2O5 was utilized to treat wastewater more efficiently. XRD analysis validated the orthorhombic and tetragonal structure of the synthesized samples. The polycrystalline nature of V2O5 was shown by vibrant circular rings in selected area electron diffraction (SAED) micrographs. TEM analysis endorsed formation of NRs, whereas UV–vis, luminescence (PL) and fourier transform infrared spectroscopy (FTIR), probed the absorption and emission along with stretching and bending vibrations in V-O-V bond. The chemically synthesized NRs exhibited excellent catalytic activity (93.71%) against rhodamine B (RhB) dye in the vicinity of NaBH4. In addition, NRs were used to evaluate in-vitro antimicrobial efficiency of 3.75 mmfor Escherichia coli (E. coli) using inhibition zone measurement. Docking investigations of GO/CS-V2O5 NRs for FabH and FabI of E. coli suggested suppression of above-mentioned enzymes as a possible mechanism. These findings demonstrate that (3 and 6 wt%) GO/CS-V2O5 possessed ample potency for industrial dye degradation and antimicrobial activity.

High-efficient photocatalytic degradation of industrial dyes (MB, RhD, and MB/RhD) using Zn100−xSmxO nanoparticles

Dyes are commonly used in industry, but disposing of them after use is a serious issue as many toxic dyes end up in wastewater. Our paper aims to address this problem by utilizing Zn100−xSmxO (where x = 0, 2.5, 5, and 10) nanoparticles as a cost-effective and easily produced photocatalyst to break down common industrial dyes such as Methylene blue (MB), Rhodamine B (RhB), and a mixture of both. We characterized the nanoparticles using various techniques such as x-ray diffraction, Fourier-transform infrared spectroscopy, x-ray Photoelectron Spectroscopy, and Transmission electron microscope. Our analysis confirmed that the Zn100−xSmxO nanoparticles have a single hexagonal phase and a regular shape, with a size of 50 nm. We found that the doping ratio of our fabricated material affects its absorption and energy gap, with Eg decreasing from 2.95 to 2.78 eV as the doping ratio increased. We evaluated the photocatalytic activity of the nanoparticles for the three types of dyes and found that Zn95Sm5O had an efficiency of approximately 80%. Zn95Sm5O was also able to adsorb 68% RhB and 67% MB in the MB-RhB mixture solution. Furthermore, we determined that the degradation of both dyes followed a pseudo-first-order reaction process.

Fabrication of MnO2/g-C3N4 hetero-junction for hydrogen production and rhodamine B/methylene blue dye degradation

Over the past few decades, significant progress has been made in the area of clean and renewable energy resources to cope with the rapid diminish of fossil fuels. To suffice this purpose, photocataytic hydrogen production using heterojunctions is drawing a lot of attention. For this purpose a MnO2/g-C3N4 heterojunctions has been fabricated using hydrothermal method. The fabricated sample has been characterized by PXRD, SEM and EDX analysis. The XPS analysis reveals about the presence of Mn, C, N and O elements in the sample. The bandgap for MnO2/g-C3N4 narrowed to 1.75 eV, favouring the harvesting of visible-light. In the photocatalytic H2 evolution reaction (HER), MnO2/g-C3N4 heterojuctions exhibited promising results with 3855 μmol g−1 H2 production via Z-scheme mechanism, where e− produced in MnO2 are accumulated in the valance band of g-C3N4, increasing the lifetime of generated e− and h+. Fabricated MnO2/g-C3N4 heterojunctions have also been used for degradation of industrial dye viz. Rhodamine B (RhB) and Methyl orange (MO).

Photocatalytic degradation of Congo red dye using zinc oxide nanoparticles prepared using Carica papaya leaf extract

In this research, the photocatalytic degradation of Congo red (CR) dye was investigated using hexagonal wurtzite structured zinc (Zn) oxide nanoparticles (ZnO NPs: crystallite size of ∼21 nm and band gap energy of 2.88 eV) prepared through the reduction of a Zn salt using Carica (C.) papaya leaf extract. The Fourier transform infrared (FTIR) spectra revealed the presence of several organic moieties (supplied by the C. papaya leaf extract) on the ZnO surface. High-resolution transmission electron microscope (HRTEM) images showed non-agglomerated and multi-structured (e.g., spherical, semi-spherical, hexagonal, and rod-like) ZnO NPs. The BET analysis indicated the mesoporous structure of ZnO NPs with a high specific surface area of 34 m2/g. The ZnO NPs showed 99.9% degradation of CR dye (120 mg L−1) within 80 min under ultraviolet (UV) irradiation. The ZnO NPs exhibited excellent photocatalytic performance (e.g., quantum yield: 3.18 × 10−4Φ, kinetic reaction rate: 1.43 × 10+3 μmol g−1 h−1, space time yield: 3.18 × 10−5 molecules photon−1 mg−1, and figure-of-merit: 5.53 × 10−9 mol L J−1 g−1 h−1) with a minimum energy consumption of 3.26 × 1022 J mol−1 in comparison to other photocatalytic systems. The photocatalytic reaction pathways of CR dyes are addressed, along with a discussion on its degradation products based on gas chromatography-mass spectrometry (GC-MS) analysis. The overall results of this research indicate that C. papaya-mediated ZnO NPs can be used as an effective option for the degradation of industrial dyes.

Bactericidal Action and Industrial Dye Degradation of Graphene Oxide and Polyacrylic Acid-Doped SnO2 Quantum Dots: In Silico Molecular Docking Study.

The present work demonstrates the systematic incorporation of different concentrations of graphene oxide (GO) into a fixed amount of polyacrylic acid (PAA)-doped SnO2 quantum dots (QDs) through a co-precipitation approach. The research aimed to evaluate the catalytic and antibacterial actions of GO/PAA-SnO2 QDs. Moreover, optical properties, surface morphologies, crystal structures, elemental compositions, and d-spacings of prepared QDs were examined. X-ray diffraction patterns revealed the tetragonal configuration of SnO2, and the crystallinity of QDs was suppressed upon dopants verified by the SAED patterns. Electronic spectra identified the blue shift by incorporating GO and PAA led to a reduction in band gap energy. Fourier transform infrared spectra showed the existence of rotational and vibrational modes associated with the functional groups during the synthesis process. A drastic increase in the catalytic efficacy of QDs was observed in the neutral medium by including dopants, indicating that GO/PAA-SnO2 is a promising catalyst. GO/PAA-SnO2 showed strong bactericidal efficacy against Escherichia coli (E. coli) at higher GO concentrations. Molecular docking studies predicted the given nanocomposites, i.e., SnO2, PAA-SnO2, and GO/PAA-SnO2, as potential inhibitors of beta-lactamaseE.coli and DNA gyraseE.coli.

Detailed Analysis of Crystal Structure and Optical Properties of Green Synthesized Nanoparticles: Application for Photocatalyst Degradation of Methylene Blue

We report the green chemistry reduction approach method for the synthesis of Manganese Oxide nanoparticles (MnO NPs), Copper Oxide nanoparticles (CuO NPs) and Manganese-doped Copper Oxide nanoparticles (Mn-doped CuO Nps). Aqueous extract from the seeds was used as reducing and capping agents. The detailed crystal structure analysis was investigated; crystallite size, crystallinity, morphological index, x-ray density, bulk density, specific surface area, porosity, Lorentz factor, Lorentz polarization factor and other parameters were calculated. Simple EDX mapping reveals the presence of Mn, Cu, O and C. FTIR analysis was used to determine the bond length of a nanocomposite. In the visible area, nanoparticles have higher optical absorption, with bandgaps varying from 1.79 (MnO), 2.18 eV (CuO) and 1.72 eV (Mn-doped CuO). After 90 min, the photodegradation rate of Mn-doped CuO nanocatalysts was 93.73 % while using a smaller amount of catalyst (0.1 g) at pH 7. The pseudo-first-order MB photocatalytic decomposition kinetic model has a high correlation coefficient value (R2 > 0.95). It was found that Mn-doped CuO NPs have higher photocatalytic efficiency and can be used as potential photocatalysts for industrial dye degradation. HIGHLIGHTS Green synthesis of Mn, Cu, and Mn-doped Cu nanoparticles by Bambusa seeds extract Characterized via XRD (crystal structure), UV-Vis Diffuse Reflectance spectra (UV-DRS), FT-IR (bond length), and FESEM-EDS analysis Photocatalytic degradation of organic methylene blue dye using Mn-doped CuO nanoparticles GRAPHICAL ABSTRACT

Green Synthesis of Iron Oxide Nanoparticles Using Psidium guajava L. Leaves Extract for Degradation of Organic Dyes and Anti-microbial Applications

Among various metal and metal oxide nanoparticles, iron-oxide nanoparticles (IONPs) have been more widely used for the degradation of harmful organic dyes and the inhibition of microbial growth; on the other hand, it positively affects mammalian cells. Green synthesis of IONPs has piqued the interest of researchers because it improves stability and is an environmentally friendly method of avoiding the use of harmful chemicals as a reducing agent. In this study, IONPs were synthesized using Psidium guajava leaf extract, which was further applied for its industrial dye degradation and anti-microbial activities. UV–visible spectroscopy, FTIR, XRD, XPS, EDX, FE-SEM, HR-TEM, and Zeta potential analysis were used to characterize the synthesized nanoparticles. The synthesized IONPs managed to degrade methylene blue (MB) and methyl orange (MO) in the presence of H2O2. The degradation efficiency was 82.1% in 95 min and 53.9% in 205 min for MB and MO, respectively. Likewise, the synthesized IONPs showed good anti-bacterial activity with a ZOI of 13 mm for both Shigella sonnei and Staphylococcus aureus gram-positive bacteria. Similarly, they demonstrated good anti-fungal activity with ZOI of 15 mm and 13 mm for Candida tropicalis and Candidaalbicans, respectively. Thus, the IONPs can combat harmful organic dyes, and they can terminate the pathogenicity of several human pathogens.

Novel MAX phase/polyaniline nanocomposite for photocatalytic degradation of toxic industrial dye

• Novel MAX Phase/Polyaniline nanocomposites as a photocatalyst for the degradation of industrial dyes. • Facile and one pot synthesis of MAX phase/polyaniline nanocomposite. • Introduction of the MAX phase into the polymer matrix resulted in enhanced photocatalytic efficiency. • The development of cost-effective and highly efficient catalyst. Among various treatment methods photocatalysis is considered the most efficient method owing to the high efficiency and use of abundant sunlight. The use of photocatalysts not only removes harmful bacteria but also degrades toxic organic pollutants. From TiO 2 by Fujiyama and Honda (1972) as photocatalyst, the materials studies have been evolved, chemically, and morphologically modified for higher competency. It is known that the preparation of nanocomposites and hybrid materials leads to enhanced performance over pristine materials. Therefore, this paper reports preparation of MAX phase-polyaniline nanocomposite as an excellent photocatalyst for degradation of pollutant model dye, methyl orange (MO). The photocatalysts' performance was measured through the degradation of MO dye under solar light irradiation. It was found that the nanocomposites exhibits better performance than the pure polymer and MAX phase.

Biosynthesis of silver and gold nanoparticles using Sargassum horneri extract as catalyst for industrial dye degradation

This study focuses on the green synthesis of silver and gold nanoparticles using the marine algae extract, Sargassum horneri , as well as the degradation of organic dyes using biosynthesized nanoparticles as catalysts. The phytochemicals of the brown algae Sargassum horneri acted as reducing and capping agents for nanoparticle synthesis. Ultraviolet–visible absorption spectroscopy, dynamic light scattering, high-resolution transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectroscopy, X-ray powder diffraction, and Fourier transform infrared spectroscopy were used to characterize the biosynthesized nanoparticles. The green-synthesized SH-AgNPs and SH-AuNPs exhibited high catalytic activity for degradation of organic dyes, such as methylene blue, rhodamine B, and methyl orange. The reduction reactions of dyes are based on pseudo-first-order kinetics.

Potential of Piper betle@Co3O4 nanoparticles as high-performance photocatalysts for the removal of industrial dyes

In this study, cobalt oxide (Co3O4) NPs were bio-synthesized for photocatalytic application through the reduction of cobalt chloride hexahydrate using extract of Piper betle (e.g., polyphenols). The as-prepared Co3O4 NPs exhibited the face-centered cubic structure of Co3O4 with the crystallite sizes ranging from 20 to 30 nm with an energy band gap of 3.86 eV. FTIR spectra revealed that Piper betle extracts were present on the surface of the resulting Co3O4. HRTEM confirmed the dispersion of non-agglomerated uniformly spherical particles over a large area. The photocatalytic activity of the Co3O4 NPs was investigated for the degradation of the industrial dye, Eriochrome Black T (EBT). The degradation efficiency of EBT could exceed 94% within 80 min under UV light. The Piper [email protected]Co3O4 NPs recorded superior performance (quantum yield of 1.98 × 10−4 Φ and figure-of-merit of 1.59 × 10−9 mol L J−1 g−1 h−1) with a low energy requirement of 2.35 × 109 J mol−1. As such, the Piper betle@Co3O4 NPs are recognized as a high-efficiency photocatalyst for efficient degradation of industrial dyes.

Plasma polymerized functional supermagnetic Fe3O4 nanostructured templates for laccase immobilization: A robust catalytic system for bio-inspired dye degradation.

Fe3O4 magnetic nanoparticles, synthesized using co-precipitation method, were epoxy functionalized via plasma polymerization of 2,3-epoxypropylmethacrylate (EPMA) precursor. The EPMA-functionalized Fe3O4 nanoparticles (EPMA-f-MN) were employed as templates for facile, one-step covalent immobilization of laccase enzyme at room temperature. Samples were rigorously characterized by FTIR, TGA, SEM, TEM, XRD techniques, while Mössbauer spectroscopy (MöS) and vibrating sample magnetometry (VSM) confirmed the supermagnetic nature of Fe3O4 nanoparticles. Activities of free and immobilized laccase (ImLac) were assayed by spectrophotometrically monitoring the enzymatic reduction of substrate 2,2-azino-bis(3-ethylthiazoline-6-sulfonate) (ABTS) at 420 nm, corresponding to the λmax of ABTS.+. In addition to possessing higher thermal stability and a broader pH tolerance window compared to free laccase, the supermagnetic property of the Fe3O4 renders the ImLac system conveniently recoverable and recyclable. Practical applicability of ImLac towards catalytic degradation of industrial dyes was also ably demonstrated using Acid Blue 193 (AB 193) as a commercially used model textile dye, which belongs to the family of azo dyes. Over 95% degradation of the dye was achieved within a period of 4 hours. ImLac could be used for more than 10 dye degradation cycles with >90 % of retention in enzyme activity.

Highly Efficient Industrial Dye Degradation, Bactericidal Properties, and In Silico Molecular Docking Analysis of Ag/Cellulose-Doped CuO Nanostructures.

In this research, CuO nanostructures doped with Ag and cellulose nanocrystals (CNC) were synthesized using a facile coprecipitation technique. In this work, we doped Ag into fixed quantities of CNC and CuO to improve the photocatalytic, catalytic, and antibacterial activity. It was noted that catalytic activity increased upon doping, which was attributed to the formation of nanorods and a pH effect, while the reverse trend was observed in photocatalytic activity. The addition of Ag and CNC dopants into CuO improved the bactericidal efficacy for S. aureus and E. coli. In addition, to obtain insight into the possible mechanism behind their biocidal effects, molecular docking studies were conducted against specific enzyme targets: namely, dihydrofolate reductase from E. coli and DNA gyrase from S. aureus. This study suggested that codoped CuO could be highly efficient in the cleaning of polluted water and antibacterial applications.

Low temperature-synthesized MgAl2 O4 :Eu3+ nanophosphors and their structural validations using density functional theory: photoluminescence, photocatalytic, and electrochemical properties for multifunctional applications.

A low temperature-assisted and oxalyl dihydrazide fuel-induced combustion synthesized series of uncalcined MgAl2 O4 :Eu3+ nanophosphors showed an average crystallite size of ~20 nm, and bandgap energy (Eg ) of 4.50-5.15 eV, and were validated using density functional theory and found to match closely with the experimental values. The photoluminescence characteristic emission peaks of Eu3+ ions were recorded between 480 and 680 nm. The nanophosphors excited at 392 nm showed f-f transitions assigned as 5 D0 →7 FJ (J = 0, 1, 2, and 3). The optimized MgAl2 O4 phosphors had Commission Internationale de l'Eclairage coordinates in the red region, a correlated colour temperature of 2060 K, and a colour purity of 98.83%. The estimated luminescence quantum efficiency ( ) was observed to be ~63% using Judd-Ofelt analysis. Electrochemical and photocatalytic performance were explored and indicated its multifunctional applications. Therefore, MgAl2 O4 :Eu3+ nanophosphors could be used for the fabrication of light-emitting diodes, industrial dye degradation, and as electrodes for supercapacitor applications.

Green synthesis of Zn/Cu oxide nanoparticles by Vernicia fordii seed extract: their photocatalytic activity toward industrial dye degradation and their biological activity

Green synthesized Zinc oxide (ZnO NPs) and copper oxide nanoparticles (CuO NPs) via the aqueous essence of Vernicia fordii seed waste by solution combustion technique. UV–Visible, Fourier transform infrared spectroscopy, Scanning electron microscopy, and Transmission electron microscopy confirm the microstructure. X-ray diffraction fortified the wurtzite hexagonal crystalline (22 nm) and monoclinic (24 nm) phase of ZnO and CuO NPs. Energy Dispersive X-Ray analysis strengthened peaks for elemental copper, zinc, and oxygen without any peaks of impurities. Both the NPs offered an effective degradation of methylene blue (MB) dye under visible-light illumination (85% in 10 h and more than 99% in 24 h). The catalyst recycling proved its consistent reusability even after 03 consecutive employment. The decoloration of the dye reached 98–90% suggesting its reusability. Additionally, both lead the efficient antifungal activity against C. albicans fungi and antibacterial potential against Bacillus cereus and larvicidal activity against T. confusum larvae in 24 h.

Analysis of laccase-like enzymes secreted by fungi isolated from a cave in northern Spain.

Laccases belong to a family of multicopper enzymes able to oxidize a broad spectrum of organic compounds. Despite the well‐known property of laccases to carry out bleaching and degradation of industrial dyes and polyphenolic compounds, their industrial use is often limited by the high cost, low efficiency, or instability of these enzymes. To look for new microorganisms which produce laccases that are potentially suitable for industrial applications, we have isolated several fungal strains from a cave in northern Spain. Their phenotypic analysis on agar plates supplemented with ABTS (2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid)) disclosed two laccase‐positive strains. Further genotyping revealed that they belonged to the Gliomastix murorum and Conidiobolus thromboides species. The secretion of G. murorum and C. thromboides laccase‐like enzymes was then confirmed by zymography. Further identification of these polypeptides by mass‐spectroscopy revealed the nature of the laccases and made it possible to predict their functional domains and other features. In addition, plate assays revealed that the laccases secreted by both G. murorum and C. thromboides were capable of degrading industrial dyes (Congo Red, Indigo, and Eriochrome Black T). Homology modeling and substrate docking predicted the putative structure of the currently uncrystallized G. murorum enzyme as well as its amino acid residues potentially involved in interactions with these dyes. In summary, new biochemical and structural insights into decolorization mediated by G. murorum laccase as well as identification of laccase‐like oxidase in C. thromboides point to a promising future for these enzymes in biotechnology.

Synthesis and characterization of ZnGa2O4 composites and its photocatalytic properties for energy applications.

ZnGa2O4 nanocomposites have been widely used for photocatalytic degradation of industrial dyes. In this work, ZnGa2O4 was synthesized from zinc sulphate heptahydrate ZnSO4.10H2O and Gallium (III) oxide (Ga2O3) by hydrothermal method. As prepared, ZnGa2O4 nanocomposites was used as a photocatalyst degradation of three organic dyes rhodamine-B, methylene blue, and methyl orange, under ultraviolet (UV) light irradiation. The ZnGa2O4 nanocomposites structure, morphology, size and optical properties were studied by X-ray diffraction (XRD), Fourier transform Raman spectroscopy (FT-Raman), scanning electron microscopy (SEM), Transmission electron microscopes (TEM) and photoluminescence spectra (PL). Moreover, the results explained the rate-controlling mechanisms of the dye degradation process followed by second-order kinetics. After 100min of adsorption kinetic models, the decomposition of rhodamine-B (7.2 Ct mg/L, 5.2 Ct mg/L, and 4.1 Ct mg/L), methylene blue (42.8 qt mg/g, 44.8 qt mg/g, and 45.9 qt mg/g), and methyl orange (42.8 qe mg/g, 44.8 qe mg/g, and 45.9 qe mg/g) respectively. This investigation study offers a promising method to design more efficient ZnGa2O4 nanocomposites based photocatalytic degradation of industrial organic dyes.

Improved catalytic activity and bactericidal behavior of novel chitosan/V2O5 co-doped in tin-oxide quantum dots.

The novel V2O5/chitosan (CS) co-doped tin oxide (SnO2) quantum dots (QDs) were synthesized via co-precipitation technique. The optical, structural, morphological, and catalytic properties of the concerned specimens were examined by UV-Vis, PL, FTIR, X-ray diffraction, HR-TEM, and EDS. Structural analysis through XRD confirmed the tetragonal structure of SnO2; meanwhile, HR-TEM measurements unveiled quantum dot morphology. Rotational and vibrational modes related to functional groups of (O–H, C–H, Sn–O, and Sn–O–Sn) have been assessed with FTIR spectra. Through UV-Vis spectroscopy, a reduction in band-gap (4.39 eV to 3.98 eV) and redshift in co-doped spectra of SnO2 were identified. Both CS/SnO2 and V2O5-doped CS@SnO2 showed promising catalytic activity in all media. Meanwhile, CS/SnO2 showed higher activity for use in hospital and industrial dye degradation in comparison to dopant-free Ch/SnO2. For V2O5/CS@ SnO2 QDs, inhibition domains of G –ve were significantly confirmed as 1.40–4.15 mm and 1.85–5.45 mm; meanwhile, for G +ve were noticed as 2.05–4.15 mm and 2.40–5.35 mm at least and maximum concentrations, correspondingly. These findings demonstrate the efficient role of V2O5/CS@SnO2 QDs towards industrial dye degradation and antimicrobial activity.