Degradation Of Red Research Articles

Dual motion principal Au-Ni-PDA-CuS micromotors with NIR light and magnetic effect for detection of organic dye

Copper sulfide (CuS), despite some disadvantages such as rapid recombination, easy aggregation, photodegradation of oxidized CuS, and a limited ability to absorb light energy, is still a good photocatalyst. This semiconductor material with a narrow bandgap plays a significant role in the degradation of organic dyes. However, due to these mentioned drawbacks, it requires a linker. The polymer used as this intermediate binder is polydopamine (PDA). PDA not only eliminates the disadvantages of CuS but also facilitates its attachment to the carrier system, which is a micromotor. However, the purpose of using PDA here is not only to eliminate the disadvantages of CuS but also to enable light-triggered motion due to its sensitivity to near-infrared (NIR) radiation. Similarly, CuS, which is a good catalyst, has been used in the polymerization reaction to catalyze dopamine’s conversion to PDA. The micromotor used in the study, based on the dual-motion principle, exhibits high stability and good reusability. The synthesized Au-Ni-PDA-CuS composite micromotor demonstrates a good photocatalytic degradation performance under NIR irradiation. The degradation efficiency is 54.48% at the lowest concentration, while it is 17.72% at the highest concentration, indicating the effectiveness of the synthesized micromotors in achieving good photocatalytic degradation at low concentrations. As a result of the photocatalytic degradation reaction, cyclic voltammetry was performed for 100 cycles to demonstrate the stability of the micromotors.This study is based on the electrochemical method for the photocatalytic degradation of methyl red (MR), an azo dye, using micromotors with a dual-motion principle. Following the development on an azo dye, this study applied the same procedure on real samples, and through in vitro investigation, the photocatalytic degradation of the composite motor on real samples was observed electrochemically.

Degradation of Organic Dye Congo Red by Heterogeneous Solar Photocatalysis with Bi2S3, Bi2S3/TiO2, and Bi2S3/ZnO Thin Films

In this work, bismuth sulfide (Bi2S3) thin films were deposited by a chemical bath deposition (CBD) technique (called soft chemistry), while titanium dioxide (TiO2) nanoparticles were synthesized by sol–gel and zinc oxide (ZnO) nanoparticles were extracted from alkaline batteries. The resulting nanoparticles were then deposited on the Bi2S3 thin films by spin coating at 1000 rpm for 60 s each layer to create heterojunctions of Bi2S3/ZnO and Bi2S3/TiO2. These materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The optical and contact angle analyses were undertaken by UV–Vis spectroscopy and a contact microscopy angle meter, respectively. The calculated band gap values were found to be between 1.9 eV and 2.45 eV. The Bi2S3 presented an orthorhombic structure, the TiO2 nanoparticles presented an anatase structure, and the ZnO nanoparticles presented a wurtzite hexagonal crystal structure. Furthermore, heterogeneous solar photocatalysis was performed using the Bi2S3, Bi2S3/ZnO, and Bi2S3/TiO2 thin film combinations, which resulted in the degradation of Congo red increasing from 8.89% to 30.80% after a 30 min exposure to sunlight.

Photocatalytic degradation of Alizarin Red contaminant using Ag2CrO4@NiFe-LDH composite under visible light irradiation.

In this study, Ag2CrO4@NiFe-LDH nanoparticles were synthesized by hydrothermal method for photocatalytic degradation of Alizarin Red (AR) dye. Three composites with different molar percentages were prepared, among which 50%Ag2CrO4@50%NiFe-LDH composite was the best sample with a removal rate of 97.1% in AR degradation. Also, the properties, structure, and characteristics of pure Ag2CrO4 and NiFe-LDH and their composites were determined by XRD, FESEM, FTIR, EDX mapping, and UV-visible analyses. It was found that Ag2CrO4@NiFe-LDH composites with the formation of heterogeneous structure of Z-scheme, in addition to increasing the active sites and increasing the specific surface, decrease the recombination rate of pure Ag2CrO4 and NiFe-LDH. Also, the Box-Behnken design technique, which is one of the most common designs used in response surface methodology, was used to optimize the operating conditions and investigate the effect of 4 independent parameters: catalyst amount, solution concentration, pH, and light intensity. The importance of independent parameters and their interactions were determined by ANOVA. By means of numerical optimization, the optimal values of the selected parameters equal to 1.34 g/L of catalyst, concentration of 16.45 mg/L, pH = 10.74, and light intensity of 15.53 W were obtained as optimal conditions with a desirability coefficient of 1.00 and an absorption value of 89.34%. The closeness of adjusted R2 (0.9838) and predicted R2 (0.9507) values show that this model can be successfully used for prediction.

Synthesis and Characterization of Titania-Coated Hollow Mesoporous Hydroxyapatite Composites for Photocatalytic Degradation of Methyl Red Dye in Water

Hollow mesoporous hydroxyapatite (HM-HAP) composites coated with titania are prepared to increase the stability and catalytic performance of titania for azo dyes present in the wastewater system. In this work, HM-HAP particles were first synthesized by a hydrothermal method utilizing the CaCO3 core as a template and then coated with titania to form TiO2/HM-HAP composites. Utilizing SEM, XRD, XPS, BET, FTIR, EDS, UV–vis DRS spectroscopy, and point of zero charge (PZC) analysis, the coating morphological and physicochemical parameters of the produced samples were analyzed. The photocatalytic efficiency of the synthesized coated composites was assessed by the degradation of methyl red (MR) dye in water. The results indicated that TiO2/HM-HAP particles could efficiently photodegrade MR dye in water under UV irradiation. The 20% TiO2/HM-HAP coating exhibited high catalytic performance, and the degradation process was followed by the pseudo-first-order (PFO) kinetic model with a rate constant of 0.033. The effect of pH on the degradation process was also evaluated, and the maximum degradation was observed at pH 6. The analysis of degraded MR dye products was investigated using LC-MS and FTIR analysis. Finally, a good support material, HM-HAP for TiO2 coatings, which provides a large number of active adsorption sites and has catalytic degradation performance for MR dye, was revealed.

Cu-doped TiO2 spheres: enhanced solar-driven photocatalysis for hydrogen generation and degradation of methylene blue and Congo red

Cu-doped TiO2 spheres: enhanced solar-driven photocatalysis for hydrogen generation and degradation of methylene blue and Congo red

The role of aluminum nanoparticles in the visible light activated photocatalytic properties of laser ablation produced nano-alumina particles

In this experimental study, chemical agent contaminated water was treated by the photocatalytic activity of aluminum-alumina nanocomposite. Methyl red was used as the chemical agent pollutant. Nanocomposite was synthesized by laser ablation method. The presence of both Al and Al2O3 in the structure of synthesized nanocomposite and the structural and optical properties of Al/Al2O3 nanocomposite were evaluated by XRD, FESEM, TEM, and UV–Vis spectroscopy techniques. Photocatalytic activity of Al doped alumina nanocomposite was triggered by UV and visible light irradiation and results were compared. The highest efficiency of the photocatalytic treatment of water was due to degradation of methyl red under UV radiation. In spite of large bandgap energy of alumina nanoparticles, presence of Al atoms in the synthesized nanocomposite as the effective traps to prevent the recombination of electrons and holes was responsible for acceptable efficiency of Al/Al2O3 nanocomposite in degradation of methyl red dye under visible light irradiation. Effects of photocatalyst concentration and reaction temperature were also investigated.

Green Synthesis of Nickel Oxide Nanoparticles and its Application in the Degradation of Methyl Red

Environmental pollution is a threat to human health, with methyl red dye used in printing and textile dyeing being a notable pollutant that can cause eye, skin, and digestive system irritation. This study investigates the degradation of methyl red dye using nanoparticles of Nickel Oxide (NiO NPs) as photocatalysts. NiO NPs were synthesised at room temperature through thermal decomposition using antioxidant-rich extracts from strawberries (Fragaria ananassa), grapes (Vitis vinifera), and grapefruits (Citrus paradisi). Characterisation of the NiO NPs was performed using FTIR, UV-Vis spectroscopy and SEM. FTIR spectra confirmed the formation of NiO NPs with peaks between 577 – 585 cm–1. UV-Vis spectroscopy showed absorption wavelengths between 322-326 nm for the synthesised NiO NPs and a blue shift to 422-470 nm during methyl red degradation. This study presents a sustainable method for synthesising NiO nanoparticles and demonstrates their effectiveness in environmental remediation, specifically for the removal of pollutant dyes.

Antioxidant, dye degradation, and molecular docking studies of orange peel extract derived Ag-Fe-Ni nanoparticles

Nanotechnology has the potential to govern matter at the nanoscale and revolutionise a number of industries, including materials science, hardware, pharmaceuticals, and energy, by facilitating the production of novel materials, technologies, and ideas with exciting properties and uses. This work presents a sustainable process of synthesising Ag-Fe-Ni trimetallic nanoparticles from orange peel extract (Citrus sinensis (L.) Osbeck), which functions as a reducing and capping agent. The nanoparticles were effectively synthesised and characterised using a number of methods, including UV–Vis, Zeta potential, FESEM, EDX, and XRD. The effectiveness of the anti-cancer, catalytic, and antioxidant properties were assessed. Molecular docking was conducted on the synthesised compounds to examine their potential in relation to the complex of ERK2 and catechol. According to the results, the molecules with the least binding energy was 15.55 kcal/mol. Also the synthesied nanoparticles showed increased antioxidant activity and the degradation of methyl red, phenol red, and eosin yellow. Ag-Fe-Ni trimetallic nanoparticles showed antioxidant activity of 89.94 % at 1000 µg/mL. In 60 min, methyl red degraded to 97.67 %. The synthesised compounds have the potential to serve as lead compounds through further optimisation and have anti-cancer activities, as demonstrated by the results of molecular docking study. Thus, Ag-Fe-Ni trimetallic nanoparticles generated from orange peel may serve as a novel antioxidant, catalytic, and anti-cancerous agent.

NiO/MnFe2O4 Nanocomposite Photoluminescence, Structural, Morphological, Magnetic, and Optical Properties: Photocatalytic Removal of Cresol Red under Visible Light Irradiation.

In this study, pure nickel oxide (NiO), manganese ferrite (MnFe2O4 or MFO), and binary nickel oxide/manganese ferrite (NiO/MFO1-4) nanocomposites (NCs) were synthesized using the Sol-Gel method. A comprehensive investigation into their photoluminescence, structural, morphological, magnetic, optical, and photocatalytic properties was conducted. Raman analysis, UV-Vis spectroscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction techniques were used to characterize the materials. The synthesized samples exhibited superparamagnetic behavior, as revealed by our analysis of their magnetic properties. A lower recombination rate was shown by the photoluminescence analysis, which is helpful for raising photocatalytic activity. The photocatalytic activity was evaluated for the degradation of Cresol Red (CR) dye. 91.6% of CR dye was degraded by NiO/MFO-4 nanocomposite, and the NC dosage as well as solution pH affected the photocatalytic performance significantly. In four sequential photocatalytic cycles, the magnetically separable NCs were stable and recyclable. The enhanced photocatalytic activity and magnetic separability revealed the potential application of NiO/MFO-4 as an efficient photocatalyst for the removal of dyes from industrial wastewater under solar light irradiation.

Degradation of Methyl Red (MR) dye via fabricated Y2O3–MgO/g-C3N4 nanostructures: Modification of band gap and photocatalysis under visible light

In this study, graphitic carbon nitride (g-C3N4) composites with metal oxide nanoparticles (Y2O3, MgO) and their combination (CN, YCN, MCN and YMCN) were synthesized by an ultrasonic technique and were then characterized by different tools such as UV–Vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis and X-ray photoelectron spectroscopy (XPS). From the XRD diffractograms of the YMCN ternary composite, the g-C3N4, cubic MgO and Y2O3 structural phases were identified. The morphology of the as prepared nanostructure from the SEM analysis revealed the dispersion of the metal oxides nanoparticles with the graphitic sheets and the presence of the corresponding elements were confirmed by the EDX and XPS data. The FT–IR bands confirmed the bonding of the metal oxides to the nitride host as indicated by the characteristic modes. A reduction of the band gap energies was confirmed by the UV–Vis to indicate its visible light possible photoactivity. Accordingly, its visible light driven photocatalytic performance was assessed for methyl red degradation. The degradation competence was highest for the ternary composite YMCN due to the coupling of the semiconductors which increases the absorption and the charge carriers’ separation as well. The kinetics of degradation was best described by pseudo-first-order, and the most active species were the holes and the hydroxyl radicals. Thus, the YMCN nanocomposite is a visible light-active photocatalyst which can be engaged in the degradation of organic pollutants.

Investigating the structural, dielectric, optical and photocatalytic properties of carbon dots and palladium, platinum decorated carbon dots

In this study carbon dots (CDs), palladium and platinum decorated carbon dots (Pd-CDs, Pt-CDs) were synthesized by hydrothermal method. The synthesized materials were characterized by Transmission Electron Microscope (TEM), X-ray Diffractometer (XRD), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Photoluminescence (PL) and impedance analyzer. Photoluminescence study revealed that the CDs, Pd-CDs and Pt-CDs were fluorescent in nature. A comparative study was conducted to investigate the energy storage capacity of the different materials. The photocatalytic properties of the materials were studied through the degradation of Acid Red 4(AR-4) a member of azo dyes. For better photocatalysis optimized reaction parameters were concentration; 10 ppm, temperature; 328 K, time; 120 min and catalyst amount; 0.12 g/20 ml. Photocatalysis for Pt-CDs was observed superior than Pd-CDs and CDs. The degradation of AR-4 over Pt-CDs follows first order kinetics with rate constant of 2.2 × 10−3 min−1. Both experimental and theoretical findings revealed that the Pt decorated CDs have high catalytic activity due to its low band gap energy 1.235 eV as compared to CDs and Pd decorated CDs. Catalysts used for photodegradation exhibited exquisite regeneration capacity with minimal loss in activity.

Photocatalytic degradation of Acid Red 18 by synthesized AgCoFe2O4@Ch/AC: Recyclable, environmentally friendly, chemically stable, and cost-effective magnetic nano hybrid catalyst

Chitosan (Ch) is a linear biodegradable natural carbohydrate polymer and the most appealing biopolymer, such as low-cost biodegradability, biocompatibility, hydrophilicity, and non-toxicity. In this case, Ch was utilized to synthesize AgCoFe2O4@Ch/Activated Carbon (AC) by the modified microwave-assisted co-precipitation method. The physical and chemical structure of magnetic nanocomposites was analyzed and characterized by Field Emission Scanning Electron Microscope (FESEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Energy Dispersive Spectroscopy (EDS), Diffuse Reflection Spectroscopy (DRS), Value stream mapping (VSM), Fourier transform spectroscopy (FTIR) and BET. The effects of various parameters on the removal of dye (Acid Red18), including catalyst dose, dye concentration, pH, and time were studied. Results showed that the highest removal efficiencies were 96.68 % and 84 % for the synthetic sample and actual wastewater, respectively, in optimal conditions (pH: 3, the initial dye concentration: 10 mgL−1, the catalyst dose: 0.14 gL−1, time: 50 min). Mineralization, according to the COD analysis, was 89.56 %. Photocatalytic degradation kinetics of Acid Red 18 followed pseudo-first order and Langmuir-Hinshelwood with constants of kc = 0.12 mg L−1 min−1 and KL-H = 0.115 Lmg−1. Synthesized photocatalytic AgCoFe2O4@Ch/AC showed high stability and after five recycling cycles was able to remove the pollutant with an efficiency of 85.6 %. So, the synthesized heterogenous magnetic nanocatalyst AgCoFe2O4@Ch/AC was easily recycled from aqueous solutions and it can be used in the removal of dyes from industries with high efficiency.

Green synthesis, characterization and applications of Phyllanthus emblica fruit extract mediated chromium oxide nanoparticles

The green synthesis of metallic nanoparticles is attributable towards diverse applications in various fields, recently. In this research, we report simple and eco-friendly synthesis of chromium oxide (Cr2O3) nanoparticles using the fruit extract of Phyllanthus emblica as a reducing and capping agent. The absorbance peaks at 350 nm and 450 nm validated the nanoparticle formation in UV–visible spectrum. FTIR spectrum revealed the nature of functional groups. The crystalline properties of nanoparticles were ascertained by XRD analysis. EDX spectrum corroborated the elemental composition of nanoparticles in which chromium and oxygen constituted 68% of total weight. SEM images demonstrated agglomeration of nanoparticles resulting in the formation of large irregularly shaped flakes. Cr2O3 nanoparticles demonstrated excellent antimicrobial properties against 11 bacterial isolates and 1 fungal isolate. The largest inhibition zone (53 mm) was measured against A. baumannii while the smallest inhibition zone (26 mm) was recorded against S. aureus. Minimum inhibitory concentration (MIC) values were < 1 µg/ml for all microbes. However, the synthesized nanoparticles did not reveal synergism with any of the selected antibiotics (FICI values > 1). Nanoparticles possessed potent anti-biofilm powers with maximum (77%) inhibition of E. coli biofilms and minimum (45%) inhibition of S. enterica biofilms. Photocatalytic activity of Cr2O3 nanoparticles was evaluated to determine their efficacy in environmental bioremediation. Outcomes demonstrated degradation of methyl red (84%) but not of methylene blue dye. Furthermore, the Cr2O3 nanoparticles displayed considerable antioxidant (43%) as well as anti-inflammatory (44%) potentials. Hence, the present study accounts for the versatile applications of P. emblica-mediated Cr2O3 nanoparticles which could be pursued for future biomedical and environmental applications.Graphical

Photoluminescence and Photocatalytic Degradation of Methylene Blue and Methyl Red using Pr3+ Doped CdS Nanoparticles

Photoluminescence and Photocatalytic Degradation of Methylene Blue and Methyl Red using Pr3+ Doped CdS Nanoparticles

Synthesis and Characterization of Hydroxyapatite/Titania Composite and its Application on Photocatalytic Degradation of Remazol Red B Textile Dye under UV Irradiation

Synthesis and Characterization of Hydroxyapatite/Titania Composite and its Application on Photocatalytic Degradation of Remazol Red B Textile Dye under UV Irradiation

Graphene oxide-modified polythiophene nanohybrids: antibacterial properties and sonophotocatalytic degradation of dyes under visible-light irradiation

The present work highlights the synthesis of graphene oxide (GO) modified polythiophene (PTh) for its application as an antibacterial agent as well as a visible light active photocatalyst. PTh was synthesized via the interfacial polymerization method using FeCl3 as initiator and then formulated as nanohybrids by mixing it in different weight ratios with graphene oxide (GO) i.e., 1 wt.%,3 wt.% and 5 wt. %. PTh and GO/PTh nanohybrids were characterized using FTIR, UV-visible, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) techniques. The polymerization of PTh as well as modification of PTh with GO was confirmed by IR studies, while the shifting of electronic transitions of PTH upon modification with GO were confirmed by the UV-visible studies. The degradation of dyes, Alizarin Yellow (AY), Basic Blue (BB) and Congo Red (CR) was carried out via sonophotocatalysis under visible light using PTh and GO/PTh as catalysts for a period of 60 min. The GO/PTh revealed higher degradation efficiency as compared to PTh. To evaluate its effectiveness as an antibacterial agent against Bacillus subtilis, disk diffusion inhibitory assay was carried out under dark and light conditions. The results showed that PTh and GO/PTh nanohybrids had bactericidal properties, regardless of light exposure. The results of the minimal inhibitory concentration (MIC) assay indicated the nanohybrid of 3-GO/PTh had the lowest MIC, followed by 1-GO/PTh and 5-GO/PTh.

Noncovalent Doping of Fullerene (C60) into ZnAl–LDH/PVA Matrix and Photocatalytic Degradation of Methylene Blue and Congo Red from Water

Noncovalent Doping of Fullerene (C60) into ZnAl–LDH/PVA Matrix and Photocatalytic Degradation of Methylene Blue and Congo Red from Water

1D + 3D → 3D zinc polyrotaxane MOF: Selective fluorescent detection of nitrobenzene, uric acid and sucrose and photocatalytic degradation of Rose Bengal and Congo Red dyes

A new Zn based polyrotaxane 3D metal-organic framework (MOF), {[Zn3(BTC)2(Bimb)3.5][Zn(HCOO)(Bimb)1.5]·CH3COO·2(CH3)2NH·2DMF·9H2O}n (KA@MOF-S2)(Bimb = 1,4-bis[(1H-imidazol-1-yl)methyl]benzene, BTC3‒ = 1,3,5-benzenzetricarboxylate) has been synthesized under solvothermal conditions. Single-crystal X-ray diffraction analysis reveals that KA@MOF-S2 exhibits a novel 1D + 3D → 3D interpenetratedPolyrotaxane MOF architecture. KA@MOF-S2 possesses a new 3,3,3-c net 3-nodal interpenetrated network with (122.14)(8.122)(83)2 topology. KA@MOF-S2 can be used as a selective fluorescence sensing material for the quantitative detection of VOCs (Acetone, NB), antibiotic (NFT) and biomolecules (UA, sucrose) and photocatalytic degradation of Rose Bengal (RB) and Congo Red (CR) dye under sun-light irradiation.

Advancing photocatalysis: Innovative approaches using novel V2O5/ZnO nanocomposites for efficient photocatalytic degradation of tubantin red

Photocatalytic response of V2O5, ZnO, and V2O5/ZnO nanostructures for the degradation of Tubantin red 8BL dye has been reported. Pure V2O5, ZnO, and V2O5/ZnO composite nanostructures were synthesized through a hydrothermal method. UV–Visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray microscopy (EDX), and Fourier-transform infrared spectroscopy (FTIR) characterizations were done to examine their bandgap energy (Eg), morphology, composition, and structure, respectively. These discoveries advance our knowledge of the agglomerated nanoparticles of V2O5, ZnO, and V2O5/ZnO for their prospective photocatalytic uses. The presence of V2O5 and ZnO in composite is confirmed through the analysis of FTIR. Flower shaped morphology was observed in V2O5/ZnO nanocomposite by SEM. The 2.83 eV bandgap energy was observed in composite. The nanocomposite was evaluated for Tubantin red 8BL photodegradation. The efficiencies of pure ZnO nanoparticles after 25 min, 50 min, 75 min, 100 min, 125 min, and 150 min irradiation are 54.54 %, 58.00 %, 61.41 %, 63.84 %, 71.19 %, and 78.53 %; for pure V2O5 nanoparticles, they are 72.72 %, 76.45 %, 80.85 %, 85.42 %, 89.99 %, and 94.32 %. Similarly, the efficiencies (%) of V2O5/ZnO composite nanoparticles are 45.10 %, 53.27 %, 60.75 %, 68.24 %, 79.99 %, 91.74 %, and 99.79 %, respectively. Reusability studies (three cycles) were used to further confirm the photocatalytic efficiency, and the findings of the subsequent characterization revealed an arrangement of crystalline layers which is the cause of the high efficiency. These nanostructures also demonstrated stability across three cycles, suggesting more photocatalytic uses for them in the future.

UV photocatalytic remediation of Methyl Red in aqueous medium by sulfate (SO4•-) and hydroxyl (•OH) radicals in the presence of Fe2+and Co@TiO2 NPs photocatalysts

Metal doping is an efficient approach to improve the performance of photocatalysts, and few attempts have been made to apply mixed metals as dopants. In this work, the decomposition of methyl red (MR) was investigated using UV/peroxymonosulfate (PMS)/Fe2+ (homogeneous) and UV/PMS/Co@TiO2 NPs (heterogeneous) advanced oxidation process (AOP) systems. The Co@TiO2 NPs for UV/PMS/Co@TiO2 nanoparticle (NPs) system was prepared by a simple reduction method. The prepared samples were characterized by transmission electron microscopy (TEM), Fourier transformer infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and energy dispersive X-ray (EDX). The small peak at 38° (004) angle indicates the presence of cobalt. The peak increased with the increase in cobalt concentration. The doped Co-TiO2 showed larger particle size due to the greater ionic radius of Co (0.74 Å) than TiO2 (0.60 Å). The photocatalytic efficiency of the catalysts was evaluated by degradation of methyl red (MR) at a wavelength of 503 nm under UV irradiation. The results showed that Co/TiO2 photocatalyst containing (0.015 g) exhibited the highest removal efficiency of 20% for adsorption of MR after 1 h in the dark. Subsequently, superior photocatalytic activity for the degradation of MR, with 99% removed after 18 min was demonstrated. The Kapp (rate constant) was found to be approximately 5.554 min−1. It was determined that the synthesized Co@TiO2 NPs remained stable during the photocatalytic reaction which could be used repeatedly with excellent degradation efficiency, hence, exposing their promising application in the treatment of wastewater. The mineralization of methyl red was confirmed by total organic carbon (TOC) analysis. The results will be useful for future enhancement of active heterogeneous photo-Fenton catalysts for developing organic dye-containing wastewater handling procedures.