Reduction Of Methylene Blue Dye Research Articles

Facile synthesis of MnO2/g-C3N4 for photocatalytic reduction of methylene blue dye under visible light

Facile synthesis of MnO2/g-C3N4 for photocatalytic reduction of methylene blue dye under visible light

Synthesis and characterization of cobalt doped zinc oxide nanoparticles and their application for catalytic reduction of methylene blue dye

The co-precipitation approach has been used in the current research work to synthesize cobalt-doped zinc oxide nanoparticles (ZnO NPs) employing zinc and cobalt nitrate hexahydrate as precursor salts. Ultraviolet-visible spectra and Fourier transform infrared were used to confirm that the manufacturing procedure was efficient and that the synthesized sample contained a range of unique binding sites. The catalytic efficacy of the prepared nanoparticles for the reduction of Methylene blue dye in the presence of NaBH4 as a reducing agent has been investigated. The concentration of methylene blue, the catalyst dose, and the concentration of sodium borohydride all play significant roles in the catalytic reduction of methylene blue (MB). The best result for the complete reduction of methylene blue was obtained in 14 min of reaction time. Catalytic reduction of methylene blue in the involvement of synthesized nanoparticles was found to be followed by the Langmuir-Hinshelwood mechanism. Concerning this process, the reduction reaction is affected by the quantity of methylene blue, catalyst, and sodium borohydride. This effective catalytic activity of Co-doped ZnO nanoparticles suggests that these NPs can work wonders as nano-catalysts for the reduction of hazardous dyes.

Photocatalytic Degradation Activity of the Biosynthesized R. rosifolius Mediated Silver Nanoparticles in Methylene Blue Dye

Water pollution is a chronic problem affecting the entire ecosystem. To partly remediate water pollution, wastewater treatment prior to disposal must be done regularly. Here, the photocatalytic degradation of methylene blue (MB) dye was assessed using R. rosifolius Linn (also known as sampinit) aqueous fruit extract silver nanoparticles (SAFE-AgNPs). In this study, the SAFE-AgNPs were utilized to remediate wastewater contaminated with methylene blue (MB) dye which is harmful to the environment, aquatic and human lives. As previously described, SAFE-AgNPs were synthesized via a simple ‘one-pot’ approach. SAFE-AgNPs were assessed for their photocatalytic reduction of MB dye following sunlight or LED irradiation. Kinetic adsorption models were employed to determine the adsorption uptake of MB by SAFE-AgNPs. Photocatalytic degradation of methylene blue by SAFE-AgNPs was achieved under sunlight and LED irradiations at 98.8% and 97.6%, respectively. These results on the photocatalytic degradation of MB by SAFE-AgNPs may offer a potential strategy in wastewater treatment.

Silver nanoparticle incorporated calcium crosslinked hydrogel composite for reduction of methylene blue dye and nitrite sensing

The dissipative convective procedure was used, followed by the freeze-drying technique to successfully fabricate self-organized alginate/xantham gum (Alg/XG) composite materials encapsulating silver nanoparticles (AgNPs) and without nanoparticles and cross-linked with CaCl2 and prepared Alg/XG/AgNPs/Dex/Ca nanocomposite. The synthesized nanocomposite was thoroughly characterized by techniques such as Fourier transform infrared spectroscopy (FT-IR), N2 adsorption Study (BET), X-ray diffraction (XRD), Scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDAX), and Transmission electron microscopy (TEM). The results revealed that Alg/XG/AgNPs/Dex/Ca composites showed remarkably porous structures with ordered capillaries. These nanocomposites were assessed for catalytic reduction of methylene blue (MB) dye. The Alg/XG/AgNPs/Dex/Ca composite competently reduced the MB dye within 50 s in the presence of NaBH4 with a rate constant of 0.31907 min−1 and also showed 98 % degradation. It was established that the reduction reaction follows pseudo-first-order kinetics. The value of △H0 is −113.85 kJ mol−1 confirmed the exothermic nature and the positive values of △S0 (259.96 J k−1mol−1) suggested good affinity of the MB dye molecules toward the absorbent. The Activation energy of the reaction is 11.65 kJ mol−1. Furthermore, as-prepared Alg/XG/Dex/AgNPs/Ca was tested for the electrochemical oxidation of nitrite, which also gave good results. It sensed the nitrite with LOD and LOQ values of 0.10 ng mL−1 and 0.36 ng mL−1, respectively, and a sensitivity of 276.4451 μA/μM/cm2 was calculated. The results reveal that synthesized nanocomposite is a promising nano-catalyst in the degradation of MB dye and the electrochemical investigation of nitrite.The use of nanoparticles-incorporated composites as catalysts opens a range of new possibilities for applications in the area of catalysis.

Synthesis of optically enriched cobalt-doped zinc oxide nanocomposites: Reduction of methylene blue dye

This study reports the synthesis of highly pure nanosized composite materials using a sol-gel self-combustion synthesis (SCS) approach. The complex generated within the polyvinyl alcohol and precursor(s) induces combustion once the ignition temperature is reached, resulting in a porous nanocatalyst as the gaseous by-products are removed. The XRD and TEM morphological analyses confirmed the crystalline nature, interstitial inclusion of cobalt into the ZnO lattice, and the nanoscale size range (20–50 nm) of the synthesized materials. The photoluminescence spectra of the doped nanocomposites showed a significant decrease in intensity as well as a high percentage of visible light absorption potential over pure ZnO NPs. This confirms the presence of better charge transfer and its significance in preventing electron-hole recombination processes. The UV–vis-DRS and Mot-Schottky investigations showed better optoelectronic properties for the cobalt-doped ZnO composites (CZ-Cs) compared to that of the pure ZnO NPs. The indirect bandgap reduction (redshift) from 3.22 to 2.70 eV shows the perfect inclusion of cobalt in the ZnO lattice. It was revealed that the CZ-Cs showed better catalytic reduction potential for methylene blue dye within 12 min than ZnO. Thus, the solution combustion synthesis approach effectively synthesizes optoelectrically improved nanocomposite materials, which have promising prospects for catalysis, sensors, and biomedical applications.

Preparation and characterization of ZnS:MgS nanocomposites for photocatalytic and antioxidant applications

In the present study, the pure ZnS and MgS quantum dots (QDs) were synthesized by co-precipitation method and the ZnS:MgS nanocomposites were prepared from these QDs in the ratios, 4:1, 1:1 and 1:4. The synthesized nanocomposite were characterized by structural, morphological, compositional and optical by X-Ray Diffraction (XRD), Transmission Electron Microscope (TEM), Energy Dispersive X-ray (EDAX), and UV–visible absorption techniques. The ZnS and MgS were in cubic crystalline structure with high phase purity. The average crystallite structure had been calculated as 1.8 and 4.8 nm for ZnS and MgS quantum dots, respectively. The absorption was increasing by the increase of MgS concentration in composite and the band gap is narrowing due to the compositional and size effects. The ZnS:MgS nanocomposites have been used as a photocatalyst for the reduction of methylene blue dye. Though, all the nanocomposites possessed with photocatalytic activity, ZnS:MgS (4:1) showed excellent efficiency and rapid decolourization. Moreover, reusability of these nanocomposite were analysed. The Antioxidant activity of the pure ZnS and MgS and their composites was evaluated by DPPH radical scavenging method and vitamin E (Vit. E) was used as a standard drug.

Kaolin-Supported Silver Nanoparticles as an Effective Catalyst for the Removal of Methylene Blue Dye from Aqueous Solutions.

Water contamination by organic dyes has become a reason for severe environmental pollution and has been threatening the aquatic ecosystem. In this study, kaolin-supported silver nanoparticle (Ag-NP) composites were synthesized by a facile two-step adsorption-reduction method through the reduction of silver ions adsorbed onto locally available, inexpensive, and easily pretreated kaolin surfaces by using sodium borohydride (NaBH4) for the catalytic degradation of methylene blue (MB) dye in aqueous solution. The morphology, structure, surface area, and interaction of the synthesized materials were investigated by scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller, and Fourier transform infrared spectroscopy, respectively. Characterization results showed the successful growth of Ag-NPs on the kaolin surface. To understand the catalytic degradation performance of the catalyst, batch experiments were carried out using MB dye as a model dye. The catalytic reduction tests confirmed the importance of Ag-NPs and the high catalytic activities of the synthesized Ag-NPs/kaolin composite toward MB dye reduction. The degradation results indicated that the increased Ag-NP content on the kaolin surface through repeating cycles could effectively enhance the removal of MB dye from an aqueous solution. The kinetic analysis of the MB dye degradation of the catalyst has fitted the pseudo-first-order kinetic model. More than 97% removal efficiency was still present after five reuse cycles, demonstrating exceptional stability and reusability of the composite. In conclusion, the Ag-NPs supported kaolin (Ag-NPs/kaolin) composite was found to be a promising catalyst for the excellent catalytic activity to reduce a model dye MB from the aqueous solution in the presence of NaBH4 with catalytic efficiency higher than 97% and a reduction rate constant, k red, higher than 0.86 min-1.

Poly (N-tert-amylacrylamide -co- Acrylamide/ Sodium acrylate) Fe3O4 Nanocomposite Hydrogels as polymer catalyst for the reduction of Methylene Blue Dye

Fe3O4 Nanocomposite Hydrogels were prepared by free radical polymerization using N-tert-amyl acrylamide , Acrylamide and Sodium acrylate monomers at 60OC. Fe3O4 NPs was intercalated via in situ method. The synthesized nanocomposite Hydrogels conformed by FT-IR spectroscopy. Surface morphology of the nanocomposite hydrogels indicated the ferrate nanoparticles are intercalated uniformly throughout the polymer matrix. The XRD pattern of the hydrogel showed the presence of nanoparticles in the matrix with certain crystallinity nature. UV-visible absorption studies reveal the catalytic activity of Methylene Blue dye molecules in the aqueous medium by the Nanocomposite hydrogels.

Layer-by-Layer Extracellular Biological Synthesis of Sustainable Ag-Based Nanoparticles for Catalytic Reduction of Methylene Blue Dye

Novel cubic microstructures for the purposes of plasmonic Ag-based NPs were made using biological wastes produced from a microbial culture of Bacillus cereus (B. cereus) employing a bottom-up approach for the biosynthesis of metal-based nanomaterials. The unique surface plasmon resonance (SPR) of the as-prepared Ag-based NPs was detected at 405 nm. The infra-red spectrum revealed that the used biological waste effectively stabilized our Ag-based NPs. Scanning and transmission electron microscopes were used in order to evaluate the sizes and shapes of the distinctive structures present in our samples. The Ag NPs had a face-centered cubic structure, with a size of 64.4 nm for the (200) nano-crystallites, according to the X-ray diffraction that was conducted. The zeta potential was found to be −19.5 mV and the dynamic light scattering (DLS) size was 238.8 nm. Methylene blue’s (MB) reaction with NaBH4 was used in order to measure the catalytic activity of the generated Ag-based NPs over a period of 1 to 5 min. With an astonishing reaction rate of 0.2861 min−1, the MB elimination percentage reached 67% in just 5 min, displaying outstanding catalytic activity. This work can therefore encourage the use of this biowaste for the ecologically benign, cost-effective, and long-term synthesis of innovative Ag-based nanoparticles and nanostructures, as well as in their use as catalysts in the catalytic reduction in MB.

Catalytic behavior and antibacterial/antifungal activities of new MNPs/zeolite@alginate composite beads.

In this paper, a new family of composite materials was prepared based on calcium alginate and metal nanoparticle-loaded zeolite omega. Different types of metal nanoparticles (MNPs), namely Cu, Co and Fe, were loaded onto zeolite omega to test the performance of the resulting metal/zeolite@alginate composites towards the catalytic reduction of methylene blue dye. To examine their application field as broadly as possible, these composite beads were also tested as antibacterial and antifungal agents against several types of bacteria. Several techniques such as XRD, XRF, FTIR, XPS, SEM and TGA were used to characterize the samples. The obtained results showed that all the composite bead samples were effective in the reduction of MB dye. The composite Co/Zeolite@ALG with relatively low Co nanoparticle (NP) content was selected as the best performing catalyst due to its reduction of MB dye being completely achieved in 3min with a rate constant of 1.4min-1, which was attributed to its highly porous structure. The reuse tests conducted on the best-performing catalyst showed good results which persisted through five successive cycles. For antibacterial and antifungal activities, the Cu/Zeolite@ALG and Fe/Zeolite@ALG composites showed good activity with significant inhibition zones.

Green Synthesis of Silver Nanoparticles Using Coffee Extract for Catalysis

The green synthesis method for producing metal nanoparticles has become more popular because it is more environmentally friendly and low cost. This study used a green approach to synthesize silver nanoparticles (AgNPs) using coffee Arabica bean's extract to reduce and stabilizing agents. The coffee extract was analyzed using GC-MS to identify the bioactive compounds in the extract, and Folin-Ciocalteu colorimetric test was done to find the total phenols in the extract. Later, the extract was used in the synthesis of AgNPs. Effects of synthesis parameters such as temperature, reaction time, pH, and amount of coffee extract on the formation of AgNPs were investigated. The formation of AgNPs was mainly observed using UV-Vis absorption spectroscopy. It was found that pH influenced the size of particles produced in which higher pH produce smaller particles than lower pH while other synthesis parameters mainly affected the yield of the AgNPs. The catalytic application of as-synthesized AgNPs was then evaluated in reducing methylene blue (MB) dye in a solution using NaBH4 as a reducing agent. The results show that the green- synthesized AgNPs were capable of catalyzing the reduction of MB dye in the solution.

Photocatalytic application of graphene oxide–ZnO nanocomposite for the reduction of methylene blue dye

The graphene oxide (GO) and GO–zinc oxide (GO–ZnO) nanocomposite were prepared using simplified techniques with modified Hummer’s and solvothermal methods for photocatalytic application. In a comparative study, the optimized geometries, binding energies, electronic properties, non-linear optical properties and density of states (DOS) of GO–ZnO were calculated using density functional theory calculations with the B3LYP method and 6-31G (d,p) and LanL2DZ basis sets to examine the binding site of a methylene blue (MB) dye systematically. The result of natural bond orbital analysis revealed the effective charge transfer and also explained the mechanism and efficiency of the photocatalytic activity of GO–ZnO. DOS supported the strong interaction of MB with GO–ZnO leading to the degradation of the MB dye. The theoretical results obtained depict the existence of n → σ*, n→ n* and σ → σ* interactions, improved charge transfer, and reduced band gap which establish the use of GO–ZnO in visible light photocatalysis. Characterization methods such as x-ray diffraction (XRD), Fourier transform infrared (FTIR) and ultraviolet (UV) analysis were carried out to support our theoretical results. The XRD results confirmed the particle size of 21 nm with inter-layer spacing of 0.87 nm. FTIR spectroscopy indicated the characteristic bands related to the elements in GO–ZnO. The higher electrical conductivity was studied using UV–Vis spectral analysis. The calculated results show good agreement with experimental observations which reveal that the GO–ZnO nanocomposite has good photocatalytic behavior.

Antioxidant and Organic Dye Removal Potential of Cu-Ni Bimetallic Nanoparticles Synthesized Using Gazania rigens Extract

Copper-nickel bimetallic nanoparticles (Cu-Ni BNPs) were fabricated using an eco-friendly green method of synthesis. An extract of synthesized Gazania rigens was used for the synthesis of BNPs followed by characterization employing different techniques including UV/Vis spectrophotometer, FTIR, XRD, and SEM. Spectrophotometric studies (UV-Vis and FTIR) confirmed the formation of bimetallic nanoparticles. The SEM studies indicated that the particle size ranged from 50 to 100 nm. Analysis of the BNPs by the XRD technique confirmed the presence of both Cu and Ni crystal structure. The synthesized nanoparticles were then tested for their catalytic potential for photoreduction of methylene blue dye in an aqueous medium and DPPH radical scavenging in a methanol medium. The BNPs were found to be efficient in the reduction of methylene blue dye as well as the scavenging of DPPH free radicals such that the MB dye was completely degraded in just 17 min at the maximum absorption of 660 nm. Therefore, it is concluded that Cu-Ni BNPs can be successfully synthesized using Gazania rigens extract with suitable size and potent catalytic and radical scavenging activities.

M (M: Cu, Co, Cr or Fe) nanoparticles-loaded metal-organic framework MIL-101(Cr) material by sonication process: Catalytic activity and antibacterial properties

The current study deals with the preparation and development of nanomaterials based on iron, copper, chromium or cobalt to study their antibacterial and catalytic properties. To achieve this, the different metals were dispersed in the material MIL-101(Cr) by an ultrasonic-assisted method and then treated by chemical reduction in order to produce corresponding metal nanoparticles (MNPs). The obtained nanocatalysts MIL-101(Cr)/MNPs were characterized by various techniques such as XRD, XPS, SEM, TEM, FTIR; TGA, XRF, Adsorption-desoprtion of nitrogen at 77 K and UV–vis DR. The results showed that the nanocatalysts consist of a mixture of metal phases and oxides. All the prepared nanocatalysts were evaluated based on their performance in reducing the methylene blue (MB) dye in the presence of NaBH4 as reducing agent, for selection of the optimal catalyst. The best catalytic activity was obtained by the MIL-101 (Cr)/CuNPs nanocatalyst in which 6 min was sufficient to reduce the MB dye and the recorded rate constant kapp was 0.503 min−1. The performance of this catalyst was evaluated by varying the effects of three important parameters such as catalyst loading and the concentration of NaBH4 and MB dye. The study of the effects of these three parameters on the reduction process reveals that more than 99% of MB dye was reduced using 0.6 mM of MB dye, 6.8 mM of NaBH4 and 3 mg of nanocatalyst. The kinetic study shows that the reduction of MB dye by the MOF-101(Cr)/CuNPs nanocatalyst follows pseudo-first order kinetics. In addition, the MIL-101(Cr)/CoNPs and MIL-101(Cr)/CuNPs samples demonstrated efficacy at inhibiting bacterial and fungal growth. Hence, it is concluded through this work that the nature, size and concentration of nanoparticles present in the MOF matrix are the key parameters that can influence the catalytic and antibacterial properties of these MNP-loaded MIL-101(Cr) systems.

CuNPs-loaded amines-functionalized-SBA-15 as effective catalysts for catalytic reduction of cationic and anionic dyes

This work involves the preparation of mesoporous silica SBA-15 functionalized by different amines in order to stabilize the copper nanoparticles and using the obtained materials as catalysts for the catalytic reduction of methylene blue (MB) and Orange G (OG) dyes in simple and binary systems. The obtained results clearly show that the nature of the functionalized amines significantly influences the size, dispersion and content of copper nanoparticles (CuNPs). Ultrafine nanoparticles were obtained by mesoporous silica SBA-15 functionalized by triamine (Cu@SBA-3). Several parameters which influence the reduction reaction such as the mass of catalyst, the nature of catalyst, the concentration of NaBH4 and the concentration of MB were investigated. The results showed that the material containing higher content and finer sizes of CuNPs was the best catalyst (Cu@SBA-3) for the reduction of MB dye. This catalyst showed a complete conversion of MB to Leuco-MB in a reaction time which does not exceed 3 min. The application of the catalyst Cu@SBA-3 for the reduction of OG dye in a simple and binary system (OG + MB) has shown encouraging results with selectivity via the MB dye. Lastly, the reuse of this catalytic system has shown interesting results during five successive cycles thus, confirming its stability.

Development of an automated yeast-based spectrophotometric method for toxicity screening: Application to ionic liquids, GUMBOS, and deep eutectic solvents

Saccharomyces cerevisiae has been used as a eukaryotic model organism for studying the toxic effects of various compounds. In this context, an automated spectrophotometric method based on the enzymatic reduction of methylene blue dye to a colorless product by living yeast cells was implemented in a sequential injection analysis system. Loss of yeast viability/impaired metabolic activity was monitored by an increase in optical density at 664 nm. To prove the usefulness of this approach, the toxicity of ILs (ionic liquids), GUMBOS (group of uniform materials based on organic salts), and DESs (deep eutectic solvents) was examined. Differences obtained between IC50 values confirmed the impact of structural elements on each compounds’ toxicity. While DESs appeared to be less toxic than ILs, GUMBOS were found to be among the most toxic compounds to yeast cells and thus can be viewed as promising antimicrobial candidates. The automated methodology showed satisfactory repeatability and reproducibility (RSD < 9%), which is in good agreement with Green Chemistry principles. In fact, the method required consumption of only 40 μL of reagents and produced less than 2 mL of effluents per cycle. Thus, the developed assay can be used as an alternative tool for toxicity screening.

The bifunctional performance analysis of synthesized Ce doped SnO2/g-C3N4 composites for asymmetric supercapacitor and visible light photocatalytic applications

Cerium (Ce) doped SnO2/g-C3N4 composites were synthesized by a facile hydrothermal method. The obtained Ce doped SnO2/g-C3N4 composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–visible spectroscopy (UV–Vis), scanning electron microscope (SEM), energy dispersive spectra (EDS), elemental mapping and X-ray photoelectron spectroscopy (XPS). An electrode made of Ce doped SnO2/g-C3N4 exhibited a maximum specific capacitance of 274 F/g at 1 A/g current density. The supercapacitor device fabricated by using Ce-SnO2/g-C3N4//Activated Carbon as electrodes has showed an energy and power densities of 39.3 W h kg−1 and 7425 W kg−1. The asymmetric device gives the retention of 84.2% after completing 5000 cycles. When the same, Ce-SnO2/g-C3N4, composite is used as a photo-catalyst for reduction of methylene blue dye under visible light irradiation, exhibits a higher degradation efficiency of 98% which is higher efficiency compared to all other synthesized samples.

Catalytic degradation of methylene blue using silver nanoparticles synthesized by honey.

This investigation displayed the good catalytic activity of silver nanoparticles (AgNPs) on the reduction of methylene blue dye. During this work, Honey was chosen for environmentally reducing and stabilizing agents for preparation of silver nanoparticles then characterized these nanoparticles by ultraviolet–visible spectroscopy (UV–Vis), functional biomolecules were confirmed by Fourier transform infrared spectroscopy (FTIR). Via transmission electron microscopy (TEM), the size and shape of silver nanoparticles revealed that the particles are spherical and monodispersed without major agglomeration, the particle size ranging from 5 to 25 nm, in addition, the largest particle density levels are 5–10 nm, ZETA Seizers studied the size distribution of the colloidal solution. UV/Vis spectrophotometer and HPLC were used to study and analyze the degradation performance of silver nanoparticles on methylene blue. The results show that 92% of methylene blue has been degraded after 72 h. additionally, several new peaks have appeared after treatment of the samples by using HPLC.

Catalytic Reduction of Methylene Blue Dye by Copper Oxide Nanoparticles

In this paper, the precipitation method was used to synthesize CuO nanoparticles (NPs). Sodium dodecyl sulfate (SDS) and Cetyltrimethylammonium Bromide (CTAB) were used as a surfactant to modify the surface morphology of the CuO NPs. To investigate the characteristics of the CuO NPs, X-ray diffraction technique (XRD), X-Ray photoelectron spectrometry (XPS), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and Energy dispersive X-ray analysis (EDAX) were used. The catalytic activities of as prepared CuO NPs were evaluated by monitoring reduction of MB dye in the presence of NaBH4 as reducing agent. Effect of catalyst mass, concentration of NaBH4 and concentration of MB dye were investigated. The best results for the reduction of MB dye were obtained by the CuO–SDS catalyst. The results showed that 10 min of reaction time was sufficient to have the total degradation of MB dye. The reuse of the CuO–SDS catalyst for five cycles has shown interesting results via the reduction of MB dye without losing its effectiveness.

Characterization of gold nanoparticles synthesized from Solanum torvum (Turkey Berry) fruit extract and its application in catalytic degradation of methylene blue and antibacterial properties

Contamination of water resources by various pollutants like organic dyes, pesticides, organometallic compounds, and Antimicrobial Resistance (AMR) of various micro-organisms against different antibiotics, drugs are two of the major challenges the world is facing today. Various physical and chemical techniques like sedimentation, oxidation, adsorption, etc. have been used for decontamination of water but these processes are costly, energy consuming and require chemicals. Green synthesized gold nanoparticles (AuNPs) because of their large surface area, unique optical and electronic properties, simple synthesis procedure and ability to absorb a broad range of wavelength can provide a way forward. Another important feature of these nanoparticles (NPs) is their antimicrobial behaviour against pathogenic bacteria. In the present study, AuNPs were biosynthesized using Solanum torvum extract (ST extract) and various parameters like shape, size and stability were characterized via Ultraviolet–Visible (UV–Vis) spectroscopy, High resolution transmission electron microscopy (HRTEM), Dynamic light scattering (DLS) and Zeta potential techniques. The Fourier Transform Infrared (FTIR) studies specify the presence of –OH functional groups as capping agents in the plant mediated synthesis. The Energy-Dispersive Spectroscopy (EDX) analysis confirmed the occurrence of elemental gold signals. The green synthesized AuNPs had predominantly spherical shape, high stability with different kinds of organic molecules bound to its surface. The gold nano-spheroids displayed efficient catalytic potential in the reduction of Methylene Blue dye along with an enhanced performance against bacterial microorganisms.