Borohydride Reduction Method Research Articles

Removal of metoprolol from water by sepiolite-supported nanoscale zero-valent iron

The presence of β-blockers (i.e. metoprolol (MPL)) as an emerging contaminant in aquatic environments has become a subject of concern because of their high solubility in water, consumption, and persistence. In this study, metoprolol was removed from water with sepiolite-supported nanoscale zero-valent iron (SPT-nZVI) to prevent agglomeration and provide a large reactive area. The SPT-nZVI was synthesized using the sodium borohydride reduction method and characterized by various techniques including Fourier-Transform infrared spectroscopy (FTIR), x-ray diffraction spectrometry (XRD), transmission electron microscope (TEM), scanning electron microscopy (SEM), and energy dispersive x-ray spectroscopy (EDAX). The selected parameters of solution pH, contact time, H2O2 concentration, initial MPL concentration, and dosage of nanoparticles were investigated and optimized. The results indicated that the maximum MPL removal rates in the absence and presence of water anions and cations were 67.24%±0.95 and 55.16%±1.26, respectively, obtained under optimal conditions including an MPL concentration of 3mg/L, 10mM H2O2, SPT-nZVI dosage of 0.5g/L, solution pH of 3, and contact time of 60min. Kinetics study indicated that the removal of metoprolol was best fitted with the pseudo-second order model (R2=0.9907). Hydroxyl radical production was successfully verified through the scavenging effect of methanol.

Fabrication of cost-effective non-noble metal supported on conducting polymer composite such as copper/polypyrrole graphene oxide (Cu2O/PPy–GO) as an anode catalyst for methanol oxidation in DMFC

Cost-effective non-noble metal catalysts are of key significance to the successful use of direct methanol fuel cells (DMFCs) for electricity generation. Herein, cuprous oxide nanoparticles (Cu2O NPs) supported graphene oxide (GO), polypyrrole (PPy) and polypyrrole–graphene oxide (PPy–GO) matrices were prepared using borohydride reduction method. The prepared catalysts were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis spectra, Zeta potential and transmission electron microscopy (TEM). The elemental analysis of the composites was done by energy dispersive X-ray spectroscopy (EDX). Cu2O NPs were homogeneously dispersed and strongly anchored on the PPy grafted GO matrix and this was examined through morphological analysis. The Cu2O/PPy–GO (80:10:10) NPs exhibited noticeable improvement in electrochemical performance in comparison to pure graphene oxide (GO) and pure PPy supported Cu2O NPs catalyst and revealed the peak current density of 300 μA cm−2 at +0.68 V. The Cu2O/PPy–GO system demonstrated higher current density and also exhibited greater stability in comparison to the commercial Pt–Ru/C catalyst as characterized by chronoamperometry (CA) analysis. This prospective nano-catalyst showed higher IF/IB ratio (26%, 8.6% and 19%) compared to the corresponding catalyst systems of Cu2O/GO, Cu2O/PPy and Pt–Ru/C. In direct methanol fuel cell (DMFC), the efficiency of Cu2O/PPy–GO nano-catalyst system as an anode catalyst for methanol oxidation reaction (MOR) was investigated and the result revealed a maximum current density of 155 mA cm−2 at +0.2 V and power density of 31 mW cm−2. Hence, Cu2O/PPy–GO NPs are a cost-effective alternative for Pt–Ru/C system to execute practical application in DMFC.

Influence of Ni doping on PtNi nanoparticles: Synthesis, electronic/atomic structure and photocatalyst investigations

Carbon-supported Pt and PtNi nanoparticles (NPs) were synthesized using a borohydride reduction method. Structural properties were studied by synchrotron X-ray diffraction (XRD) and the size/shape of the NPs was determined by transmission electron microscope (TEM). X-ray absorption spectroscopy with its two amendments; X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), has been employed to investigate the local electronic/atomic structure surrounding the Pt and Ni atoms. XANES results, at Pt L3-edge and Ni K-edge, have shown fractional oxidation of Pt and Ni atoms. The Pt3Ni1NPs have exhibited a lower bond distance of Pt–Ni shell and higher coordination number of Pt–Ni shells, indicating the alloy formation between Pt and Ni. We further have demonstrated that the Pt and PtNi NPs can serve as effective photocatalysts towards the degradation of water pollutant dye (methyl orange (MO)). By considering the interband charge-transfer of Pt (5d →6sp), a tentative mechanism is proposed to understand the photocatalytic degradation of MO dye molecules by Pt/PtNi NPs under the light irradiation.

Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes.

Direct methanol fuel cells (DMFCs) are electrochemical devices that efficiently produce electricity and are characterized by a large flexibility for portable applications and high energy density. Methanol crossover is one of the main obstacles for DMFC commercialization, forcing the search for highly electro-active and methanol tolerant cathodes. In the present work, carbon-supported Pd and PdFe catalysts were synthesized using a sodium borohydride reduction method and physico-chemically characterized using transmission electron microscopy (TEM) and X-ray techniques such as photoelectron spectroscopy (XPS), diffraction (XRD) and energy dispersive spectroscopy (EDX). The catalysts were investigated as DMFC cathodes operating at different methanol concentrations (up to 10 M) and temperatures (60 °C and 90 °C). The cell based on PdFe/C cathode presented the best performance, achieving a maximum power density of 37.5 mW·cm−2 at 90 °C with 10 M methanol, higher than supported Pd and Pt commercial catalysts, demonstrating that Fe addition yields structural changes to Pd crystal lattice that reduce the crossover effects in DMFC operation.

Effect of pH, temperature, humic acid and coexisting anions on reduction of Cr(Ⅵ) in the soil leachate by nZVI/Ni bimetal material

Nano zero valent iron/Ni bimetal materials (nZVI/Ni) were prepared by borohydride reduction method to remediate toxic Cr(Ⅵ) contaminated in soil leachate. nZVI/Ni was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). Different factors including pH value of soil leachate, reaction time, temperature, humic acid and coexisting anions (SO42-, NO3−, HCO3−, CO32-) were studied to analyze the reduction rate. Results showed that the reduction rate of Cr(Ⅵ) could reach 99.84% under the condition of pH of 5 and temperature of 303 K. pH values and temperature of soil leachate had a significant effect on the reduction efficiency, while humic acid had inhibition effect for the reduction reaction. SO42-, HCO3− and CO32- had inhibition effect for reduction rate, while NO3− barely influenced the reduction process of nZVI/Ni. Moreover, Langumir-Hinshelwood first order kinetic model was studied and could describe the reduction process well. The thermodynamic studies indicated that the reaction process was endothermic and spontaneous. Activation energy was 143.80 kJ mol−1, showing that the reaction occurred easily. Therefore, the study provides an idea for nZVI/Ni further research and practical application of nZVI/Ni in soil remediation.

Catalytically active highly metallic palladium on carbon support for oxidation of HCOO−

Catalytically active highly metallic palladium (A-I-Pd/C) catalyst for oxidation of formate (HCOO−) was synthesized via borohydride reduction method assisted by ammonia and iodine ion. The physico-chemical characterizations were conducted to investigate properties of the synthesized catalysts and we confirmed A-I-Pd/C is consisted with palladium hydride. The catalytic activity of the catalysts for oxidation of HCOO− are characterized by electrochemical analysis and A-I-Pd/C catalysts performed the best catalytic activity for oxidation of HCOO− in terms of Tafel slope and onset potential. The enhanced catalytic activity of A-I-Pd/C is explained by enhanced kinetics of oxidation of Hads, which is caused by weaken adsorption strength of Hads on Pd due to electron transfer from H to Pd. The enhanced performance of A-I-Pd/C was also confirmed and compared with the others in a single cell system.

Preparation and characterization of bismuth oxichloride (BiOCl) nanoparticles and nano zerovalent iron (nZVI)

In this work, we have synthesized nano scale zerovalent iron (nZVI) particles by borohydride reduction method and bismuth oxichloride (BiOCl) by a hydrolysis method. X-ray powder diffraction (XRD) was used for the structural and chemical characterization, while scanning/transmission electron microscopy (SEM/TEM) were employed to determine the physical properties of the nanoparticles. The reactivity of synthesized nanoparticles was compared by decolorization of nile blue (NB) dye under visible irradiation.

A comparative study of electrocatalytic performance of the M@Pt (M = Fe3O4, Co and Ni) nanoparticles for direct ethanol fuel cells

In this study, we have successfully synthesized the M@Pt (M = Fe3O4, Co and Ni) nanoparticles catalysts through the sodium borohydride reduction method for a comparative studies of their electrocatalytic performance towards ethanol oxidation in acidic media. After the structure, surface morphology and chemical composition characterization of the synthesized core–shell nanoparticles, their electrocatalytic activities towards oxidation of ethanol in acidic media were studied in detail. We investigated the effect of the core element (Fe3O4, Co and Ni) on the electrochemical behaviour as well as the enhancement of the electrocatalytic activity for ethanol oxidation reaction. Overall, the obtained results show that the all of these electrocatalysts exhibited an enhanced activity than Pt-alone nanoparticles towards ethanol oxidation reaction. On the other hand, the comparative studies of their electrocatalytic performance show that the Ni@Pt nanoparticles present the best performance with the maximum electrocatalytic activity and stability.

Effect of the Dendrimer Generation Used in the Synthesis of Pt-Ru Nanoparticles Supported on Carbon Nanofibers on the Catalytic Activity towards Methanol Oxidation

Pt-Ru nanoparticles supported on carbon nanofibers (CNF) were synthesized by the sodium borohydride reduction method, using different generation dendrimers (zero, one, two and three generations). After the synthesis process, these materials were submitted to a heat treatment at 350 °C, in order to clean the nanoparticle surface of organic residues. TEM characterization showed that the Pt-Ru nanoparticles size ranged between 1.9 and 5.5 nm. The use of dendrimers did not totally avoid the formation of aggregates, although monodisperse sizes were observed. The heat treatment produces the desired surface cleaning, although promoted the formation of agglomerates and crystalline Ru oxides. The study of the electrochemical activity towards the methanol oxidation displayed some clues about the influence of both the dendrimer generation and the presence of Ru oxides. Moreover, the apparent activation energy Eap for this reaction was determined. The results showed a beneficial effect of the heat treatment on the methanol oxidation current densities for the materials synthesized with the biggest dendrimers, being the methanol deprotonation and COad diffusion the predominant rate determining steps (rds).

Monodisperse Pt nanoparticles anchored on N-doped black TiO2 as high performance bifunctional electrocatalyst

Nitrogen-doped black TiO2 (Nx:TiO2−x) recently attracted attention as a novel photocatalyst. It has higher electrical conductivity and more suitable energy level for oxygen reduction and hydrogen evolution than pure TiO2 due to the presence of Ti3+ species. The unique electronic structure and strong metal-support interaction make it a candidate support for Pt-based electrocatalyst. Carbon is universal as support of Pt-based electrocatalyst. However, it is restricted to the poor durability and bad methanol tolerance. On the contrary, the chemical stability of nitrogen-doped TiO2 contributes to the higher durability and methanol tolerance of Pt/Nx:TiO2−x than Pt/C catalyst. Monodisperse Pt nanoparticles are loaded on Nx:TiO2−x by a facile borohydride reduction method. The Pt/Nx:TiO2−x hybrid shows better oxygen reduction reaction (ORR) activity with the half wave potential of 0.78 V (vs. reversible hydrogen electrode) than Pt and good hydrogen evolution reaction (HER) performance with 19 mV onset overpotential, similar to Pt/C catalyst. More importantly, Pt/Nx:TiO2−x catalyst has robust durability and higher methanol tolerance than Pt/C catalyst. All these electrostatic performances stem from the suitable energy level for ORR and HER and the strong interaction between Pt and Nx:TiO2−x support. This hybrid material is a promising candidate for the fuel cell in the future.

Synthesis and Characterization of Silver Nano Particles for EDM Applications

Over the past few decades, nano particles research of noble metals such as silver exhibited as an intense area of scientific interest due to their significantly distinct applications in biomedical, optical and electronic fields from their bulk counterparts because of their smaller particle size, higher surface area and various other effects. These silver nano particles can be synthesized by various methods: Reduction either by using Citrate or Sodium Borohydride, Ion Implantation and Biogenic Synthesis. Amongst these, Sodium Borohydride is used in excess for reduction of silver nitrate and stabilize the silver nano particles. Sodium Borohydride being a strong reducing agent may lead to secondary reaction. An ice bath facilitates to slow down the reaction rate and eliminates secondary reactions. If agglomeration of nano particles occurs, PVP is added during reaction. To characterize the nano particles Ultraviolet Visual Spectroscopy, Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) can be employed. Borohydride reduction method produces 30-100 nm particles.

PtNi and PtMo nanoparticles as efficient catalysts using TEA-PS.BF4 ionic liquid as electrolyte towards HER

Carbon-supported bimetallic nanoparticles, PtNi/C and PtMo/C, were synthesized using the borohydride reduction method and were tested as cathode in the hydrogen evolution reaction (HER) employing acid aqueous solution of 3-triethylammonium-propanesulfonic acid tetrafluoroborate (TEA-PS.BF4) ionic liquid as the electrolyte. For comparison a commercial carbon-supported Pt nanoparticles (Pt/C) has been tested. The morphology, composition and structure of the carbon-supported nanoparticles were characterized by EDX, XRD, and TEM. The results obtained by chronoamperometry, Tafel plots and electrochemical impedance spectroscopy (EIS) exhibited an excellent catalytic effect and the same kinetics mechanism for all carbon-supported nanoparticles in HER studied. Results of Tafel analysis showed that the HER rate determining step is the Volmer–Heyrovsky mechanism. In the temperature range 25–80 °C, the PtNi/C and PtMo/C cathodes presented lower activation energy and higher current density than system using the Pt/C cathode. The PtMo/C cathode improves charge transfer kinetics and hydrogen adsorption, while the PtNi/C cathode facilitates the desorption step. These results demonstrate that the carbon-supported bimetallic nanoparticles PtNi/C and PtMo/C are responsible for increasing the catalytic performances of the HER when TEA-PS.BF4 aqueous solution is employed as electrolyte.

Performance of Pd Electrocatalyst Supported on a Physical Mixture Indium Tin Oxide–carbon for Glycerol Electro–oxidation in Alkaline Media

AbstractPalladium electrocatalysts, supported on Vulcan XC 72 carbon and indium tin oxide (ITO) with different ratios, were prepared by borohydride reduction method and analysed for glycerol electro‐oxidation application in the presence of KOH solution. Transmission electron microscopy (TEM) and X‐ray diffraction (XRD) techniques were used to characterize the particle size and crystal electrocatalyst structures, whereas their catalytic activities regarding the glycerol electro‐oxidation were evaluated by cyclic voltammetry (CV), chronoamperometry and tested in a direct alkaline glycerol fuel cell (DGFC) by electrochemical techniques. Micrographs results showed that the ITO presence promotes a large agglomeration of particles. Pd/C–ITO electrocatalysts showed peaks associated with the face‐centered cubic (fcc) structure of palladium and several others peaks associated with ITO used as support. Similar performance was found on all Pd/C–ITO electrocatalysts where measurements in CV were compared to Pd/C and Pd/ITO with Pd/C–ITO 50:50 chronoamperometry, presenting a better performance for glycerol electro‐oxidation. When using Pd/C–ITO 85:15 electrocatalyst and 1.0 mol L−1 glycerol at 90 °C, the maximum power density found was 2,1 times higher than that obtained using Pd/C and Pd/CITO electrocatalysts. Therefore, the physical mixture of ITO and carbon, to be used as a support improves the electrocatalytic activity for glycerol oxidation reaction.

The influence of noble metals on photocatalytic activity of ZnO for Congo red degradation

The most suitable method to improve the photocatalytic activity of semiconductors is doping of noble metallic nanoparticles on them. In this research, Au, Ag and Pd noble metals were separately doped on ZnO nano photocatalysts by borohydride reduction method. The as-prepared doped on ZnO nano photocatalysts were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), inductively coupled plasma optical emission spectroscopy (ICP-OES), ferromagnetic resonance (FMR) and UV–Vis diffuse reflectance/absorbance spectroscopy (DRS). The photocatalytic activities of nano photocatalysts were evaluated by the degradation of Congo red (CR) dye under UV irradiation. It was found that noble metals doped ZnO nano photocatalysts could significantly increase the photocatalytic activity of ZnO. When we compared the enhancing effects of Au, Ag and Pd, it was found that Pd was more effective than others. The differences in activities of various noble metals doped ZnO may be related differences in the amount of reducing noble metals, in their work functions and in their heights of Schottky barriers. The results of these studies demonstrate that doping of noble metals on ZnO can delay significantly the recombination process of the electron–hole pairs generated by the photon absorption and consequently improve the photocatalytic activity of the ZnO.

Synthesis, characterization, and biological activity of cross-linked chitosan biguanidine loaded with silver nanoparticles

Chitosan biguanidine hydrochloride (ChG) and glutaraldehyde cross-linked chitosan biguanidine (CChG) were synthesized and characterized by Fourier transform infrared spectroscopy, 1H NMR and 13C NMR, X-ray diffraction, scanning electron microscopy (SEM) and thermal analyses (TGA and DTA). The results showed that ChG and CChG had a more amorphous structure than that of chitosan, and their thermal stability were slightly lower than that of chitosan. Colloidal silver nanoparticles (AgNPs) were prepared using borohydride reduction method and then investigated as fillers in partially cross-linked chitosan biguanidine. The obtained nanoparticles were uniform and spherical with average size of 9.6 ± 0.5 nm. The prepared CChG/AgNPs composites were characterized for their morphology, thermal properties, cytotoxicity and antimicrobial activity. The SEM images showed that the AgNPs are well imbedded in the CChG matrix. The thermal stability of CChG was improved with incorporation of AgNPs. The CChG and CChG/AgNPs showed less cytotoxicity to breast cancer cells (MCF-7). Compared with chitosan and CChG, the ChG and CChG/AgNPs showed better antimicrobial activity against Streptococcus pneumoniae and Bacillus subtilis as Gram-positive bacteria, Escherichia coli as Gram-negative bacteria and Aspergillus fumigatus, Geotricum candidum and Syncephalastrum recemosum as fungi.

Glycerol and Methanol Electro‐oxidation at Pt/C‐ITO under Alkaline Condition

AbstractA physical mixture composed by carbon Vulcan XC 72 and indium tin oxide (ITO) with different ratios (85 : 15; 50 : 50; 85 : 15) was used as support for platinum nanoparticles synthesis by borohydride reduction method. The characterization of this electrocatalyst was performed by transmission electron microscopy (TEM), X‐ray diffraction (XRD), electrochemical techniques cyclic voltammetry (CV), chronoamperometry and performance test on direct alkaline glycerol/methanol fuel cell (DGFC/DMFC). According to TEM micrographs, Pt/C‐ITO nanoparticles analysis revealed the presence of large agglomerations of particles. Moreover, it was possible to observe Pt deposition on ITO and also in the carbon surface. The electrochemical studies showed that Pt/C‐ITO (85 : 15) had superior performance for glycerol electro‐oxidation, whereas Pt/C‐ITO (15 : 85) was the most promising in the methanol oxidation. A comparative study using direct alkaline fuel cells revealed Pt‐C‐ITO (15 : 85) electrocatalyst to be the best material for glycerol and methanol oxidation, specifically when being at open circuit potential about 0.95 V, maximum power density of 16 mW cm−2 for glycerol and circuit potential 0.95 V, and maximum power density of approximately 20 mW cm−2 for methanol.

Tuning the Shape Anisotropy and Electromagnetic Screening Ability of Ultrahigh Magnetic Polymer and Surfactant-Capped FeCo Nanorods and Nanocubes in Soft Conducting Composites.

Herein, we demonstrate that very high electromagnetic (EM) shielding efficiency can be achieved by dispersing nanoengineered FeCo anisometric nanostructures in a poly(vinylidene difluoride) matrix in the presence of conductive nanofillers (multiwall carbon nanotubes, MWCNTs). The FeCo nanorods (∼800 nm) and nanocubes (∼100 nm) were fabricated by a facile surfactant and polymer-assisted one-pot borohydride reduction method. The growth mechanism depicted a two-directional growth for cubes, whereas for nanorods, a unidirectional growth pattern across the (110) plane was evident. A total shielding effectiveness (SET) of -44 dB at 18 GHz was achieved for a particular combination of FeCo nanorods and MWCNT, and for nanocube-based composites, it was found to be -39 dB at 18 GHz. It was observed from zero field cooled-field cooled curves that the samples displayed room temperature ferromagnetism. An excellent correlation between high aspect ratio FeCo nanorod and superior EM absorption (89%) was explored, pertaining to the fact that nanorods possessed higher magnetic saturation (177.1 emu/g) and coercivity (550 Oe) in contrast to the nanocubes with similar composition. Furthermore, theoretical insight into the mechanism revealed a high degree of interface scattering between conductive MWCNT and magnetic loss components, giving rise to an excellent synergy between magnetic and dielectric parts.

Carbon supported Ag and Ag–Co catalysts tolerant to methanol and ethanol for the oxygen reduction reaction in alkaline media

Ag/C and Ag–Co/C catalysts with high activity towards the oxygen reduction reaction in alkaline media, different metal loadings and average sizes below 20 nm were synthesized by glycerol and borohydride reduction methods without stabilizers. Physicochemical characterization of the materials was performed by X-ray techniques (diffraction, energy dispersive and photoelectron spectroscopy) and transmission electron microscopy. Well dispersed small nanoparticles were obtained in all cases, mainly formed by Ag(0). For Ag–Co/C catalyst, it was observed that Co was not alloyed but presented as cobalt oxides. The electrocatalytic activity towards oxygen reduction reaction (ORR) in alkaline solution was evaluated by cyclic voltammetry and rotating disk techniques. A four electron transfer mechanism was established although increasing Ag loading produces a decrease of this number, indicating that hydrogen peroxide produced as intermediate in a first two electron step was not completely reduced. Alcohol tolerance of the catalysts was also established in methanol and ethanol solutions. Materials were not active for the electro-oxidation of alcohols, although it was observed that both methanol and ethanol were adsorbed on the catalyst. Highest activity and alcohol tolerance was observed for the 60 wt.% Ag loading material. Also the introduction of Co produces an increase in the activity (higher ORR limiting currents) and in the alcohol tolerance. In comparison to Pt and Pd, Ag and Ag–Co present more appropriate activities for ORR when alcohol tolerance is considered, being good candidates for the use as catalysts in alkaline direct alcohol fuel cells.

Synthesis and evaluation of CO electro-oxidation activity of carbon supported SnO2, CoO and Ni nano catalysts for a PEM fuel cell anode

Fuel contaminants especially CO which have poisoning effect on anodic catalysts, are the main barriers to commercialization of PEM fuel cell technology. Many efforts have been done to discount the CO poisoning effect on anodic catalysts. The non-noble metal elements capability for CO electro-oxidation per-se has not been fully evaluated. In this paper, properties of non-noble metal catalysts for CO electro-oxidation were studied. To do this, carbon supported nano-catalysts of SnO2, Ni and CoO were synthesized via the borohydride reduction method. Their electrochemical activity for CO electro-oxidation was evaluated in an in-house made half-cell using a new electrochemical test procedure based on recording CV current under continuous CO gas flow over the catalyst surface. Then, electrochemical tests on the synthesized catalysts and commercial Pt20/C were performed. The max current charge obtained from CO electro-oxidation with commercial Pt20/C was 13,200 μA per mg of metal at 0.74 V and for SnO2/C, CoO/C and Ni/C were 630, 450 and 140 μA per mg of metal, respectively. These amounts were obtained at 0.58, 0.43 and 0.26 V. Results proved the capability of CoO/C and SnO2/C to perform the CO electro-oxidation reaction at low potentials in a PEM fuel cell anode condition.

Kinetic and Thermodynamics of Methylene Blue Adsorption onto Zero Valent Iron Supported on Mesoporous Silica

Zero valent iron supported on mesoporous silicanano particles (NZVI/MSNs) was prepared by the aqueous phase borohydride reduction methods. Prior to the reduction, mesoporous silica nanoparticles (MSNs) were prepared through the activation of fumed silica with concentrated HCl by refluxing at 90 °C. FTIR, XRD, FESEM, EDX and BET were used to characterize theadsorbents prepared. BET surface areas of MSNs, NZVI, and NZVI/MSNs were 126, 41, and 72 m2/g for, respectively. The performance of NZVI/MSNs as adsorbent was examined by adsorption of methylene blue (MB), performed in series of batch experiments. In the kinetic studies, pseudo first order and pseudo second order kinetic models were examined. The pseudo second order equation provided the best fit with the experimental data. Thermodynamic studies indicated that the adsorption process is endothermic with ΔH° was 90.53 kJ/mol. Positive ΔS° (300 J/mol) and negative ΔG° (-6.42 kJ/mol) was recorded, indicating the spontaneous of the adsorption process and naturally favorable.