Effect Of Fe Doping Research Articles

Anatase to rutile phase transformation of iron-doped titanium dioxide nanoparticles: The role of iron content

Abstract Control of the conditions that affect the formation of the anatase and rutile phases of TiO2 is of considerable interest. The aim of this work was to study the effect of Fe doping on the anatase to rutile transformation for the TiO2:Fe3+ samples not undergo annealing at high temperatures. In the hope of increasing photocatalysis efficiency, the decrease of TiO2 band-gap energy caused by Fe doping was studied. The Fe3+-doped TiO2 (TiO2:Fe3+) nanoparticles with dopant contents ranging from 0 to 14.54 at% have been synthesized by hydrothermal method. Different techniques such as transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Raman scattering, diffuse reflection and photoluminescense spectroscopy were used to characterize the synthesized nanoparticles. The results showed that the increase of Fe3+ dopant content up to 9.29 at% leaded to the anatase to rutile phase transformation. The Fe-doping resulted in the shifting and broadening of the Raman modes, and the red shift of the absorption edge of the TiO2:Fe3+ nanoparticles as well. The band gap energy decreased from 3.57 to 3.06 eV for the direct and from 3.21 to 2.14 eV for indirect transitions with increasing Fe3+-doping concentration from 0 to 14.54 at%. In addition, the presence of Fe3+ dopant affected the photoluminescence spectra of the nanoparticles.

Photocatalysis-Fenton of Fe-doped g-C3N4 catalyst and its excellent degradation performance towards RhB

A Fe-doped graphite-like carbon nitride (g-C3N4) nanocomposites containing various Fe contents (5 wt.%, 10 wt.% and 15 wt.%) were prepared via two-step calcination thermal polymerization, and were employed as efficient heterogeneous photo-Fenton composites towards rhodamine B (RhB) removal in visible-light/H2O2 system. The sheet structure of g-C3N4 was refined down to nano-scale and less densely packed by the increasing Fe-doping ratio. X-ray diffraction (XRD), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra indicated that Fe was doped completely into the g-C3N4 lattice. Over 90 %RhB was degraded in photo-Fenton system within 45 min under the optimal Fe-doping ratio of 10 wt.% (10 % Fe-g-C3N4). The degradation efficiency of photo-Fenton was superior in comparison with photocatalysis and Fenton reaction. The as-prepared composite exhibited excellent performance (∼90 % removal) and high stability in a wide range of pH value (3∼9), and the degradation data well fitted with the pseudo-first-order kinetics model. The enhanced photo-Fenton catalytic activity benefited from the Z-scheme heterojunctions of Fe-g-C3N4, which improved the separation ability of photo-generated charge carriers and increased the electrons that participated in Fe2+/Fe3+ cycle. The main active oxygen species of Fe-g-C3N4 were hydroxyl radicals, followed by superoxide radicals and electron holes. The effect of Fe-doping was revealed by density functional theory calculation. The excellent recyclability and stability of Fe-g-C3N4 catalyst was also observed. Such photo-Fenton system was also effective to degrade other organic pollutants. The findings reported here offer promising implications in developing the utilization of Fe-g-C3N4 composite in photo-Fenton system for treatment of wastewater.

Martensitic transformation behaviour and mechanical property of dual-phase Ni-Co-Mn-Sn-Fe ferromagnetic shape memory alloys

Ni-Co-Mn-Sn Heusler alloys possess attractive multifunctional properties, owing to the unique metamagnetic shape memory effect. However, the intrinsic high brittleness limits their applications. In this work, we studied the effects of Fe doping and heat treatment on the microstructures, mechanical properties, martensitic transformation and magnetic behaviours of Ni-Co-Mn-Sn-Fe Heusler alloys. A eutectic dual-phase was successfully introduced in Ni48Co4Mn39-xSn9Fex (x = 3, 4, 5, 6, 7 and 8) alloys by doping Fe for Mn. The engineering strength and ductility increased almost by twofold in a eutectic dual-phase alloy compared to the single-phase alloy. Such microstructure also shows a large quasilinear pseudoelasticity of 4.3% with a very small stress hysteresis and good cyclic stability. After the heat treatment, the γ phase lamellae was much coarsened which resulted in decrease of strength and ductility by ~20%. The magnitude of pseudoelasticity decreased to 2.6% and worse cyclic stability occurred because of the grain coarsening. The metamagnetic transformation was obtained when Fe content is between 2.5 at% and 6.5 at%, with Fe3 alloy showing a A(ferro) ⇔ M(para) type and Fe4-Fe6 alloys showing a A(ferro) ⇔ M(ferro) one.

Effect of Fe doping on the magnetic properties of MnBi alloy

Structure and magnetic properties of Fe-doped MnBi alloy with a range of Fe concentrations were systematically investigated. The coercive field and saturation magnetization (Ms) were drastically changed according to the fabrication methods and Fe contents. The addition of Fe element could enhance the coercivity (Hc) of the MnBi-based alloy, and the increased Hc of 1.76 T was reached in the Mn55Bi45-Fe (15 wt%) ball-milled ribbon. Moreover, a high remanence ratio (Mr/Ms) of 97.0% was achieved in the Mn55Bi45-Fe (7.5 wt%) ball-milled ingot. In addition, as the concentration of Fe increases from 0 to 15 wt%, the Curie temperature (Tc) was increased from 635 to 652 K. This demonstrates that Fe-doped MnBi rare-earth permanent magnets could be a promising candidate for high-temperature applications. The relationship between magnetic properties and intermetallic lattice variations were discussed with precise Rietveld refinement analysis.

Enhanced sonophotocatalytic degradation of paracetamol in the presence of Fe-doped TiO2 nanoparticles and H2O2

The presence of pharmaceutical compounds, particularly, paracetamol in water is of significant environmental concern due to their undesirable effects on aquatic organisms and poor biodegradability. The present work investigated the efficient degradation of paracetamol in water using sonophotocatalytic process in the presence of iron (Fe)-doped titanium dioxide (TiO2) nanoparticles. The effects of Fe doping into TiO2 and calcination temperatures were investigated using field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, nitrogen adsorption–desorption analysis and X-ray photoelectron spectroscopy. It was discovered that 3 wt% Fe dopants into TiO2 nanoparticles with suitable calcination temperature at 600 °C could improve the sonophotocatalytic activity remarkably toward the degradation of paracetamol. The degradation efficiency of 100% was achieved under optimal experimental conditions, namely 5 mg/L initial paracetamol, 1 g/L 3 wt% Fe-doped TiO2-600, solution pH of 5, 0.5 mM of hydrogen peroxide (H2O2) after 30-min ultrasonic power of 296 W, ultrasonic frequency of 50 kHz and ultraviolet wavelength of 302 nm. These findings are crucial for designing Fe-doped TiO2 nanoparticles with high catalytic performance for the degradation of paracetamol and appeared as an alternative solution to treat pharmaceutical compounds effectively.

First-principle study on the magnetic and optical properties of TiO2 doped with different valence Fe

The effect of Fe doping with different valence states on the magnetic and the optical properties of rutile TiO2 has not been recognized. This paper adopts the First-principles generalized gradient approximation + U (GGA + U) method. The band gaps of Ti14Fe23+O32 and Ti14Fe22+O32 systems are narrowed compared with those of pure rutile TiO2, and the absorption spectra red-shifted. Holes or electron capture positions are introduced to reduce the probability of the hole–electron pair recombination. The Ti14Fe23+O32 system has narrower band gap, more remarkable red- shift in the absorption spectrum, slower electron and hole recombination, faster separation, and better photocatalytic performance than the Ti14Fe22+O32 system. The semimetallization is performed. P-type dilute magnetic semiconductor with semimetallization is advantageous as a hole injection source. Moreover, the ferromagnetic mechanism can be achieved at room temperature. The Ti14Fe23+O32 system has certain reference value for designing and preparing novel photocatalysts or dilute magnetic semiconductors.

Fe doping effect on the structural, ferroelectric and magnetic properties of polycrystalline BaTi1−xFexO3 ceramics

BaTi1−xFexO3 (x = 0–0.08) ceramics were prepared by conventional solid-state reaction. The Fe doping effect on the structure, electrical and magnetic properties was analyzed. The Fe substitution would reduce the degree of tetragonality and ferroelectricity. The hexagonal phase began to emerge and increased after x = 0.04 by the X-ray diffraction. Meanwhile, ferroelectricity is diminished due to an increase of the non-ferroelectric hexagonal and pinning of domain wall motioned by oxygen vacancies with the increasing Fe substitution. It is found that the nonlinear change of magnetic properties with the increasing Fe concentration. The critical role of the valence state of Fe ions and the accompanied oxygen vacancies on the magnitude of magnetic properties is discussed. Our investigations suggest that the competition of Fe4+–O2−–Fe4+, Fe3+–O2−–Fe4+ and Fe3+–O2−–Fe3+ interaction are coexisted, and the Fe4+–O2−–Fe4+ super-exchange interaction is responsible for the larger magnetism at x = 0.04. From the analyze of XPS spectra, the higher content of Fe4+ and lower oxygen vacancies at x = 0.04 verify that Fe4+–O2−–Fe4+ super-exchange interaction is the origin of larger magnetism.

Microstructural, Electrical, Optical and Magnetic Properties of Fe- and Cu-Doped In1.95Cr0.05O3 Thin Films Synthesised by Sol-Gel Method

In2O3 is multifunctional material with rich physical phenomena. In this paper, effects of Fe and Cu doping on the physical properties of In1.95-xCr0.05MxO3 (M = Fe, Cu) thin films prepared by sol-gel method followed by spin-coating technique were investigated. The films were characterised using X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis spectrophotometer, Hall effect, X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometer. Doping with Cu reduced the lattice parameter and optical transmittance of In1.95-xCr0.05MxO3 films more than that with Fe. In addition, Cu doping induced p-type conductivity in In1.95-xCr0.05MxO3 films. Optical band gap was increased from 3.76 eV for In1.95Cr0.05O3 to ~ 3.8 eV for both Cu- and Fe-doped films, which was attributed to quantum confinement behaviour. Average grain size measured using TEM was reduced from 8.2 nm for In1.95Cr0.05O3 to 6.6 and 5.6 nm for Fe and Cu doped films, respectively. Saturation magnetisation of films was reduced with Fe doping more than that with Cu doping. Magnetic behaviours of films were explained within the framework of bound magnetic polaron model.

Fe-doped zirconia nanoparticles with highly negative conduction band potential for enhancing visible light photocatalytic performance

Maintaining a highly negative value of conduction band (CB) potential of photocatalysts through metal doping has been a great challenge. Herein, we investigated the effects of Fe-doping on the crystal structures and electronic structures of zirconia (ZrO2) in detail by combining experiments and Density Functional Theory (DFT). It was revealed that the Fe-doping obviously triggered the formation of tetragonal phase ZrO2 and induced a defect states in the bandgap of Fe-doped ZrO2. Due to the coherent effect between the electrons of the Fe 3d orbitals and ZrO2 intrinsic electronic states, the defect states expanded the light absorption edge of ZrO2 and Fe-doped ZrO2 showed a small bandgap with maintaining a highly negative value of the CB potential. Meanwhile, Fe-doping significantly enhanced photoelectrochemical properties, the efficiency separation of electron-hole pairs and photocatalytic activity in comparison with the pristine ZrO2. We also found that 0.5%Fe-ZrO2 exhibited the optimum photocatalytic performance, and reached 96% for degradation of Rhodamine B (RhB) within 150 min under visible light irradiation. This work elucidated the mechanism of the photocatalytic degradation of RhB over Fe-doped ZrO2 and provided a promising approach in designing highly negative CB potential of ZrO2 via Fe doping toward sustainable environmental remediation.

Developed photocatalytic semi-flexible pavement for automobile exhaust purification using iron-doped titanium dioxide

To develop a green and sustainable photocatalytic semi-flexible pavement (SFP) for automobile exhaust (AE) purification using the iron (Fe)-doped titaniumdioxide (TiO2) loaded in the adsorbable hardened cement paste of SFP, the effects of Fe doping on microstructure and photoabsorption performances of TiO2 were discussed. Also, the catalytic purification efficiency of Fe-doped TiO2 to AE and its influences on pavement performances of SFP were investigated. Test results indicate that the prepared Fe-doped TiO2 is anatase phase. Fe ions are successfully doped into TiO2, improving its catalytic efficiency when exposed to visible light. The grain size of Fe-doped TiO2 is 14–18 nm. The doped Fe ion inhibits the growth of crystalline grain in TiO2. Also, the photoabsorption edge band shows an obvious red shift from ultraviolet to visible light region. The band gap of TiO2 is obviously decreased by the Fe doping, and the visible light absorbance of TiO2 is increased, improving its utilization efficiency of solar irradiation. Further, the Fe-doped TiO2 shows higher purification efficiency to HC and NOx, following the pseudo-first-order kinetics reaction model. The purification reaction of HC occurs to produce CO2 and H2O. Additionally, the acidulous NOx is easily adsorbed by alkaline cement paste in SFP, enhancing the photocatalytic purification to NOx. NOx is purified to generate nitrate and H2O. However, Fe-doped TiO2 shows unsatisfactory photocatalytic purification efficiency to CO and CO2 due to their reversiblereactions, not following the pseudo-first-order kinetics reaction model. The Fe-doped TiO2 dosage of 8% is proposed to add in cement slurry for prepare photocatalytic SFP. The prepared Fe-doped TiO2 shows slight effects on pavement performances of SFP, and can be used in SFP to develop a new sustainable and green pavement material.

Room Temperature Magnetic Memory Effect in Cluster-Glassy Fe-doped NiO Nanoparticles.

The Fe-doped NiO nanoparticles that were synthesized using a co-precipitation method are characterized by enhanced room-temperature ferromagnetic property evident from magnetic measurements. Neutron powder diffraction experiments suggested an increment of the magnetic moment of 3d ions in the nanoparticles as a function of Fe-concentration. The temperature, time, and field-dependent magnetization measurements show that the effect of Fe-doping in NiO has enhanced the intraparticle interactions due to formed defect clusters. The intraparticle interactions are proposed to bring additional magnetic anisotropy energy barriers that affect the overall magnetic moment relaxation process and emerging as room temperature magnetic memory. The outcome of this study is attractive for the future development of the room temperature ferromagnetic oxide system to facilitate the integration of spintronic devices and understanding of their fundamental physics.

Systematic effects of Fe doping on the activity of V2O5/TiO2-carbon nanotube catalyst for NH3-SCR of NOx

The present investigation concentrates on the reduction of NOx emissions, the indirect greenhouse gases, which generate ozone by reacting with the atmosphere. A series of composite catalytic support (TiO2-CNTs) with a constant TiO2-CNT ratio prepared by precipitation method was utilized to synthesize Fe-modified V2O5/TiO2-CNT catalyst for selective catalytic reduction (SCR) of NOx with ammonia (NH3). The structural and surface characteristics of the prepared catalyst were investigated by using Brunauer–Emmett–Teller surface area measurement, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, and temperature-programmed desorption (TPD) techniques. In terms of catalytic activity, VFe3TiC10 catalyst showed better SCR performance having a NOx conversion efficiency of 95% and 98% at 250 °C and 300 °C, respectively. The improved performance could be attributed to high surface chemisorbed oxygen on the surface of the catalyst by the added Fe species which promotes the SCR activity. The catalytic activity results depicted that the addition of CNTs to TiO2 support enhanced the SCR activity of the catalyst at low reaction temperatures and it also provides better resistance to SO2. In addition, the effects of Fe modification on the NH3 removal efficiency of the catalyst were also investigated.

Influence of Fe-doping amounts on magnetocaloric properties of Gd-based amorphous microfibers

The effects of trace Fe-doping on the magnetic and magnetocaloric performances of Gd-based metallic microfibers were systematically and detailedly investigated in this article. Experimental results indicated that the Gd-based microfibers prepared by the rotated-dipping process are uniform and continuous, with typically amorphous structure characteristics and favorable thermal stability. Curie temperature TC of Gd-based amorphous microfibers increases with the rising of Fe content, and the TC of GdAlCoFe3 microfibers is the highest at 128.7 K (relatively increased by 15.3 K than before doping). Among the general magnetic performance indicators, the saturation magnetization Ms of GdAlCoFe2 microfibers reaches a peak at 264.04 emu/g. Furthermore, the values of magnetocaloric performance indexes of Gd-based amorphous microfibers increase firstly and then decrease with the rising of Fe-doping amount. When the external magnetic field Hex = 50,000 Oe, the maximum magnetic entropy change -ΔSmmax, refrigeration capacity RC and relative cooling power RCP of GdAlCoFe1 microfibers are 10.33 J/kg·K, 748.22 J/kg and 1006.90 J/kg, which increased by 0.07 times, 0.13 times and 0.16 times, respectively than before Fe-doping (namely -ΔSmmax = 9.68 J/kg·K, RC = 663.79 J/kg, RCP = 871.73 J/kg). From the perspective of microstructural changes, Fe-doping results in the formation tendency of atomic clusters and nanocrystals in micro-regions, the orderly orientation of atoms appears, and the magnetic anisotropy increases accordingly. In addition, the 3d electron layer of the doped Fe element in Gd-Al-Co-Fe quaternary alloy system enhances the RKKY indirectly exchange coupling interaction and changes the state of magnetic entropy, which in turn leads to an increase in Curie temperature and an improvement in magnetocaloric performance. Since RC and RCP are the main indicators in engineering applications, the GdAlCoFe1 amorphous microfibers can be selected as a low-temperature magnetic refrigeration working medium to provide technical guarantee for the application of magnetic refrigeration technology.

The effect of Fe dopant on structural, optical properties of TiO2 thin films and electrical performance of TiO2 based photodiode

Abstract Herein, TiO2 heterojunctions were fabricated by sol gel spin coating technique as a function of Fe doping. The effect of Fe doping on the optical, structural, morphological properties of TiO2 thin films and electro-optical properties of their photodiode applications have been investigated. The XRD results have not showed peaks, which implies that the all films are amorphous. The E g values of thin films decreased with increasing Fe concentration. As result of I − V measurements of diodes under dark and light conditions, all diodes demonstrated photo characteristic behavior. The barrier height values of diodes varied between 0.68 eV and 0.70 eV. The lowest ideality factor was obtained from 2% Fe: TiO2/p-Si diode and was found to be 4.75. The highest photosensitivity of 1.53 × 104 was obtained from 6% Fe: TiO2. In addition, the C − V , G − V and R s − V measurement were taken at different frequencies and analyzed. Moreover, the obtained results showed that the performances of fabricated diodes could be governed by the Fe doping.

Synergistic heat treatment derived hollow-mesoporous-microporous Fe–N–C-SHT electrocatalyst for oxygen reduction reaction

Abstract Exploring an economical and efficient oxygen reduction reaction (ORR) is an essential but challenging field of study. Metal–organic frameworks (MOFs) have emerged as promising candidates for the preparation of porous catalysts. Here we propose a synergistic heat treatment (SHT) method to synthesize Fe–N–C-SHT catalyst with hierarchical porous hollow structures via a simple carbonization method by the synergistic heating of ZIF-8-Fe (ZIF-8 doped with Fe) and ZIF-67 in a tube furnace. Fe–N–C-SHT catalyst displays efficient ORR activity (half-wave potential (Ehalf) = 0.88 V versus reversible hydrogen electrode (RHE) with a loading of 0.204 mgFe-N-C-SHTcm−2), which is superior to that of Fe–N–C synthesized using individual heat treatment (IHT) (Ehalf = 0.84 V) and Pt/C catalyst (Ehalf = 0.86 V). We achieve enhanced catalytic properties, enhanced methanol tolerance, and long-term durability of the Fe–N–C-SHT catalyst in alkaline electrolyte. The improved ORR activity is attributed to the synergistic effect of Fe doping and optimized SHT methodology, which led to the formation of a highly porous catalyst with numerous active sites. The developed SHT method presents a novel route to fabricate Fe–N–C catalysts with hollow-mesoporous-microporous structures and high performance in ORR.

LaCr1-xFexO3 (0≤x≤0.7): A novel NTC ceramic with high stability

Perovskite-phase LaCr1-xFexO3 (0 ≤ x ≤ 0.7) ceramics were fabricated by two-step sintering of powders synthesized by conventional solid-state reaction. XRD patterns reveals that the ceramics are single-phased LaCr1-xFexO3 solid solution at lower Fe contents, but form a biphasic mixture of LaCrO3-LaFeO3 at higher Fe contents. SEM analysis indicates that Fe doping causes a reduction in porosity, and a corresponding increase in density. The effects of Fe doping on electrical properties have also been investigated. The electrical resistivity ρ25°C decreases initially and then increases within a wide range of 634.4–83915.9 Ω·cm with increasing Fe content, whereas B varies within a relatively narrow range of 3651−4301 K. Such combination enables it to be a potential candidate for NTC thermistors. An investigation of elevated-temperature aging behavior shows that the resistance shifts at 25 °C were less than 0.65 % after annealing at 125 °C in air for 1000 h, revealing that the material exhibits excellent stability.

Enhanced photocatalytic activity of Fe-doped Bi4O5Br2 nanosheets decorated with Au nanoparticles for pollutants removal

The two key factors such as light adsorption and separation of charge carriers in photocatalysts play crucial roles in determining the overall photocatalytic efficiency. Herein, we report synergetic effects of Fe-doping and Au nanoparticles (Au-NPs) deposition on the photocatalytic activity of the modified Bi4O5Br2 (BOB) nanosheets photocatalyst for Bisphenol A degradation and gaseous NO oxidative removal. Fe-doped BOB nanosheets decorated with Au-NPs are synthesized by a two-step chemical method. It was found that the Fe-doped BOB sample decorated with Au-NPs (Au-Fe-BOB) exhibits higher photocatalytic activity than the BOB, Fe-doped BOB, and Au-NPs-loaded BOB samples. Internal Fe-doping in the BOB enhanced the visible light absorption and the separation efficiency of photogenerated charge carriers acting as a scavenger. Moreover, the decorated Au-NPs in the composite photocatalyst extended the light adsorption in the range of visible and near- infrared light due to surface plasmon resonance effect of Au-NPs. The spin trapping measurements of Au-Fe-BOB composite photocatalyst show that the •O2− is a main reactive species during the photocatalytic reaction under visible-light irradiation. The excellent photocatalytic efficiency and stability of Au-Fe-BOB with visible-light response allow to be readily constructed and applied for practical removal of various pollutants using solar light in the future.

Structural and Magnetic Properties of Fe-Doped GaN by Sol-Gel Technique

We report the effects of Fe doping on GaN with different concentrations synthesized by the sol-gel method. Crystalline quality and phase purity are characterized by X-ray diffraction. There is no deductible second phase up to 3% Fe-doped GaN and higher dopant concentration shows degradation in crystal quality with other phase formation. The morphological studies showed a walnut-shaped structure with different sizes up to 3% Fe dopant and the charged surface was observed in 5% due to agglomeration of Fe atoms in GaN, which is consistent with the XRD. The magnetic measurement revealed that up to 3% Fe-doped GaN were ferromagnetic at room temperature, whereas for 5% Fe-doped GaN, magnetization may arise due to dopant cluster; thus, lower percentage of Fe in GaN is suitable for DMS.

Effect of Fe doping on the graphitic level of Mo2C/N-C for electrocatalytic water splitting

How to improve the electronic conductivity of a non-noble metal catalyst for electrochemical water splitting is a hot and challenging research topic. Herein, a rational synthetic approach of Fe doping was adopted to adjust the graphitic degree of nitrogen-rich carbon (N-C) supporting Mo2C nanoparticles, and the prepared electrocatalyst performs outstandingly well in water splitting. It was found that highly graphitic N-C sheets and Mo2C nanoparticles could be simultaneously formed during one-step calcination using ferric chloride, dicyandiamide and ammonium molybdate as precursors. The Mo2C nanoparticles with an average particle size of ca. 3.8 nm are uniformly distributed on the graphitic carbon sheets. The control experiments reveal the essential role of Fe in the preparation of the Mo2C/N-C catalyst. Electrochemical tests show that the catalyst is robust for hydrogen evolution in water splitting under acidic conditions.

The Mechanical Properties of Ni-Mn-Sn Alloy Thin Films with Fe Doping

The mechanical properties of Ni-Mn-Sn alloy thin films with excellent magnetic properties are poor, which limit practical application seriously. Therefore, the effect of Fe doping on the mechanical properties and martensitic reverse transformation of Ni-Mn-Sn thin films were investigated. The grain size of Ni50-xMn39Sn11Fex (x = 0, 0.5, 2, 4) thin films decreases with increasing Fe content. The As and Af of Ni50-xMn39Sn11Fex (x = 0, 0.5, 2) thin films gradually decrease with the increase of Fe content. The austenitic Curie temperature of austenite increases with increasing Fe content. The hardness and elastic modulus of Ni50-xMn39Sn11Fex (x = 0, 0.5, 2, 4) thin films increase with increasing Fe content. The wear resistance, toughness and creep resistance of thin films increases with increasing Fe content. Therefore, doping Fe in Ni-Mn-Sn thin films can improve mechanical properties of alloy thin films significantly.