Incorporation Of Cu Research Articles

Micro/nanostructured MTMOs as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Medium

Different nanostructured mixed transition-metal oxides were synthesized using a facile and controllable hydrothermal method. Incorporation of Cu2+ and Ni2+ in Co3O4 structure led to an interesting morphological transformation, from quasi-spherical nanoparticles to microspherical urchin-like aggregates of radially assembled nanoneedles. These oxides have notable low crystallite size, narrow size distribution, and high degree of crystallinity. In general, partial cobalt substitution resulted in an improved electrocatalytic activity for oxygen evolution reaction (OER), with NiCo2O4 demonstrating superior performance among the catalysts prepared. It recorded a low overpotential of 374 mV and achieved high stability, making it competitive with state-of-the-art RuO2 and IrO2 (387 mV). This material is of great potential for sustainable energy applications.

In Situ Cu-Loaded Porous Boron Nitride Nanofiber as an Efficient Adsorbent for CO2 Capture

Porous boron nitride (BN) materials have been considered as a promising material for CO₂ capture and storage. It was found that the Cu²⁺ ion can modify the nucleation mechanism during the synthetic reaction between boric acid and melamine leading to the formation of Cu-loaded BN nanofibers with uniform and smaller diameter. Interestingly, the introduction of Cu was found to dramatically enhance the CO₂ adsorption capacity of the BN nanofibers from 1.34 to 2.77 mmol g–¹ (at 1 bar, 273 K). The Cu-loaded BN nanofiber not only shows a CO₂ adsorption capacity comparable to those of state-of-the-art BN-based CO₂ absorbents but also shows unprecedented high recyclability for repeated uses. The mechanisms of the copper-induced CO₂ adsorption capacity enhancement were investigated with density-functional theory calculations. It was found that the incorporation of Cu can change the electron transfer between porous BN and CO₂ to promote the affinity and adsorption capacity of CO₂.

Photocatalytic activity and photo-electrochemical performance of trimetallic (Cu–Ni–Zn)/TiO2 coating on AISI 316L stainless steel for water treatment

Trimetallic (Cu–Ni–Zn)-doped TiO2 photocatalyst was synthesized by the sol–gel method and deposited on AISI 316L stainless steel for industrial wastewater treatment. For comparison purpose, an undoped TiO2 coating was also prepared and investigated. SEM examinations revealed that the incorporation of Cu, Ni and Zn led to the formation of a uniform and compressed coating. The UV–Vis diffuse reflectance spectroscopy confirmed that the addition of Cu, Ni and Zn into TiO2 coating reduced its band gap and improved its photocatalytic activity. Moreover, the corrosion tests (polarization and EIS examinations) in 3.5% NaCl solution under dark condition showed that the (Cu–Ni–Zn)/TiO2 coating exhibited superior corrosion performance compared with that obtained for undoped TiO2 coating. The water treatment evaluations were carried out utilizing methylene blue degradation, COD and BOD assessments on water samples collected from steam-water unit of Isfahan Oil Refining Company. It was concluded that (Cu–Ni–Zn)-doped TiO2 coating is potentially a suitable alternative to replace undoped TiO2 for water treatment under UV illuminations.

Effects of Cu addition on the microstructure and properties of the Al–Mn–Fe–Si alloy

Abstract Heat exchanger materials with high strength and thin thickness are highly required due to the increasing demands of weight reduction and fuel economy of the automobile. In this work, 0.5 wt% Cu was added to an Al-1.5Mn-0.3Fe-0.6Si (wt.%) alloy to improve the strength. The microstructure, mechanical properties, and electrochemical properties of the tested alloys were systematically investigated. The results suggest that part of Cu is dissolved into the Al matrix, and the balance is incorporated into the Al(Mn,Fe)Si particles. Cu addition improves the strength at the expense of deteriorating the pitting corrosion resistance. On the one hand, the improved strength derives from enhanced solid solution hardening and increased nanoparticle strengthening. On the other hand, the incorporation of Cu in the Al(Mn,Fe)Si intermetallic particles increases the potential difference between the particles and the Al matrix, resulting in the deteriorated pitting corrosion resistance.

Discovery of mono(u-oxo)dicopper and bis(u-oxo)dicopper in ordered Cu incorporated in SBA-15 via sol-gel process from silatrane at room temperature: An in situ XAS investigation

Abstract We proposed a synthesis pathway to obtain high-yielding SBA-15 containing copper (Cu-SBA-15) via a sol-gel process from silatrane and discovered that the active copper species had a large pore size and narrow size distribution, where the pore sizes increased with increasing copper content. In addition, the results from UV–Vis–NIR spectroscopy revealed that the active copper species were mono(u-oxo)dicopper [Cu2(μ-OH)2]2+ (21 740 cm−1) and bis(μ- η2: η2 peroxo)dicopper [Cu2(μ- η2: η2-O2]2+ bent (17 850–18 691 cm−1) and planar (24 690 cm−1). Furthermore, the microscopic techniques (scanning (SEM) and transmission (TEM) electron microscopy) showed the characteristic of a long length channel and retained SBA-15 structure after incorporation of Cu, even at high copper loadings, and had a higher copper content loading with a longer length of Cu-SBA-15. In addition, the 9% Cu-SBA-15 was characterized by broad X-ray powder diffraction (XRD) which was used to inspect the aggregation and formation of CuO and no peak was observed. All evidence suggested that the Cu-SBA-15 successfully prepared and discovered the active copper species. In-situ XAS showed that to produce active copper species in Cu-SBA-15, heating under a helium atmosphere at 350 °C for 30 min was sufficient for the formation of bridge oxygen (Cu-Ox-Cu) with the characteristics of mono(u-oxo)dicopper and bis(u-oxo)dicopper.

CuO NPs incorporated into electron-rich TCTA@PVP photoactive polymer for the photocatalytic oxidation of dyes and bacteria inactivation

Herein we report the synthesis of electron-rich TCTA@PVP conjugated polymer (CP) modified with CuO NPs as a photocatalyst for water remediation and disinfection under visible light (λ > 420 nm). CP@CuO showed an extended visible light response up to 900 nm. The photoactivities of bare CP, CP@Cu and CP@CuO with and without peroxymonosulfate (PMS) addition were tested towards the oxidation of MB under visible light. It was found that the incorporation of Cu(II) or CuO into CP platform enhances the photocatalytic activity and PMS activation due to the synergistic effects in terms of better visible light response and high yield photogenerated reactive oxygen species. In addition, rich-electron CP can help the redox recycling of Cu(I) and Cu(II) species via electron transfer from CP to CuO under visible light, which in turn facilitates the activation of PMS (HSO5−) to HSO4 radicals. The photocatalytic antibacterial activity of CP@CuO by considering E.Coli inactivation in water under UV–vis light was investigated.

ZnTe-based photocathode for hydrogen evolution from water under sunlight

Zinc telluride (ZnTe)-based photocathodes with appropriate modifications showed incident-photon-to-current conversion efficiencies (IPCEs) higher than 30% at 420–520 nm, reached 40% IPCE at 460 nm, and were not zero up to 710 nm because of photoexcitation related to the intermediate-band. ZnTe films were prepared by productive close-spaced sublimation. After surface modification with CdS and Pt, the photocathode showed clear cathodic photoresponse in the phosphate buffer solution. The modulation of substrate temperature, incorporation of Cu, and further surface modification with very thin Mo and Ti layers significantly enhanced cathodic photocurrent which contributes to hydrogen evolution from water. Through the measurement of IPCEs, photoelectrochemical hydrogen evolution from water utilizing photoexcitation related to the intermediate-band was first confirmed. The photocathode showed advantageous durability under simulated sunlight: during irradiation of about 50 min, the stabilized photocurrent slightly decreased from 1.6 mA cm−2 to 1.5 mA cm−2.

Structural, electrical transport and magnetic properties of Nd3+ substituted Mn–Cu nanoferrites

Abstract In present study, a series of spinel ferrite nanoparticles (NPs) with general formula Mn1-xCuxNd0.15Fe1.85O4 (x = 0.0, 0.1, 0.3 and 0.5) have been prepared by sol-gel route. The powder X-ray diffraction (XRD) and Raman spectroscopy revealed the formation of single phase of cubic spinel structure in doped samples. However, a formation of NdFeO3 secondary ortho-ferrite phase has been observed for higher content of x = 0.5. The average crystallite size calculated from Scherrer’s formula has been found in the range 6.5–16.5 nm. The lattice constant (a) estimated using XRD data has been found to increase from 8.4265 A to 8.4501 A on incorporation of Cu2+ ions. FTIR spectra of prepared NPs exhibit two prominent absorption peaks near 600 cm−1 and 400 cm−1 associated to 596 cm−1 and 496 cm−1 band. The dc resistivity measurements with a rise in temperature divulge the typical semiconducting behavior of the as-synthesized samples. The activation energies of the samples have been calculated from Arrhenius plot and found to be in between 0.29 eV and 0.59 eV. Furthermore, the frequency dependent dielectric permittivity, loss tangent and ac conductivity revealed the usual dielectric dispersion. The behavior of dielectric properties highlighted the Debye relaxation peak which is interpreted in the view of Koop’s theory in the light of the Maxwell-Wagner model. Real ( Z ’ ) and imaginary ( Z ’ ’ ) part of impedance confirm the relaxation mechanism associated to the grains and grain boundaries effect. Electron paramagnetic resonance (EPR) pattern shows a broad sharp resonance signal with Lange g-factor varies from 2.04 to 2.18, which is due to dominant spin-exchange interaction between Fe3+, Mn2+, and Cu2+ ions. P-E hysteresis loops found the ferroelectric nature of the ferrite samples. Typical soft ferrimagnetic behavior of Nd3+ substituted Mn–Cu ferrites have been observed at room temperature. The low losses, giant dielectric constant and high resistivity of prepared ferrite NPs can offer several applications like power transformers and microwave devices.

Porous Polymer-Titanium Dioxide/Copper Composite with Improved Photocatalytic Activity toward Degradation of Organic Pollutants in Wastewater: Fabrication and Characterization as Well as Photocatalytic Activity Evaluation

Titanium dioxide (TiO2) and TiO2/copper (denoted as TC) composite were prepared via hydrothermal process. In the meantime, divinylbenzene (DVB) and bismaleimide (BMI) monomers were allowed to participate in in-situ radical polymerization in the presence of azobisisobutyronitrile (AIBN) initiator to afford porous polymers (abridged as PP). The as-obtained PP were mixed together with tetrabutyl titanate (TBT) and CuSO4·5H2O in vacuum to obtain PP/TC composite (denoted as PPTC) containing incorporated TC composite in the pores of PP. The as-prepared TiO2, TC, and PPTC were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, fluorescence spectrometry, and electron spin resonance spectrometry, and so on. Furthermore, their photocatalytic activity for the degradation of N,N-dimethylformamide, methyl orange, phenol, and methylene blue under the irradiation of simulated sunlight (Xe lamp light) and natural sunlight were investigated. Findings indicated that, whether under simulated sunlight or nature sunlight irradiation, PPTC exhibited much better photocatalytic performance than TiO2 and TC for the degradation of the tested organic pollutants. Particularly, it allowed N,N-dimethylformamide (DMF) to be degraded by a rate of 73.7% under simulated sunlight irradiation and it retained photocatalytic activity even after six cycles of reuse, exhibiting promising potential for the removal of organic pollutants in wastewater (including industrial water, aquaculture wastewater, and domestic sewage). The desired photocatalytic performance of the as-prepared PPTC is attributed to two aspects. Namely, the incorporation of Cu2+ into the fine structure of TiO2 contributes to increasing photocatalyst activity and producing more free radical while the embedding of TC composite into the PP pores improves to the contact area between the photocatalyst and organic pollutants, and both are beneficial for improving the adsorption capacity and activity of the photocatalyst, thereby enhancing the degradation of the organic pollutants.

Uranium removal from mining water using Cu substituted hydroxyapatite

In this study, synthetic copper substituted hydroxyapatite (Cu-Hap), CuxCa10-x(PO4)6(OH)2 were prepared by co-precipitation method and were used as reactive materials in batch experiments to immobilize uranyl. The limit of incorporation of Cu into a single-phased Cu-Hap reached xCu ≤1.59. The synthetic Cu-Hap samples obtained with various Cu contents were contacted with synthetic uranyl doped solutions and with real mining waters showing various pH and chemical compositions. A fast and strong decrease of the uranium concentration was observed, followed by the establishment of an equilibrium after 1–4 days of contact with the solutions. Examination of the solid phase after uranium uptake was performed using a combination of techniques. Depending on the composition of the solution and the copper content of the Cu-Hap, various mechanisms of uranium removal were observed. Based on the experimental results and geochemical simulations, it appeared that the main interest for using Cu-Hap is to enlarge the domain of water compositions for which the precipitation of meta-torbernite, (H3O)0.4Cu0.8(UO2)2(PO4)2·7.6 H2O is the predominant mechanism associated to the uranium removal, especially for pH > 6.7 where carbonate uranium species are predominant.

Localized surface plasmon resonance of Cu-doped ZnO nanostructures and the material’s integration in dye sensitized solar cells (DSSCs) enabling high open-circuit potentials

Herein, we report one step co-precipitation method of synthesis of ZnO and Cu-doped ZnO nanostructures with distinct amount (1, 3 and 5 mol %) of copper. All the synthesized samples are characterized by X-ray powder diffraction, Field emission scanning and Transmission emission microscopy. The optical properties of the samples were evaluated by UV-visible spectroscopy and photoluminescence studies. The presence of Cu atoms in the ZnO matrix enhances a broad spectral absorption upto near-IR region. Suppressed E2high phonon modes are observed in Cu-doped samples through Raman scattering measurements, which furnishes evidence for effective Cu-doping in ZnO crystal lattice. Un-doped and Cu-doped ZnO samples were integrated in Dye sensitized solar cells (DSSCs) as photoanode materials. The device performance and interface charge transfer properties were evaluated through photocurrentdensity-photovoltage measurements and electrochemical impedance spectroscopy respectively. It is noted that the incorporation of Cu2+ into the hexagonal wurtzite structure of ZnO considerably elevates the Fermi levels towards the conduction band edge which is the root cause for high open-circuit potentials of DSSCs integrated with Cu-doped ZnO photoanodes.

Dual-doped CdSe:Cu:O films grown by sputtering using CdSe–CuO composite targets

The effects of the simultaneous incorporation of Cu and O in CdSe films grown by sputtering are presented. The Cu and O contents varied between 1 and 5 at.% in films deposited at 150, 200, 250 and 300 °C. Concentrations of 2, 3, 4 and 5 at.% of CuO in the target promoted the formation of copper selenide clusters immersed within the CdSe:Cu:O host. Energy considerations (enthalpy of formation and bond dissociation energy) were used to discuss the absence of copper oxide and the formation of copper selenide aggregates, as well as the film thickness dependence on the concentration of CuO in the target. The band gap of the films ranged from 1.21 to 2.07 eV, depending upon growth conditions. Significant below-band-gap absorption was observed which was ascribed to the copper selenide micro and nano clusters. Good crystalline quality of the films, for high substrate temperatures, was evidenced through the appearance of overtones of the vibrational longitudinal optic modes detected by Raman micro spectroscopy. It was determined that the electronic properties, optical transmission and electrical conductivity depended on the chemical composition and crystalline structure. This characteristic is relevant because through copper and oxygen co-doping is possible to control these technologically important physical properties of CdSe in a simple and reliable manner.

Electronic Asymmetric Distribution of RhCu Bimetallic Nanocrystals for Enhancing Trifunctional Electrocatalysis.

Developing efficient and durable multifunctional electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR) is of significant importance for many electrochemical energy devices, such as water electrolyzers, metal-air batteries, and fuel cells. Herein, the Rh-Cu alloy nanocrystals (NCs) are prepared with a simple wet-chemical approach. The tuning of morphology and the asymmetric electron distribution provide more efficient Rh-Cu bimetallic sites. Meanwhile, the incorporation of Cu into the Rh lattice could reduce the oxidation of Rh-Cu bimetallic sites and increase the catalytic stability. Under the tuning of the composition, the drastically enhanced electrocatalytic activities of HER, OER, and ORR are achieved in the Rh6Cu1 NCs with the cell voltage required to be as low as 1.55 V to accomplish an overall water splitting of 10 mA cm-2 and a maximum power density of 142.58 mW cm-2 for a zinc-air battery with good stability, representing the best trifunctional electrocatalysts for all we know. This work highlights the design and control of Rh-Cu NCs, which could be a potential alternative approach to trifunctional catalysis and further boosts the development of the bimetallic electrocatalysts in the energy conversion system.

Development of dual function polyamine-functionalized carbon dots derived from one step green synthesis for quantitation of Cu2+ and S2- ions in complicated matrices with high selectivity.

The study of biologically important Cu2+ and S2- ions has drawn great attention in the recent years since an abnormal level of these ions is an indication for health impairment. Therefore, a reliable strategy for effective fluorescence determination of Cu2+ and S2- ions was developed. Simply, the method based on economical plant-dependent thermolysis procedure for efficient green synthesis of water dispersible luminescent polyamine-based carbon dots (PA@C-dots) utilizes Vitis vinifera juice as precursor with a high quantum yield (32.1%) and good photo-stability. The fluorescent PA@C-dots were characterized by different spectroscopical, physical, and structural techniques. Furthermore, the synthesized PA@C-dots can be used as an efficient dual functional fluorescent probe for the sensitive and selective estimation of Cu2+ and S2- ions. The incorporation of Cu2+ ions and their adsorption on the surface of PA@C-dot skeleton leads to the respectable fluorescence quenching of C-dots (turn-off mode). The Cu2+-PA@C-dot was found to be sensitive to S2- ions. The addition of S2- recovers the fluorescence (turn-on mode) of Cu2+-PA@C-dots, thanks to its capacity for withdrawing Cu2+ from the shell of PA@C-dots. Fluorescence quenching in the range of 0.07-60μM Cu2+ was obtained with LOD and LOQ of 0.02 and 0.066μM, respectively. Sulfide detection provides linearity in the range of 0.8 to 95μM with LOD and LOQ of 0.24 and 0.79μM, respectively. The optimal excitation and emission wavelengths for all experiments are 435nm and 498nm, respectively. Experiment results elucidate that the proposed method is suitable for Cu2+and S2- ion detection in environmental water samples. Graphical abstract Green synthesis of polyamine-functionalized nanoprobe by thermolysis method from plant source as bifunctional sensing platform for determination of Cu2+ and S2- in environmental water samples.

Рентгенолюминесценция тетраподов ZnO, выращенных в присутствии примеси Сu и Au в исходной шихте

The morphology and luminescent properties of ZnO tetrapod powders with Cu and Au impurities obtained by pyrolytic carbothermal synthesis were studied. The X-ray luminescence spectrum of the samples is dominated by a broad band in the range from 450 to 650 nm. A weak band-edge luminescence band with a maximum at 391 nm is also registered. Measurements of the decay kinetics showed the presence of both fast (~ 1 ns) and slow (~ 850 ns) luminescence components, where the fast one generally did not exceed 1% of the integrated intensity. It is shown that with the used doping method, the incorporation of Cu and Au impurities into the ZnO lattice does not occur. In this case, the presence of Cu with a concentration of up to 9% does not affect the morphology and luminescent properties of tetrapods, while Au has an effect even at a concentration close to 1%.

Electronic modulation of cobalt phosphide nanosheet arrays via copper doping for highly efficient neutral-pH overall water splitting

We report here, an effective strategy to optimize the electronic structure of CoP using copper doping, for greatly enhancing the intrinsic activity and conductivity of CoP in neutral-pH water splitting. As a result, the as-synthesized 3D self-supported Cu-doped CoP nanosheet arrays on carbon paper (Cu-CoP NAs/CP) exhibits admirable electrocatalytic performance toward both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) with overpotentials of 81 and 411 mV at 10 mA cm−2 in 1.0 M PBS (Phosphate Buffer Solution), respectively. Moreover, a neutral electrolyzer, using Cu-CoP NAs/CP as both the anode and cathode, achieves a low cell voltage of 1.72 V at 10 mA cm−2, superior to that of the typical Pt/C||IrO2 couple (1.81 V) and of most of the state-of-the-art bifunctional electrocatalysts. Impressively, the electrolyzer can be driven by a single AA battery (∼1.5 V), indicating its practicality in neutral water or seawater splitting. Experimental and density functional theory (DFT) calculations results reveal that the incorporation of Cu into CoP can effectively improve the conductivity and optimize the electronic structure to facilitate the H* adsorption and desorption and the formation of O* intermediates (generated CoOOH active species), thus yielding superior HER and OER catalytic activities. This study opens up a promising way to rationally design highly efficient and low-cost electrocatalysts for electrocatalysis applications.

The effect of Cu addition on the crystallization behavior and tribological properties of reactive plasma sprayed TiCN–Cu coatings

TiCN–Cu coatings were fabricated by reactive plasma spraying using Ti-graphite aggregates and Cu powders. The crystallization, mechanical and tribological properties were investigated. The results showed that TiCN–Cu coatings shared a face-center cubic structure and they consisted of TiC0·7N0.3, TiN0·3O, Cu2O, Cu, amorphous CNx and residual graphite phases. The addition of Cu mainly changed the crystallization behavior of the coating surface and binding surface with the substrate. Compared with TiCN coating, TiCN–Cu coatings had the lower hardness and hardness distribution uniformity. The incorporation of Cu improved the coating fracture toughness, while failed to improve the coating tribological properties. The main wear mechanism of TiCN–Cu coatings in the present sliding test were adhesive wear, coupling with partial tribo-oxidation wear.

Co-Evaporated CuO-Doped In2O3 1D-Nanostructure for Reversible CH4 Detection at Low Temperatures: Structural Phase Change and Properties

In order to improve the sensitivity and to reduce the working temperature of the CH4 gas sensor, a novel 1D nanostructure of CuO-doped In2O3 was synthesized by the co-evaporation of Cu and In granules. The samples were prepared with changing the weight ratio between Cu and In. Morphology, structure, and gas sensing properties of the prepared films were characterized. The planned operating temperatures for the fabricated sensors are 50–200 °C, where the ability to detect CH4 at low temperatures is rarely reported. For low Cu content, the fabricated sensors based on CuO-doped In2O3 showed very good sensing performance at low operating temperatures. The detection of CH4 at these low temperatures exhibits the potential of the present sensors compared to the reported in the literature. The fabricated sensors showed also good reversibility toward the CH4 gas. However, the sensor fabricated of CuO-mixed In2O3 with a ratio of 1:1 did not show any response toward CH4. In other words, the mixed-phase of p- and n-type of CuO and In2O3 materials with a ratio of 1:1 is not recommended for fabricating sensors for reducing gas, such as CH4. The gas sensing mechanism was described in terms of the incorporation of Cu in the In2O3 matrix and the formation of CuO and In2O3 phases.

Trace elemental alterations of bivalve shells following transgenerational exposure to ocean acidification: Implications for geographical traceability and environmental reconstruction

Trace elements of bivalve shells can potentially record the physical and chemical properties of the ambient seawater during shell formation, thereby providing valuable information on environmental conditions and provenance of the bivalves. In an acidifying ocean, whether and how seawater acidification affects the trace elemental composition of bivalve shells is largely unknown. Here, we investigated the transgenerational effects of OA projected for the end of the 21st century on the incorporation of trace elements into shells of the Manila clam, Ruditapes philippinarum. Neither seawater pH nor transgenerational exposure affected the Mg and Sr composition of the shells. Compared with clams grown under ambient conditions, specimens exposed to elevated CO2 levels incorporated significantly higher amounts of Cu, Zn, Ba and Pb into their shells, in line with the fact that at lower pH, these elements in seawater occur at higher fractions in free forms which are biologically available. Transgenerational effects manifested themselves significantly during the incorporation of Cu and Zn into the shells, most likely because Cu and Zn are biologically essential trace elements for metabolic processes. In addition, the plasticity of metabolism toward energetic efficiency following transgenerational exposure confers the clams enhanced ability to discriminate against Cu and Zn during the uptake from the ambient environment to the site of calcification. In the context of near-future OA scenarios, these findings may provide unique insights into the two primary applications of trace elements of bivalve shells as geographical tracers and proxies of environmental conditions.

Microstructure, Properties, and Titanium Cutting Performance of AlTiN–Cu and AlTiN–Ni Coatings

In this study, three kinds of coatings, AlTiN, AlTiN–Ni, and AlTiN–Cu were deposited via the cathodic arc evaporation method. The microstructure, mechanical properties, oxidation resistance, and cutting behavior of these coatings were then investigated. The incorporation of Cu(Ni) into AlTiN eliminated its columnar structure and led to an increase in the growth defects of its macroparticles. The addition of Cu and Ni decreased the hardness of the coatings, their elastic moduli, and their friction coefficients. All of the AlTiN, AlTiN–Ni, and AlTiN–Cu coatings presented sufficient adhesion strength values. The oxidation resistance of these three coatings was determined to be in the following order: AlTiN > AlTiN–Ni > AlTiN–Cu. Titanium turning experiments indicated that the cutting force was reduced and the tool life was improved through doping with Cu(Ni) elements, dependent on cutting speed. The AlTiN–Ni coating showed the best performance at a high cutting speed, whereas the AlTiN–Cu coating was more successful at a lower cutting speed.