Effects Of Electrodeposition Time Research Articles

Fabrication of CZTS Films through a Combined Electrodeposition and Solution Process: An Experimental and First‐Principles Study

AbstractSulfurization has a critical role in preparation of CZTS films since the main drawback of CZTS is due to the presence of S‐based impurities. In general, sulfurization could be performed during or following annealing, or the entire CZTS structure could be prepared through sol‐gel. However, toxic gases are used for the former, and the latter takes prolonged times. Alternatively, a combined electrodeposition and solution process was proposed in the present work to prepare CZTS. Briefly, we electrodeposited CZT layers on a metal substrate, and then immersed the as‐prepared coating in a S containing solution for the sulfurization. The effects of electrodeposition time, electrodeposition order, current density, electrolyte compositions, sulfurization time, and annealing pressure were studied. Overall, the results show that S content of the films varied between 27 and 52 % depending on process parameters, thus, suggesting the effectiveness of the proposed approach regarding sulfurization. However, various secondary phases were also detected as well as considerable amount of oxygen impurity. Accordingly, we opted for a computational approach to elucidate the effect of oxygen impurities, and report that the band gap of the films varied between 0.59 and 0.05 eV depending on the presence and which sites oxygen atoms occupy.

Corrosion-resistant superhydrophobic films on galvanized steel by one-step electrodeposition

A simple one-step electrodeposition method is proposed to fabricate corrosion-resistant superhydrophobic films on hot-dip galvanized steel without using low surface-energy materials. The effects of electrodeposition time on surface morphology, surface composition, surface roughness, wettability, and corrosion resistance of the electrodeposited zinc films were investigated. The results revealed that the morphological structures and roughnesses of the deposited zinc films were varied by the electrodeposition times. The roughened zinc films naturally reduced their surface energy during storage for 10 days as the formation of functional groups, transforming them to superhydrophobic and/or nearly superhydrophobic. The electrodeposited superhydrophobic films significantly enhanced the corrosion resistance of the hot-dip galvanized steel. Among them, the 20 min electrodeposition time gave the appropriate morphology and roughness to achieve a superhydrophobic surface with the optimum corrosion inhibition property.

Highly flexible, foldable carbon cloth/MXene/polyaniline/CoNi layered double hydroxide electrode for high-performance all solid-state supercapacitors

Layered double hydroxide (LDH) has become one of the prospective electrode materials due to high specific area, good cycle stability and high power density. However, large internal resistance limits its application in energy storage. The introduction of materials with high electrical conductivity is expected to solve this problem. In here, carbon cloth/MXene/PANI/CoNi-LDH (CC/MXPACN) composites are fabricated by the electrodeposition of PANI and CoNi-LDH on the CC coated with MXene. The effects of electrodeposition time on the electrochemical performances are investigated in detail. The asymmetric supercapacitor is assembled with CC/MXPACN as the positive electrode and activated carbon (AC) as the negative electrode. The device has a 1.6 V voltage window. After 10,000 cycles at a current density of 5 A g−1, the capacitance retention rate is still 91 %. At the power density of 399.95 W kg−1, the energy density of 39.33 Wh kg−1 is provided. Even at the high power density of 2400.35 W kg−1, the energy density can still reach 27.27 Wh kg−1. The asymmetric device has high specific capacitance, long-term stability and good power density and energy density, which exhibit a huge potential in energy storage applications.

Three-dimensional network structured MnCo2S4/NiCo2S4 electrode materials assembled with two-dimensional nanosheets as basic building units for asymmetric supercapacitor applications

Recently, the construction of morphology and structure is considered to be one of the key factors to improve the cycle stability and rate performance of nanomaterials. Herein, MnCo2S4/NiCo2S4 (MCS/NCS) composites with three-dimensional network structures were fabricated by simple electrodeposition of NiCo2S4 nanosheets on the MnCo2S4 nanosheets framework. Compared with the two-dimensional nanosheet structure, the three-dimensional network structure of MCS/NCS has good capacitive and conductive properties. Also, the effects of electrodeposition time on the morphology and electrochemical properties of the composites were studied. Among them, MCS/NCS-6 stands out for its unique structure and excellent electrochemical properties, exhibiting excellent specific capacity (920 C g−1 at a current density of 1 A g−1) and good cycling stability. More importantly, the fabricated asymmetric supercapacitor MCS/NCS//AC assembly has a high energy density of 45.6 Wh kg−1 (800 W kg−1 power density) and good cycle life (75.6%, 10,000 cycles), demonstrating the potential application of this uniquely structured electrode material in alkaline aqueous energy storage devices such as asymmetric supercapacitors (ASC).

Construction of Z-scheme WO3-Cu2O nanorods array heterojunction for efficient photocatalytic degradation of methylene blue

The design of tightly interfacial contact and efficient separation of photogenerated electrons and holes is an effective strategy to improve the activity of heterojunction photocatalysts. Here, a Z-scheme core–shell WO3-Cu2O nanorods array has been synthesized by one-step hydrothermal and electrochemical deposition method for photocatalytic degradation of methylene blue under visible light. The effects of electrodeposition time on the structure, morphology, and photocatalytic performance of the products were investigated in detail. It was found that the optimum Cu2O deposition time was 120 s. The UV–Vis DRS results revealed that the deposited Cu2O nanoparticles onto the surface of WO3 enhance the ability and expand the range of visible light absorption, which inhibit the recombination of photogenerated electrons and holes. Moreover, the photoelectrochemical measurement analyses show that the photocurrent response of heterojunction was significantly enhanced and the interfacial charge-transfer resistance was lowered, which further improve the separation of photogenerated carriers. Also, Z-scheme photocatalytic degradation mechanism was investigated and discussed. In consequence, the WO3-Cu2O-120 s photocatalyst showed the highest reaction rate, which was nearly 2 times than that of pristine WO3. The Z-scheme WO3-Cu2O core–shell heterojunction contribute to efficient spatial charge separation, retained the strong redox ability of photogenerated electrons-holes, which improved the photocatalytic activity.

Controllable Electrodeposition Adjusts the Electrochromic Properties of Co and Mo Co-Modified WO3 Films

Metal ion modification is considered to be an effective way to construct metal oxides with specific physical and chemical properties. In this paper, we prepare a tungsten oxide (WO3) film co-modified by Co-ion and Mo-ion to serve as the electrochromic material through a one-step electrodeposition method. The effect of electrodeposition time on film thickness, surface morphology and electrochromic properties is systematically studied as well. The results show that, compared with pure WO3 film, the surface morphology of the tungsten oxide film modified by Co-ion and Mo-ion (WO3: Co, Mo) is significantly different. The Co and Mo co-modified film possesses a higher transmission modulation (58.5% at 600 nm) and rapid switching speed (coloring and bleaching time are 2.7 s and 5.6 s, respectively), low impedance value and excellent cycle stability. The performance enhancement is mainly attributed to the coral-like structure of the membrane, which provides a larger specific surface area, more ion adsorption sites and faster ion diffusion. Therefore, this work provides a fast and low-cost method to prepare tungsten oxide electrochromic films co-modified with cobalt and molybdenum ions. At the same time, it also provides an idea to obtain films with different electrochromic properties by adjusting the film thickness.

Effect of electrodeposition time on the super-capacitive performance of electrodeposited MnO2 on g-C3N4 nanosheets

Herein, the effect of electrodeposition time on the super-capacitive performance of three-dimensional (3D) MnO2/g-C3N4 heterostructured electrodes was investigated. MnO2 nanoparticles were electrodeposited on the g-C3N4 nanosheets drop-casted on the Ni foam substrate. The microstructural analysis, carried out by FE-SEM and TEM, confirmed the homogeneous distribution of MnO2 nanoparticles on g-C3N4 nano-sheet layers. The electrochemical capacitive performances of the MnO2/g-C3N4 electrodes were evaluated by cyclic voltammetry (CV), galvanostatic charge/discharge tests, and electrochemical impedance spectra (EIS). The obtained results suggested that the supercapacitor (SC) performance of all prepared g-C3N4/MnO2 composite electrodes is higher than pure MnO2 and pure g-C3N4 electrodes. The effect of electrochemical deposition time on the electrochemical performances of the fabricated electrodes was investigated as well. The specific capacitance of synthesized g-C3N4/MnO2 electrodes was measured as 87.6, 67, and 49.5 Fg-1 for 1, 2, and 3 min deposition time respectively at the current density of 0.5 Ag-1, indicating the electrode obtained with shorter deposition time delivers maximum specific capacity. Therefore, this deposition time has been validated as the optimum time for electrochemical energy storage application.

Preparation of electrochemical sensor based on the novel NiO quantum dots modified Cu/Cu2O 3D hybrid electrode and its application for non-enzymatic detection of glucose in serums and beverages

Herein, 3D Cu/Cu2O/NiO hybrid electrodes were successfully synthesized via a seed-medium process combined with electrodeposition. The NiO was deposited on the surface of Cu2O stacked octahedrons as NiO quantum dots (NiO QDS), whereas, Cu was obtained by the reduction of Cu2O during the electrodeposition process. These 3D hybrid electrodes were first proposed and applied to non-enzymatic glucose detection. The effect of electrodeposition time on structure and performance was further investigated. The single Cu2O electrode showed the highest sensitivity (1763 μA m M−1 cm−2), whereas, the 3D hybrid electrodes that being electrodeposited for 2 min exhibited the widest linear range (up to 21.65 mM). In addition, the obtained 3D Cu/Cu2O/NiO QDs hybrid electrode was applied to detect glucose in real serum and beverages. The acceptable sensing performance in real serum and beverages proves our obtained 3D Cu/Cu2O/NiO QDs hybrid electrode a potential for monitoring of glucose in biological and food samples.

Quantum Size Effect in Cu2O Film and Modes of Their Crystal Growth Mechanism

In this review, we cover a systematic study on the effect of electrodeposition time for the growth of Cu2O film with morphological control. Measurements on the as-prepared Cu2O films demonstrated that the surface morphology depend on the grain shape. Based on the electron microscopy observation, the surface grains of Cu2O film showed shape evolution associated with the time of crystal grow. The possible mechanism of film color change from saffron yellow, orange, red to brick red controlled by crystalline quantum size is firstly studied systematically. Moreover, models are set up to discuss the evolution of the morphology and color, which indicate that the morphology and colors were deeply influenced by deposition time and the size of the crystal grains.

Improved high-temperature oxidation resistance of TC4 alloy by electrodeposited SiO2 coating

Thickness controllable SiO2 coating was fabricated on TC4 alloy by electrodeposition. The oxidation behavior of TC4 alloy with SiO2 coating was studied at 700 °C. The effect of electrodeposition time on the coating thickness, morphology, and oxidation performance was studied. Results showed that with the increase of electrodeposition time, the thickness of the SiO2 coating almost linearly increased, while the oxidation resistance improved firstly and then decreased. During high-temperature oxidation, the SiO2 coating could react with the substrate and strengthen the interfacial structure. To further enhance the oxidation performance, before thermal exposure to air, the SiO2 coating protected TC4 alloy was sintered in argon. This resulted in the generation of a compact and glass-like oxide scale which could effectively prevent the inward diffusion of oxygen and the outward diffusion of titanium, therefore significantly enhancing the oxidation performance of TC4 alloy.

Preparation and Mechanical Properties of Layered Cu/Gr Composite Film

Graphene (Gr) has proved its significant role as a reinforcement material in improving the strength of metal matrix composites due to its excellent mechanical properties. In this paper, Gr/Cu composite film with a layered structure was prepared by layering electrodeposition. The directional distribution of Gr in the Cu film was insured by this method, which gives play to its ultra-high-strength in a two-dimensional plane. In the meantime, the effect of electrodeposition time on the distribution structure of the Gr layer was studied. The structure analysis and mechanical properties test show that the strength of the layered Gr/Cu composite film is greatly improved compared to the pure Cu film. Furthermore, the strength of the composite film increases at the beginning and then decreases with the electrodeposition time of the Gr layer increasing, while the coverage and the degree for the layer stacking of Gr gradually increase in this process. In conclusion, the influence of different Gr distributions on the mechanical properties of the composite film has been studied by combining the experimental results with molecular dynamics simulation, which lays an effective foundation for further optimizing the structure of Gr in the layered composite film and improving the mechanical properties.

Preparation and gas-sensitive properties of litchi shell-like NiO film modified porous ZnO composite by electrodeposition method

A kind of litchi shell-like porous NiO/ZnO composite was prepared by the combination of chemical-deposition and then electrodeposition method. Firstly, the porous ZnO matrix material was prepared by soft template method, and then the continuous Ni layer was deposited on the surfaces of ZnO matrix by chemical deposition method to improve the conductivity of the matrix. The Ni layer on the surfaces of ZnO matrix was thickened by electrodeposition method, and the NiO films were finally formed on the surfaces of ZnO matrix after calcination. The morphology of the material showed the litchi shell-like with loose porous structure on the surfaces of the particles. The effect of electrodeposition time on gas sensitivity was investigated at room temperature. When the electrodeposition time was 45 min, the gas sensitivity of the composite material was the best, the respond to 100 ppm NOx gas was 74.0 %, the response time was only 21 s, and the detection limit was 1 ppm at room temperature. The loose porous and n–p heterojunction structure of the composite improved the gas-sensitive performance of the material.

Effect of electrodeposition time on morphology and photoelecrochemical performance of bismuth vanadate films

In this work, facile and low cost electrodeposition method has been used to prepare bismuth vanadate (BiVO4) thin films on fluorine-doped tin oxide glass in order to study photoelectrochemical water splitting performance. The electrochemical deposition was performed at different times (5, 10, 15, 20, 25, 30, 35 and 40 min) using vanadyl sulfate and bismuth (III) nitrate solutions. The phase and microstructure analyses have been performed using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The morphological properties of the prepared films are dependent on the electrodeposition time, based on the FE-SEM results. In addition, UV–Vis diffuse reflection spectroscopy was used to confirm the optical absorption properties and band gap of the samples prepared. Linear sweepvoltammetry, chronoamperometryandopen circuit potential under xenon light irradiation were used to study the photoelectrochemical properties of the films prepared. Variations of the electrodeposition time remarkably changed the photoelectrochemical properties of the films. A high photocurrent density of 0.068 mA cm−2 at 1 V vs. Ag/AgCl was shown by the film deposited for 30 min. In addition, all the samples showed good photo responses and photo stabilities.

The effect of electrodeposition time on CuCl anodes from waste copper etchant

As one common industrial waste liquid, waste copper (Cu) etchant can seriously pollute the environment if it is unreasonably managed. Herein, tetrahedron-like copper (I) chloride (CuCl) crystals were extracted from waste copper etchant by way of facile electrodeposition, and the effect of the electrodeposition time on the lithium (Li)-storage capacity of the copper (I) chloride crystal was further investigated. The results showed that the copper (I) chloride crystal had a regular tetrahedral morphology, and the density of the regular tetrahedral particles gradually increased with the extension of the electrodeposition time from 5 to 15, 20 and 25 s. Correspondingly, the reversible lithium-storage capacity of the copper (I) chloride anode experienced an initial increase and a subsequent decrease. In detail, when cycling at 2 C for 250 cycles, the reversible discharge capacity of the copper (I) chloride anode increased from 187·3 mAh/g at 5 s to 284·5 mAh/g at 15 s and then decreased to 191·9 mAh/g at 20 s and to 125·3 mAh/g at 25 s, indicating that 15 s may be the most optimal electrodeposition time. Excessive copper (I) chloride particles may result in poor performance due to the poor inherent conductivity of copper (I) chloride. Such efforts would alleviate environmental pollution and facilitate the circular economy of wastes.

A Comparative Study of Lead Alloy Electrode and CF/β-PbO2 Electrode for Zinc Electrowinning

A comparative study of lead alloy electrode and carbon fibers based β-PbO2 (CF/β-PbO2) electrode for zinc electrowinning was discussed. The effect of electrodeposition time on the preparation and properties of the CF/β-PbO2 electrode was firstly studied. Surface morphology, interface properties, electrochemical property and corrosion resistance of the CF/β-PbO2 electrodes were investigated. It was found that the optimal conditions are 40 mA·cm−2, 150 g L−1 Pb(NO3)2 and 100 min. Under this conditions, a smooothest surface of β-PbO2 active layer is obtained. The weightlessness rate is 0.22%. The interface resistivity of the electrode is 6.79 × 10−5 Ω·m. The oxygen evolution overpotentials of the electrode is 0.931 V. Compared to the traditional lead alloy electrode, the self-corrosion potential of the CF/β-PbO2 electrode is 1.085 V.

Effects of Electrodeposition Time on Ni/rGO Composite Electrode as an Efficient Catalyst for Hydrogen Evolution Reaction in Alkaline Media

Background: Ni/rGO composite electrode has been fabricated by facile supergravity electrodeposition as a low-cost catalyst for efficient hydrogen evolution in alkaline media. In this paper, the electrodeposition time is the main research variable. When the electrodeposition time is 100 minutes, the Ni/rGO-100 catalyst manifests the highest electrocatalytic activity toward the hydrogen evolution reaction (HER). In 1.0 M NaOH solution, the overpotential at a current density of 100 mA cm-2, Tafel slope and charge transfer resistance of Ni/rGO-100 catalyst is 184 mV, 77 mV dec-1 and 4.173 Ω, respectively. In addition, Ni/rGO-100 catalyst shows a long-term durability at a constant current density of 100 mA cm-2 for 10 h. The outstanding HER electrocatalytic performance of the Ni/rGO-100 is mainly related to the synergetic combination of Ni and rGO, as well as the enlarged exposure of catalytically active sites and improved transport of electrons arising from the good conductivity of graphene. Method: In a classic experiment, GO was prepared by modified Hummers method. The Ni/rGO composite electrodes were prepared by supergravity electrodeposition, which has been reported in detail in our published paper. Firstly, a ø10 cm × 2 cm Ni foam circle was cleaned sequentially in HCl solution (15%), acetone and DI water for 5 min with ultrasonication to be used as a cathode. And a pure nickel pipe was used as anode. The Ni/rGO composite cathodes were electrodeposited in a blackish green plating bath which contained 350 g L-1 Ni(NH2SO3)2·6H2O, 10g L-1 NiCl2·6H2O, 30 g L-1 NH4Cl , 1.0 g L-1 GO colloidal solution with different electrodeposition time, 10min, 30min, 60min, 80min, 100min, respectively. The pH value of the plating bath is 3.5-3.8. The above five electrodes were respectively denominated as Ni/rGO-10, Ni/rGO-30, Ni/rGO-60, Ni/rGO-80, Ni/rGO-100. All composite electrodes were performed under the strength of the supergravity with G=350 g at a current density of 3 A dm-2 at 318 K. Afterwards the Ni foam coated with Ni/rGO hybrid was taken out of the reaction vessel, followed by washing with deionized water to remove physical adsorption residua, and then dried at 80°C. Results: In this paper, the electrodeposition time is the main research variable. When the electrodeposition time is 100 minutes, the Ni/rGO-100 catalyst manifests the highest electrocatalytic activity toward the hydrogen evolution reaction (HER). In 1.0 M NaOH solution, the overpotential at a current density of 100 mA cm-2, Tafel slope and charge transfer resistance of Ni/rGO-100 catalyst is 184 mV, 77 mV dec-1 and 4.173 Ω, respectively. Conclusion: In summary, we have synthesized a class of composite electrodes (Ni/rGO) for HER in alkaline solution by electrodeposition under supergravity field. We studied the effect of electrodeposition time on electrode performance in detail. With the increase of electrodeposition time, the number of active sites is enlarged provided by the electrode. When the electrodeposition time is 100 min, we fabricate the best electrode (Ni/rGO-100). The η100, Tafel slope and charge transfer resistance of Ni/rGO-100 is 184 mV, 77 mV dec-1 and 4.173 Ω, respectively. The introduction of graphene and supergravity field plays a key role in improving the performance of the electrodes. This work is a pivotal part of the development of Ni/rGO as a non-precious HER catalyst for green energy field.

Preparation and Catalytic Performance of Ni-Cu-B/TNTs Electrode by Cyclic Voltammetry Electrodeposition for Methanol Electro-Oxidation

Orderly TiO2 nanotube arrays (TNTs) with high surface area became a prospective catalyst support. TNTs were obtained by anodizing Ti plate, and then the Ni-Cu-B/TNTs electrodes were prepared by cyclic voltammetry electrodeposition (CVE) method. SEM, EDS and electrochemical testing were used to investigate the microstructure and catalytic performance Ni-Cu-B/TNTs electrodes for methanol electro-oxidation. Effects of electrodeposition time, CVE scanning rate and times on the methanol electrooxidation were studied. The results show the shape of Ni-Cu-B particles on surface change from fusiform-like to spherical with an increasing of deposition temperature. The peak current density initially increased and then decreased with increasing electrodeposition time, rate and number of CVE scanning. The Ni-Cu-B/ TNTs electrode prepared by 30 cyclic times in 30°C at-0.8~0.2V and the scan rate of 20mV s-1 appear the best electrocatalytic activity for methanol oxidation. After cycled 1300 times for methanol oxidation, the peak current density decreased by 12%, indicating excellent long term stability of Ni-Cu-B/TNTs electrode.

Catalysis for Low-Temperature Fuel Cells

Today, the development of active and stable catalysts still represents a challenge to be overcome in the research field of low-temperature fuel cells.[...]

Cu2ZnSnS4 electrodeposition By Sulfurization of Metallic Precursors

Cu2ZnSnS4 (CZTS) is a kesterite-type material with promising properties among the materials suitable to be used as absorbers in solar cells. It is highly absorbent (α ≥ 105 cm-1), with a direct bandgap energy value (E GAP) suitable for solar light absorption (E GAP close to 1.5 eV) [1]. The constituting elements are not toxic, expensive or scarce, as is the case in competing family compounds such as chalcopyrites (CuInGaSe2). CZTS films are thus excellent candidates for low-cost, highly efficient and environmentally friendly solar cells [2]. There are different electroplating routes to obtain CZTS. In a previous work [3] we explored electrodeposition from a single bath containing the four elements and found it difficult to stabilize the sulfur source in the precursor mixture. Moreover, sulfur was found to incorporate into the material mainly during the sulfurization stage. In this work, the synthesis started with the deposition of a Cu-Zn-Sn precursor (CZT), to be continued by the incorporation of S during a heat treatment in the presence of vaporized sulfur that transforms the precursor into CZTS. The purpose of this investigation was to adjust the pH of the precursor bath to 5.9, so that CZTS could be deposited on top of ZnO, in order to prepare solar cells in superstrate configuration. The effect of electrodeposition time and annealing temperature were also explored. Thin films of CZTS were prepared by sulfurization of metallic precursors (CZT) previously electrodeposited during 5 to 10 min at -1.15 VSCE using conducting glass (FTO) as primary substrate. The precursor solution consisted of 100 mmol/L ZnSO4, 30 mmol/L CuSO4, 10 mmol/L SnSO4 and 100 mmol/L of sodium citrate as complexing agent. Citrates and hydroxyls concentrations were adjusted so that pH = 5.9. Electrodeposited CZT precursors underwent a reactive sulfurization annealing stage in a three-temperature zone thermal reactor. First, the samples were placed in the cold zone of the tube (room temperature). Then the second zone was heated to 500 °C and in the third zone the sulfur powder (0.3 g) was allowed to reach 350 °C (melting starts at around 150 °C). The vaporized sulfur reached the samples assisted by argon flux. After 30 to 60 minutes, the samples were left to cool down naturally. CZTS films were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electronic microscopy (SEM), UV-Vis spectroscopy and photoelectrochemical techniques. SEM results showed good coverage and homogenous morphology. Also, cross-section images showed thickness values close to 1 micron and higher than expected, even for samples electrodeposited for just 10 min. Raman spectroscopy and XRD results confirmed the formation of crystalline CZTS after sulfurization, with no secondary phases detected in the film. Photocurrent analysis confirmed the p-type nature of the semiconductor. Direct energy gap values close to 1.5 eV were estimated for CZTS films using transmittance spectra. CZTS films obtained with short electrodeposition times are good-quality absorbers suitable to be used in kesterite thin films solar cells. Preliminary results from solar cells in superstrate configuration show a promising photovoltaic response.

One-step electrodeposition of poly (3,4-ethylenedioxythiophene) on carboxylated multi-wall carbon nanotubes and its application in ascorbic acid sensing

The poly (3,4-ethylenedioxythiophene) (PEDOT) nanomaterial was synthesised by a facile electrodeposition on a glassy carbon electrode (GCE) modified by carboxylated multi-wall carbon nanotubes (CA-MWCNTs). The nanocomposite was characterized using transmission electron microscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy and fourier transform infrared spectroscopy. Moreover, a highly sensitive ascorbic acid (AA) sensor was developed based on the nanocomposite. Owing to the combination of the advantages of CA-MWCNTs and PEDOT, the modified electrode exhibited excellent electro-catalytic activity for AA detection which was investigated in detail by cyclic voltammetry and chronoamperometry. The cationic PEDOT film on CA-MWCNTs could interact with anionic AA in neutral PBS at a low potential and distinguish the oxidation peaks of common interfering species. The effects of electrodeposition time and pH value on the current responses of the modified electrode towards AA were optimized to obtain the maximal sensitivity. The prepared AA sensor demonstrated high sensitivity (1699.36μAmM−1cm−2), wide linear range detection (100μM to 20mM), low detection limit (4.2μM), rapid response time (less than 4s), good selectivity and long-term stability. This work presented a facile approach for future research in AA amperometric sensors.