3D Graphene Aerogel Research Articles

Polyaniline modified exfoliated graphene aerogel as high-performance anion-capture electrode for hybrid capacitive deionization

The synergistic effect between polyaniline (PANI) and graphene nanosheets significantly enhances the monolithic capacitance and cycling stability, making it an attractive choice for use as an anode material in capacitive deionization (CDI). However, traditional preparation processes are usually complex and time-consuming. Herein, we proposed a simplified solid-phase strategy by using air-plasma technique to fabricate 3D puffy graphene aerogel supported PANI (PANI@PG) nanocomposites within 1 s. In this material, elongated dumbbell-shaped PANI particles with diameters of 30–60 nm were firmly anchored and highly dispersed on graphene sheets, meanwhile, the exfoliated graphene sheets with a large interlayer distance of 0.4 nm were well interconnected. It was demonstrated that as prepared PANI@PG is characteristic of 2–50 nm mesopores, which both ensures a sufficient exposure of PANI active sites to electrolyte and favors the Cl− diffusion-intercalation process. The freestanding PANI@PG electrode exhibited excellent figure-of-merits of the salt adsorption capacity (43.5 mg g−1), charge efficiency (88.6 %), and cycling stability (retention of 77.1 % after 40 cycles). This work paves a new way for constructing 3D conducting polymer/graphene nanocomposites with promising applications in CDI and beyond.

Sea Urchin-Like NiCo-LDH Hollow Spheres Anchored on 3D Graphene Aerogel for High-Performance Supercapacitors.

To enhance the inherent poor conductivity and low cycling stability of dimetallic layered double hydroxides (LDHs) materials, designing a synergistic effect between EDLC capacitors and pseudocapacitors is an efficient strategy. In this paper, we utilized a solvothermal technique employing Co-glycerate as a precursor to prepare sea urchin-like NiCo-LDH hollow spheres anchored on a 3D graphene aerogel. The unique morphology of these hollow microspheres significantly expand the specific surface area and exposes more active sites, while reducing the volume changes of materials during long-term charging and discharging processes. The 3D graphene aerogel serves as a conductive skeleton, improving the material's electrical conductivity and buffering high current. The sea urchin-like NiCo-LDH hollow spheres anchored on 3D graphene aerogel (H-NiCo-LDH@GA) has a specific surface area of 51 m2 g-1 and the ID/IG value is 1.02. The H-NiCo-LDH@GA demonstrate a significant specific capacitance of 236.8 mAh g-1 at 1 A g-1, with a remarkable capacity retention rate of 63.1 % even at 20 A g-1. Even after 8000 cycles at 10 A g-1, the capacity retention still remains at 96.3 %, presenting excellent cycling stability.

Enhanced removal of lead and zinc by a 3D aluminium sulphate-functionalised graphene aerogel as an effective adsorption system

The discharge of heavy metals into the environment has adversely affected the aquatic ecosystem due to their toxic and non-biodegradable nature. In this research, a three-dimensional graphene oxide/carboxymethylcellulose/aluminium sulphate (GOCAS) aerogel was synthesised and evaluated as a novel means for lead and zinc removal. The GOCAS aerogel was prepared via ice-templating of graphene oxide with carboxymethylcellulose and aluminium sulphate as the crosslinking and functionalisation additives. Characterisation of the aerogel by various analytical techniques confirmed the successful integration of the chemical additives. The hydroxyl and sulphate groups in the aerogel were found to participate in the adsorption of both metals. The equilibrium of lead adsorption was found to correlate well to the Freundlich isotherm, while zinc adsorption fitted closely the Langmuir isotherm. The kinetic adsorption behaviour of both metals was best described as pseudo-second-order. The interactive influences of concentration, temperature, contact time and adsorbent dose on the metal removal were explored by a central composite design, and the optimum adsorption capacity for lead was determined to be 138.7 mg/g at a GOCAS dose of 20 mg, initial concentration of 100 mg/L, temperature of 50 °C and contact time of 45 min. The optimum adsorption capacity for zinc was 52.69 mg/g at 30 mg, 65 mg/L, 45 °C and 40 min. Furthermore, regeneration studies with hydrochloric acid eluant were successfully conducted for up to four adsorption-desorption cycles. Overall, this work demonstrates that GOCAS aerogel is a viable nanosorbent for the adsorption of lead and zinc from water systems.

Graphene aerogel based positive electrode for lithium ion batteries

In this study, a composite of LiNi0.8Mn0.1Co0.1O2 nanoparticles (nNMC-811) supported by three-dimensional (3D) graphene aerogel (GA) was prepared to increase the practical energy density and performance capability of high nickel cathodes. The porous LiNi0.8Mn0.1Co0.1O2 nanoparticle/graphene aerogel (nNMC-811/GA) composite is composed of nNMC-811 and graphene that act as a bridge for electron transfer and acceleration of lithium ion diffusion. nNMC-811 and nNMC-811/GA cathodes characterization data with techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectroscopy (XPS) are discussed. Both Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission Electron Microscopy (TEM) made clear observations of the uniform distribution of the cathode active powders over the 3D graphene aerogel structure. The electrochemical performance of the nNMC-811 and nNMC-811/GA cathodes was evaluated by the galvanostatic charge-discharge measurement between 2.5 V and 4.5 V at room temperature using a computer-controlled battery tester. In addition, variable speed capacity ratios (C-rate), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) analyzes were also performed. nNMC-811/GA hybrid composite structure delivers a specific capacity of 183.15 mAhg−1 at C/2 after the 500th cycle. It is understood from the FE-SEM images taken after the cycle that there is no deterioration in the structure. According to results, it was observed that the 3D porous structure of the nNMC-811/GA composite facilitated the mobility of Li+ ions, and the excellent electrochemical performances of the cathodes were improved due to the increasing defects as well as the electrical conductivity of GA.

Porous carbohydrate–graphene aerogels synthesized by green method as electroactive supercapacitor materials

Various graphene derivatives have been known as electrode-active materials for fabricating supercapacitors. Interconnected graphene networks with adjustable porous structures, i.e., 3D graphene aerogels (GAs), can control the restacking of graphene sheets very well and, thus, lead to the enhanced performance supercapacitors. In this study, carbohydrates (sucrose and fructose) were used to make two types of 3D porous carbohydrates–graphene aerogels, sucrose-graphene aerogel (SCR) and fructose-graphene aerogel (FRC). Carbohydrates operate as a cross-linking and reductant agent. Voltammograms of supercapacitor electrodes based on the FRC and SCR indicate a more rectangular shape with a larger area and a superior current than the GA (graphene aerogel without using carbohydrates) electrode. They have better capacitive performance, more electron transportation ability, and higher specific capacitance (CS) values than GA. The supercapacitor electrodes based on FRC, SCR, and GA demonstrate the CS values of 257.2 F g −1, 221.0 F g −1, and 95 F g −1 at ѵ = 10 mV.s−1, respectively. Improvement in the performance of SCR and FRC supercapacitor electrodes, in comparison to GA, is attributed to the porous interconnected feature of their structures and their suitable available surface area, which facilitates electron and ion transportation throughout graphene networks. These supercapacitors also show excellent stability after recording 5000 consecutive voltammograms.

One-Step Synthesis of 3D Graphene Aerogel Supported Pt Nanoparticles as Highly Active Electrocatalysts for Methanol Oxidation Reaction.

Nowadays, two of the biggest obstacles restricting the further development of methanol fuel cells are excessive cost and insufficient catalytic activity of platinum-based catalysts. Herein, platinum nanoparticle supported graphene aerogel (Pt/3DGA) was successfully synthesized by a one-step hydrothermal self-assembly method. The loose three-dimensional structure of the aerogel is stabilized by a simple one-step method, which not only reduces cost compared to the freeze-drying technology, but also optimizes the loading method of nanoparticles. The prepared Pt/3DGA catalyst has a three-dimensional porous structure with a highly cross-linked, large specific surface area, even dispersion of Pt NPs and good electrical conductivity. It is worth noting that its catalytic activity is 438.4 mA/mg with long-term stability, which is consistent with the projected benefits of anodic catalytic systems in methanol fuel cells.. Our study provides an applicable method for synthesizing nano metal particles/graphene-based composites.

Electron-interactive 1D porous vertical NiCo2O4 nanowire and 3D N-doped graphene aerogel enable high hydroxyl-ion adsorption capacity for superior energy storage

Supercapacitors are a kind of highly efficient energy-storage device with long cycle life and high power density, however, their specific capacitance is insufficient for further application and development. In this work, a novel composite with one-dimensional (1D) NiCo2O4 nanowire arrays (NiCo2O4-NWA) vertically supported on three-dimensional (3D) nitrogen-doped graphene aerogel (NGA) is designed and facilely realized by hydrothermal reaction and thermal treatment. The NiCo2O4 nanowires, with length of ∼1 μm and diameter of ∼25 nm, display a porous structure and are regularly arranged on both sides of the sheets in nitrogen-doped graphene aerogel. The aerogel-supporting NiCo2O4 nanowires demonstrate a remarkably high specific capacitance of 2742 F g−1 at 1 A g−1, and an outstanding cyclic stability with capacitance retention of 90% even after 10,000 cycles at 80 A g−1. The density functional theory calculation shows the narrow band gap (0.32 eV) and strong electronic interaction and hydroxyl-ion adsorption effect of NiCo2O4 supported on NGA, resulting in superior specific capacitance and energy storage performance. The 3D nitrogen-doped graphene aerogel supporting 1D nanowire arrays represent a promising high-performance electrode material for application in the supercapacitors and other electrochemical energy-conversion and storage equipment.

Nano zero-valent iron functioned 3D printing graphene aerogel electrode for efficient solar-driven biocatalytic methane production

To address the urgent need for developing carbon-neutral technologies, microbial electrosynthesis (MES), as an important contributor to the renewable energy field, can convert carbon dioxide to multi-carbon chemicals using microbes serving as living catalysts at the cathode. However, the performance of the cathode is restricted by the weak electrochemical reaction kinetics of the organisms, the specific area of the electrode, and the mass transfer under high current. Herein, we report a facile 3D-printed graphene aerogel (GA) electrode built with a nanozero-valent iron (NZVI)-functionalized graphene ink. The 3D-printed GA electrode was designed to possess hierarchical pores with an enhanced high specific surface area for microbial colonization while ensuring mass transfer. NZVI can assist in-situ hydrogen generation, facilitating biofilm formation and methane (CH4) production in the indirect electron transfer pathway. Consequently, the optimized 3D-printed electrode achieved a maximum CH4 production rate of 6993 ± 832 mmol/m2/d with a faradaic efficiency of 83.7%, which increased by 3.24-fold to the carbon felt electrode. In addition, integrating the proposed cathode into a PV-electrolyzer cell yielded a solar-to-CH4 efficiency of 4.70%. This study provides a unique method for the development of advanced cathodes and underscores the potential of integrating MES with renewable energy technologies.

Enhancing Electrochemical Performance of Aluminum-Oxygen Batteries with Graphene Aerogel Cathode.

Aluminum-oxygen batteries (AOBs) own the benefits of high energy density (8.14kWh kg-1), low cost, and high safety. However, the design of a cathode with high surface area, structure integrity, and good catalytic performance is still challenging for rechargeable AOBs. Herein, the fabrication of a robust self-supporting cathode using 3D graphene aerogel (3DGA) for rechargeable AOBs is demonstrated. Electroanalysis showed that the 3DGA presented good catalytic activity in both oxygen reduction and evolution reactions, which allowed the AOB to operate for >90 cycles with low overpotentials at a current density of 0.2mA cm-2, and a high Coulombic efficiency of ca. 99% using ionic liquid as electrolyte. In comparison, the cell with the carbon paper cathode can only cycle for 50 rounds. The excellent cyclic performance can be attributed to the porous structure, large surface area, good electric conductivity, and catalytic activity of the 3DGA, which is prospective to be applied for other metal-air batteries, fuel cells, and supercapacitors.

Electrochemical elucidation of phosphorus-doped and 3D graphene aerogel surface-modified SiOx porous nanocomposite electrode material for high-performance lithium-ion batteries

Silicon oxide (SiOx) is promising as an earth abundant eco-friendly cost-effective anode material for lithium-ion batteries (LIBs), boasts a higher capacity compared to commercial graphite, garnering significant interest. Nevertheless, its practical application is hindered by issues related to poor cycling performance and low electronic conductivity. In this investigation, graphene aerogel-wrapped (GA) red phosphorus (P) doped SiOx (P-SiOx@GA) composite material is successfully constructed through ball-milling followed by freeze-drying and thermal treatment processes. The prepared materials are characterized the physico-chemical properties. The electrochemical performance is evaluated through Li-ion half and full (LiFePO4//P-SiOx@GA) cells configuration. The synthesized P-SiOx@GA electrode exhibits outstanding cyclic performance, demonstrating a specific capacity of 1094 mAh g−1 at 0.5C with a capacity retention of 80.3 % over 200 cycles in half-cell test. Furthermore, it demonstrates superior rate capability and delivers a reversible rate capacity of 754 mAh g−1 at 2C. Besides, the Li-ion punch cell configuration of LiFePO4//P-SiOx@GA shows good reversible capacity of 1.4 mAh at 0.5C over 300 cycles. The doping of P and porous 3D structure of GA forms an SiOx matrix network is facilitate the establishment of a 3D conductive pathway for electron transport and Li+ diffusion but also acts as a flexible matrix to accommodate the volume changes of SiOx. Therefore, the results and way of preparation promotes a practical feasibility of high-performance Si-based Li-ion batteries applications.

Optimizing the micro/mesoporous structure of hierarchical graphene aerogel for CO2 capture by controlling the oxygen functional groups of graphene oxide

BackgroundGraphene aerogels as solid porous adsorbents are great candidates for CO2 adsorption based on their tunable hierarchical pore structure and oxygenated groups on graphene oxide can control the self-assembly and pore structure of graphene aerogels. MethodsModified Hummer's method was used to synthesize graphene oxides by using various levels of H2SO4, KMnO4, and H2O2 and 3D graphene aerogels were synthesized via the hydrothermal and freeze-drying method. FTIR, RAMAN, XRD, FE-SEM, and BET analysis were used for characterizations. Significance findingsThe effect of graphite oxidation conditions on the hierarchical porous structure of graphene aerogel for CO2 adsorption was investigated. The graphene aerogel with the high meso and micro surface areas and the highest Sm/ST value (micro surface area/total micro and meso surface area) of 33% and also, the adequate macropores was achieved using high dosage of H2SO4 in the graphene oxidation process led to the highest CO2 adsorption capacity of 1.72 mmol/g. increasing the H2O2 dosages increased the macropores in the aerogel structure and improved the value of Sm/ST leading to an increase in the CO2 adsorption capacity. The high content of KMnO4 led to low Sm/ST value and fewer macropores and decreased the CO2 adsorption capacity (1.04 mmol/g).

Waste biomass-based 3D graphene aerogels for high performance zinc-ion hybrid supercapacitors.

Biomass-based 3D graphene aerogels were explored as cathode materials for the fabrication of high-performance zinc-ion hybrid supercapacitors. These hybrid supercapacitors delivered a high specific capacitance of ∼353.1 F g-1 at a current density of 0.1 A g-1 and maximum specific energy and power of 158.9 W h kg-1 (at 84 W kg-1 of specific power) and 14.8 kW kg-1 (at 77.2 W h kg-1 of specific energy), respectively. These devices exhibited a remarkable rate capability at high current densities and excellent capacity retention, retaining ∼84.2% of their capacity with ∼100% coulombic efficiency up to 10 000 cycles at 10 A g-1.

Alternating current assisted preparation of three-dimensional graphene aerogels and the application in electromagnetic interference shielding

Three-dimensional (3D) graphene aerogels (GA) have obtained significant attention across various fields due to their lightweight and porous properties. Nevertheless, the development of a scalable and environmentally friendly method for synthesizing self-supported 3D GA remains a challenge. In this study, we introduced an innovative method for the preparation of 3D GA using alternating current (AC) strategy, which fully used the characteristic of AC's constantly changing current direction to attract graphene oxide (GO) particles to the electrode surface and subsequently reduced them to reduced GO (rGO). Ultimately, GA is self-assembled on the electrode surface under repeated cycles. An applied AC signal with optimal parameters produced a porous GA with an oxygen content of 10.76 at%, which is 66.67% less than that of the original GO. When applying GA to electromagnetic interference (EMI) shielding, it provides a maximum specific shielding effectiveness of 9100 dB cm2 g−1 at X-band due to the repeated reflection and absorption of electromagnetic waves (EMWs) by the abundant pore wall. Furthermore, the shielding effectiveness can be significantly improved to 68.60 dB at the X-band for a multilayer GA. Notably, it is worth emphasizing that this AC-assisted synthesis method has proven its adaptability to various metal electrodes, such as cost-effective iron and copper. Importantly, this method avoids the high-temperature treatments and the use of environmentally hazardous chemicals. It is envisaged that this environmentally friendly and low-cost approach will greatly facilitate the cost-effective production of 3D GA with diverse applications.

Fabrication and performance of a 3D porous graphene aerogel-supported Ni–ZnS composite photocatalyst

The performance of a Ni–ZnS/three-dimensional (3D) graphene aerogel (GA) composite photocatalyst for hydrogen production was investigated in this study. Ni–ZnS precursor was loaded on 3D graphene aerogel through a simple solvothermal method, and the composite Ni–ZnS/GA was successfully synthesized. The average hydrogen production rate of Ni–ZnS/GA-4 can reached 12.06 mmol·g−1·h−1 and after three cycles for 9 h, the hydrogen production efficiency remained at 97.81%. Ni2+ doping provided suitable band gap for ZnS, which could fully absorb sunlight, and made the photo-generated carriers have sufficient redox ability. The large specific surface of 3D graphene gel enhanced the dispersion of nano Ni-ZnS, boosted photo-generated carrier separation, and accelerated sacrificial agent adsorption. The Ni–ZnS/GA composite had more active adsorption sites and photocatalytic reaction centers, improving photocatalytic activity and efficiency.

Lightweight Nanofiber‐Reinforced Pyrrole‐Reduced Graphene Oxide Aerogel for Pressure Sensor and Oil/Water Separation Material

AbstractThe mechanical brittleness of graphene aerogel becomes the main defect that restrains their multifunctional application due to the strong π–π stacking and Van der Waals forces between graphene nanosheets. Herein, a novel and simple 1D nanofiber‐reinforced 2D pyrrole‐reduced graphene oxide (GO) to construct a 3D graphene aerogel (GA) is developed. The pyrrole effectively reduces GO to graphene and the in situ polymerized polypyrrole (PPy) can improve the conductivity of GA. Benefiting from the synergistic reinforcement of cellulose acetate (CA) electrospun nanofiber and crosslinker PPy on the graphene framework, the lightweight GA exhibits satisfactory mechanical properties. The assembled flexible piezoresistive sensor shows a high sensitivity of 32.39 kPa−1 and a wide detection range of up to 65.3 kPa, which can be able to withstand more than 10 000 loading‐unloading cycles. It has a broad application prospect in human motion and health signal monitoring as a high‐performance wearable pressure sensor. Particularly, the porous GA is also proved to be a high‐efficiency oil/water separation material with a strong adsorption capacity (56.9–115.2 g g−1) for various oils and organic solvents.

Size Effect of Graphene Oxide on Graphene-Aerogel-Supported Au Catalysts for Electrochemical CO2 Reduction.

The lateral size of graphene nanosheets plays a critical role in the properties and microstructure of 3D graphene as well as their application as supports of electrocatalysts for CO2 reduction reactions (CRRs). Here, graphene oxide (GO) nanosheets with different lateral sizes (1.5, 5, and 14 µm) were utilized as building blocks for 3D graphene aerogel (GA) to research the size effects of GO on the CRR performances of 3D Au/GA catalysts. It was found that GO-L (14 µm) led to the formation of GA with large pores and a low surface area and that GO-S (1.5 µm) induced the formation of GA with a thicker wall and isolated pores, which were not conducive to the mass transfer of CO2 or its interaction with catalysts. Au/GA constructed with a suitable-sized GO (5 µm) exhibited a hierarchical porous network and the highest surface area and conductivity. As a result, Au/GA-M exhibited the highest Faradaic efficiency (FE) of CO (FECO = 81%) and CO/H2 ratio at -0.82 V (vs. a Reversible Hydrogen Electrode (RHE)). This study indicates that for 3D GA-supported catalysts, there is a balance between the improvement of conductivity, the adsorption capacity of CO2, and the inhibition of the hydrogen evolution reaction (HER) during the CRR, which is related to the lateral size of GO.

Dually inner-porous composites with Co@C prismatic rods anchored into graphene aerogel toward superior electromagnetic wave absorbing materials

For electromagnetic wave absorbing materials, integration of excellent electromagnetic wave absorbing property in view of strong electromagnetic wave absorbing intensity and wide effective absorption bandwidth with a very low usage, and a ultralight weight into one material is still challenging. Herein, composites of Co@C@GA (CCGA: CCGA-1, CCGA-2, CCGA-3 and CCGA-4) with a dually three-dimensional (3D) and porous structure were obtained through introducing a prismatic rod shaped Co@C prepared by calcining Co-MOF-74–3D graphene aerogel (GA). At a loading of only 12 wt%, all the CCGA with a wide weight ratio of graphene oxide to Co@C (2:1, 4:3, 1:1 and 4:5) exhibit excellent electromagnetic wave absorption properties. A minimum reflection loss (RLmin) of − 70.28 dB at 12.28 GHz with the thickness of 2.913 mm for CCGA-3 and the maximum effective absorption bandwidth (EAB) of 7.12 GHz at a thickness of 2.520 mm for CCGA-4 are achieved. The low filling ratio, the high RLmin intensity, the wide EAB and the compatibility of the two components in a broad compositional range for losing electromagnetic waves are impressive. Co@C with inner-porous and prismatic rod bundles like unique morphology is confirmed to be very important and can endow CCGA with greatly enlarged interface, enhanced conductivity and proper magnetic property, leading to the effective tuning of electromagnetic property and impedance matching condition.

The combination of MoS2/reduced graphene oxide composite electrode and ionic liquid for high-temperature supercapacitor

Increasing the temperature range of electrochemical energy storage devices represents one of the most interesting sectors in the energy field. In fact, there are countless applications in which the current temperature range is not able to satisfy the applicant's requests and, unfortunately, traditional energy storage devices are not able to sustain these harsh conditions. Among all, supercapacitors emerged as possible candidates to solve this problem, but a lot of research efforts should be spent to overcome the actual limitations. Herein we report on the fabrication of a supercapacitor able to achieve the working temperature of 200 °C exploiting a 3D graphene aerogel decorated with nanostructured MoS2 in combination with an ionic liquid electrolyte able to warranty an effective energy storage performance even at high temperature. The proposed device exhibits capacitance values up to 210 F/g (corresponding to 365 mF/cm2) at 200 °C with a voltage window equal to 2.1 V, resulting in a 20 % improvement of performance from RT to 200 °C, overcoming the existing literature in the field. In fact, the rated value corresponds to an energy of 0.22 Wh dm−3 in a coin-cell embodiment, one order of magnitude higher compared to the device which reaches the highest temperature commercially available of 175 °C. Moreover, the same device can practically be employed in the whole temperature range from 25 °C up to 250 °C with small performance fluctuations.

Ultrafast air-plasma reduction-exfoliation of graphene oxide aerogel at room temperature for capacitive deionization

Graphene produced by reducing graphene oxide has been an emerging candidate for capacitive deionization (CDI) and energy storage. However, the key factor for its commercial applications depends on the production methods that essentially determine its cost-effectiveness. Herein, we report a facile air-plasma method to achieve the highly efficient reduction of graphene oxide aerogel within 1 s, at room temperature, and without the need of any chemicals. It is demonstrated that by adjusting the plasma power ranging from 20 to 150 W, the interlayer distance between graphene layers, reduction degree (oxygen content), specific surface area, specific capacitance, and salt adsorption capacity can be tuned effectively for the obtained 3D graphene aerogel (GA). We also verify the validity of the air-plasma method for fabricating composite of GA with long Ag (or MnO2) nanowires, which can well maintain their unscathed 1D structure and redox activity for capturing ions. This air-plasma strategy, owing to its simplicity, time-saving and cost-effectiveness, opens a new pathway to large-scale synthesis of high-quality graphene with promising applications in CDI and beyond.

Electrochemical aptasensor based on 3D graphene aerogel for prostate specific antigen detection

Prostatic cancer threatens the lives and health of numerous male patients all over the world. As a single-chain glycoprotein, prostate specific antigen (PSA) can be used to perform prostate cancer screening. At present, there are still problems such as time-consuming and low sensitivity in hospital detection. At the same time, electrochemical immunosensor technology has received a lot of attention due to its benefits, including high sensitivity, good selectivity, low usage and cost, and so on. Electrocatalysts are typically used to build electrochemical immunosensors for signal amplification in the recent years to realize sensitive detection of cancer biomarkers such as PSA. In recent years, three-dimensional nanomaterials have been widely used in the study of electrocatalysts, but the study of the sensitivity for PSA detection is still very scarce. The present work reported the application of a 3D graphene aerogel(GA)/AuNPs/Nafion electrochemical platform for highly sensitive PSA quantification. The electrochemical immunosensor has been designed by immobilizing aptamers on the screen-printed electrode (SPE) surface modified by GA/AuNPs/Nafion. Scanning electron microscopy (SEM), Raman spectra, and electrochemical characterization demonstrated the successful combination of GA/AuNPs/Nafion/SPE. Based on electrochemical impedance spectroscopy (EIS), the proposed immunosensor has demonstrated excellent electrochemical performance, exhibiting sensitive and stable responses for electrochemical detection of PSA ranging from 0.05 to 50 ng∙mL−1 with a limit of detection (LOD) of 0.0306 ng∙mL−1. This study has great potential application in PSA detection and provides a valuable reference for point-of-care testing (POCT) of prostate cancer.