Introduction Of rGO Research Articles

PdPbAg alloy NPs immobilized on reduced graphene oxide/In2O3 composites as highly active electrocatalysts for direct ethylene glycol fuel cells.

rGO-modified indium oxide (In2O3) anchored PdPbAg nanoalloy composites (PdPbAg@rGO/In2O3) were prepared by a facile hydrothermal, annealing and reduction method. Electrochemical tests showed that the as-prepared trimetallic catalyst exhibited excellent electrocatalytic activity and high resistance to CO poisoning compared with commercial Pd/C, mono-Pd and different bimetallic catalysts. Specifically, PdPbAg@rGO/In2O3 has the highest forward peak current density of 213.89 mA cm−2, which is 7.89 times that of Pd/C (27.07 mA cm−2). After 3600 s chronoamperometry (CA) test, the retained current density of PdPbAg@rGO/In2O3 reaches 78.15% of the initial value. Its excellent electrocatalytic oxidation performance is attributed to the support with large specific surface area and the strong synergistic effect of PdPbAg nanoalloys, which provide a large number of interfaces and achievable reactive sites. In addition, the introduction of rGO into the In2O3 matrix contributes to its excellent electron transfer and large specific surface area, which is beneficial to improving the catalytic ability of the catalyst. The study of this novel composite material provides a conceptual and applicable route for the development of advanced high electrochemical performance Pd-based electrocatalysts for direct ethylene glycol fuel cells.

Insight into a novel microwave-assisted W doped BiVO4 self-assembled sphere with rich oxygen vacancies oriented on rGO (W-BiVO4-x/rGO) photocatalyst for efficient contaminants removal

A novel W doped BiVO4 with rich oxygen vacancies (OVs) oriented on reduced graphene oxide (rGO) photocatalyst (W-BiVO4-x/rGO) was developed by a simple one-step microwave hydrothermal method for efficient removal of ciprofloxacin (CIP) and chlortetracycline (CTC) under visible light. The synergistic effect of W doping, BiVO4 with OVs, and rGO on the enhancement of photocatalytic activity was clarified from experimental and Density Functional Theory (DFT) calculations results. W doping significantly improved the density of photo-generated charge carriers. The introduction of rGO enlarged the specific surface area, expanded the light absorption range, and promoted the charge transfer of BiVO4. OVs both narrowed the band gap and enhanced the generation of O2−. W doping and OVs both enhanced the interactions between BiVO4 and rGO. The CIP degradation rate constant of W-BiVO4-x/rGO photocatalyst was 1.73, 5.32, 6.43, and 10.70 times higher than those of W-BiVO4/rGO, BiVO4/rGO, W-BiVO4, and BiVO4, respectively. Besides, W-BiVO4-x/rGO photocatalyst prepared by microwave hydrothermal method exhibited higher photocatalytic activity and better combination between materials. This study offers a new strategy to address the problem of antibiotic residues in wastewater.

High-activity daisy-like zeolitic imidazolate framework-67/reduced grapheme oxide-based colorimetric biosensor for sensitive detection of hydrogen peroxide

Colorimetric biosensors, based on enzyme-like nanomaterials, have come into the spotlight in virtue of their visual detection. Herein, a daisy-like zeolitic imidazolate framework-67/reduced grapheme oxide (ZIF-67/rGO) nanozyme with unique 3D hierarchical structures has been designed to realize visual detection of hydrogen peroxide (H2O2) that is recognized as a strong oxidizing agent or reactive oxygen species associated with oxidative stress in biological systems. The daisy-like ZIF-67/rGO is prepared by a facile one-step liquid-phase method conducted under room temperature. The successful introduction of rGO endows the daisy-like ZIF-67/rGO nanozyme with abundant porous structure, high specific surface area, and good charge transfer capability, which significantly accelerates the adsorbability and recognition towards the substrates and the oxidation rate of TMB-H2O2 reaction, and thus improving the nanozyme activity observably. It is conductive to nanozyme-modulated H2O2 determination. The established colorimetric biosensor platform based on ZIF-67/rGO nanozyme exhibits remarkable sensitivity and high specificity for the application in visual detection of H2O2. The detection limit of ZIF-67/rGO-based biosensor platform is as low as 3.81 μM, which is nearly 8 times lower than that of ZIF-67-based biosensor platform. Moreover, its potential applicability as an ideal platform for colorimetric biosensors is demonstrated by testing the concentration of H2O2 in milk samples, which sheds light on the promising application of the proposed biosensing system in point-of-care detection.

Construction and investigation on perovskite-type SrTiO3@ reduced graphene oxide hybrid nanocomposite for enhanced photocatalytic performance

To construct rGO/SrTiO 3 nanocomposite using a facile hydrothermal synthetic approach for enhanced photocatalytic application. In this study, the structural, morphological, elemental, surface compositional, optical properties, and photocatalytic activity of rGO/SrTiO 3 nanocomposites were investigated. From the various analyses, the synthesized nanocomposites produce heterostructure formation between reduced graphene oxide (rGO) and SrTiO 3 . By the optical analysis, the results showed that prepared ESG 10 photocatalyst has efficient charge separation and migration with suppressed recombination probability of photogenic charge carriers. The photocatalytic reactivity of the synthesised photocatalysts was evaluated by methylene blue (MB) aqueous dye and 2-nitrophenol (2-NP) degradation under UV-Visible (UV-Vis.) light irradiation. Therefore, the ESG 10 photocatalyst exhibited a maximum removal efficiency of 91% and 81% over MB dye and 2-NP, respectively. In contrast to other samples, the introduction of rGO could suggestively enhance the photocatalytic activity by increasing the amount of rGO, and the degradation rate was also reduced after the optimal level of rGO. The radicals involved in the degradation process are investigated by scavenger experiments. The recycle experiment reveals that the ESG 10 photocatalyst does not show any major loss of activity after 4 consecutive runs. Meanwhile, the possible reaction mechanism and interface characteristics are also discussed. • The perovskite rGO/SrTiO 3 nanocomposite was prepared via facile hydrothermal route. • rGO possess interfacial contact with E SRT provides more charge transport ability. • ESG 10 photocatalyst achieves 91% of MB dye degradation efficiency. • Possible degradation mechanism and charge transfer pathways were discussed. • The ESG 10 photocatalyst was utilized for 4 recycle runs with good stability.

Highly efficient noble-metal-free NiS/rGO/Cd0.3Zn0.7S nanorods in visible-light-driven H2 evolution with enhanced surface photoinduced charge transfer

Effectively improving the separation efficiency of photoinduced carriers is of crucial importance for the design of photocatalysts with excellent hydrogen evolution activity. Herein, by combining CdZnS nanorods with rGO and further depositing NiS as cocatalysts, the separation and transfer of photoinduced carriers for CdZnS is significantly improved. Without using any noble metals as cocatalysts, the optimal NiS/0.5%rGO/C0.3Z0.7S exhibits an outstanding H2 evolution activity of 1058 μmol h−1 under visible light illumination, which is evidently better than that of pure CdZnS nanorods and most CdZnS-based photocatalysts reported previously. Our study indicates that the introduction of rGO can effectively assist the transfer of photoinduced electrons and evenly distributed NiS on the surface, as the active center for H2 evolution reaction, can easily capture photoinduced electrons to participate in photocatalytic process. Thus, the synergistic effect of rGO and NiS is considered to be the main cause for the improved photocatalytic performance. This work could offer a facile and low-cost strategy for the construction of composite photocatalysts with high-efficiency hydrogen generation activity.

Rational design of three-dimensional nickel borate/graphene nanoarrays for boosted photoconversion of anthropogenic CO2

Direct photoconversion of diluted CO2 into solar fuels has theoretically and practically become a hot research topic. However, the low yields and poor selectivity of carbonaceous products hampered by the H2 evolution reaction is still a challenge for its practical application. Herein, we demonstrate a three-dimensional (3D) nickel borate/graphene nanoarrays (Ni-Bi/G) for diluted CO2 photoreduction with boosted activity and selectivity. In simulated flue gas with 10% CO2, the pristine Ni-Bi displays a low activity and low CO selectivity of 41.8%, indicating its tendency of producing H2 in diluted CO2. However, after growing Ni-Bi nanoarrays onto graphene nanosheets, the optimized 3D Ni-Bi/G exhibits a high CO selectivity of 84.9% with a CO production rate of 5.1 μmol h−1, which is about 2 times of the blank sample. The improved performance can be attributed to the synergistic effect of the introduction of rGO and unique 3D structure, which are conducive not only to accelerate the separation of photogenerated charges, but also to enrich active sites and enhance CO2 adsorption. This work provides fundamental guidance to the rational design of well-designed hierarchical catalysts for photoconversion of low concentration CO2.

Near-infrared responsive reduced graphene oxide supported CuS: Enhanced electrocatalytic hydrogen evolution performance

Various reduced graphene oxide supported CuS (RGO-CuS) composites were obtained via a hydrothermal way in this work. The as-obtained RGO-CuS with a low bandgap of ~1.24 eV showed significant light absorption in near-infrared (NIR) region. In acidic media, the optimized 0.1RGO-CuS needed an overpotential of 179 mV (at 10 mA cm−2) to trigger the hydrogen evolution reaction under NIR light. And the lowest Tafel slope of 0.1RGO-CuS (61 mV dec−1), suggesting that the photoelectrocatalytic hydrogen evolution was performed under the Volmer-Heyrovsky mechanism. The 0.1RGO-CuS displayed a good durability after 5000 cycles in acid. According to the results of EIS measurement, both NIR irradiation and RGO modification could effectively lower charge transfer resistance and improve charge transport rate of the photoelectrochemical process. The introduction of RGO could improve the electron and hole separation ability of the photoelectrochemical process, which resulted in an enhanced photoelectrocatalytic HER performance.

Synthesis of δ–MnO2/Reduced Graphene Oxide Hybrid In Situ and Application in Mg–Air Battery

Different forms of δ–MnO2 were constructed with their reduction sites anchored on non-support or other supports. Morphology, composition, and electrochemical properties of MnO2 and its hybrids were analyzed. Results revealed that MnO2/reduced graphene oxide (rGO) layered hybrid showed a higher BET surface area due to the synergistic effect on the introduction of rGO and the morphologic transformation of anchored MnO2. MnO2/rGO–2 exhibits a higher ratio of Mn3+: Mn4+ content, a better adsorption performance for O2, and a lower charge-transfer resistance when respect to pristine δ–MnO2. Compared with other MnO2/rGO hybrids, porous MnO2/rGO-2 layered hybrid exhibits the best electrochemical property: a closer four-electron process (3.95), a more positive E onset (0.92 V vs RHE), and superior long-term durability (98.5% after 25,000 s). Especially, a mechanically reusable Mg–air battery with MnO2/rGO–2 cathode catalyst only exhibits a 5% decay for 264 h.

Novel method for synthesis of reduced graphene oxide–Cu2S and its application as a counter electrode in quantum-dot-sensitized solar cells

Reduced graphene oxide (rGO)-Cu2S as a counter electrode (CE) is synthesized by a novel electrochemical method for quantum-dot-sensitized solar cell (QDSSC) applications. One-step electrochemical co-reduction using cyclic voltammetry for various cycles (3, 5, and 7), followed by sulfurization, is employed to obtain rGO-Cu2S CEs on the surface of fluorine-doped tin oxide. Compared with Pt and Cu2S CEs, rGO-Cu2S CEs (5) display lower charge transfer resistance (Rct) and higher electrocatalytic activity. This is because the introduction of rGO along with Cu2S in the rGO-Cu2S surface enhances the surface area and charge transfer and improves the electrical contact between the CEs and substrate surface. An optimum power conversion efficiency (η) of 4.26% is recorded for rGO-Cu2S (5) in CdS/CdSe/ZnS QDSSCs using a polysulfide electrolyte. QDSSCs with rGO-Cu2S (5) showed the highest short-circuit current density (Jsc) of 17.2 mA cm−2, open circuit voltage (Voc) of 0.57 V, and fill factor of 44%. The obtained results are superior to those for Cu2S (3.77%) and Pt (2.44%) CEs. Additionally, the preparation method of rGO-Cu2S CEs is more scientific, less time-consuming, economical, and easy.

Effective Poly (Cyclotriphosphazene-Co-4,4'-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics.

The development of excellent drug adsorbents and clarifying the interaction mechanisms between adsorbents and adsorbates are greatly desired for a clean environment. Herein, we report that a reduced graphene oxide modified sheeted polyphosphazene (rGO/poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol)) defined as PZS on rGO was used to remove the tetracycline (TC) drug from an aqueous solution. Compared to PZS microspheres, the adsorption capacity of sheeted PZS@rGO exhibited a high adsorption capacity of 496 mg/g. The adsorption equilibrium data well obeyed the Langmuir isotherm model, and the kinetics isotherm was fitted to the pseudo-second-order model. Thermodynamic analysis showed that the adsorption of TC was an exothermic, spontaneous process. Furthermore, we highlighted the importance of the surface modification of PZS by the introduction of rGO, which tremendously increased the surface area necessary for high adsorption. Along with high surface area, electrostatic attractions, H-bonding, π-π stacking and Lewis acid-base interactions were involved in the high adsorption capacity of PZS@rGO. Furthermore, we also proposed the mechanism of TC adsorption via PZS@rGO.

RGO modified R-CeO2/g-C3N4 multi-interface contact S-scheme photocatalyst for efficient CO2 photoreduction

Construction of multi-interface contact step-scheme (S-scheme) photocatalyst is a promising pathway to achieve high-electron transfer efficiency for photocatalytic CO2 reduction. In this paper, g-C3N4 nanosheets were selected as the main photocatalyst, rod-like CeO2 (R-CeO2) with unique Ce4+→Ce3+ conversion property and rGO were loaded on the g-C3N4 surface to construct 2D-1D-2D sandwich photocatalyst. The yields of CO and CH4 were about 63.18 and 32.67 μmol/g after 4 h when the rGO/R-CeO2/g-C3N4 was used as catalyst, which were about 4 and 6 times higher than that of pure CN, respectively. Cyclic experiments proved that the composite had excellent photocatalytic and material stability. Photoelectrochemical tests showed that the construction of S-scheme electron transfer model and the introduction of rGO can great enhance the electron transmission and separation of photogenerated electron-hole pairs. CO2 adsorption test identified that the loading of R-CeO2 and rGO obviously enhanced the CO2 adsorption ability of pure g-C3N4. Density functional theory (DFT) calculations used to analyze the electron transfer path and the formation of the build-in electric field at the semiconductor interface. In-situ FTIR and 13CO2 element-tracer detection carried out to research the process of CO2 photoreduction. A possible multi-interface contact S-scheme electron transfer mechanism for enhanced CO2 photoreduction activity has been discussed.

In-situ Hydrothermal Synthesis of SnS2/SnO2/rGO Nanocomposites with Enhanced Photogenerated Electron Transfer for Photoreduction of CO2 to CH4

The ternary SnS2/SnO2/rGO nanocomposites were successfully designed and fabrication for promoting the separation and transfer of photogenerated electrons. Based on the introduction of rGO, adjusting the content of SnS2 can tune the energy of the conduction band to a suitable position, which can promote the activity and selectivity for photocatalytic reduction of CO2. The internal mechanism of the energy band structure that determines the separation and transport of photogenerated electrons was further studied to establish the relationship between the energy band and the photocatalytic performance of activity and selectivity. This work provides some references for the field of photocatalytic decarburization.

Two-dimensional flower-like cobalt-porphyrin MOF/rGO composite anodes for high-performance Li-ion batteries

In this study, a novel flower-like Co-TCPP MOF/rGO composite has been successfully synthesized by combining cobalt meso-tetrakis(4-carboxyphenyl) porphyrin (Co-TCPP MOF) and reduced graphene oxide (rGO) via a simple one-pot solvothermal method. The introduction of rGO not only reduces the stacking of MOF effectively, but also facilitates the formation of a continuous conductive network composed of entangled graphene and Co-TCPP MOF in favor of rapid electron transport. More importantly, the ultrathin lamellar structure of Co-TCPP MOF/rGO composite nanosheets could expose more active sites, reduce the diffusion distance of Li+ to the internal electroactive sites, and improve the overall electrical conductivity of the electrode due to their sufficient contact with carbon. When evaluated as anode materials for lithium-ion batteries, the flower-like Co-TCPP MOF/(15 wt%)rGO composite electrode delivers a specific capacity of 1050 mAh g−1 at 100 mA g−1 after 100 cycles. A specific capacity of 650 mAh g−1 can be remained after 300 cycles even at 1000 mA g−1. The superior performance of the Co-TCPP MOF/(15 wt%)rGO composite electrode could be attributed to the introduction of rGO, which prevents the stacking growth of Co-TCPP MOF crystals along the horizontal direction and improves the electrical conductivity.

Construction of mesoporous C3N4/rGO composite with enhanced visible light photocatalytic activity

A feasible template-free calcination method was carried out to synthesize the hybrid of mesoporous graphitic carbon nitride (mpg-C3N4) and reduced graphene oxide (rGO) with highly efficient photocatalytic ability. The morphology and microstructure of the heterojunction photocatalysts (mpg-C3N4/rGO) were characterized and discussed. The results revealed that the mpg-C3N4/rGO exhibited high surface area 84.974 m2/g and mesoporous morphology, which provides tremendous contact area for rGO sheets. The introduction of rGO led to red-shift of the absorption spectrum and improved the conductive property of the mpg-C3N4/rGO, facilitating the transfer of photo-generated electrons. The formation of heterojunction provided an efficient transfer pathway to separate the photoinduced carriers. The mpg-C3N4/rGO heterojunction exhibited an enhanced visible light-activated degradation of rhodamine B (RhB). The RhB dye was almost removed within 40 min, exhibiting higher photocatalytic efficiency about 5.7 times that of pristine g-C3N4. The synergetic effect of mesporous framework and interface heterojunction contributes to the prominent performance of the photocatalyst.

Spatial confinement and electron transfer moderating Mo[sbnd]N bond strength for superior ammonia decomposition catalysis

Advanced catalysts for ammonia (NH3) decomposition reaction hold great promise in the area of renewable energy. In this work, highly dispersed molybdenum nitride (MoN/Mo2N) nanocrystals anchored on in-situ assembled two-dimensional (2D) mesoporous silica/reduced graphene oxide (rGO) hybrid nanosheets (MoN/SBA-15/rGO and Mo2N/SBA-15/rGO) were designed and synthesized as active and stable catalysts for COx-free H2 generation via NH3 decomposition. Benefiting from well-defined molybdenum nitride nanocrystals and moderate MoN band strength, the nanohybrids exhibited superior catalytic property, especially Mo2N/SBA-15/rGO with the highest NH3 decomposition rate of 30.58 mmol g−1cat min−1 among any Mo-based catalysts reported to date. Density functional theory (DFT) calculations revealed that the superior catalytic activity for Mo2N compared to MoN stemmed from a large reduction of kinetic energy barriers of dehydrogenation and nitrogen desorption. Moreover, the introduction of rGO can effectively weaken the associative desorption of adsorbed N atoms and thus improve NH3 decomposition activity. This study highlights the importance of designing spatially confined metal nitrides for enhancing energy catalysis.

Synthesis of Ni-MOF derived NiO/rGO composites as novel electrode materials for high performance supercapacitors

Ni-MOF derived NiO nanosheets growing on rGO have been successfully synthesized by a hydrothermal method following by a series of calcination procedures (300 °C, 400 °C, and 450 °C). The influence of the introduction of rGO and the calcination temperature on electrochemical performance of Ni-MOF derived NiO nanosheets as the electrode material were highlighted in detail. For the three-electrode test system, Ni-MOF derived NiO/rGO composites subjected to calcination at 300 °C demonstrated the highest specific capacitance (435.25 F·g−1 at 1 A·g−1), and maintained 68.00% of its initial value at 8 A·g−1. Its specific capacitance was increased by 49.34% when compared with the initial value after 25,000 cycles at 50 mV·s−1. With the increase in calcination temperature, the specific capacitance presented the downward tendency (400 °C: 171.50 F·g−1 at 1 A·g−1, 450 °C: 116.00 F·g−1 at 1 A·g−1) due to the reduction in specific surface area originating from the agglomeration of NiO nanosheets. The introduction of rGO greatly enhanced the electrochemical performance of the composites treated at 300 °C (increased by 40.40% at 1 A·g−1 and 47.30% in specific capacitance at 8 A·g−1). The assembled hybrid supercapacitors (HSC) with Ni-MOF derived NiO/rGO composites (300 °C) and active carbon as the cathode and anode also displayed the outstanding electrochemical performance. The value of energy density reached to 76.96 Wh·kg−1 at the power density of 400 W·kg−1. All these results confirm that the MOF-derived NiO/ rGO composite should be a potential electrode material for supercapacitors.

Designing effective and stable S‐scheme RGO/AgVO3/AgBr hybrid with enhanced photocatalytic performance

AbstractThe low separation of photogenerated electron‐hole pairs and cycle stability has been the main bottleneck which restricts the development of photocatalytic technology for water purification. Here, RGO/AgVO3 composites were fabricated by photo‐ultrasonic assisted reduction method, and AgBr nanoparticles were assembled on the surface of RGO/AgVO3 via an in situ ion exchange method. A series of characterization and experimental results indicated that the introduction of RGO influenced the growth of crystal phase for AgVO3 nanorods, resulting that AgVO3 nanorods became thicker and shorter with the increase in RGO content. Moreover, RGO could also work as a bridge to promote the migration of electrons, leading different improvement for photocatalytic activity. Furthermore, in situ growth of AgBr on the surface of AgVO3 nanorods could prevent its agglomeration and exfoliation, thus improving the photocatalytic activity and cycle stability of composites. RGO1%/AgVO3/AgBr30% exhibited excellent photocatalytic activity and stability for methylene blue (MB) degradation due to its unique structure, and its removal ratio reached at 96.2% within 50 min. Meanwhile, the separation of photogenerated electron‐hole pairs of AgVO3 was markedly improved due to the introduction of RGO and AgBr. Based on the trapping experiments and theoretical calculation of band gap, a possible S‐scheme photocatalytic mechanism for improved photocatalytic activity was proposed.

Preparation of recyclable BiOBr/graphene hydrogel composite and its photodegradation of sodium butyl xanthate

The BiOBr/graphene (BiOBr/RGO) hydrogel composites were prepared via hydrothermal method in this study. The composition and morphology of materials were characterized by XRD and SEM. Photocatalytic properties of the BiOBr/RGO hydrogel composites on sodium n-butyl xanthate were systematically investigated, respectively. The results show that three dimensional macroscopical BiOBr/RGO hydrogel composites are successfully prepared, which is beneficial to recycling. When initial concentration of 50 mL sodium n-butyl xanthate is 25 mg·L−1, degradation time is 85 min, and the dosage of photocatalyst is 10 mg. The degradation efficiency of the BiOBr/RGO hydrogel composite (mass fraction of BiOBr is 92wt%) for sodium n-butyl xanthate can reach 96.69%, and that of BiOBr is merely 44.84%. In all, the introduction of RGO can improve the photocatalytic performance of BiOBr, and macro material is favorable for recycling.

Boosting the capacitive performance of hierarchical cobalt molybdate hybrid electrodes for asymmetric supercapacitors

Ternary metal oxides have been demonstrated as promising potential materials for various applications such as supercapacitors. Yet, they are still struggling from inferior electrical conductivity, which comes from their natural properties and limited structure used. Herein, a facile hydrothermal route is developed to fabricate reduced graphene oxide (rGO) coating CoMoO4 on Ni foam substrates. More importantly, the CoMoO4/rGO electrode shows high electrochemical activity and yields a high areal capacitance of 4.55 F cm−2 at 4 mA cm−2 (or specific capacitance of 3033 F g−1), and the capacitance retention remains 92% after 10,000 charge/discharge cycles. The asymmetric supercapacitor is assembled using the prepared CoMoO4/rGO as the positive electrode and active carbon as the negative electrode, which exhibits a prominent energy density of 82.5 Wh kg−1 and power density of 3.7 kW kg−1. This work demonstrates that the hierarchically structured CoMoO4/rGO has enormous potential for electrochemical energy storage. This work reports the synthesis of CoMoO4/rGO cathode material and its application in asymmetric supercapacitors. The studies indicate that the introduction of rGO to form hierarchical nanostructures could boost capacitive performance.

Sandwich-like Ni-Zn hydroxide nanosheets vertically aligned on reduced graphene oxide via MOF templates towards boosting supercapacitive performance

• Hierarchical sandwich-like NiZn-OH/rGO is synthesized. • The NiZn-OH/rGO integrates the high capacity and excellent electronic conductivity. • The ingredient optimization and morphology regulation are studied. • This electrode exhibits superior supercapacitive performance. Constructing the supercapacitive materials which featured with abundant contact area and high conductivity is suitable for rapid ions/electrons transport. Herein, ultrathin Ni-Zn hydroxide nanosheets are vertically aligned on reduced graphene oxide (rGO) via MOF templates, and such sandwich-like structure is featured with abundant electrolytes-accessible contact sites. Introducing porous rGO substrate with excellent electronic conductivity can not only greatly accelerate the electron transfer between current collector and hydroxide, but also depress the agglomeration of hydroxide. Besides, heterogenous Zn element is also doped into the Ni-based hydroxide, which greatly optimizes the inherent electronic structure and conductivity of Ni-based hydroxide. Benefited from sandwich-like structure, the introduction of rGO and Zn doping, such Ni-Zn hydroxide/rGO material has harvested abundant contact sites and high conductivity. As a result, this supercapacitive material is featured with suitable capacitance (615.4C g −1 at 1 A g −1 ), appropriate stability (87.5% after 8000 cycles) and superior capacity rate property (62.3% retention at 30 A g −1 ). To well disclose the energy-storage feature of this material, a corresponding hybrid supercapacitor is manufactured, which presents a high capacity of 234.3C g −1 at 1 A g −1 , superior capacity retention (89.7% retention after 10,000 cycles) and excellent energy density (53.7 Wh kg −1 at 825.1 W kg −1 ). These fascinating results demonstrate the excellent supercapacitive performance of this Ni-Zn hydroxide/rGO material.