Chemical Reduction Of Graphene Oxide Research Articles

Binder-Free Three-Dimensional Porous Graphene Cathodes via Self-Assembly for High-Capacity Lithium-Oxygen Batteries.

The porous architectures of oxygen cathodes are highly desired for high-capacity lithium-oxygen batteries (LOBs) to support cathodic catalysts and provide accommodation for discharge products. However, controllable porosity is still a challenge for laminated cathodes with cathode materials and binders, since polymer binders usually shield the active sites of catalysts and block the pores of cathodes. In addition, polymer binders such as poly(vinylidene fluoride) (PVDF) are not stable under the nucleophilic attack of intermediate product superoxide radicals in the oxygen electrochemical environment. The parasitic reactions and blocking effect of binders deteriorate and then quickly shut down the operation of LOBs. Herein, the present work proposes a binder-free three-dimensional (3D) porous graphene (PG) cathode for LOBs, which is prepared by the self-assembly and the chemical reduction of GO with triblock copolymer soft templates (Pluronic F127). The interconnected mesoporous architecture of resultant 3D PG cathodes achieved an ultrahigh capacity of 10,300 mAh g-1 for LOBs. Further, the cathodic catalysts ruthenium (Ru) and manganese dioxide (MnO2) were, respectively, loaded onto the inner surface of PG cathodes to lower the polarization and enhance the cycling performance of LOBs. This work provides an effective way to fabricate free-standing 3D porous oxygen cathodes for high-performance LOBs.

Polydopamine Enhanced Interactions of Graphene Nanosheets to Fabricate Graphene/Polydopamine Aerogels with Effectively Clear Organic Pollutants.

Graphene/polydopamine aerogels (GPDXAG, where X represents the weight ratio of DA·HCl to GO) were prepared by the chemical reduction of graphene oxide (GO) using dopamine (DA) and l-ascorbic acid as reducing agents. During the gelation process, DA was polymerized to form polydopamine (PDA). The introduction of PDA in the gelation of aerogels led to a deeper reduction of GO and stronger interactions between graphene nanosheets forced by covalent cross-linking and noncovalent bonding including π-π stacking and hydrogen bonding. The weight ratio of DA·HCl to GO influencing the formation and morphology of GPDXAG was explored. With the increasing content of DA in gelation, the reduction of GO and the cross-linking degree of graphene nanosheets were enhanced, and the resulting GPDXAG had a more regular pore distribution. Additionally, introducing PDA into GPDXAG improved its hydrophobicity because of the adhesion of PDA to a network of aerogels. GPDXAG exhibited a higher removal efficiency for organic pollutants than the controlled graphene aerogels (GAG). Specifically, the adsorption capacity of GPDXAG for organic solvents was superior to that of GAG, and organic solvent was completely separated from the oil/water mixture by GPDXAG. The equilibrium adsorption capacity of GPDXAG for malachite green (MG) was measured to be 768.50 mg/g, which was higher than that for methyl orange (MO). In MG/MO mixed solutions, aerogels had obvious adsorption selectivity for the cationic dye. The adsorption mechanism of aerogels for MG was also discussed by simulating adsorption kinetic models and adsorption isothermal models.

Nanochannel Stability of Chemically Converted Graphene Oxide Membranes.

Chemically converted graphene oxide laminate membranes, which exhibit stable interlayered nanochannels in aqueous environments, are receiving increasing attention owing to their potential for selective water and ion permeation. However, how the molecular properties of conversion agents influence the stabilization of nanochannels and how effectively nanochannels are stabilized have rarely been studied. In this study, mono-, di-, and tri-saccharide molecules of glucose (Glu), maltose (Glu2), and maltotriose (Glu3) are utilized, respectively, to chemically modify graphene oxide (GO). The aim is to create nanochannels with different levels of stability and investigate how these functional conversion agents affect the separation performance. The effects of the property differences between different conversion agents on nanochannel stabilization are demonstrated. An agent with efficient chemical reduction of GO and limited intercalation in the resulting nanochannel ensures satisfactory nanochannel stability during desalination. The stabilized membrane nanochannel exhibits a permeance of 0.69 L m-2 h-1 bar-1 and excellent Na2SO4 rejection of 96.42%. Furthermore, this optimized membrane nanochannel demonstrates enhanced stability under varying external conditions compared to the original GO. This study provides useful information for the design of chemical conversion agents for GO nanochannel stabilization and the development of nanochannel membranes for precise separation.

Highly efficient enhancement of mechanical and tribological properties of Cu-based composites by addition of graphene-loaded Ni metal particles

The tight interface between graphene and Cu is the key to give full play to the comprehensive properties of Cu / C composites. In this study, graphene was used as a Cu-based reinforcing phase, and the interfacial bonding strength between graphene and Cu was enhanced by introducing Ni metal nanoparticles. Graphene supported Ni nanosheets (Ni-RGO) were successfully prepared by in-situ chemical reduction of graphene oxide (GO) and the introduction of Ni nanoparticles into GO. Ni nanoparticles were tightly attached to the graphene sheets. The mechanical properties and tribological properties of Ni-RGO/Cu composites were significantly improved. The bending strength of Ni-RGO/Cu composites reached 162.2 MPa, which was much higher than that of the pure Cu. At the same time, Ni-RGO composites have the lowest wear rate, and the friction coefficient is stable between 0.1 and 0.2. The comprehensive performance of Ni-RGO composites is significantly enhanced due to the unique structure of Ni-RGO, and the introduction of Ni nanoparticles realizes the effective bonding between GO-Ni-Cu. This study provides a new and effective strategy for enhancing the interfacial bonding of Cu/C composites.

Identification of Crystal Structure, Surface Area, and Magnetic Properties of Mn<sub>0.25</sub>Fe<sub>2.75</sub>O<sub>4</sub>/rGO Nanocomposites

The aim of this research is to identify the crystal structure, surface area, and magnetic properties of The Mn0.25Fe2.75O4-rGO (reduced Graphene Oxide) nanocomposites (NCs). The synthesis of Mn0.25Fe2.75O4-rGO nanocomposites used the co-precipitation method. The rGO was obtained from the chemical reduction of GO by hydrazine hydrate as the reduction agent. The ratio between Mn0.25Fe2.75O4 nanoparticles and rGO was 1:1 that ultrasonicated at 200 Hz for an hour. The IR spectra of NCs from the FTIR instrument showed that the absorption band around 580 cm-1 and 1622 cm-1 corresponds to the stretching mode of Fe-O and C=C respectively. According to X-Ray Diffraction (XRD) pattern analysis, peak of Mn0.25Fe2.75O4 was detected on 2θ at 30.1°, 35.5°, 53.5°, 57.1°, 62.7° and the peak of rGO phases was amorphous that detected on 2θ between 17º and 30º. The XRD pattern analysis and FTIR spectra have proved the completion of NC’s synthesis. The crystallite size was between 10.3 nm by Scherer's formula. The Specific Surface Area showed that the surface area of the nanocomposites was 100.61 m2/g and the Molecular cross-sectional area was 0.162 nm2 by BET Theory. The Magnetic properties show that the NCs were Superparamagnetic material that has a saturation magnetization of 9.34 emu/g. The material has many potentials to be explored by the researcher around the world.

Gold nanoparticles supported on alumina grafted N-doped RGO: A green catalyst for the catalytic degradation of organic dyes and deprotection of oximes

An environmentally benign synthetic protocol for the preparation of gold supported N-doped TRGO-modified γ-alumina has been reported. The research focused on the use of different strategies for reduction of GO using natural as well as chemical reducing agents. Fresh tulsi and neem leaf extract were used for bio-reduction of GO, while hydrazine hydrate and sodium borohydride were used for the chemical reduction of GO to obtain RGO. The preliminary analysis from FT-IR and BET surface area authenticated that tulsi leaf extract was the best reducing agent among others for the preparation of RGO. TRGO (tulsi leaf extract reduced graphene oxide) obtained from the reduction of GO via tulsi leaf extract was doped with nitrogen to get N-doped TRGO followed by grafting with γ-Al2O3 and immobilization of Au NPs to get the desired catalyst. The developed catalyst was later examined via different characterization techniques. Further, the synthesized catalyst shows great potential for application in degradation of various dyes and oxidative deprotection of oximes. Nitrogen doping as well as the higher specific surface area of the catalyst were two key parameters influencing the higher catalytic performance of Au@NTRGO-γ-Al2O3. The rational strategy exhibited in the present work provides new insights into the development of green, efficient and sustainable catalysts for different organic transformations.

Synthesis of Graphene Aerogel for Adsorptive Removal of Tetracycline from Water: Impact of Operating Parameters

Graphene aerogel (GA) was synthesized by chemical reduction of graphene oxide (GO) using ethylene diamine as a reducing agent, which was then followed by a freeze-drying process. The morphology and surface properties of GA, GO samples were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), and Brunauer-Emmett-Teller (BET). GA was then used to study the adsorption process of tetracycline (TC) in aqueous solutions. Different parameters influencing the adsorption efficiency of GA such as pH, adsorbent load, initial concentration of TC, contact time were investigated. The results showed that when GO was transformed to GA, the XRD characteristic peak at about 10.8˚ was shifted to broad peaks at 26˚ and 43˚, implying that the crystalline structure of GO was converted to GA which contained a large percent of amorphous structure and a smaller crystalline structure formed by stacking layers of graphene. The C/O ratio in GA sample was significantly increased compared to GO samples (6.5/1 compared to 1.38/1), suggesting that oxygen-containing functional groups (-OH, -C=O, -O-…) in GO were drastically reduced. The optimal conditions for the adsorption of TC were 10 mg L-1 TC solution, pH 7.0 at 75 min, 0.1 g L-1 of adsorbent, and at 30 °C. The adsorption process was better described by Langmuir isotherm model (R2=0.9938) compared to Freundlich one (R2=0.1302). The maximum adsorption capacity (Qmax) of GA calculated by the Langmuir model was 107.5 mg g-1, significantly higher than other common adsorbents. GA presented a stable and promising adsorbent for TC removal in water.

Efficient lubrication of alkylated reduced graphene oxide based on tribochemistry

Graphene has been applied to the research of new lubricant additives in the field of tribology because of its excellent properties. However, during the mixing process of graphene and base oil, agglomerated structures are formed due to their incompatibility, and this phenomenon limits the full play of its advantages. In the face of this challenge, this paper designs a simple and efficient octadecyltriethoxysilane modified reduced graphene oxide (rGOOES) nanolubricant through a three-step process, including the synthesis, functionalization, and chemical reduction of GO, to meet the future needs of oil-based interface lubrication. The morphological and structural characteristics of rGOOES nanosheets were studied by scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier infrared spectroscopy and thermal weight loss analyzer, and the dispersion stability and tribological properties of rGOOES nanofluids were investigated by particle size distribution method and four-sphere method, respectively. According to the findings, the outcomes demonstrated that the procedure had the ability to augment the stability of rGOOES nanosheets’ dispersion and ensured their uninterrupted delivery to the contact interfaces of the steel ball friction pairs. Macro tribological experiments confirmed that the blend with rGOOES (0.01 wt%) exhibited significant friction and wear reduction compared to the base oil, reducing the coefficient of friction by 22.1% and the wear scar diameter by 24.8% of the steel ball friction pairs. The mechanism analysis indicated that this improvement in lubrication properties was attributed to the high dispersion of rGOOES nanosheets and the reorganization of the sliding interfaces, as well as the protective film formed on the friction interfaces of the steel balls. Thus, this work provides a practical application of two-dimensional nanomaterials in the field of lubrication.

Apoptotic effect of reduced Graphene Oxide on MCF-7 Breast cancer cell line using Asparagus Racemosus roots

In the modern era, the major health issue is cancer. Cancer is one of the second- deadliest death-causing diseases worldwide. Graphene is a carbon-based material that has drawn a great deal of attention because of its eccentric chemical and physical properties. Moreover, graphene can be transformed into graphene oxide or reduced graphene oxide, depending on its application. Chemical reduction of graphene oxide was associated with toxic and harmful reducing compounds; hence, the green, efficient and cost-effective approach for graphene synthesis is using plant extract. In this contemporary study, the reduced graphene oxide can be synthesized from Asparagus racemosus root extract, involving anti-cancer activity. The reduced graphene oxide was characterized from UV-Visible, FT-IR, SEM and XRD. The size and shape of the synthesized reduced graphene oxide were confirmed from SEM studies. The anti-cancer activity showed a strong cytotoxic effect on the tested cell line.

Molecular-scale grinding of uniform small-size graphene flakes for use as lubricating oil additives

A variety of industrial preparation methods to obtain graphene from graphite have been developed, the most prominent of which are the chemical reduction of graphene oxide and intercalation-exfoliation methods. However, the low-cost, thin-layer, large-scale production of graphene with a radial dimension smaller than 1 μm (SG) remains a great challenge, which has limited the industrial development and application of small-scale graphene in areas such as textile fibers, engine oil additives, and graphene-polymer composites. We have developed a novel way to solve this problem by improved ball milling methods which form molecular-scale grinding aids between the graphite layers. This method can produce uniform, small-size (less than 1 μm) and thin-layer graphene nanosheets at a low cost, while ensuring minimal damage to the internal graphene structure. We also show that using this SG as an additive in lubricating oil not only solves the current dispersion stability of graphene, but also reduces the friction coefficient by more than 27% and wear by more than 38.8%. The SG preparation method reported is simple, low-cost, and has a significant effect in lubricating applications, which is of great commercial value.

Liquid crystalline reduced graphene oxide composite fibers as artificial muscles

Soft materials are known for their compliance, adaptivity and dexterity. They have been well-pursued to create artificial muscles for robotic applications, however, at the cost of load bearing, bit rates and energy efficiency compared with their rigid body counterparts. Despite significant efforts to improve their performance, very few can match the biological muscles, achieving fast speed, high elasticity, and high power density simultaneously. Here, we self-assemble composite fibers by wet-spinning graphene oxide (GO) nanosheets in their lyotropic liquid crystal (LLC) phase mixed with conducting polymers and depleting agent, poly(ethylene glycol), followed by chemical reduction of GO. The resulting reduced GO (rGO) nanosheets are highly aligned and closely packed, which is essential to their high mechanical strength and toughness and actuation behaviors. The composite fiber exhibits fast (80 ms) and reversible bending via electrostatic repulsion between the rGO sheets. When the fibers are plied with nylon yarns, our actuators can achieve 75 J/kg work capacity and 924 W/kg power density without diminishing the bending strain and efficiency up to 10,000 cycles.

Partially reduced graphene oxide produced by glucose in alkaline conditions using probe sonication: the role of the base in reduction

The use of mild reagents in the synthesis of reduced graphene oxide (RGO) is an advantageous method to produce materials partially reduced without the use of hazardous chemicals, such as the hydrazine route, which is a standard method to promote the chemical reduction of graphene oxide. This paper presents the sono-assisted route to produce partially RGO particles using glucose as a mild reducing agent in alkali media, mediated by sodium and potassium hydroxide. The results demonstrated the direct influence of base on the final properties of RGO, with differences in the thermal stability, bandgap, impedance, and C/O rate. With a possible anchoring of glucose-derivated molecules on sheet surface, this study indicates a way to control the particle surface properties according to the base chosen during the sono-assisted reduction method.

Mg-assisted reduced graphene oxide fabrication under microwave irradiation of a natural source of carbon

Chemical reduction of graphene oxide to form reduced graphene oxide (rGO) is a long process that needs time and energy. In this work, we present a facile one-step method to produce rGO using a domestic microwave oven for 2 min. The chemical composition is studied by X-Ray Photoelectron Spectroscopy (XPS), Raman and X-Ray diffraction (XRD) that confirm the formation of rGO. They reveal also the benifit effect of MgCl2 addition towards the rGO formation. Different amounts of MgCl2 are added to polyethylene glycol (PEG) and a natural source of carbon (glucose) is used to form rGO. The rGO yield is successfully enhanced by addition of MgCl2 low concentration. The oxygen concentration decreases with Mg addition which means that Mg atoms replaced oxygen or simply adsorbed at the edge sites. Moreover, carbon concentration increases with MgCl2 addition, which means that Mg acts as an activator of rGO formation. At high MgCl2 concentration, Mg(OH)2-rGO is formed and has a lot of applications.

Hydrothermally synthesized rGO-BiVO4 nanocomposites for photocatalytic degradation of RhB

BiVO4 nanoparticles (NPs) synthesized by hydrothermal approach were hybridized with reduced graphene oxide (rGO) in various weight ratios (1:1, 1:3 & 3:1) and their effect of the composition on improving the photocatalytic degradation performance of the RhB dye was evaluated. The size and morphological variation of BiVO4 due to the hybridization of rGO have been analyzed with scanning electron microscopy and X-Ray diffraction studies, which confirms the formation of the composition. The intimate contact between 2D graphene oxide and BiVO4 is expected to lend higher separation of charge carriers due to the built-in electric field at the interface. A reduction in the bandgap of BiVO4 from 2.4 to 2.1 eV was demonstrated by UV-DRS and can be associated with the correct addition of rGO in BiVO4 NPs. In addition, Raman spectroscopy confirms the chemical reduction of GO in the hybrid nanocomposites. The photocatalytic analysis shows that 3:1-rGO-BiVO4 (3:1-RGB) nanocomposites have an almost 3.6 times higher performance in the complete degradation of RhB dyes as compared to bare BiVO4 NPs.

A Continuous Gradient Chemical Reduction Strategy of Graphene Oxide for Highly Efficient Evaporation-Driven Electricity Generation.

Spontaneously harvesting electricity through a water evaporation process is renewable and environmentally friendly, and provides a promising way for self-powered electronics. However, most of evaporation-driven generators are suffering from a limited power supply for practical use. Herein, a high-performance textile-based evaporation-driven electricity generator based on continuous gradient chemical reduced graphene oxide (CG-rGO@TEEG) is obtained by a continuous gradient chemical reduction strategy. The continuous gradient structure not only greatly enhances the ion concentration difference between the positive and negative electrodes but also significantly optimizes the electrical conductivity of the generator. As a result, the as-prepared CG-rGO@TEEG can generate a voltage of 0.44V and a considerable current of 590.1µA with an optimized power density of 0.55mW cm-3 when 50µL of NaCl solution is applied. Such scale-up CG-rGO@TEEGs can supply sufficient power to directly drive a commercial clock for more than 2h in ambient conditions. This work offers a novel approach for efficient clean energy harvesting based on water evaporation.

Activated Carbon-Embedded Reduced Graphene Oxide Electrodes for Capacitive Desalination

Capacitive deionization of saline water is one of the most promising water purification technologies due to its high energy efficiency and cost-effectiveness. This study synthesizes porous carbon composites composed of reduced graphene oxide (rGO) and activated carbon (AC) with various rGO/AC ratios using a facile chemical method. Surface characterization of the rGO/AC composites shows a successful chemical reduction of GO to rGO and incorporation of AC into rGO. The optimized rGO/AC composite electrode exhibits a specific capacitance of ~243 F g<sup>−1</sup> in a 1 M NaCl solution. The galvanostatic charging-discharging test shows excellent reversible cycles, with a slight shortening in the cycle time from the ~260<sup>th</sup> to the 530<sup>th</sup> cycle. Various monovalent sodium salts (NaF, NaCl, NaBr, and NaI) and chloride salts (LiCl, NaCl, KCl, and CsCl) are deionized with the rGO/AC electrode pairs at a cell voltage of 1.3 V. Among them, NaI shows the highest specific adsorption capacity of ~22.2 mg g<sup>−1</sup>. Detailed surface characterization and electrochemical analyses are conducted.

Maintaining Colloidal Stability of Polymer/Reduced Graphene Oxide Nanocomposite Aqueous Dispersions Produced via In Situ Reduction of Graphene Oxide for the Preparation of Electrically Conductive Coatings

Chemical reduction of graphene oxide (GO) in an aqueous polymer/GO dispersion invariably causes restacking and precipitation of reduced GO (rGO) sheets leading to spontaneous phase separation. This has been a significant challenge limiting the commercial production of aqueous polymer/rGO paints and coatings. In this study, we developed in situ reduction strategies to chemically reduce GO while maintaining the colloidal stability of an aqueous polymer/rGO dispersion. An aqueous polymer/GO latex was prepared using miniemulsion polymerization, which was subsequently reduced in situ using four different chemical reducing agents (hydroiodic acid, sodium borohydride, ascorbic acid, and hydrazine hydrate) to obtain colloidally stable polymer/rGO dispersions. The reduction of GO was confirmed using X-ray photoelectron spectroscopy (XPS), Raman, and X-ray diffraction (XRD). The colloidal stability of the reduced dispersions was maintained for over 6 months under ambient storage conditions. Stable polymer/rGO dispersions were drop cast to form nanocomposite films at ambient temperature. Finally, the electrical conductivity measurement of polymer/rGO films revealed the highest conductivity for hydrazine hydrate-reduced films (∼6.6 S m–1), which was marginally higher than for hydroiodic acid-reduced films (∼3.4 S m–1). The electrical conductivity of sodium borohydride- and ascorbic acid-reduced films was two orders of magnitude lower than for hydrazine hydrate- and hydroiodic acid-reduced films. Overall, the present results pave a path for the commercial production of colloidally stable aqueous polymer/rGO composite paints and coatings.

The Effects of rGO Content and Drying Method on the Textural, Mechanical, and Thermal Properties of rGO/Polymer Composites

Composite hydrogels samples consisting of poly(methyl methacrylate/butyl acrylate/2-hydroxyethylmethacrylate) (poly-OH) and up to 60% reduced graphene oxide (rGO) containing rGO were synthesized. The method of coupled thermally induced self-assembly of graphene oxide (GO) platelets within a polymer matrix and in situ chemical reduction of GO was applied. The synthesized hydrogels were dried using the ambient pressure drying (APD) and freeze-drying (FD) methods. The effects of the weight fraction of rGO in the composites and the drying method on the textural, morphological, thermal, and rheological properties were examined for the dried samples. The obtained results indicate that APD leads to the formation of non-porous xerogels (X) of high bulk density (D), while FD results in the formation of highly porous aerogels (A) with low D. An increase in the weight fraction of rGO in the composite xerogels leads to an increase in D, specific surface area (SA), pore volume (Vp), average pore diameter (dp), and porosity (P). With an increase in the weight fraction of rGO in A-composites, the D values increase while the values of SP, Vp, dp, and P decrease. Thermo-degradation (TD) of both X and A composites takes place through three distinct steps: dehydration, decomposition of residual oxygen functional group, and polymer chain degradation. The thermal stabilities (TS) of the X-composites and X-rGO are higher than those of the A-composites and A-rGO. The values of the storage modulus (E') and the loss modulus (E") of the A-composites increase with the increase in their weight fraction of rGO.

Facile Synthesis of Hollow Fe3O4-rGO Nanocomposites for the Electrochemical Detection of Acetaminophen

Acetaminophen (AC) is one of the most popular pharmacologically active substances used as an analgesic and antipyretic drug. Herein, a new type of hollow Fe3O4-rGO/GCE electrode was prepared for electrochemical detection of AC through a three-step approach involving a solvothermal method for the synthesis of hollow Fe3O4 and the chemical reduction of graphene oxide (GO) for reduced graphene oxide (rGO) and Fe3O4-rGO nanocomposites modified on the glassy carbon electrode (GCE) surface. The as-prepared Fe3O4-rGO nanocomposites were characterized using a transmission electron microscope (TEM), X-ray diffraction (XRD), and a magnetic measurement system (SQUID-VSM). The magnetic Fe3O4-rGO/GCE electrodes were employed for the electrochemical detection of AC using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and square wave voltammetry (SWV) and exhibited an ultra-high selectivity and accuracy, a low detection limit of 0.11 µmol/L with a wider linear range from 5 × 10-7 to 10-4 mol/L, and high recovery between 100.52% and 101.43%. The obtained Fe3O4-rGO-modified GCE displays great practical significance for the detection of AC in drug analysis.

A comparative investigation of the chemical reduction of graphene oxide for electrical engineering applications.

The presence of oxygen-containing functional groups on the basal plane and at the edges endows graphene oxide (GO) with an insulating nature, which makes it rather unsuitable for electronic applications. Fortunately, the reduction process makes it possible to restore the sp2 conjugation. Among various protocols, chemical reduction is appealing because of its compatibility with large-scale production. Nevertheless, despite the vast number of reported chemical protocols, their comparative assessment has not yet been the subject of an in-depth investigation, rendering the establishment of a structure-performance relationship impossible. We report a systematic study on the chemical reduction of GO by exploring different reducing agents (hydrazine hydrate, sodium borohydride, ascorbic acid (AA), and sodium dithionite) and reaction times (2 or 12 hours) in order to boost the performance of chemically reduced GO (CrGO) in electronics and in electrochemical applications. In this work, we provide evidence that the optimal reduction conditions should vary depending on the chosen application, whether it is for electrical or electrochemical purposes. CrGO exhibiting a good electrical conductivity (>1800 S m-1) can be obtained by using AA (12 hours of reaction), Na2S2O4 and N2H4 (independent of the reaction time). Conversely, CrGO displaying a superior electrochemical performance (specific capacitance of 211 F g-1, and capacitance retention >99.5% after 2000 cycles) can be obtained by using NaBH4 (12 hours of reaction). Finally, the compatibility of the different CrGOs with wearable and flexible electronics is also demonstrated using skin irritation tests. The strategy described represents a significant advancement towards the development of environmentally friendly CrGOs with ad hoc properties for advanced applications in electronics and energy storage.