Graphene oxide based dopamine mussel-like cross-linked polyethylene imine nanocomposite coating with enhanced hexavalent uranium adsorption

Molybdenum disulfide (MoS2) has been universally demonstrated to be an effective electrocatalytic catalyst for hydrogen evolution reaction (HER). However, the low conductivity, few active sites and poor stability of MoS2-based electrocatalysts hinder its hydrogen evolution performance in a wide pH range. The introduction of other metal phases and carbon materials can create rich interfaces and defects to enhance the activity and stability of the catalyst. Herein, a new defect-rich heterogeneous ternary nanocomposite consisted of MoS2, NiS and reduced graphene oxide (rGO) are synthesized using ultrathin αNi(OH)2 nanowires as the nickel source. The MoS2/rGO/NiS-5 of optimal formulation in 0.5 M H2SO4, 1.0 M KOH and 1.0 M PBS only requires 152, 169 and 209 mV of overpotential to achieve a current density of 10 mA cm−2 (denoted as η10), respectively. The excellent HER performance of the MoS2/rGO/NiS-5 electrocatalyst can be ascribed to the synergistic effect of abundant heterogeneous interfaces in MoS2/rGO/NiS, expanded interlayer spacings, and the addition of high conductivity graphene oxide. The method reported here can provide a new idea for catalyst with Ni-Mo heterojunction, pH-universal and inexpensive hydrogen evolution reaction electrocatalyst.

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Sulfur–hydrazine hydrate-based chemical synthesis of sulfur@graphene composite for lithium–sulfur batteries

Inorganic Chemistry Frontiers ◽

10.1039/c7qi00726d ◽

2018 ◽

Vol 5 (4) ◽

pp. 785-792 ◽

Cited By ~ 5

Author(s):

Jianmei Han ◽

Baojuan Xi ◽

Zhenyu Feng ◽

Xiaojian Ma ◽

Junhao Zhang ◽

...

Keyword(s):

Graphene Oxide ◽

Chemical Synthesis ◽

Hydrazine Hydrate ◽

Rate Capability ◽

Graphene Composite ◽

Reduced Graphene ◽

Lithium Sulfur Batteries ◽

Good Rate Capability ◽

Lithium Sulfur ◽

Excellent Stability

A sulfur–hydrazine hydrate chemistry-based method is reported here to integrate the sulfur and N-doped reduced graphene oxide to obtain S@N-rGO composite with 76% sulfur. The as-obtained S@N-rGO composite displays a good rate capability and excellent stability.

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3D Porous Nb2C MXene/Reduced Graphene Oxide Aerogel Coupled with NiFe Alloy Nanoparticles for Wearable Zn–Air Batteries

Materials Chemistry Frontiers ◽

10.1039/d1qm00885d ◽

2021 ◽

Author(s):

Hang Lei ◽

Shangjing Yang ◽

Runquan Lei ◽

Qing Zhong ◽

Qixiang Wan ◽

...

Keyword(s):

Graphene Oxide ◽

Catalytic Activity ◽

Reduced Graphene Oxide ◽

Active Sites ◽

Alloy Nanoparticles ◽

Reduced Graphene ◽

Reduced Graphene Oxide Aerogel ◽

Graphene Oxide Aerogel ◽

Catalytic Processes

Insufficient catalytic activity and self-restacking of 2D MXenes during catalytic processes would lead to limited number of active sites, sluggish ionic kinetics and poor durability, extremely restricting its application in...

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Enhanced photocatalytic reduction activity of uranium(vi) from aqueous solution using the Fe2O3–graphene oxide nanocomposite

Dalton Transactions ◽

10.1039/c7dt02639k ◽

2017 ◽

Vol 46 (43) ◽

pp. 14762-14770 ◽

Cited By ~ 16

Author(s):

Yadan Guo ◽

Yiqin Guo ◽

Xuegang Wang ◽

Peng Li ◽

Liuwei Kong ◽

...

Keyword(s):

Aqueous Solution ◽

Graphene Oxide ◽

Nuclear Industry ◽

Photocatalytic Reduction ◽

Potential Solution ◽

Hexavalent Uranium ◽

Reduction Activity ◽

Radioactive Wastewater

Photocatalytic technologies are a potential solution for remediation of radioactive wastewater, including the reduction of radioactive hexavalent uranium, which is commonly found in wastewater from the nuclear industry.

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Conductive methyl blue-functionalized reduced graphene oxide with excellent stability and solubility in water

Materials Research Bulletin ◽

10.1016/j.materresbull.2011.08.039 ◽

2011 ◽

Vol 46 (12) ◽

pp. 2353-2358 ◽

Cited By ~ 23

Author(s):

Xiang Cai ◽

Shaozao Tan ◽

Agui Xie ◽

Minsong Lin ◽

Yingliang Liu ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Methyl Blue ◽

Solubility In Water ◽

Reduced Graphene ◽

Excellent Stability

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Investigation of reinforced performance of modified graphene oxide/high solid content polysiloxane nanocomposite coating films

Journal of Materials Science ◽

10.1007/s10853-018-3077-7 ◽

2018 ◽

Vol 54 (4) ◽

pp. 3052-3068 ◽

Cited By ~ 2

Author(s):

Xinhai Zhang ◽

Xiaohong Ying ◽

Mengmeng Zhang ◽

Xufeng Yu ◽

Gang Sun ◽

...

Keyword(s):

Graphene Oxide ◽

Nanocomposite Coating ◽

Solid Content ◽

High Solid Content ◽

Coating Films ◽

High Solid ◽

Modified Graphene Oxide ◽

Modified Graphene

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Brilliant Blue-Functionalized Reduced Graphene Oxide with Excellent Stability and Solubility in Water

Advanced Materials Research ◽

10.4028/scientific5/amr.455-456.696 ◽

2012 ◽

Vol 455-456 ◽

pp. 696-700

Author(s):

Ai Li Yu ◽

Min Song Lin ◽

Agui Xie ◽

Xiang Cai ◽

Shao Zao Tan ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Brilliant Blue ◽

Solubility In Water ◽

Reduced Graphene ◽

Excellent Stability

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Breakthroughs in the Design of Novel Carbon-Based Metal Oxides Nanocomposites for VOCs Gas Sensing

Nanomaterials ◽

10.3390/nano10081485 ◽

2020 ◽

Vol 10 (8) ◽

pp. 1485 ◽

Cited By ~ 1

Author(s):

Eleonora Pargoletti ◽

Giuseppe Cappelletti

Keyword(s):

Graphene Oxide ◽

Active Sites ◽

Gas Sensing ◽

Spillover Effect ◽

Gas Diffusion ◽

Hybrid Features ◽

Multi Wall Carbon Nanotubes ◽

Recovery Times ◽

Electron Migration ◽

Carbon Based

Nowadays, the detection of volatile organic compounds (VOCs) at trace levels (down to ppb) is feasible by exploiting ultra-sensitive and highly selective chemoresistors, especially in the field of medical diagnosis. By coupling metal oxide semiconductors (MOS e.g., SnO2, ZnO, WO3, CuO, TiO2 and Fe2O3) with innovative carbon-based materials (graphene, graphene oxide, reduced graphene oxide, single-wall and multi-wall carbon nanotubes), outstanding performances in terms of sensitivity, selectivity, limits of detection, response and recovery times towards specific gaseous targets (such as ethanol, acetone, formaldehyde and aromatic compounds) can be easily achieved. Notably, carbonaceous species, highly interconnected to MOS nanoparticles, enhance the sensor responses by (i) increasing the surface area and the pore content, (ii) favoring the electron migration, the transfer efficiency (spillover effect) and gas diffusion rate, (iii) promoting the active sites concomitantly limiting the nanopowders agglomeration; and (iv) forming nano-heterojunctions. Herein, the aim of the present review is to highlight the above-mentioned hybrid features in order to engineer novel flexible, miniaturized and low working temperature sensors, able to detect specific VOC biomarkers of a human’s disease.

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Facile Synthesis of Ni–Mn Layered Double Hydroxide Nanopetals on 3D Reduced Graphene Oxide/Ni Foam for High-Performance Supercapacitors

NANO ◽

10.1142/s1793292020500216 ◽

2020 ◽

Vol 15 (02) ◽

pp. 2050021

Author(s):

Qi Tang ◽

Menghan Ye ◽

Li Ma ◽

Tao Zhou ◽

Mengyu Gan ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Layered Double Hydroxide ◽

Electrode Material ◽

Active Sites ◽

Retention Rate ◽

Ni Foam ◽

Reduced Graphene ◽

Capacitance Performance ◽

Double Hydroxide

In this work, the Ni–Mn layered double hydroxide (Ni–Mn LDH) nanopetals are fabricated on three-dimensional reduced graphene oxide/Ni foam (RGO/NF) by one-step hydrothermal method, in which the suspension of graphene oxide (GO) is directly reduced by nickel foam (NF) to obtain NF/RGO. The composite, which consists of interconnected Ni–Mn LDH nanopetals, forms a macroporous structure. Such an open space can promote electrolyte dispersion and ion diffusion of active substances, thus enhancing capacitance performance. Remarkable, during crystal growth, RGO can not only provide active sites for Ni–Mn LDH nanopetals, but also effectively connect Ni–Mn LDH nanopetals to NF, further promoting the electrochemical behavior of composite material. Moreover, RGO possess reasonable chemical stability which can improve the mechanical properties of the composite to obtain good stability. The experimental results show that the NF/RGO electrode material with Ni–Mn LDH nanopetals has excellent specific capacitance of 2250[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], good rate performance (the capacitance retention rate is still 64.0% at 10[Formula: see text]A[Formula: see text]g[Formula: see text] and excellent cycle life (45.1% at 10[Formula: see text]A[Formula: see text]g[Formula: see text] after 5000 cycles). NR/NM–LDH is used as the positive electrode and activated carbon is used as the negative electrode to assemble the asymmetric supercapacitor, the proper power density and energy density indicates that the NR/NM–LDH composite has great potential as an electrode material for supercapacitors.

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