Facile design of reduced graphene oxide decorated with Cu2O nanocube composite as antibiofilm active material

Danthron (DT) with multi-electron redox centers as a novel organic electrochemically active material for supercapacitors has been decorated on reduced graphene oxide nanosheets (RGNs) via a facile one-step reflux method.

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Graphene-titanate photocatalyst and its use in an air purifying device - prototype demonstration in operational environment

OAJ Materials and Devices ◽

10.23647/ca.md20211203 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

T. Baran ◽

S. Wojtyla

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Air Pollutants ◽

Active Material ◽

Operational Environment ◽

Reduced Graphene ◽

Excellent Photocatalytic Activity ◽

Volatile Organic ◽

Scale Experiment ◽

Degradation Of Pollutants

Volatile organic compounds constitute a group of dangerous air pollutants, which can be eliminated by the photocatalytic route. In this work we demonstrated the hydrothermal synthesis of photocatalytic composite CTO-RGO based on copper titanate and reduced graphene oxide. The material is composed of three phases namely rutile, tenorite and reduced graphene oxide, and it shows absorption in a broad range of light (ultraviolet and visible light). CTO-RGO showed an excellent photocatalytic activity in a laboratory scale experiment. Therefore it has been used as an active material in air purifying devices. A prototype was tested in operational environments such as apartment, fitness center and industrial places. Obtained results confirmed the significant decrease of VOC level due to photocatalytic degradation of pollutants.

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Silicon Carbon Nanoparticles Coated with Reduced Graphene Oxide with High Specific Capacity and High-Rate Performance as Anode Material for Lithium-Ion Battery

NANO ◽

10.1142/s1793292020501490 ◽

2020 ◽

Vol 15 (11) ◽

pp. 2050149

Author(s):

Xiangyu Shi ◽

Jifei Liu ◽

Jianfeng Dai ◽

Yufeng Qi

Keyword(s):

Graphene Oxide ◽

Electrochemical Performance ◽

Reduced Graphene Oxide ◽

Carbon Nanoparticles ◽

Active Material ◽

Specific Capacity ◽

Lithium Ion ◽

High Rate ◽

Silicon Carbon ◽

Reduced Graphene

Silicon carbon nanoparticles (SCNPs) coated with reduced graphene oxide (rGO) were fabricated by a hydrothermal method and subsequently by a simple heat treatment process. SCNPs/rGO exhibit excellent electrochemical performance which not only attributes the rGO layer to inhibit the volumetric expansion of silicon and reduce the impedance between the active material and lithium ions during the electrochemical process, but also improves the electrical conductivity of SCNPs/rGO. The as-prepared compound was cyclically tested at a current density of 150[Formula: see text]mA/g, with the first charge and discharge capacities of 3152.2[Formula: see text]mAh/g and 3342.7[Formula: see text]mAh/g, respectively. Moreover, the electrochemical performance of SCNPs/rGO was better than SCNPs. The [Formula: see text] values for fresh battery, after 1 cycle and 100 cycles, are 120.9[Formula: see text][Formula: see text], 120.5[Formula: see text][Formula: see text] and 104[Formula: see text][Formula: see text]. Thus, compared with SCNPs, SCNPs/rGO exhibited lower overall impedance values. These results indicate that the addition of graphene layer significantly improved the electrochemical performance of SCNPs electrodes and reduced the internal resistance of the battery.

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Reduced graphene oxide doping with nanometer-sized ferrocene moieties – New active material for glucose redox sensors

Biosensors and Bioelectronics ◽

10.1016/j.bios.2018.12.037 ◽

2019 ◽

Vol 128 ◽

pp. 23-31 ◽

Cited By ~ 11

Author(s):

Edyta Matysiak-Brynda ◽

Jakub P. Sęk ◽

Artur Kasprzak ◽

Agata Królikowska ◽

Mikolaj Donten ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Active Material ◽

Reduced Graphene ◽

Redox Sensors

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Tiny Basic Nickel Carbonate Arrays/Reduced Graphene Oxide Composite for High-Efficiency Supercapacitor Application

NANO ◽

10.1142/s1793292019500449 ◽

2019 ◽

Vol 14 (04) ◽

pp. 1950044 ◽

Cited By ~ 1

Author(s):

Zhengmin Yu ◽

Xiaoli Su ◽

Denghu Wei ◽

Shu-Juan Yao ◽

Huiyan Ma ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

High Efficiency ◽

Active Material ◽

3D Structure ◽

Graphene Oxide Nanosheets ◽

Supercapacitor Application ◽

Nickel Carbonate ◽

Reduced Graphene ◽

Excellent Stability

3D structure composite made of tiny basic nickel carbonate arrays on the surface of reduced graphene oxide nanosheets (G-NiCH) are prepared by the hydrothermal method. The specific surface area of the G-NiCH composites is twice that of single basic nickel carbonate, which is due to the tiny basic nickel carbonate arrays structure wherein each individual nanoneedle is about 20[Formula: see text]nm in length and 2[Formula: see text]nm in width. The G-NiCH electrodes display high-efficiency electrochemical performance with good specific capacitance (1230[Formula: see text]F[Formula: see text]g[Formula: see text]) and excellent stability (100% capacitance retention after 2000 cycles). This is attributed to the synergistic effect that reduced graphene oxide offer fast electron transmission path and basic nickel carbonate act as high effective active material.

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