scholarly journals SYNTHESIS AND CHARACTERIZATION: COMPOSITE OF GRAPHENE OXIDE BASED PALM KERNEL SHELL WASTE WITH FE3O4

2021 ◽  
Vol 22 (2) ◽  
pp. 101
Author(s):  
Bernadeta Ayu Widyaningrum ◽  
Dita Apriani ◽  
Putri Amanda ◽  
Ismadi Ismadi ◽  
Sutanto Sutanto
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Palm Kernel ◽  
Energy Dispersive Spectrum ◽  
Energy Dispersive ◽  
Synthesis And Characterization ◽  
Palm Kernel Shell ◽  
Shell Waste ◽  
Ft Ir ◽  
Co Precipitation

SYNTHESIS AND CHARACTERIZATION: COMPOSITE OF GRAPHENE OXIDE BASED PALM KERNEL SHELL WASTE WITH Fe3O4. In this study, GO-Fe3O4 were fabricated by co-precipitation technique and the graphene oxide (GO) were synthesized from an agricultural biomass, palm kernel shell, via Hummer’s method. Field Emission Scanning Electron Microscopy and Energy Dispersive Spectrum (FESEM-EDS), Fourier Transform Infra-Red (FT-IR) spectroscopy, X-Ray Diffractometer (XRD), and Raman spectroscopy were used to analysis the successful attachment of Fe3O4 onto the surface of GO. Morphology observation showed that Fe3O4 were heterogeneously deposited on the surface of GO. FT-IR spectra shows peak that incorporated to oxygenated functional groups and sharp peak at 586 cm-1 confirmed to lattice absorption of Fe3O4. The percentage of composition of GO-Fe3O4 was characterized by energy dispersive spectroscopy and the results also confirmed in XRD exhibits similar properties with JCPDS 19-0629 for magnetite more dominant than GO. From Raman spectroscopy analysis shows that 1343.82 cm-1 (D-band) and 1584.62 cm-1 (G-band) and 2698 cm-1 (2D-band) indicates GO and GO-Fe3O4 were successfully synthesized.

scholarly journals Processing and Characterization of Activated Carbon from Coconut Shell and Palm Kernel Shell Waste by H3PO4 Activation

2021 ◽  
Vol 61 (2) ◽  
pp. 91-104
Author(s):  
A. Nyamful ◽  
E. K. Nyogbe ◽  
L. Mohammed ◽  
M. N. Zainudeen ◽  
S. A. Darkwa ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Scale Up ◽  
Palm Kernel ◽  
Coconut Shell ◽  
Palm Kernel Shell ◽  
Time Scanning ◽  
Shell Waste ◽  
H3po4 Activation ◽  
Characterization Of Activated Carbon

Palm kernel shell and coconut shell are used as a precursor for the production of activated carbon, a way of mitigating the tons of waste produced in Ghana. The raw Palm kernel shell and coconut shell were activated chemically using H3PO4. A maximum activated carbon yield of 26.3 g was obtained for Palm kernel shell and 22.9 g for coconut shell at 400oC, an impregnation ratio of 1.2 and 1-hour carbonization time. Scanning electron microscopy reveals well-developed cavities of the H3PO4 activated coconut shell and Palm kernel shell compared to the non-activated carbon. Iodine number of 743.02 mg/g and 682.11 mg/g, a porosity of 0.31 and 0.49 and the electrical conductivity of 2010 μS/cm and 778 μS /cm were obtained for the AC prepared from the coconut shell and Palm kernel shell respectively. The results of this work show that high-quality activated carbon can be manufactured locally from coconut shell and Palm kernel shell waste, and a scale-up of this production will go a long way to reduce the tons of coconut shell and Palm kernel shell waste generated in the country.

scholarly journals Development of New Carbon-Based Electrode Material from Oil Palm Waste-Derived Reduced Graphene Oxide and Its Capacitive Performance Evaluation

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Salisu Nasir ◽  
Mohd Zobir Hussein ◽  
Zulkarnain Zainal ◽  
Nor Azah Yusof
Keyword(s):  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
Oil Palm ◽  
Palm Kernel ◽  
Graphene Oxides ◽  
Palm Kernel Shell ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Carbon Based

This paper is an expansion of our previous work on the synthesis of graphene oxides and reduced graphene oxides from different kinds of oil palm waste-based feedstocks, namely, OPL (oil palm leaf), PKS (palm kernel shell), and EFB (empty fruit bunch). Here, the electrochemical measurements of the resulting reduced graphene oxides derived via mild-temperature annealing reduction of the graphene oxides were accomplished using cyclic voltammetry and galvanostatic charge/discharge processes. The findings put forward their promising features for supercapacitor applications. For instance, the reduced graphene oxide derived using EFB precursor (rGOEFB) which has a BET surface area of 117 m2 g-1 exhibits a specific capacitance of 688 F g−1 at an applied current density of 0.8 A g-1. This is higher than that observed for reduced graphene oxides derived from oil palm leaf (rGOOPL), palm kernel shell (rGOPKS), and the commercially acquired graphite (rGOCG), which possessed specific capacitance values of 632, 424, and 220 F g−1, respectively. It can be deduced that the specific capacitance of the reduced graphene oxide samples increases in the following order: (rGOCG) < (rGOPKS) < (rGOOPL) < (rGOEFB). In summary, these new classes of carbon-based nanomaterials could be applied as efficient electrode materials for supercapacitor application with potential good performance. With this novel green and sustainable approach, various carbon-based nanomaterials can be fabricated for a broad range of multifunctional applications.

Synthesis and Characterization of Structure of Fe3O4@Graphene Oxide Nanocomposites

2016 ◽  
Vol 25 (6) ◽  
pp. 096369351602500 ◽  
Author(s):  
Ruimin Fu ◽  
Mingfu Zhu
Keyword(s):  
Graphene Oxide ◽  
Drug Carrier ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Co Precipitation ◽  
Ft Ir Spectroscopy

Nowadays, the hummers method for preparation of graphene oxide (GO) was improved. The grapheme oxide @ Fe3O4 magnetic nanocomposites were synthesized by co-precipitation method. After analysing the morphology and structure of obtained nanocomposites by X-ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared (FT-IR) spectroscopy, the result was shown as follows. The particle size of Fe3O4 in nanocomposites is 30 nm. Many functional groups are found in grapheme oxide, and such groups could be used to bind with the drug. In the test for magnetic properties, the nanocomposites gathered rapidly in the vicinity of the permanent magnet. The nanocomposites, with high superparamagnetism, can be used in the following applications: drug targeting transports, drug carrier, and diagnosis assistant system.

scholarly journals Gamma-Irradiation Induced Functionalization of Graphene Oxide with Organosilanes

2019 ◽  
Vol 20 (8) ◽  
pp. 1910 ◽  
Author(s):  
Kabiru Musa Aujara ◽  
Buong Woei Chieng ◽  
Nor Azowa Ibrahim ◽  
Norhazlin Zainuddin ◽  
Chantara Thevy Ratnam
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Thermogravimetric Analysis ◽  
Gamma Ray ◽  
Chemical Interaction ◽  
Chemical Reduction ◽  
Contact Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

Gamma-ray radiation was used as a clean and easy method for turning the physicochemical properties of graphene oxide (GO) in this study. Silane functionalized-GO were synthesized by chemically grafting 3-aminopropyltriethoxysilane (APTES) and 3-glycidyloxypropyltrimethoxysilane (GPTES) onto GO surface using gamma-ray irradiation. This established non-contact process is used to create a reductive medium which is deemed simpler, purer and less harmful compared conventional chemical reduction. The resulting functionalized-GO were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), and Raman spectroscopy. The chemical interaction of silane with the GO surface was confirmed by FT-IR. X-ray diffraction reveals the change in the crystalline phases was due to surface functionalization. Surface defects of the GO due to the introduction of silane mioties was revealed by Raman spectroscopy. Thermogravimetric analysis of the functionalized-GO exhibits a multiple peaks in the temperature range of 200–650 °C which corresponds to the degradation of chemically grafted silane on the GO surface.

Efek Kosentrasi Asam Fosfat (H3PO4) pada Sifat Listrik Reduced Gra-phene Oxide (rGO)

2019 ◽  
Vol 24 (2) ◽  
pp. 50-53
Author(s):  
Miftahul Husnah ◽  
◽  
Akfiny Aimon ◽  
Ferry Iskandar ◽  
◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Infrared Spectroscopy ◽  
Reduced Graphene Oxide ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
X Ray ◽  
Reduced Graphene ◽  
Ft Ir

Pada penelitian ini telah dilakukan sintesis rGO dengan variasi penambahan asam fosfat yang mempengaruhi sifat listrik dari sampel yang diperoleh. Karakterisasi yang digunakan pada penelitian ini yaitu Fourier Tansform Infrared Spectroscopy (FT-IR), X-Ray Difrractometer (XRD), Energy Dispersive Spectrometer (EDS), dan 4 point probe. Dari hasil XRD dan FT-IR menun-jukkan rGO yang disintesis tanpa penambahan asam fosfat (rGO1) ataupun dengan penambahan asam fosfat (H3PO4) (rGO2) telah berhasil disintesis. Berdasarkan karakterisasi EDS diperoleh jenis atom pada permukaan sampel pada rGO1 terdiri dari 7,27% atom O sedangkan pada sampel rGO2 terdiri dari 6,36% atom O serta sisanya merupakan atom C. Pengukuran 4 Point Probe menunjukkan rGO1 memiliki konduktivitas listrik ~6 kali lebih baik dibandingkan konduktivitas listrik pada rGO2. Hasil ini menunjukkan penambahan asam fosfat membantu memperbaiki sifat listrik dari reduced graphene oxide (rGO).

Synthesis and characterization of a macrocyclic copper complex containing the 14-membered 1,3,5,8,10,12-hexaazacyclotetradecane unit

2017 ◽  
Vol 72 (2) ◽  
pp. 115-118 ◽  
Author(s):  
Mohammad Hakimi ◽  
Zahra Mardani ◽  
Keyvan Moeini ◽  
Fabian Mohr
Keyword(s):  
Raman Spectroscopy ◽  
Elemental Analysis ◽  
Copper Complex ◽  
Copper Atom ◽  
Octahedral Geometry ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractIn this work, a new macrocyclic copper complex, [Cu(ACE)(SCN)2]; ACE: 1,3,6,10,12,15-hexaazatricyclo[13.3.1.16,10]eicosane, was prepared and characterized by elemental analysis, FT-IR, Raman spectroscopy and single-crystal X-ray diffraction. X-ray analysis of [Cu(ACE)(SCN)2] reveals an elongated octahedral geometry around the copper atom in a centrosymmetric CuN6 environment.

scholarly journals Nanostructured spinel manganese cobalt ferrite for high-performance supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 51888-51895 ◽  
Author(s):  
Ayman E. Elkholy ◽  
F. El-Taib Heakal ◽  
Nageh K. Allam
Keyword(s):  
Energy Dispersive Spectroscopy ◽  
High Performance ◽  
Cobalt Ferrite ◽  
Energy Dispersive ◽  
Precipitation Method ◽  
One Pot ◽  
Ft Ir ◽  
Co Precipitation ◽  
Adsorption Desorption

We report on the synthesis of manganese cobalt ferrite (MnCoFeO4) nanoparticles via a simple one-pot co-precipitation method and their characterization through energy-dispersive spectroscopy (EDS), XRD, HR-TEM, FT-IR and N2 adsorption/desorption techniques.

Facile synthesis and characterization of graphene oxide/prussian blue/amino-terminated perylene derivative nanomaterials

2020 ◽  
Vol 10 (6) ◽  
pp. 922-927
Author(s):  
Deng Pan ◽  
Chang Liu ◽  
Lei Dai ◽  
Han Shen
Keyword(s):  
Raman Spectroscopy ◽  
Composite Material ◽  
Graphene Oxide ◽  
Prussian Blue ◽  
Synthesis And Characterization ◽  
Facile Synthesis ◽  
Electrochemical Technology ◽  
And Function ◽  
Scanning Electron

We report a facile and effective way to prepare graphene oxide/prussian blue/amino-terminated perylene derivative nanomaterials (GO/PB/PTCNH2). The morphology, size and function of prepared carbon-based composite material were characterized by using field emission scanning electron microscope (FE-SEM), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, UV-vis spectrophotometer and electrochemical technology. As a result, PB nanoparticles and PTCNH2 were uniformly dispersed on a typical origami GO sheet, and GO/PB/PTCNH2 nanocomposite had good stability and electrochemical properties.

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