scholarly journals Gamma Irradiation-Assisted Synthesis of Silver Nanoparticle-Embedded Graphene Oxide-TiO2 Nanotube Nanocomposite for Organic Dye Photodegradation

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Duy Khang Nguyen Vu ◽  
Dang Khoa Vo Nguyen
Keyword(s):  
Graphene Oxide ◽  
Gamma Irradiation ◽  
Silver Nanoparticle ◽  
Gamma Ray ◽  
Tio2 Nanotube ◽  
Oh Radicals ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Gamma Ray Irradiation ◽  
One Step

In this work, silver nanoparticle- (AgNP-) embedded graphene oxide- (GO-) TiO2 nanotube (TNT) nanocomposite (labelled GAT) was successfully synthesized by gamma ray radiolysis. The influence of irradiation process, including one-step and two-step assistances and at different irradiation doses (5, 10, 15, 20, and 25 kGy), on the GAT’s physicochemical properties was achieved. Structure and properties of irradiated materials were analyzed by Fourier-transformed infrared (FT-IR), ultraviolet-visible absorption (UV-Vis), and Raman spectroscopies; X-ray diffraction (XRD); and scanning electron (SEM) and transmission electron (TEM) microscopies. In addition, selective scavengers of e-aq and ⋅OH radicals were used to investigate the radiolytic synthesis of GAT nanocomposite. It was revealed that gamma ray irradiation could strongly support the relation of the composite synthesis. Furthermore, the synthesized GAT nanocomposites showed a significant effect for Rhodamine B (RhB) photodecomposition after 60 minutes of natural sunlight exposure and evaluation by UV-Vis absorption spectroscopy. Briefly, the obtained results highlighted the potential of gamma irradiation as a “clean” and controllable way for synthesizing beneficial nanocomposite materials for wastewater purification and other environmental aspects.

One-step synthesis of well-dispersed polypyrrole copolymers under gamma-ray irradiation

2021 ◽  
Vol 12 (5) ◽  
pp. 645-649
Author(s):  
Yu Gu ◽  
Yuqing Qiao ◽  
Yusen Meng ◽  
Ming Yu ◽  
Bowu Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gamma Ray ◽  
Gamma Ray Irradiation ◽  
One Step ◽  
First Time

Herein, we report for the first time the synthesis of polypyrrole copolymers with good solvent-dispersibility under gamma-ray irradiation at room temperature in air.

scholarly journals Synthesis and Characterisation of Functionalised-Graphene Oxide by Gamma-Ray Irradiation

2017 ◽  
Vol 13 ◽  
pp. 1-17 ◽  
Author(s):  
Noraniza Ahmad Daud ◽  
◽  
Woei Chieng Buong ◽  
Nor Azowa Ibrahim ◽  
Zainal Abidin Talib ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gamma Ray ◽  
Gamma Ray Irradiation

Tuning surface properties of graphene oxide quantum dots by gamma-ray irradiation

2016 ◽  
Vol 175 ◽  
pp. 88-93 ◽  
Author(s):  
Shunkai Lu ◽  
Fan Liao ◽  
Tao Wang ◽  
Lili Zhu ◽  
Mingwang Shao
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Surface Properties ◽  
Gamma Ray ◽  
Gamma Ray Irradiation ◽  
Graphene Oxide Quantum Dots

One-step synthesis of a suspended ultrathin graphene oxide film: Application in transmission electron microscopy

Micron ◽  
2015 ◽  
Vol 68 ◽  
pp. 23-26 ◽  
Author(s):  
D.A. Kirilenko ◽  
A.T. Dideykin ◽  
A.E. Aleksenskiy ◽  
A.A. Sitnikova ◽  
S.G. Konnikov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Graphene Oxide ◽  
Oxide Film ◽  
Transmission Electron ◽  
One Step

One-Step Solvothermal Synthesis of Tetranitro-Cobalt Phthalocyanine/Reduced Graphene Oxide Composite

NANO ◽  
2015 ◽  
Vol 10 (03) ◽  
pp. 1550045 ◽  
Author(s):  
Lijuan Zhang ◽  
Hejun Li ◽  
Qiangang Fu ◽  
Zhanwei Xu ◽  
Kezhi Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Rotating Disk ◽  
Rotating Disk Electrode ◽  
Cobalt Phthalocyanine ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Wide Range ◽  
One Step

Tetranitro-cobalt phthalocyanine/reduced graphene oxide (TNCoPc/RGO) composite was prepared using ethylene glycol as reducing agent and precursor. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR) were used to characterize the composite. The electrochemical performance of the composite was examined by cyclic voltammetry and rotating disk electrode. The SEM observation and UV-Vis absorption spectrophotometer reveal that TNCoPc nanoparticles are closely contacted with RGO. The results show that the composite has a larger peak current and a higher current density than TNCoPc for oxygen reduction in an alkaline medium. This work offers a simple and environmental route for the synthesis of metal phthalocyanine (MPc)/RGO, which is adaptable to a wide range of applications in fuel cells.

scholarly journals Evaluasi Keragaman Genetik Mutan Harapan Generasi MV1 Jeruk Keprok SoE (Citrus reticulata Blanco) Berdasarkan Penanda Morfologi dan ISSR

2016 ◽  
Vol 7 (2) ◽  
pp. 102
Author(s):  
Indriati Husain ◽  
Agus Purwito ◽  
Ali Husni ◽  
Kikin H. Mutaqin ◽  
Slamet Susanto
Keyword(s):  
Genetic Diversity ◽  
Gamma Irradiation ◽  
Genetic Distance ◽  
Embryogenic Callus ◽  
Irradiation Dose ◽  
Gamma Ray ◽  
Morphological Diversity ◽  
Issr Markers ◽  
Citrus Reticulata ◽  
Gamma Ray Irradiation

<p class="Abstrak"><em>ABSTRACT</em><em></em></p><p><em>Mandarin’s SoE is national <del cite="mailto:Windows%207" datetime="2016-10-31T15:54"></del>variety originated <del cite="mailto:Windows%207" datetime="2016-10-31T15:55"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins>from Mount of Mutis, Sub District of SoE, of Timur Tengah Selatan (TTS) District, East Nusa Tenggara (NTT). The genetic diversity of citrus can be induced by gamma ray irradiation on embryogenic callus cells thus producing new mutants. <del cite="mailto:Windows%207" datetime="2016-10-31T15:55"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins><del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del>Genetic diversity detection can be <ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>based on morphological and ISSR markers. The aim of this research was <del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>to obtain information on the genetic diversity <del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>on putative mutants<ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins> mandarin SoE induced by <ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>gamma ray irradiation <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del>based on morphology and markers ISSR. ISSR markers used are ISSR 1, 4, 6 and 8. Analysis of morphological diversity produced <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>a dendrogram with the level of similarity between individuals each irradiation dose 83-95% with <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>5-17% genetic distance. Dendrogram analysis based on the genetic diversity ISSR markers showed high levels of 51-100% similarity and genetic distance 0-49%. Individuals<del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del> samples obtained from<del cite="mailto:Windows%207" datetime="2016-10-31T15:58"></del><del cite="mailto:Windows%207" datetime="2016-10-31T15:58"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:58"></ins> gamma irradiation, based <ins cite="mailto:Windows%207" datetime="2016-10-31T15:58"></ins>both morphological and ISSR markers, was different from individual's genetic make up before irradiation.</em></p><p class="Abstrak"><em>Keywords</em><em>:</em><em> cluster, </em><em>gamma ray</em><em>, genetic distance, genetic diversity</em><em>s, </em><em>similarity</em></p><p class="Abstrak"> </p><p class="Abstrak">ABSTRAK</p><p>Jeruk keprok SoE adalah jeruk varietas unggul nasional yang berasal dari Pegunungan Mutis, Kecamatan SoE, Kabupaten Timur Tengah Selatan (TTS), Provinsi Nusa Tenggara Timur (NTT). Keragaman genetik jeruk ini dapat diinduksi dengan iradiasi sinar gamma pada sel-sel kalus embriogenik untuk menghasilkan mutan yang solid. Deteksi keragaman genetik yang terbentuk dapat dilakukan secara morfologi maupun molekuler dengan marka ISSR. Tujuan Penelitian ini adalah untuk mendapatkan informasi mengenai keragaman genetik yang terjadi pada mutan harapan jeruk keprok SoE hasil iradiasi sinar gamma berdasarkan morfologi dan marka ISSR. Marka ISSR yang digunakan adalah ISSR 1, 4, 6 dan 8 pada beberapa mutan harapan jeruk keprok SoE. Analisis keragaman secara morfologi menghasilkan dendrogram dengan tingkat kemiripan antar individu masing-masing dosis iradiasi 83-95% dengan jarak genetik 5-17%. Dendrogram analisis keragaman genetik berdasar marka ISSR memperlihatkan tingkat kemiripan 51-100% dan jarak genetik 0-49%. Individu-individu sampel yang diuji hasil iradiasi gamma, baik secara morfologi dan marka ISSR, telah memiliki susunan genetik yang berbeda dari susunan genetik individu sebelum diiradiasi.</p><p>Kata kunci: grup, jarak genetik, kemiripan, keragaman, sinar gamma</p>

scholarly journals The effect of gamma-irradiation on graphene oxide in a monoglyceride/ethanol solution

2016 ◽  
Vol 6 (3) ◽  
pp. 48-56
Author(s):  
Anh Tuyen Luu ◽  
Thuc Huy Ha ◽  
Thanh Duoc Nguyen ◽  
Binh Doan ◽  
Thu Hong Pham Thi
Keyword(s):  
Graphene Oxide ◽  
Gamma Irradiation ◽  
Absorbed Dose ◽  
Nitrogen Atmosphere ◽  
Ethanol Solution ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Etoh Solution ◽  
Irradiation Sample

Gamma-irradiation effects on graphene oxide (GO) in a monoglyceride/ethanol (MG/EtOH) solution was investigated.  GO was dispersed in MG/EtOH solution (GOM) with the GO: MG ratio of 1:10 (w/w). The prepared GOM was irradiated by g-ray under nitrogen atmosphere in a range of absorbed dose from 0 to 50 kGy. The characteristics and morphology of reduced GOM were analyzed by Ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). The results confirmed that the structure of reduced graphene oxide in monoglyceride solution was changed and exfoliated completely after g-ray irradiation at absorbed dose 50 kGy compared with non-irradiation sample.

Gamma Irradiation Assisted Synthesis of Ag/rGO Composites and their Surface Properties

2017 ◽  
Vol 898 ◽  
pp. 2224-2230
Author(s):  
Ying Liang ◽  
Bin Fang ◽  
Fang Fang Lin ◽  
Xu Min Zhu
Keyword(s):  
Graphene Oxide ◽  
Electron Microscope ◽  
Gamma Irradiation ◽  
Surface Properties ◽  
Photoelectron Spectroscopy ◽  
Absorbed Dose ◽  
Silver Ions ◽  
Broad Absorption Band ◽  
X Ray ◽  
Transmission Electron

Ag/rGO composites were synthesized under gamma irradiation using silver nitrate and graphene oxide (GO) as the starting materials. Comparing with traditional methods, gamma irradiation is a simple and “green” technique. In the irradiation system, silver ions were reduced to silver nanoparticles (AgNPs) by the electrons generated from the radiolysis of solvent. GO nanosheets provided reactive sites for the formation of AgNPs and acted as a colloidal surfactant preventing the aggregation of AgNPs. Meanwhile, GO were partially reduced to reduced graphene oxide (rGO). X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, Raman spectra and UV-Vis absorption spectra were applied for the characterization of Ag/rGO composites. The results showed that the absorbed dose (3.1 kGy, 4.7 kGy, 9.4 kGy and 27.4 kGy) plays an important role in the size distribution of AgNPs and the reduction degree of GO nanosheetes. The Ag/rGO composites exhibit a broad absorption band at visible light due to the surface plasmon resonance of AgNPs. Because of the unique surface properties, Ag/rGO composites behave enhanced performance for the adsorption of organic dye from water.

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