scholarly journals Phenol Abatement by Titanium Dioxide Photocatalysts: Effect of The Graphene Oxide Loading

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 947 ◽  
Author(s):  
Usuma Naknikham ◽  
Giuliana Magnacca ◽  
Ang Qiao ◽  
Peter Kjær Kristensen ◽  
Vittorio Boffa ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Negative Impact ◽  
Sol Gel ◽  
Pure Tio2 ◽  
Synthetic Approach ◽  
Scale Production ◽  
Large Scale Production ◽  
Methods Of Synthesis ◽  
Photocatalytic Performances

Hetero-photocatalytic graphene-TiO2 materials have, in the literature, been found to possess better photocatalytic activity for environmental applications compared to pure TiO2. These types of materials can be prepared in different ways; however, their photocatalytic performance and quality are not easily controlled and reproduced. Therefore, we synthetized graphene oxide-TiO2 nanoparticles by sol-gel reaction from TiCl4, as precursor, with two different methods of synthesis and with a graphene oxide (GO) loading ranging from 0 to 1.0. This approach led to a good adhesion of GO to TiO2 through the Ti-O-C bonding, which could enhance the photocatalytic performances of the materials. Overall, 0.05 wt % GO loading gave the highest rate in the photodegradation of phenol under visible light, while higher GO loadings had a negative impact on the photocatalytic performances of the composites. The 0.05 wt % GO-TiO2 composite material was confirmed to be a promising photocatalyst for water pollutant abatement. The designed synthetic approach could easily be implemented in large-scale production of the GO-TiO2 coupling materials.

Large-scale production of high-quality reduced graphene oxide

2013 ◽  
Vol 233 ◽  
pp. 297-304 ◽  
Author(s):  
Shichoon Lee ◽  
Sung Hun Eom ◽  
Jin Suk Chung ◽  
Seung Hyun Hur
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Scale Production ◽  
High Quality ◽  
Large Scale Production ◽  
Reduced Graphene

scholarly journals Novel Green Synthesis of Graphene Layers using Zante Currants and Graphene Oxide

2018 ◽  
Vol 34 (6) ◽  
pp. 2832-2837 ◽  
Author(s):  
Mohd Zaid Ansari ◽  
Mohammad Nadeem Lone ◽  
Shabana Sajid ◽  
Weqar Ahmad Siddiqui
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Uv Spectrophotometry ◽  
Scale Production ◽  
Graphene Layers ◽  
Large Scale Production ◽  
Reduced Graphene ◽  
Reduction Effect ◽  
First Time ◽  
Facile Route

The present work shows a facile route for the preparation of graphene layers and for the first time Zante currants extract used for the effective deoxygenation of graphene oxide has been reported. Zante currants (ZC) extract reduce effectively GO into few layered structures of graphene (FLG). The morphology of few layers graphene and graphene oxide (GO) were investigated by SEM and TEM. Reduction effect on graphene oxide confirm by other technique like Raman, FTIR, XRD and UV spectrophotometry. This procedure keep away the use of hazardous chemicals, thus providing a new hope for large scale production of chemically reduced graphene.

scholarly journals A Green Approach for Highly Reduction of Graphene Oxide by Supercritical Fluid

2014 ◽  
Vol 1004-1005 ◽  
pp. 1013-1016 ◽  
Author(s):  
Chang Yi Kong ◽  
Yuuki Shiratori ◽  
Takeshi Sako ◽  
Futoshi Iwata
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Supercritical Fluid ◽  
Large Scale ◽  
Scale Production ◽  
Graphene Oxides ◽  
Practical Applications ◽  
Green Approach ◽  
Large Scale Production ◽  
Reduced Graphene

A green method to synthesize the reduced graphene oxide using supercritical fluid has been developed, which is an environmentally friendly and efficient route. The reduced graphene oxide has been examined by X-ray diffraction, Raman spectroscopy. We have also studied the effects of reduction temperatures and supercritical fluids on the electrical properties of reduced graphene oxide. It was found that ethanol has higher reducing capability than CO2at all temperatures (200 - 400°C) examined in this study for graphene oxide reduction. As a result, reduced graphene oxide (6300 S/m) from supercritical ethanol treatment has 5 times as high conductivity as that from supercritical CO2treatment at the reduction temperature of 400°C. This green process is applicable for large scale production of reduced graphene oxides for various practical applications.

Simple approach for large-scale production of reduced graphene oxide films

2014 ◽  
Vol 243 ◽  
pp. 340-346 ◽  
Author(s):  
Ming Zhang ◽  
Bin Gao ◽  
Diana C. Vanegas ◽  
Eric S. McLamore ◽  
June Fang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Oxide Films ◽  
Simple Approach ◽  
Scale Production ◽  
Large Scale Production ◽  
Reduced Graphene

scholarly journals A Facile Method for Batch Preparation of Electrochemically Reduced Graphene Oxide

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 376 ◽  
Author(s):  
Yi-Fang Hung ◽  
Chia Cheng ◽  
Chun-Kai Huang ◽  
Chii-Rong Yang
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Reduction ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Reduction Technique ◽  
Chemical Agent ◽  
Scale Production ◽  
Large Scale Production ◽  
Electrochemically Reduced Graphene Oxide ◽  
Π Stacking Interaction

The electrochemical reduction of graphene oxide (GO) is an environmentally friendly and energy-saving method for improving the characteristics of GO. However, GO films must be coated on the cathode electrode in advance when usingthis technique. Thus, the formed electrochemically reduced GO (ERGO) films can be used only as sensing or conductive materials in devices because mass production of the flakes is not possible. Therefore, this study proposes a facile electrochemical reduction technique. In this technique, GO flakes can be directly used as reduced materials, and no GO films are required in advance. A 0.1 M phosphate buffered saline solution was used as the electrolyte, which is a highly safe chemical agent. Experimental results revealed that the as-prepared GO flakes were electrochemically reduced to form ERGO flakes by using a −10 V bias for 8 h. The ratio of the D-band and G-band feature peaks was increased from 0.86 to 1.12, as revealed by Raman spectroscopy, the π-π stacking interaction operating between the ERGO and GO has been revealed by UV-Vis absorption spectroscopy, and the C–O ratio was increased from 2.02 to 2.56, as indicated by X-ray photoelectron spectroscopy. The electrical conductivity of the ERGO film (3.83 × 10−1 S·cm−1) was considerably better than that of the GO film (7.92 × 10−4 S·cm−1). These results demonstrate that the proposed electrochemical reduction technique can provide high-quality ERGO flakes and that it has potential for large-scale production.

scholarly journals Nanomaterial Fabrication through the Modification of Sol–Gel Derived Coatings

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 181
Author(s):  
Wai Kian Tan ◽  
Hiroyuki Muto ◽  
Go Kawamura ◽  
Zainovia Lockman ◽  
Atsunori Matsuda
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Sol Gel ◽  
Materials Processing ◽  
Scale Production ◽  
Gel Method ◽  
Sol Gel Method ◽  
The Past ◽  
Large Scale Production ◽  
Gel Technique

In materials processing, the sol–gel method is one of the techniques that has enabled large-scale production at low cost in the past few decades. The versatility of the method has been proven as the fabrication of various materials ranging from metallic, inorganic, organic, and hybrid has been reported. In this review, a brief introduction of the sol–gel technique is provided and followed by a discussion of the significance of this method for materials processing and development leading to the creation of novel materials through sol–gel derived coatings. The controlled modification of sol–gel derived coatings and their respective applications are also described. Finally, current development and the outlook of the sol–gel method for the design and fabrication of nanomaterials in various fields are described. The emphasis is on the significant potential of the sol–gel method for the development of new, emerging technologies.

scholarly journals Preliminary Economic Study on the Production of ZnO Nanoparticles Using a Sol-Gel Synthesis Method

2019 ◽  
Vol 21 (1) ◽  
pp. 1-6
Author(s):  
Fikri Aziz Shalahuddin ◽  
Sera Serinda Almekahdinah ◽  
Asep Bayu Dani Nandiyanto
Keyword(s):  
Economic Evaluation ◽  
Zno Nanoparticles ◽  
Large Scale ◽  
Sol Gel ◽  
Synthesis Method ◽  
Raw Material ◽  
Scale Production ◽  
Material Cost ◽  
Large Scale Production ◽  
Sol Gel Synthesis

The economic evaluation is one of the key points in building chemical industries. This paper presented a preliminary economic evaluation of the large scale production of zinc oxide (ZnO) nanoparticles using the sol-gel method, which is very useful for helping decision whether the fabrication of this material profitable or not. Particularly, the study was done by changing the cost of raw material, which was compared to several economic parameters such as GPM, PBP, and CNPV. The result showed that the project was profitable by increasing raw material cost below 100% from the estimated raw material cost, informing the fact for the prospective fabrication for fulfilling the demand of ZnO nanoparticles.

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