Low-Temperature and Large-Scale Production of a Transition Metal Sulfide Vertical Heterostructure and Its Application for Photodetectors

2021 ◽  
Vol 13 (7) ◽  
pp. 8710-8717
Author(s):  
Chaitanya Kaluram Kanade ◽  
Hyunho Seok ◽  
Vinit Kaluram Kanade ◽  
Kubra Aydin ◽  
Hyeong -U Kim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Large Scale ◽  
Metal Sulfide ◽  
Scale Production ◽  
Transition Metal Sulfide ◽  
Large Scale Production

Optimization of low-temperature poly-Si TFT-LCDs and a large-scale production line for large glass substrates

2001 ◽  
Vol 9 (3) ◽  
pp. 173-180 ◽  
Author(s):  
Kiyoshi Yoneda ◽  
Hidenori Ogata ◽  
Shinji Yuda ◽  
Kohji Suzuki ◽  
Toshifumi Yamaji ◽  
...  
Keyword(s):  
Low Temperature ◽  
Production Line ◽  
Large Scale ◽  
Scale Production ◽  
Glass Substrates ◽  
Large Glass ◽  
Large Scale Production

Low-Temperature Reduction of Graphene Oxide Using the HDDR Process for Electrochemical Supercapacitor Applications

2020 ◽  
Vol 1012 ◽  
pp. 141-146
Author(s):  
F.G. Benitez Jara ◽  
P. D. V. Cruz ◽  
Lusinete Pereira Barbosa ◽  
J.C.S. Casini ◽  
S. K. Sakata ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Large Scale ◽  
Oxide Powder ◽  
Processing Temperature ◽  
Scale Production ◽  
X Ray Diffraction ◽  
Promising Alternative ◽  
X Ray ◽  
Large Scale Production

In the present work, attempts of reducing a graphene oxide powder using a low temperature hydrogenation disproportionation desorption and the recombination process (L-HDDR) has been carried out. A lower processing temperature in large scale production is significant when costs are concerned. Graphite oxide was prepared using a modified Hummers’ method dispersed in ethanol and exfoliated using ultrasonication to produce Graphene Oxide (GO). Investigations have been carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The experimental results of L-HDDR processing graphene oxide powder, using unmixed hydrogen at 400°C and relatively low pressures (<2 bars) have been reported. X-ray diffraction patterns showed a reduction of graphene oxide with the L-HDDR process. The results showed that both processes, the L-HDDR as well as the standard HDDR, may be applied to the reduction of graphene oxide in order to produce supercapacitor materials. The advantage of employing the L-HDDR process is a relatively low temperature reducing the cost of treatment, what is a very important factor for producing a large amount of material. Thus, the L-HDDR process has been considered a promising alternative method of reducing graphene oxide with efficiency, with the possibility of large scale production.

Low Temperature Synthesis of TiO2 Nanorods with Tunable Aspect Ratios from Ti and NH4Cl Powders

2010 ◽  
Vol 97-101 ◽  
pp. 2148-2151
Author(s):  
Yan Liu ◽  
Yong Cai Zhang ◽  
Ming Zhang
Keyword(s):  
Low Temperature ◽  
Large Scale ◽  
Low Cost ◽  
Scale Production ◽  
X Ray Diffraction ◽  
Molar Ratios ◽  
Aspect Ratios ◽  
Large Scale Production ◽  
Tio2 Nanomaterials ◽  
Electronic Microscope

TiO2 nanorods with tunable aspect ratios were synthesized directly via heating different molar ratios of Ti and NH4Cl powders in air at 400 °C for 3 h. The resultant products have been characterized by means of X-ray diffraction (XRD), Raman spectra, and field emission scanning electronic microscope (FESEM). The proposed method is of simpleness, low temperature and low cost, which may be suitable for large scale production of multifunctional TiO2 nanomaterials

scholarly journals Mechanochemical synthesis of graphene oxide-supported transition metal catalysts for the oxidation of isoeugenol to vanillin

2017 ◽  
Vol 13 ◽  
pp. 1439-1445 ◽  
Author(s):  
Ana Franco ◽  
Sudipta De ◽  
Alina M Balu ◽  
Araceli Garcia ◽  
Rafael Luque
Keyword(s):  
Graphene Oxide ◽  
Transition Metal ◽  
Large Scale ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Efficient Production ◽  
Scale Production ◽  
Supported Metal Catalysts ◽  
Co Catalysts ◽  
Large Scale Production

Vanillin is one of the most commonly used natural products, which can also be produced from lignin-derived feedstocks. The chemical synthesis of vanillin is well-established in large-scale production from petrochemical-based starting materials. To overcome this problem, lignin-derived monomers (such as eugenol, isoeugenol, ferulic acid etc.) have been effectively used in the past few years. However, selective and efficient production of vanillin from these feedstocks still remains an issue to replace the existing process. In this work, new transition metal-based catalysts were proposed to investigate their efficiency in vanillin production. Reduced graphene oxide supported Fe and Co catalysts showed high conversion of isoeugenol under mild reaction conditions using H2O2 as oxidizing agent. Fe catalysts were more selective as compared to Co catalysts, providing a 63% vanillin selectivity at 61% conversion in 2 h. The mechanochemical process was demonstrated as an effective approach to prepare supported metal catalysts that exhibited high activity for the production of vanillin from isoeugenol.

Novel Low Temperature Chemical Synthesis and Characterization of Zinc Oxide Nanostructures

2008 ◽  
Vol 8 (8) ◽  
pp. 4290-4294
Author(s):  
P. K. Giri ◽  
S. Bhattacharyya ◽  
B. Chetia ◽  
B. K. Panigrahi ◽  
K. G. M. Nair ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Low Temperature ◽  
Large Scale ◽  
Hexagonal Phase ◽  
High Yield ◽  
Scale Production ◽  
Zinc Oxide Nanostructures ◽  
Step Method ◽  
Large Scale Production

We report a new and highly efficient method to synthesize zinc oxide (ZnO) nanostructures having a variety of sizes and shapes. A simple chemical reaction is followed that utilizes the oxidation of metallic zinc in the presence of an appropriate catalyst. This one-step method has advantages such as low temperature and atmospheric pressure synthesis, high yield of more than 90% and excellent optical and crystalline properties of the product. X-ray diffraction pattern of the samples shows hexagonal phase of ZnO with particles size in the range of 60–75 nm. Scanning electron microscope and transmission electron microscope images of the ZnO show hexagonal and rod-shaped nanoparticles. UV-visible spectra of the dispersed samples show strong absorption peaks at ∼378 nm. The photoluminescence spectra show a strong emission peak at ∼388 nm indicating good optical characteristics. The product formed is found to be dependent on the ratio of the starting materials and on other reaction conditions such as temperature, time etc. This method is suitable for large-scale production of nanosized ZnO and could be extended for the synthesis of other metal oxides, such as MgO etc.

Large scale production of highly conductive reduced graphene oxide sheets by a solvent-free low temperature reduction

Carbon ◽  
2014 ◽  
Vol 69 ◽  
pp. 327-335 ◽  
Author(s):  
Kyu Hyung Lee ◽  
Byeongno Lee ◽  
Son-Jong Hwang ◽  
Jae-Ung Lee ◽  
Hyeonsik Cheong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Large Scale ◽  
Solvent Free ◽  
Scale Production ◽  
Temperature Reduction ◽  
Large Scale Production ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

I. S. A. Baud. Forms of Production and Women's Labour: Gender Aspects of Industrialisation in India and Mexico. New Delhi: Sage Publications. 1992. 321 pp.Hardbound. Price: Indian Rs 295.00.

1993 ◽  
Vol 32 (1) ◽  
pp. 129-131
Author(s):  
Naureen Talha
Keyword(s):  
Large Scale ◽  
Indian Society ◽  
New Delhi ◽  
Scale Production ◽  
Female Labour ◽  
Self Employment ◽  
Commodity Production ◽  
Large Scale Production ◽  
Mexican Society ◽  
Small Production

The literature on female labour in Third World countries has become quite extensive. India, being comparatively more advanced industrially, and in view of its size and population, presents a pictures of multiplicity of problems which face the female labour market. However, the author has also included Mexico in this analytical study. It is interesting to see the characteristics of developing industrialisation in two different societies: the Indian society, which is conservative, and the Mexican society, which is progressive. In the first chapter of the book, the author explains that he is not concerned with the process of industrialisation and female labour employed at different levels of work, but that he is interested in forms of production and women's employment in large-scale production, petty commodity production, marginal small production, and self-employment in the informal sector. It is only by analysis of these forms that the picture of females having a lower status is understood in its social and political setting.

An Efficient and Improved Process for the Synthesis of Itopride Hydrochloride and Trimethobenzamide Hydrochloride

2018 ◽  
Vol 15 (4) ◽  
pp. 572-575 ◽  
Author(s):  
Ponnusamy Kannan ◽  
Samuel I.D. Presley ◽  
Pallikondaperumal Shanmugasundaram ◽  
Nagapillai Prakash ◽  
Deivanayagam Easwaramoorthy
Keyword(s):  
Large Scale ◽  
Hydroxylamine Hydrochloride ◽  
Scale Production ◽  
One Pot ◽  
Hydrochloride Salt ◽  
Environmental Friendly ◽  
Large Scale Production ◽  
Non Ulcer Dyspepsia ◽  
Itopride Hydrochloride ◽  
Yield And Purity

Aim and Objective: Itopride is a prokinetic agent used for treating conditions like non-ulcer dyspepsia. Itopride is administered as its hydrochloride salt. Trimethobenzamide is used for treating nausea and vomiting and administered as its hydrochloride salt. The aim is to develop a novel and environmental friendly method for large-scale production of itopride and trimethobenzamide. Materials and Methods: Itopride and trimethobenzamide can be prepared from a common intermediate 4- (dimethylaminoethoxy) benzyl amine. The intermediate is prepared from one pot synthesis using Phyrdroxybenzaldehye and zinc dust and further reaction of the intermediate with substituted methoxy benzoic acid along with boric acid and PEG gives itopride and trimethobenzamide. Results: The intermediate 4-(dimethylaminoethoxy) benzylamine is prepared by treating p-hydroxybenzaldehyde and 2-dimethylaminoethyl chloride. The aldehyde formed is treated with hydroxylamine hydrochloride. The intermediate is confirmed by NMR and the purity is analysed by HPLC. Conclusion: Both itopride and trimethobenzamide were successfully synthesized by this method. The developed method is environmental friendly, economical for large-scale production with good yield and purity.

scholarly journals Cyanobacteria—From the Oceans to the Potential Biotechnological and Biomedical Applications

Marine Drugs ◽  
2021 ◽  
Vol 19 (5) ◽  
pp. 241
Author(s):  
Shaden A. M. Khalifa ◽  
Eslam S. Shedid ◽  
Essa M. Saied ◽  
Amir Reza Jassbi ◽  
Fatemeh H. Jamebozorgi ◽  
...  
Keyword(s):  
Bioactive Compounds ◽  
Biomedical Applications ◽  
Large Scale ◽  
Biological Activities ◽  
Scale Production ◽  
Pharmacological Activities ◽  
Large Scale Production ◽  
Marine Products ◽  
Hiv 1 ◽  
Successful Phase

Cyanobacteria are photosynthetic prokaryotic organisms which represent a significant source of novel, bioactive, secondary metabolites, and they are also considered an abundant source of bioactive compounds/drugs, such as dolastatin, cryptophycin 1, curacin toyocamycin, phytoalexin, cyanovirin-N and phycocyanin. Some of these compounds have displayed promising results in successful Phase I, II, III and IV clinical trials. Additionally, the cyanobacterial compounds applied to medical research have demonstrated an exciting future with great potential to be developed into new medicines. Most of these compounds have exhibited strong pharmacological activities, including neurotoxicity, cytotoxicity and antiviral activity against HCMV, HSV-1, HHV-6 and HIV-1, so these metabolites could be promising candidates for COVID-19 treatment. Therefore, the effective large-scale production of natural marine products through synthesis is important for resolving the existing issues associated with chemical isolation, including small yields, and may be necessary to better investigate their biological activities. Herein, we highlight the total synthesized and stereochemical determinations of the cyanobacterial bioactive compounds. Furthermore, this review primarily focuses on the biotechnological applications of cyanobacteria, including applications as cosmetics, food supplements, and the nanobiotechnological applications of cyanobacterial bioactive compounds in potential medicinal applications for various human diseases are discussed.

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