A versatile method to prepare size- and shape-controlled copper nanocubes using an aqueous phase green synthesis

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91949-91955 ◽  
Author(s):  
Thulitha Abeywickrama ◽  
Niharika Neerudu Sreeramulu ◽  
Lan Xu ◽  
Hemali Rathnayake
Keyword(s):  
Aqueous Solution ◽  
Green Synthesis ◽  
Aqueous Phase ◽  
Room Temperature ◽  
Environmentally Friendly ◽  
Size And Shape ◽  
Controlled Morphology ◽  
Shape Controlled ◽  
Environmentally Friendly Method

A versatile, simple, and environmentally friendly method of preparing copper nanocubes with controlled morphology in aqueous solution at room temperature is demonstrated to make Cu nanocubes with sizes of 100 ± 35 nm.

Environmentally Friendly Aqueous Solution Synthesis of Hierarchical CaWO4 Microspheres at Room Temperature

2008 ◽  
Vol 8 (3) ◽  
pp. 1288-1294 ◽  
Author(s):  
Wenshou Wang ◽  
Liang Zhen ◽  
Chengyan Xu ◽  
Baoyou Zhang ◽  
Wenzhu Shao
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Large Scale ◽  
Room Temperature ◽  
Blue Emission ◽  
Environmentally Friendly ◽  
Average Diameter ◽  
Solution Synthesis ◽  
Chemical Route ◽  
Hierarchical Microspheres

An environmentally friendly route for the synthesis of hierarchical CaWO4 microspheres with novel morphology at room temperature has been successfully developed. CaCl2 and Na2WO4 were used as reaction regents, and distilled water was used as an environmentally friendly solvent. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence spectroscopy. This green wet-chemical route provides a simple, one-step, low-cost approach for the large-scale synthesis of hierarchical CaWO4 microspheres with relatively uniform diameters of 3–6 μm. The hierarchical microspheres are built up with numerous nanorods with an average diameter of 50 nm, which are radially oriented to the microsphere center. SEM observations of different intermediates indicate the possible growth process, in which the hierarchical structure growth is from nuclei through kayak-like, rod-like, peanut-like, dumbbell-like, and peach-like structures to final microspheres, via "self-assembled preferential end growth" of kayak-like particles in aqueous solution. The hierarchical CaWO4 micro-spheres exhibit a strong, broad blue emission peak of 412 nm.

scholarly journals Anthranilic acids from isatin: an efficient, versatile and environmentally friendly method

2015 ◽  
Vol 87 (3) ◽  
pp. 1525-1529 ◽  
Author(s):  
GABRIEL F. RIO ◽  
BÁRBARA V. SILVA ◽  
SABRINA T. MARTINEZ ◽  
ANGELO C. PINTO
Keyword(s):  
Reaction Time ◽  
Nitrogen Atom ◽  
Aromatic Ring ◽  
Room Temperature ◽  
Environmentally Friendly ◽  
Reaction Conditions ◽  
Anthranilic Acids ◽  
Environmentally Friendly Method

This paper describes the preparation of a series of 16 anthranilic acids in yields ranging from 51 to 97%, by treating the isatins with NaOH and H2O2. Independently of the nature of the substituent on the aromatic ring, the reactions were complete in 15 min at room temperature, whereas those of isatins containing a substituent on the nitrogen atom required longer reaction time for completion (45 min) under the same reaction conditions.

scholarly journals Green Synthesis of Silver Nanoparticles Using Local Honey

Nano Hybrids ◽  
2013 ◽  
Vol 4 ◽  
pp. 87-98 ◽  
Author(s):  
Haroon Haiza ◽  
A. Azizan ◽  
Aizat Hazwan Mohidin ◽  
D.S.C. Halin
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Room Temperature ◽  
Synthesis Method ◽  
Cost Effective ◽  
Sem Analysis ◽  
Dimethyl Formamide ◽  
Reactive Chemicals ◽  
Visible Spectra

In this work, silver nanoparticles have been successfully prepared with a simple, cost-effective and reproducible aqueous room temperature green synthesis method. Honey was chosen as the eco-friendly reducing and stabilizing agent replacing most reported reducing agents such as hydrazine, sodium borohydride (NaBH4) and dimethyl formamide (DMF) which are highly reactive chemicals but also pose a biological risk to the society and environment. The size and shape of silver nanoparticles were modulated by varying the honey concentration and pH of the aqueous solution that contain silver nitrate as the silver precursor, sodium hydroxide as the pH regulator and ethylene glycol as the solvent. The silver nanoparticles obtained are characterized by field-emission scanning electron microscope (FESEM), ultraviolet-visible spectra (UV-Vis) and Fourier transform infrared spectroscopy (FTIR). From SEM analysis, it was found that by increasing the concentration of honey, the size of silver nanoparticles produced decreased, from the range of 18.98 nm - 26.05 nm for 10 g of honey to 15.63 nm - 17.86 nm for 40 g of honey. Similarly, the particle size decreased as the pH of the aqueous solution increased. UV-Vis spectra revealed large anisotropic and polydispersed Ag nanoparticle were produced.

Iron or boron-catalyzed C–H arylthiation of substituted phenols at room temperature

2014 ◽  
Vol 50 (64) ◽  
pp. 8875-8877 ◽  
Author(s):  
Hua Tian ◽  
Changjin Zhu ◽  
Haijun Yang ◽  
Hua Fu
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Substituted Phenols ◽  
Environmentally Friendly Method

A simple, efficient and environmentally friendly method for iron or boron-catalyzed C–H arylthiation of substituted phenols at room temperature has been developed, and the corresponding diaryl sulfides were prepared in good to excellent yields.

scholarly journals Environmentally Friendly Method of Silicon Recycling: Synthesis of Silica Nanoparticles in an Aqueous Solution

2020 ◽  
Vol 8 (37) ◽  
pp. 14006-14012
Author(s):  
Julia V. Bondareva ◽  
Timur F. Aslyamov ◽  
Alexander G. Kvashnin ◽  
Pavel V. Dyakonov ◽  
Yulia O. Kuzminova ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Environmentally Friendly ◽  
Environmentally Friendly Method

Study on a polyacrylate-based waterborne coating: facile preparation, convenient self-healing behavior and photoluminescence properties

2020 ◽  
Vol 8 (36) ◽  
pp. 12638-12647
Author(s):  
Bo Wu ◽  
Anqian Yuan ◽  
Yao Xiao ◽  
Yi Wang ◽  
Jingxin Lei
Keyword(s):  
Room Temperature ◽  
Environmentally Friendly ◽  
Waterborne Coating ◽  
Self Healing ◽  
Photoluminescence Properties ◽  
Facile Preparation ◽  
Environmentally Friendly Method

A facile and environmentally friendly method towards mechanically robust, highly transparent, room temperature self-healing coatings.

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