نتایج جستجو برای: cationic dyes

تعداد نتایج: 38044  

2017
Peige Qin Yixin Yang Xiaoting Zhang Jiahua Niu Hui Yang Shufang Tian Jinhua Zhu Minghua Lu

In this work, a highly efficient and rapid method for simultaneously removing cationic dyes from aqueous solutions was developed by using monodispersed mesoporous silica nanoparticles (MSNs) as the adsorbents. The MSNs were prepared by a facile one-pot method and characterized by scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, and Brunaue...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2013
M S Bootharaju T Pradeep

We report a facile and rapid (less than 15 min) synthesis of atomically precise, dithiol-protected, silver quantum cluster, Ag7(DMSA)4 (DMSA: meso-2,3-dimercaptosuccinic acid), through a modified solid state route. The as-synthesized cluster exhibits molecular optical absorption features with a prominent λmax at ~500 nm. Composition of the cluster was confirmed using various spectroscopic and m...

Journal: :Chemical communications 2015
Paul E Reyes-Gutiérrez Michael Jirásek Lukáš Severa Pavlína Novotná Dušan Koval Petra Sázelová Jan Vávra Andreas Meyer Ivana Císařová David Šaman Radek Pohl Petr Štěpánek Petr Slavíček Benjamin J Coe Miroslav Hájek Václav Kašička Marie Urbanová Filip Teplý

Helquat dyes are the first helicene-like cationic styryl dyes obtained as separate enantiomers. Their remarkable chiroptical properties are due to the unique combination of a cationic hemicyanine chromophore and a helicene-like motif. The magnitude of the ECD response and the pH switching along with their positioning in the visible region are unprecedented among helicenoids.

2018
Qihang Zhao Yongxing Xing Zhiliang Liu Jing Ouyang Chunfang Du

The synthesis and characterization of BiOCl and Fe3+-grafted BiOCl (Fe/BiOCl) is reported that are developed as efficient adsorbents for the removal of cationic dyes rhodamine B (RhB) and methylene blue (MB) as well as anionic dyes methyl orange (MO) and acid orange (AO) from aqueous solutions with low concentration of 0.01~0.04 mmol/L. Characterizations by various techniques indicate that Fe3+...

کاویانی, سپیده , حسنی نژاد درزی, سید کریم, دیانتی تیلکی, رمضانعلی, یزدانی, جمشید,

Background and purpose: Adsorption processes are widely used in removing pollutants from waste waters, particularly those that are not easily biodegradable such as dyes. In this study natural zeolite, which is easily found in many places, was used as a low-cost adsorbent for removal of dye from effluents. Materials and methods: Adsorption of Azo dyes including two basic and one reactive (React...

Journal: :Dalton transactions 2015
Pei-Yao Du Hui Li Xin Fu Wen Gu Xin Liu

A 1D anionic lanthanide coordination polymer {[(CH(3))(2)NH(2)] [(H(2)abtc)(2)Ho(H(2)O)]}n () (H(4)abtc = 3,3',5,5'-azobenzene-tetracarboxylic acid) has been synthesized under hydrothermal reaction conditions. The protonated [(CH(3))(2)NH(2)](+) is generated from decomposed DMA during the reaction, and balances the negative charge of the framework. The as-obtained samples were characterized usi...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1971

Journal: :Journal of Synthetic Organic Chemistry, Japan 1960

2013
Reza Ansari Babak Seyghali

In this paper, application of sawdust prepared from Narra wood (SD) modified with cationic surfactant of cetyltrimethylammonium bromide (SD/CTAB) was used for removal of two typical acid dyes commercially named as Acid Green 25 (AG25) and Acid Red 14 (AR14) from aqueous solutions. The effects of experimental variables, such as pH, initial dye concentration, adsorbent dose, contact time and temp...

Journal: :Analytical and bioanalytical chemistry 2009
Amy R Stefan Christopher R Dockery Brittany M Baguley Brandi C Vann Alexander A Nieuwland James E Hendrix Stephen L Morgan

Designed experiments based on a simplex mixture design were employed to explore the effects of three solvent components (water, formic acid, and aqueous acetic acid), extraction time, and extraction temperature for the automated microextraction of basic (cationic) dyes from acrylic fibers. Extractions were conducted by an automated liquid handling system, and dye extraction was evaluated using ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید