Synthesis of polyaniline micro/nanospheres by a copper(ii)-catalyzed self-assembly method with superior adsorption capacity of organic dye from aqueous solution

2011 ◽  
Vol 21 (24) ◽  
pp. 8618 ◽  
Author(s):  
Xiao Guo ◽  
Guang Tao Fei ◽  
Hao Su ◽  
Li De Zhang
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Self Assembly ◽  
Organic Dye ◽  
Assembly Method

scholarly journals Study on the synthesis of porphyrin-modified copper ferrite as photocatalyst for treatment of mb organic dye in aqueous media

2020 ◽  
Vol 9 (3) ◽  
pp. 107-111
Author(s):  
Chinh Tran Van ◽  
Anh Nguyen Tuan ◽  
Phuong Nguyen Thi Hoai ◽  
Thuan Mai Huu ◽  
Khanh Tran Van ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Ferrite Nanoparticles ◽  
Organic Dye ◽  
Copper Ferrite ◽  
Simple Method ◽  
External Magnet ◽  
Porphyrin Derivatives

This work aims to modify the copper ferrite with a porphyrin derivatives by a simple method of self-assembly. The resultant porphyrin-modified copper ferrite was utilized as a photocatalyst for the removal of methyl blue dyes (MB) from aqueous solution. The results showed that the porphyrin nanofibers were well-intergrated with the copper ferrite nanoparticles. The porphyrin-modified copper ferrite materials exhibited the high photocatalytic performance toward MB dye with the removal percentage of approximately 100% after 200 minutes of irradiation under simulated light. The catalyst could be facilely separate by using a external magnet and reused.

scholarly journals Removal of Cu(II) Contamination from Aqueous Solution by Ethylenediamine@β-Zeolite Composite

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 978
Author(s):  
Peng Liu ◽  
Hui Ruan ◽  
Tiantian Li ◽  
Jiaqi Chen ◽  
Fuqiu Ma ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Environmental Conditions ◽  
Self Assembly ◽  
Low Cost ◽  
Amide Group ◽  
Suitable Candidate ◽  
Removal Process ◽  
Β Zeolite ◽  
Assembly Method ◽  
Zeolite Composite

The low cost β-zeolite and ethylenediamine modified β-zeolite (EDA@β-zeolite) were prepared by self-assembly method and used for Cu(II) removal from contaminated aqueous solution. Removal ability of β-zeolite toward Cu(II) was greatly improved after ethylenediamine (EDA) modification, the removal performance was greatly affected by environmental conditions. XPS results illustrated that the amide group played important role in the removal process by forming complexes with Cu(II). The EDA@β-zeolite showed desirable recycling ability. The finding herein suggested that the proposed composite is a promising and suitable candidate for the removal of Cu(II) from contaminated natural wastewater and aquifer.

scholarly journals Removal of Eriochrome Black T DYE from Aqueous Solution by Nickel/Aluminium Layered Double Hydroxide

2019 ◽  
Vol 1 (3) ◽  
pp. 79-86
Author(s):  
Nurdiyana Roslan ◽  
Mazidah Mamat ◽  
Ku Halim Ku Bulat
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Self Assembly ◽  
Freundlich Isotherm ◽  
Thermogravimetric Analyzer ◽  
Eriochrome Black T ◽  
Dye Pollutants ◽  
Assembly Method ◽  
Infrared Spectrophotometer ◽  
Double Hydroxide

Batik industry is well known in the East Coast of Malaysia, particularly in Terengganu and Kelantan. This industry consumes a lot of water for the batik making process which contributes to high discharge of wastewater containing excess dye pollutants. Hence, in this study, an anionic clay of nickel/aluminium-layered double hydroxide (NiAL) was investigated as a potential adsorbent for the removal of anionic dye of Eriochrome Black T (EBT). The NiAL was synthesized via self-assembly method and characterization of NiAL was carried out using powder X-ray diffraction (PXRD) and Fourier transform infrared spectrophotometer (FTIR). The composition and morphology of NiAL was further analyzed using carbon, hydrogen, nitrogen, sulphur elemental analyzer (CHNS), thermogravimetric analyzer (TGA) and scanning electron microscope (SEM). The potential of NiAL as an adsorbent for the removal of EBT in aqueous solution was tested at different dosages of NiAL. The adsorption ability was analyzed by using two common adsorption isotherms, which were Langmuir and Freundlich models. The adsorption of EBT onto NiAL was governed by Freundlich isotherm model indicating that the adsorption occurs in heterogeneous system.

Preparation of BSA Nanoparticles by Desolvation Technique Using Acetone as Desolvating Agent

2012 ◽  
Vol 5 (1) ◽  
pp. 1643-1647
Author(s):  
Krishna Sailaja A ◽  
Amareshwar P
Keyword(s):  
Aqueous Solution ◽  
Standard Deviation ◽  
Process Parameters ◽  
Self Assembly ◽  
Size Control ◽  
Polymeric Materials ◽  
Preparation Condition ◽  
Assembly Process ◽  
Average Size

In order to see the functionality and toxicity of nanoparticles in various food and drug applications, it is important to establish procedures to prepare nanoparticles of a controlled size. Desolvation is a thermodynamically driven self-assembly process for polymeric materials. In this study, we prepared BSA nanoparticles using the desolvation technique using acetone as desolvating agent. Acetone was added intermittently into 1% BSA solution at different pH under stirring at 700 rpm. Amount of acetone added, intermittent timeline of acetone addition, and pH of solution were considered as process parameters to be optimized. The effect of the process parameters on size of the nanoparticles was studied. The results indicated that the size control of BSA nanoparticles was achieved by adding acetone intermittently. The standard deviation of average size of BSA nanoparticles at each preparation condition was minimized by adding acetone intermittently. The intermittent addition in polymeric aqueous solution can be useful for size control for food or drug applications.  

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

2020 ◽  
Vol 71 (1) ◽  
pp. 1-12
Author(s):  
Salman H. Abbas ◽  
Younis M. Younis ◽  
Mohammed K. Hussain ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Particle Size ◽  
Adsorption Capacity ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Fungal Biomass ◽  
Solution Flow Rate ◽  
Maximum Adsorption Capacity ◽  
Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

Capillary flows and self-assembly of porous hydrate structures

2012 ◽  
Vol 9 (1) ◽  
pp. 22-25
Author(s):  
S.V. Amel’kin ◽  
D.Ye. Igoshin
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Self Assembly ◽  
Capillary Flow ◽  
Secondary Crystallization ◽  
Assembly Model ◽  
Physical Processes ◽  
Good Correspondence ◽  
Solution Formation ◽  
Capillary Flows

A self-assembly model for porous hydrate structures is proposed, which takes into account the sequence of basic physical processes: hydrate growth on the surface of the aqueous solution, formation of islet structure, capillary flow, separation and transfer of secondary crystallization nuclei to the meniscus. The model was studied within the cellular automata method. A good correspondence between the results of the simulation and the experimental data is obtained.

scholarly journals Self-Assembled Nanomaterials Based on Complementary Sn(IV) and Zn(II)-Porphyrins, and Their Photocatalytic Degradation for Rhodamine B Dye

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3598
Author(s):  
Nirmal K. Shee ◽  
Hee-Joon Kim
Keyword(s):  
Aqueous Solution ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Absorption Bands ◽  
Ligand Coordination ◽  
Rhodamine B Dye ◽  
Metal Ligand

A series of porphyrin triads (1–6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal–ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV–vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles.

High-efficient removal of U(VI) from aqueous solution by self-assembly pomelo peel/palygorskite composite

2021 ◽  
Author(s):  
Xiaofeng Huang ◽  
Qiulin Deng ◽  
Xingzhang Wang ◽  
Hongquan Deng ◽  
Tinghong Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Efficient Removal ◽  
Pomelo Peel ◽  
High Efficient

scholarly journals Self-assembly induced luminescence of Eu3+-complexes and application in bioimaging

2021 ◽  
Author(s):  
Ping-Ru Su ◽  
Tao Wang ◽  
Pan-Pan Zhou ◽  
Xiao-Xi Yang ◽  
Xiao-Xia Feng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Luminescence Intensity ◽  
Self Assembly ◽  
Room Temperature ◽  
Molecular Motion ◽  
Proof Of Concept ◽  
Room Temperature Phosphorescence ◽  
New Strategy ◽  
Size Controlled

Abstract Design and engineering of highly efficient emitting materials with assembly-induced luminescence, such as room temperature phosphorescence (RTP) and aggregation-induced emission (AIE), have stimulated extensive efforts. Here, we propose a new strategy to obtain size-controlled Eu3+-complex nanoparticles (Eu-NPs) with self-assembly induced luminescence (SAIL) characteristics without encapsulation or hybridization. Compared with previous RTP or AIE materials, the SAIL phenomena of increased luminescence intensity and lifetime in aqueous solution for the proposed Eu-NPs are due to the combined effect of self-assembly in confining the molecular motion and shielding the water quenching. As a proof of concept, we also show that this system can be further applied in bioimaging, temperature measurement and HClO sensing. The SAIL activity of the rare-earth (RE) system proposed here offers a further step forward on the roadmap for the development of RE light conversion systems and their integration in bioimaging and therapy applications.

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