Potassium-selective optical microsensors based on surface modified polystyrene microspheres

2014 ◽  
Vol 50 (35) ◽  
pp. 4592-4595 ◽  
Author(s):  
Xiaojiang Xie ◽  
Gastón A. Crespo ◽  
Jingying Zhai ◽  
István Szilágyi ◽  
Eric Bakker
Keyword(s):  
Surface Modification ◽  
Polystyrene Microspheres ◽  
Surface Modified ◽  
Modified Polystyrene ◽  
First Time

Ion-selective microspheres based on surface modification of polystyrene particles (0.8 and 2.4 μm, diameter) are presented here for the first time.

Morphology-Controlled 2D Ordered Microstructure Arrays by Surface Modification of Colloidal Template

2008 ◽  
Vol 8 (9) ◽  
pp. 4436-4440 ◽  
Author(s):  
Jian-Hong Lee ◽  
Ing-Chi Leu ◽  
Yi-Wen Chung ◽  
Min-Hsiung Hon
Keyword(s):  
Surface Characteristics ◽  
Two Dimensional ◽  
Polystyrene Spheres ◽  
Self Assembled Monolayer ◽  
Periodic Arrays ◽  
Colloidal Monolayer ◽  
Surface Modified ◽  
Modified Polystyrene ◽  
First Time ◽  
Structure Patterns

In this paper, we describe a convenient approach for fabricating two-dimensional, ordered TiO2 bowl-like structure and inverted-bowl-like structure patterns consisting of submicrometer arrays on a self-assembled monolayer film, for the first time using a surface-modified polystyrene colloidal monolayer as the template. Typically, the well-ordered two-dimensional TiO2 bowl-like structures were obtained by liquid phase deposition within the interstitial voids in assemblies of polystyrene spheres followed by the dissolution of the polystyrene template with dichloromethane. Otherwise, through a simple wet treatment by immersing in the sulfuric acid at 50 °C, the surface characteristics of polystyrene were turned from hydrophobic to hydrophilic. The ordered inverted-bowl-like structures could be prepared on this treated surface. We believe that this method could be extendable to colloidal template with smaller dimensions, and to periodic arrays made of other materials.

A novel, facile, layer-by-layer substrate surface modification for the fabrication of all-inkjet-printed flexible electronic devices on Kapton

2016 ◽  
Vol 4 (29) ◽  
pp. 7052-7060 ◽  
Author(s):  
Yunnan Fang ◽  
Jimmy G. D. Hester ◽  
Ben M. deGlee ◽  
Chia-Chi Tuan ◽  
Philip D. Brooke ◽  
...  
Keyword(s):  
Surface Modification ◽  
Substrate Surface ◽  
Electronic Devices ◽  
Layer By Layer ◽  
Flexible Electronic ◽  
Surface Modified ◽  
Weak Polyelectrolytes ◽  
First Time ◽  
Flexible Electronic Devices

Kapton HN films were surface modified, for the first time, by taking advantage of their additive and using only weak polyelectrolytes, for all-inkjet-printed flexible electronic devices.

Preparation of luminescent polystyrene microspheres via surface-modified route with rare earth (Eu3+ and Tb3+) complexes linked to 2,2′-bipyridine

Rare Metals ◽  
2014 ◽  
Vol 34 (8) ◽  
pp. 590-594 ◽  
Author(s):  
Zhen-Xiong Ma ◽  
Qi-Tao Zhang ◽  
Jun-Liang Liu ◽  
Chang-Hao Yan ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Polystyrene Microspheres ◽  
Surface Modified

scholarly journals Facile Preparation of Efficient WO3Photocatalysts Based on Surface Modification

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Min Liu ◽  
Hongmei Li ◽  
Yangsu Zeng
Keyword(s):  
Photocatalytic Activity ◽  
Surface Modification ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Impregnation Method ◽  
Light Spectra ◽  
Simple Strategy ◽  
Visible Light Active ◽  
Efficient Charge ◽  
Surface Modified

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

scholarly journals Enhancement of the Congo Red Adsorption Capacity of Biochars by Surface Modification with MgCl2 Pretreatment

2020 ◽  
Vol 42 (10) ◽  
pp. 472-481
Author(s):  
Hee So Oh ◽  
Jae-Soo Chang
Keyword(s):  
Surface Modification ◽  
Adsorption Isotherm ◽  
Adsorption Capacity ◽  
Congo Red ◽  
Raw Materials ◽  
Physicochemical Characteristics ◽  
Pine Sawdust ◽  
Adsorption Capacities ◽  
Initial Ph ◽  
Surface Modified

Objectives : The physicochemical characteristics of Mg-biochar composites derived from kelp and pine after pretreatment with MgCl2 were analyzed, and their adsorption capacities for an anionic dye, Congo red (CR), were evaluated.Methods : After pretreating 60 g of kelp and pine sawdust in 1 L of 0.1 M MgCl2･6H2O, the raw materials were pyrolyzed at 500℃ to produce Mg-biochar composites (kelp based KB-Mg and pine based PB-Mg). The fundamental physicochemical characteristics of the Mg-biochar composites were examined, and their adsorption capacities for CR were investigated using different initial pH values, adsorption kinetic models, and adsorption isotherm models.Results and discussion : The Mg-biochar composites showed the development of uniform deposits of Mg minerals primarily as MgO crystal on the surface by the surface modification with MgCl2. When the pristine biochars were surface-modified with MgCl2, their adsorption capacities for CR were significantly increased over the entire pH range tested. The CR adsorption process by all biochars was best described with the pseudo-first order kinetics model, and the adsorption isotherm characteristics were better described with the Langmuir isotherm model for all biochars. The Langmuir maximum adsorption capacities for KB-Mg and PB-Mg were 423.0 mg/g and 394.7 mg/g, respectively. It is suggested that the main mechanism for CR adsorption on the Mg-biochars is electrostatic attraction between CR and the biochars.Conclusions : The results showed that surface modification with MgCl2 could greatly enhance the CR adsorption capacity of biochars, and the results demonstrated the great potential of KB-Mg and PB-Mg for CR removal.

scholarly journals Synthesis and characterization of thiol-polystyrene microsphere and its adsorption properties of thallium

2021 ◽  
Vol 237 ◽  
pp. 01001
Author(s):  
Youze Xu ◽  
Yuehui Chen ◽  
Yuanyuan Zhao ◽  
Shuang Zhou ◽  
Guangyi Fu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Raw Materials ◽  
Removal Rate ◽  
Adsorption Properties ◽  
Membrane Diffusion ◽  
Polystyrene Microspheres ◽  
Polystyrene Microsphere ◽  
Control Step ◽  
Ft Ir ◽  
Modified Polystyrene

Thallium (Tl) is highly toxic in the environment. In order to solve the harm of Tl pollution to the environment, thiol-polystyrene microsphere (TPM) with good adsorption properties for Tl were prepared in this paper. The GAUSSIAN software was used to calculate the adsorption performance of the TPM on Tl+, and the adsorption mechanism was discussed. The thermogravimetric analysis show that the TPM prepared with chloromethyl polystyrene microspheres (CPM) and thiourea as the main raw materials has good chemical thermal stability. In the Tl+ solution of 1mg/L, the adsorption and removal rate of the TPMs in was 99%, with a significant adsorption of Tl+ properties. When the dosage of TPM is 0.4L/g, pH is 6-10, temperature is 5-20 °C, and adsorption time reaches 640min, thallium-containing water with Tl+ concentration of 5mg/L can be treated to within the national discharge standard (5μg/L). The analytical effect of 0.5mol/L dilute sulfuric acid on TPM can reach 99.96%, and the adsorption capacity of TPM on Tl+ is reduced by only 0.1% after repeated use 4 times, which has good regeneration performance. The modified polystyrene microspheres were characterized by EDS, FT-IR, Raman spectra and XPS, and it was proved that the TPM were ligated with Tl+ through the grafted mercapto group, so as to adsorb and remove Tl+ from the solution. According to the isotherm and kinetic model of TPM adsorption Tl+, the maximum saturated adsorption amount of TPM to Tl+ can reach 3.47mg/g, mainly chemical adsorption, and the membrane diffusion stage is the main control step of TPM adsorption Tl+. The results showed that the TPM could be a promising adsorbent with good adsorption capacity and reusability for Tl+ removal from wastewater

Surface modification of ferrite nanoparticles with dicarboxylic acids for the synthesis of 5-hydroxymethylfurfural: a novel and green protocol

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76795-76801 ◽  
Author(s):  
Melad Shaikh ◽  
Mahendra Sahu ◽  
Kiran Kumar Atyam ◽  
Kalluri V. S. Ranganath
Keyword(s):  
Surface Modification ◽  
Dicarboxylic Acids ◽  
Ferrite Nanoparticles ◽  
Solvent Free ◽  
Green Protocol ◽  
Flexible Ligand ◽  
Solvent Free Conditions ◽  
Surface Modified

5-Hydroxymethylfurfural (5-HMF) has been synthesized under solvent free conditions using surface modified ferrite nanoparticles. The flexible ligand modified ferrites showed higher activity than rigid modified ferrites.

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