Facile Synthesis of Mono-Dispersed Polystyrene (PS)/Ag Composite Microspheres via Modified Chemical Reduction

Zhu, Wen; Wu, Yuanyuan; Yan, Chao‐Guo; Wang, Chengyin; Zhang, Ming; Wu, Zhonglian

doi:10.3390/ma6125625

Cited by 35 publications

(27 citation statements)

References 38 publications

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“…FTIR spectra of samples S1, S2, S3 and S4 are acquired, and presented in Figure . The FTIR spectrum of S1 corresponds to the typical FTIR spectrum of PS reported elsewhere . Upon adding the manganese salt and NH 4 F to the PS dispersion, the FTIR spectrum (Figure ) of the resulting sample S2 shows the PS peaks which are significantly weakened.…”

Section: Resultsmentioning

confidence: 53%

Fabrication and Characterization of Manganese‐based Self‐assembled Cubic Structures

et al. 2018

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Self‐assembled cubic structures of manganese‐based nanomaterials were achieved successfully, in case of manganese fluoride, for the very first time. The indirect synthesis of manganese oxide (Mn2O3) and manganese fluoride (MnF2/MnF3) self‐assembly involved an individual two step synthesis protocol. In first step of the protocol, NH4MnF3 self‐assembled cubic structures were fabricated by a simple liquid phase reaction using polystyrene (PS) as structure directing agent (SDA), while manganese nitrate tetrahydrate (Mn(NO3)2.4H2O) and ammonium fluoride (NH4F) as manganese and fluorine sources, respectively. In second step, the NH4MnF3 was transformed by calcination to manganese oxide (Mn2O3) at 450 °C for 5 hours under open atmosphere (air/O2), and individually, to manganese fluoride (MnF2/MnF3) at 350 °C for 5 hours under pure molecular fluorine (F2) environment. The temperature regimes for the transformation reactions were deduced from thermogravimetric analysis (TGA). The crystal structures and the compositions of all the samples were established by powder X‐rays diffraction (PXRD). Further, structural characterizations were carried out by spectroscopic analyses. The key objective, preservation of self‐assembled cubic structures in the resulting manganese oxide and fluoride, were confirmed by electron microscopic analyses. The self‐assembly structures formation mechanism was illustrated based on the transmission electron microscopy (TEM) and scanning electron microscopy (SEM) results.

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Section: Resultsmentioning

confidence: 53%

Fabrication and Characterization of Manganese‐based Self‐assembled Cubic Structures

et al. 2018

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“…It is reported that addition of metal nanoparticles can enhance the thermal conductivity and heat transfer of fluid (Sheikholeslami 2017a, b;Sheikholeslami and Vajravelu 2017). Incorporation of noble metals in polystyrene for the synthesis of composite has potential advantages in optoelectronic, catalyst, and chemical sensors applications (Alekseeva et al 2013;Zhu et al 2013;Khokhar et al 2011;Higuchi et al 2016). Xia et al (2014) increased the power conversion efficiency of organic/Si hybrid solar cells by incorporating of gold into poly (3,4-ethylenedioxythiophene)/polystyrenesulfonate due to light trapping.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

2017

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In this paper, methyl-orange-doped polystyrene (PS) microspheres covered with gold and silver nanoparticles (NPs) have been synthesized. The optical and structural properties of the porous polystyrene films before and after incorporation of Au and Ag nanoparticles were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transformation infrared spectrophotometer (FT-IR), and UV-Vis spectrophotometer. The optical data showed that the optical energy gap of PS film was increased from 2 to 3.4 eV and to 3.5 eV after being filled with Ag and Au nanoparticles, respectively. The electrical and photoresponse properties of Ag-PS/p-Si and Au-PS/pSi heterojunctions were studied. The rectification characteristics of the junction were improved after nanoparticle incorporation. The photoresponse results confirm the presence of two peaks of response located at 450 and 900 nm. The Au-PS/Si heterojunction gave the best photosensitivity.

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“…The molar ratio of monomer NIPAM, crosslinker N,N ′‐methylenebisacrylamide, and initiator potassium persulfate was 200:10:3. The resultant PNIPAM nanogels were purified by centrifugation at 8000 rpm and 10 ºC, and then freeze‐dried for 48 h. Subsequently, 0.5 g dried PNIPAM nanogels were well dispersed into 100 mL of tris hydrochloride buffer (15 × 10 −3 m , pH = 8.5), and then 0.2 g dopamine was added to form the PDA layer on the PNIPAM nanogels at 25 ºC for 2 h . The resultant PDA coated nanogels were washed by centrifugation.…”

Section: Methodsmentioning

confidence: 99%

A Novel Thermoresponsive Catalytic Membrane with Multiscale Pores Prepared via Vapor‐Induced Phase Separation

Xie

Luo

Zhang

et al. 2018

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A novel thermoresponsive catalytic polyethersulfone membrane with multiscale pores is developed by constructing silver nanoparticles (Ag NPs) loaded poly(N-isopropylacrylamide) (PNIPAM) nanogels on pore walls of cellular pores as thermoresponsive gates and catalysts via vapor-induced phase separation. The Ag NPs are stably immobilized on the PNIPAM nanogels by an in situ reduction method based on the versatile adhesion and reduction properties of polydopamine. The micrometer cellular pores decorated with Ag NPs loaded PNIPAM nanogels are formed throughout the membrane and act as numerous microreactors with a large pore surface. The proposed membrane exhibits both satisfactory thermoresponsive characteristics and stable catalytic properties. The effects of operation temperature and reactant concentration of feed solution on the catalytic properties are investigated systematically. The results show that the apparent kinetic rate constant of catalytic reduction of 4-nitrophenol (4-NP) in water by reductant sodium borohydride (NaBH ), is ranging from 3.7 to 37.9 min at temperatures from 20 to 45 ºC and the molar ratio of NaBH to 4-NP from 100:1 to 500:1. When the reactant concentration in feed solution fluctuates, the permeability or throughput of the membrane is simply adjusted by virtue of the thermoresponsive characteristics of membranes to achieve high catalytic conversion of reactant.

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Facile Synthesis of Mono-Dispersed Polystyrene (PS)/Ag Composite Microspheres via Modified Chemical Reduction

Cited by 35 publications

References 38 publications

Fabrication and Characterization of Manganese‐based Self‐assembled Cubic Structures

Fabrication and Characterization of Manganese‐based Self‐assembled Cubic Structures

Preparation and properties of polystyrene incorporated with gold and silver nanoparticles for optoelectronic applications

A Novel Thermoresponsive Catalytic Membrane with Multiscale Pores Prepared via Vapor‐Induced Phase Separation

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