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Journal of Colloid and Interface Science

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https://www.readbyqxmd.com/read/29793171/compositional-engineering-of-acceptors-for-highly-efficient-bulk-heterojunction-hybrid-organic-solar-cells
#1
S Amber Yousaf, M Ikram, S Ali
The wet chemical synthesis of chromium oxide (Cr2 O3 ) nanoparticles (NPs) and its application in active layer of inverted bulk heterojunction organic solar cells is documented in this research. Chromium oxide NPs of 10-30 nm size range having a band gap of 2.9 eV were successfully synthesized. These NPs were used in inverted organic solar cells in amalgamation with P3HT:PCBM and PTB7:PCBM polymers. The fabricated hybrid devices improves PCE significantly for P3HT:PCBM and PTB7:PCBM systems. The photophysical energy levels, optoelectrical properties and microscopic images have been systematically studied for the fabricated devices...
May 21, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793173/ag-nanoparticles-loading-of-polypyrrole-coated-superwetting-mesh-for-on-demand-separation-of-oil-water-mixtures-and-catalytic-reduction-of-aromatic-dyes
#2
Sun Yihan, Liu Mingming, Zhiguang Guo
Herein, a catalytic mesh with unique wettability, high oil-water separation efficiency and excellent catalytic performance towards aromatic dyes was fabricated. Polypyrrole (PPy) was firstly pre-coated on pristine stainless-steel mesh (SSM) surface via cyclic voltammetry approach. Subsequently, a simple electrodeposition process was performed to prepare and anchor Ag nanoparticles (AgNPs) onto the PPy-coated SSM surface. The PPy-coated mesh with anchored AgNPs was denoted as PPy/AgNPs-coated SSM. The obtained PPy/AgNPs-coated SSM exhibited dual superlyophobic properties and were able to achieve on-demand separation to deal with various of light oil (ρoil  < ρwater ) and heavy oil (ρoil  > ρwater )-water mixtures...
May 19, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793172/on-the-autonomous-motion-of-active-drops-or-bubbles
#3
Yuri S Ryazantsev, Manuel G Velarde, Eduardo Guzman, Ramón G Rubio, Francisco Ortega, Juan-Jose Montoya
Thermo-capillary stresses on the surface of a drop can be the result of a non-isothermal surface chemical conversion of a reactant dissolved in the host fluid. The strength of heat production (with e.g. absorption) on the surface is ruled by the diffusion of the reactant and depends on the state of motion of the drop. Such thermo-capillary stresses can provoke the motion of the drop or its motionless state in the presence of an external body force. If in the balance of forces, including indeed viscous drag, the net resultant force vanishes there is the possibility of autonomous motion with constant velocity of the drop...
May 19, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29783142/assessment-of-microbial-products-in-the-biosorption-process-of-cu-ii-onto-aerobic-granular-sludge-extracellular-polymeric-substances-contribution-and-soluble-microbial-products-release
#4
Linxian Huang, Meilin Li, Guangchao Si, Jinglin Wei, Huu Hao Ngo, Wenshan Guo, Weiying Xu, Bin Du, Qin Wei, Dong Wei
In the present study, the responses of microbial products in the biosorption process of Cu(II) onto aerobic granular sludge were evaluated by using batch and spectroscopic approaches. Batch experimental data showed that extracellular polymeric substances (EPSs) contributed to Cu(II) removal from an aqueous solution, especially when treating low metal concentrations, whereas soluble microbial products (SMPs) were released under the metal stress during biosorption process. A three-dimensional excitation-emission matrix (3D-EEM) identified four main fluorescence peaks in the EPS, i...
May 18, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793169/spontaneous-rise-in-open-rectangular-channels-under-gravity
#5
Vignesh Thammanna Gurumurthy, Ilia V Roisman, Cameron Tropea, Stephen Garoff
Fluid movement in microfluidic devices, porous media, and textured surfaces involves coupled flows over the faces and corners of the media. Spontaneous wetting of simple grooved surfaces provides a model system to probe these flows. This numerical study investigates the spontaneous rise of a liquid in an array of open rectangular channels under gravity, using the Volume-of-Fluid method with adaptive mesh refinement. The rise is characterized by the meniscus height at the channel center, outer face and the interior and exterior corners...
May 17, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29783143/metallic-nanocatalysts-for-electrochemical-co-2-reduction-in-aqueous-solutions
#6
Yuanxing Wang, Cailing Niu, Dunwei Wang
How to effectively and efficiently reduce carbon dioxide (CO2 ) to value-added chemicals represent a frontier in catalysis research. Due to the high activation energy needs and the endothermic nature of CO2 reduction, the reactions are difficult to carry out. When H2 O is present, hydrogen evolution reactions (HER) often compete favorably with CO2 reduction reactions. For these reactions, catalysts are of critical importance to CO2 reduction. In this article, we review the various metal nanocatalysts for electrochemical CO2 reduction (ECR) reactions...
May 16, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777974/stable-photoluminescence-of-lanthanide-complexes-in-aqueous-media-through-metal-organic-frameworks-nanoparticles-with-plugged-surface
#7
Feng Chen, Liucan Wang, Yuxin Xing, Jixi Zhang
The photoluminescence stability of lanthanide complex in aqueous media is a prerequisite for diagnostics probes. The combination of building blocks working in concert to facilitate host-guest structures is now considered state of the art in surpassing this roadblock, yet there still remains a tremendous challenge. Here, a stable, highly-luminescent system was developed through trapping anionic complexes sensitized by tridentate pyridine-tetrazolate (pytz) ligands within the rigid framework of ZIF-8 (zeolitic imidazolate framework-8) particles (∼60 nm in size)...
May 16, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29787950/macroporous-silica-nanoparticles-for-delivering-bcl2-function-converting-peptide-to-treat-multidrug-resistant-cancer-cells
#8
Weixia Xu, Pengjin Ge, Boning Niu, Xiaokun Zhang, Jie Liu, Jingjing Xie
The abundance of B cell lymphoma gene 2 (Bcl-2) is closely correlated with the resistance of cancer cells to chemotherapeutic agents, and a peptide derived from orphan nuclear receptor Nur77 can convert Bcl-2 from a protector to a killer of cancer cells. However, successful application of the Bcl-2-converting peptide to treat drug-resistant cancer cells depends on an efficient delivery carrier. Mesoporous silica nanoparticles (MSNs) have been extensively studied as promising candidates for small molecule drug delivery...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29787947/supramolecular-proteinaceous-biofilms-as-trapping-sponges-for-biologic-water-treatment-and-durable-catalysis
#9
Xiaochen Wu, Xiangsheng Han, Lili Lv, Mingjie Li, Jun You, Chaoxu Li
Inspired by the bacterial biofilms and chorions of living organisms which are made by proteinaceous assemblies and functional for multi-applications, various artificial protein fibrils-based nanoporous films are developed, and show their potential applications in multiple fields. Here, a simple and environmental friendly method was identified to produce bovine serum albumin (BSA) nanofibrils based biofilms, through a combination of protein fibrillation and reverse dialysis. BSA nanofibrils formed biofilms through intermolecular interactions, the resultant biofilms showed tunable thickness by altering the initial protein amount, good stability in organic and salty solvents, transparency and fluorescence properties, hold high capacity of trapping different substances (e...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29783141/graphene-oxide-and-carbon-nanodots-co-modified-biobr-nanocomposites-with-enhanced-photocatalytic-4-chlorophenol-degradation-and-mechanism-insight
#10
Songying Qu, Yuhan Xiong, Jun Zhang
Non-metallic graphene oxide (GO) and carbon nanodots (CDots) co-doped BiOBr ternary system (GO/CDots/BiOBr) were successfully synthesized via a simple one-step solvothermal process. The compositional characterization, optical and electrical properties of photocatalysts were investigated in detail. The prepared ternary photocatalysts possessed the excellent visible-light driven photocatalytic 4-chlorophenol (4-CP) degradation. Additionally, the 4-CP removal efficiencies decreased in the order of GO/CDots/BiOBr (88...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29775819/facile-synthesis-of-yolk-shell-structured-monodisperse-mesoporous-organosilica-nanoparticles-by-a-mild-alkalescent-etching-approach
#11
Jun Tao, Meng Dang, Xiaodan Su, Qing Hao, Junjie Zhang, Xiaobo Ma, Guangming Lu, Yunlei Zhang, Ying Tian, Lixing Weng, Zhaogang Teng, Lianhui Wang
In the work, yolk-shell structured mesoporous organosilica nanoparticles (YSMONs) are successfully prepared by a mild alkalescent etching approach. The method is very convenient, in which mesostructured organosilica nanospheres are directly transformed into yolk-shell structures after etching with mild alkalescent solution (e.g. sodium carbonate solution). The prepared YSMONs have ethane-bridged frameworks, a monodisperse diameter (320 nm), a large pore volume (1.0 cm3  g-1 ), a uniform mesopore (2.4 nm) and a high surface area (1327 m2  g-1 )...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29775817/janus-graphene-oxide-nanosheet-a-promising-additive-for-enhancement-of-polymeric-membranes-performance-prepared-via-phase-inversion
#12
Mahdi Akbari, Mojtaba Shariaty-Niassar, Takeshi Matsuura, Ahmad Fauzi Ismail
Although polymeric membranes find important role in water and waste water treatment in recent years, their fouling is still an important problem. Application of hydrophilic nanoparticles (NPs) is one of the proposed methods for reducing fouling of membranes but their dispersion and stability in hydrophobic polymer matrix is challenging. In this study Janus functionalization of the NPs was introduced as a promising technique toward achieving this goal. Polysulfone (PSf) membranes containing various concentrations of graphene oxide (GO) nanosheets and Janus graphene oxide (Janus GO) nanosheets (as additives) were fabricated via phase inversion...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793170/effective-size-selection-of-mos-2-nanosheets-by-a-novel-liquid-cascade-centrifugation-influences-of-the-flakes-dimensions-on-electrochemical-and-photoelectrochemical-applications
#13
Marzieh Kajbafvala, Mansoor Farbod
Although liquid phase exfoliation is a powerful method to produce MoS2 nanosheets in large scale, but its effectiveness is limited by the diversity of produced nanosheets sizes. Here a novel approach for separation of MoS2 flakes having various lateral sizes and thicknesses based on the cascaded centrifugation has been introduced. This method involves a pre-separation step which is performed through low-speed centrifugation to avoid the deposition of large area single and few-layers by the heavier particles...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29787948/preparation-and-application-of-a-molecular-capture-for-safety-detection-of-cosmetics-based-on-surface-imprinting-and-multi-walled-carbon-nanotubes
#14
Fang Wang, Xiaoyan Li, Junjie Li, Chen Zhu, Min Liu, Zongyuan Wu, Li Liu, Xuecai Tan, Fuhou Lei
A novel composite material for prednisone molecular capture (PS-MC) was prepared by surface imprinting technique in combination with a polyethylene filter plate coated with multi-walled carbon nanotubes for the first time. PS-MC was achieved by using prednisone as the template molecule, 3-aminopropyltriethoxysilane as the monomer, and tetraethoxysilane as the cross-linker. The structure, morphology, and thermal stability of the prepared PS-MC were studied by fourier-transform infrared spectrometry, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29775818/carbon-aerogel-based-supercapacitors-modified-by-hummers-oxidation-method
#15
Yuelong Xu, Bin Ren, Shasha Wang, Lihui Zhang, Zhenfa Liu
Carbon aerogels of an inter-connected three-dimensional (3D) structure are a potential carbon material for supercapacitors. We report a new oxidation modification method to prepare a series of modified carbon aerogels (OM-CA) by Hummers oxidation method. Oxidation-modified carbon aerogels (OM-CA) are obtained from carbon aerogel powders oxidized by Hummers method. Sulfuric acid stoichiometry is studied in order to investigate the effect of the surface oxygen group on surface area and electrochemical performance...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29772415/highly-efficient-polymer-supported-monodisperse-ruthenium-nickel-nanocomposites-for-dehydrocoupling-of-dimethylamine-borane
#16
Betul Sen, Esra Kuyuldar, Buse Demirkan, Tugba Onal Okyay, Aysun Şavk, Fatih Sen
In the present study, highly effective and reusable monodisperse ruthenium-nickel (Ru-Ni) nanomaterials supported on poly(N-vinyl-2-pyrrolidone) (Ru-Ni@PVP) were synthesized (3.51 ± 0.38 nm) by a facile sodium-hydroxide-assisted reduction method; Ru and Ni reduction in PVP solution was accomplished. The prepared nanocomposites were characterized by TEM, HRTEM, XRD, and XPS and performed as a catalyst for dehydrocoupling of dimethylamine-borane (DMAB). It was found that Ru-Ni nanomaterials are one of the most active catalysts at low concentrations and temperature for dehydrocoupling of DMAB...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777973/preparation-of-amine-functionalized-reduced-graphene-oxide-methyl-diethanolamine-nanofluid-and-its-application-for-improving-the-co-2-and-h-2-s-absorption
#17
Vahid Irani, Ahmad Tavasoli, Mehdi Vahidi
A novel approach was examined by addition of amine-modified reduced graphene oxide (rGO) to amine solutions in order to enhance the CO2 absorption capacity of amine solutions. Amine functionalized reduced graphene oxide (rGO)/methyl diethanolamine (MDEA) nanofluid was prepared for absorption of acid gases (CO2 , H2 S). GO was synthesized via a modified hummer method and functionalized through solvothermal method. As-synthesized NH2 -rGO was characterized by XRD, BET, SEM, FTIR, EDX and XPS analysis to determine the structure...
May 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777972/adsorption-kinetics-of-heptadecafluoro-1-nonanol-phase-transition-and-mixed-control
#18
Alvin Casandra, Boris A Noskov, Min-Yu Hu, Shi-Yow Lin
HYPOTHESIS: The adsorption kinetics of heptadecafluoro-1-nonanol (C9 H2 F17 OH) onto a clean air-water interface at low surfactant concentrations (equilibrium surface tension, γ(C) > 65 mN/m) has been reported, and the controlling mechanism was found to be mixed diffusive-kinetic controlled (Kuo et al., JCIS 402 (2013) 131). However, it remains to be determined what the adsorption kinetics are at higher concentrations. Hence, the dynamic surface tension, γ(t) of C9 H2 F17 OH was measured and compared with the theoretical γ(t) curves predicted from phase transition model...
May 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29775816/understanding-the-role-of-hydrogen-bonding-in-the-aggregation-of-fumed-silica-particles-in-triglyceride-solvents
#19
Catherine P Whitby, Melinda Krebsz, Samuel J Booty
HYPOTHESIS: Fumed silica particles are thought to thicken organic solvents into gels by aggregating to form networks. Hydrogen bonding between silanol groups on different particle surfaces causes the aggregation. The gel structure and hence flow behaviour is altered by varying the proportion of silanol groups on the particle surfaces. However, characterising the gel using rheology measurements alone is not sufficient to optimise the aggregation. We have used confocal microscopy to characterise the changes in the network microstructure caused by altering the particle surface chemistry...
May 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29763822/construction-of-novel-sr-0-4-h-1-2-nb-2-o-6-%C3%A2-h-2-o-g-c-3-n-4-heterojunction-with-enhanced-visible-light-photocatalytic-activity-for-hydrogen-evolution
#20
Wanxia Ma, Di Li, Baowei Wen, Xiaodong Ma, Deli Jiang, Min Chen
Construction of heterojunction is an effective strategy to conquer the severe charge carrier recombination limitation of single component g-C3 N4 photocatalyst. In the present work, novel heterojunctions composed of g-C3 N4 nanosheets and Sr0.4 H1.2 Nb2 O6 ·H2 O nanooctahedrons were constructed via a simple hydrothermal method. The as-prepared Sr0.4 H1.2 Nb2 O6 ·H2 O/g-C3 N4 (HSN/CN) heterojunction showed high photocatalytic activity in the water splitting reactions. Specially, it is found that the developed 20 wt%-HSN/CN heterojunction shows high water splitting activity with H2 evolution rate up to 469...
May 12, 2018: Journal of Colloid and Interface Science
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