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Journal of Colloid and Interface Science

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https://www.readbyqxmd.com/read/28088569/design-of-%C3%AE-cyclodextrin-modified-tio2-nanotubes-for-the-adsorption-of-cu-ii-isotherms-and-kinetics-study
#1
Mohamed Triki, Haythem Tanazefti, Hafedh Kochkar
This paper builds on previous literature showing the interesting adsorptive properties of TiO2 nanotubes. It further explores the positive effect of β-cyclodextrin on these properties. Hence, β-cyclodextrin modified TiO2 nanotubes were successfully prepared and characterized by XRD, N2 physisorption at 77K, Raman, FTIR-ATR, (1)H NMR, TEM and EPR. The adsorptive interaction of Cu(II) with materials was investigated in aqueous solution at pH 9.25 (NH4(+)/NH3). The main conclusion is that copper(II)-ammonia complexation equilibria play an important role in the adsorption process...
January 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088568/nanostructured-tin-oxide-films-physical-synthesis-characterization-and-gas-sensing-properties
#2
S M Ingole, S T Navale, Y H Navale, D K Bandgar, F J Stadler, R S Mane, N S Ramgir, S K Gupta, D K Aswal, V B Patil
Nanostructured tin oxide (SnO2) films are synthesized using physical method i.e. thermal evaporation and are further characterized with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy measurement techniques for confirming its structure and morphology. The chemiresistive properties of SnO2 films are studied towards different oxidizing and reducing gases where these films have demonstrated considerable selectivity towards oxidizing nitrogen dioxide (NO2) gas with a maximum response of 403% to 100ppm @200°C, and fast response and recovery times of 4s and 210s, respectively, than other test gases...
January 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088566/removal-of-salicylic-acid-as-an-emerging-contaminant-by-a-polar-nano-dendritic-adsorbent-from-aqueous-media
#3
M Arshadi, F Mousavinia, M K Abdolmaleki, M J Amiri, A Khalafi-Nezhad
A polar nano-dendritic adsorbent containing amine groups (SAPAMAA) was synthesized onto the nanoparticles of SiO2Al2O3 and its uptake of salicylic acid (SA) from the synthetic and real water was investigated. The synthesized nanomaterials were fully studied by nuclear magnetic resonance spectrum ((1)H NMR and (13)C NMR), Fourier transform infrared spectroscopy (FT-IR), zeta potential (ζ), inductively coupled plasma atomic emission spectroscopy (ICP-AES), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and elemental analysis...
January 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088565/rapid-microwave-assisted-growth-of-silver-nanoparticles-on-3d-graphene-networks-for-supercapacitor-application
#4
S Khamlich, T Khamliche, M S Dhlamini, M Khenfouch, B M Mothudi, M Maaza
Silver nanoparticles (AgNPs) grown on a three dimensional (3d) graphene networks (GNs) has been successfully prepared by an efficient and rapid microwave-assisted growth process to form GNs/AgNPs nanocomposite electrode materials for supercapacitor application. The 3d nature of the used GNs offers a unique architecture, which creates an efficient conduction networks and maximum utilization of space and interface, and acts as a conductive layer for the deposited AgNPs. The electrochemical performances of the fabricated electrode were evaluated by cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) tests...
January 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088117/adsorption-of-phosphate-from-aqueous-solution-using-iron-zirconium-modified-activated-carbon-nanofiber-performance-and-mechanism
#5
Weiping Xiong, Jing Tong, Zhaohui Yang, Guangming Zeng, Yaoyu Zhou, Dongbo Wang, Peipei Song, Rui Xu, Chen Zhang, Min Cheng
Phosphate (P) removal is significant for the prevention of eutrophication in natural waters. In this paper, a novel adsorbent for the removal of P from aqueous solution was synthesized by loading zirconium oxide and iron oxide onto activated carbon nanofiber (ACF-ZrFe) simultaneously. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results showed that P adsorption was highly pH dependent and the optimum pH was found to be 4...
January 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088116/upconversion-color-tuning-in-ce-3-doped-liyf4-yb-3-ho-3-liyf4-nanoparticles-towards-ratiometric-fluorescence-detection-of-chromium-iii
#6
Shijiang Liu, Yangjie Li, Cheng Zhang, Liang Yang, Tingting Zhao, Ruilong Zhang, Changlong Jiang
Ratiometric fluorescence sensor exhibits advantages of sensitive response, high anti-interference ability and naked eye visualization owing to multiple independent emission peaks utilized for results analysis. To achieve such multi-emission probe, the traditional methods have involved simple mixing of two emitters or tedious synthesis processes of hybrid material. However, these probes often have problems of inconstant emission strength ratio, low light-stability, and complicated synthetic process, which limit their applications in practical field...
January 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088564/doping-and-vacancy-effects-of-graphyne-on-so2-adsorption
#7
Sunkyung Kim, Jin Yong Lee
The adsorption of sulfur dioxide (SO2) on pristine and modified graphyne (including boron- or nitrogen- doping and introducing a single carbon atom defect) was investigated by density functional theory calculations. The structural, electronic, and magnetic properties of graphyne were changed according to the dopant atom site of doping and vacancy. SO2 adsorption was obviously affected by modification of graphyne. SO2 weakly interacted with pristine and nitrogen-doped graphynes. Boron doping at the sp-hybridized carbon site and introducing a single carbon atom vacancy in graphyne brought about a dramatic enhancement in SO2 adsorption...
January 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088562/the-effect-of-high-temperature-sol-gel-polymerization-parameters-on-the-microstructure-and-properties-of-hydrophobic-phenol-formaldehyde-silica-hybrid-aerogels
#8
Mohamad Mehdi Seraji, Ghasem Sameri, Jamal Davarpanah, Ahmad Reza Bahramian
Phenol-formaldehyde/silica hybrid aerogels with different degree of hydrophobicity were successfully synthesized via high temperature sol-gel polymerization. Tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were used as precursor and co-precursor of the hydrophobic silica-based phase, respectively. The hydrolysis step of silica based sols were conducted by acid catalyzed reactions and HCl was used as hydrolysis catalyst. The chemical structure of prepared hybrid aerogels was characterized by Fourier Transform Infrared spectroscopy (FT-IR)...
January 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088570/achillea-millefolium-l-extract-mediated-green-synthesis-of-waste-peach-kernel-shell-supported-silver-nanoparticles-application-of-the-nanoparticles-for-catalytic-reduction-of-a-variety-of-dyes-in-water
#9
Bahar Khodadadi, Maryam Bordbar, Mahmoud Nasrollahzadeh
In this paper, silver nanoparticles (Ag NPs) are synthesized using Achillea millefolium L. extract as reducing and stabilizing agents and peach kernel shell as an environmentally benign support. FT-IR spectroscopy, UV-Vis spectroscopy, X-ray Diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDS), Thermo gravimetric-differential thermal analysis (TG-DTA) and Transmission Electron Microscopy (TEM) were used to characterize peach kernel shell, Ag NPs, and Ag NPs/peach kernel shell...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088567/simple-fabrication-of-zeolitic-imidazolate-framework-zif-8-polymer-composite-beads-by-phase-inversion-method-for-efficient-oil-sorption
#10
Zahra Abbasi, Ezzatollah Shamsaei, Xi-Ya Fang, Bradley Ladewig, Huanting Wang
Zeolitic imidazolate framework ZIF-8 beads of 2-3mm in diameter were prepared using a simple one-step phase inversion method. The beads were fabricated by different amounts of ZIF-8 to polyether sulfone (PES) ratios. ZIF-8 played the role of an adsorbent while PES acted as a binder in the composite matrix to keep the ZIF-8 particles. Since ZIF-8 is highly hydrophobic, the beads floated on water and adsorbed oil droplets successfully. This efficient oil adsorption is attributed to the hydrophobicity and high surface area of ZIF-8 particles which can effectively adsorb oil droplets...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088563/a-novel-fabrication-of-a-high-performance-sio2-graphene-oxide-go-nanohybrids-characterization-of-thermal-properties-of-epoxy-nanocomposites-filled-with-sio2-go-nanohybrids
#11
S Z Haeri, B Ramezanzadeh, M Asghari
In this study it has been aimed to enhance the thermal resistance of epoxy coating through incorporation of SiO2-GO nanohybrids. SiO2-GO nanohybrids were synthesized through one-step sol-gel route using a mixture of Tetraethylorthosilane (TEOS) and 3-Aminopropyl triethoxysilane (APTES) silanes. The SiO2-GO nanohybrids were prepared at various hydrolysis times of 24, 48 and 72h. Then 0.2wt.% of GO and SiO2-GO nanohybrids were separately incorporated into the epoxy coating. Results revealed that amino functionalized SiO2 nanoparticles with particle size around 20-30nm successfully synthesized on the basal plane of GO...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088122/a-comparative-study-on-the-effects-of-ultrathin-luminescent-graphene-oxide-quantum-dot-goqd-and-graphene-oxide-go-nanosheets-on-the-interfacial-interactions-and-mechanical-properties-of-an-epoxy-composite
#12
B Karimi, B Ramezanzadeh
The reinforcement effect of graphene oxide nanosheets on the mechanical properties of an epoxy coating has been extensively studied. However, the effect of graphene oxide quantum dot (GOQD) as a new unique carbon based nanomaterial (with lateral dimension of 5-6nm and thickness of one carbon atom) on the mechanical properties of epoxy coating has not been reported and compared with GO yet. So this study aims at fabrication of a high-performance polymer composite with unique mechanical properties using GOQD nanosheets...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088121/synthesis-of-ctab-intercalated-graphene-and-its-application-for-the-adsorption-of-ar265-and-ao7-dyes-from-water
#13
Mohammed Yusuf, Moonis Ali Khan, Marta Otero, E C Abdullah, Masaaki Hosomi, Akihiko Terada, Shohei Riya
Environmental applications of graphene (GN) are limited by the occurrence of aggregation. Herein, graphene oxide (GO) was synthesized, reduced to GN by ascorbic acid, and intercalated with cetyltrimethylammonium bromide (CTAB). GN-CTAB was characterized by Boehm's titration, N2 adsorption/desorption, Fourier transform infrared spectroscopy, Raman spectroscopy, Fluorescence spectrophotometry, X-ray diffraction and Scanning electron microscopy. Then, GN-CTAB was used for the adsorptive removal of acid red 265 (AR265) and acid orange 7 (AO7) dyes from water both under batch and column operation...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088120/3d-architecture-of-a-graphene-comoo4-composite-for-asymmetric-supercapacitors-usable-at-various-temperatures
#14
Yaru Jiang, Xin Zheng, Xiaoqin Yan, Yong Li, Xuan Zhao, Yue Zhang
Designing and optimizing the electrode materials and studying the electrochemical performance or cycle life of the supercapacitor under different working conditions are crucial to its practical application. Herein, we proposed a rational design of 3D-graphene/CoMoO4 nanoplates by a facile two-step hydrothermal method. Owing to the high electron transfer rate of graphene and the high activity of the CoMoO4 nanoplates, the three-dimensional electrode architectures achieved remarkable electrochemical performances with high areal specific capacitance (1255...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088119/composite-films-of-metal-doped-cos-carbon-allotropes-efficient-electrocatalyst-counter-electrodes-for-high-performance-quantum-dot-sensitized-solar-cells
#15
Seyede Sara Khalili, Hossein Dehghani, Malihe Afrooz
This study reports the enhanced catalytic ability of metal ions-doped CoS and CoS/carbon allotrope counter electrodes (CEs) (synthesized using a successive ionic layer adsorption and reaction (SILAR) method) to improve the power conversion efficiency (η) in quantum dot-sensitized solar cells (QDSSCs). Firstly, doping effects of different metal ions (Mg(2+), Ca(2+), Sr(2+) and Ba(2+)) in the CoS CE on the QDSSCs performance have been investigated. Overall, among the different metal doped CoS CEs, the best energy conversion efficiency of 2...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088118/histidine-functionalized-carbon-based-dot-zinc-ii-nanoparticles-as-a-novel-stabilizer-for-pickering-emulsion-synthesis-of-polystyrene-microspheres
#16
Li Ruiyi, Li Zaijun, Liu Junkang
Carbon-based dots (CDs) are nanoparticles with size-dependent optical and electronic properties that have been widely applied in energy-efficient displays and lighting, photovoltaic devices and biological markers. However, conventional CDs are difficult to be used as ideal stabilizer for Pickering emulsion due to its irrational amphiphilic structure. The study designed and synthesized a new histidine-functionalized carbon dot-Zinc(II) nanoparticles, which is termed as His-CD-Zn. The His-CD was made via one-step hydrothermal treatment of histidine and maleic acid...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28086116/relaxometric-property-of-organosilica-nanoparticles-internally-functionalized-with-iron-oxide-and-fluorescent-dye-for-multimodal-imaging
#17
Michihiro Nakamura, Koichiro Hayashi, Hitoshi Kubo, Takafumi Kanadani, Masafumi Harada, Toshinobu Yogo
Multimodal imaging using novel multifunctional nanoparticles provides a new approach for the biomedical field. Thiol-organosilica nanoparticles containing iron oxide magnetic nanoparticles (MNPs) as the core and rhodamine B in the thiol-organosilica layer (thiol OS-MNP/Rho) were synthesized in a one-pot process. The thiol OS-MNP/Rho showed enhanced magnetic resonance imaging (MRI) contrast and high fluorescence intensity. The relaxometry of thiol OS-MNP/Rho revealed a novel coating effect of the organosilica layer to the MNPs...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28086119/the-decisive-effect-of-interface-states-on-the-photocatalytic-activity-of-the-silver-i-oxide-titanium-dioxide-heterojunction
#18
Yanqiang Lei, Xiaoqing Lu
A one-step hydrothermal method was adopted to synthesize the Ag2O/TiO2 nanoheterojunction. Its photocatalytic activity was evaluated by degrading methylene blue (MB) aqueous solution under UV and visible light. The MB degradation results showed that the Ag2O/TiO2 nanoheterojunction enhances the photocatalytic activity under UV irradiation rather than visible light. X-ray photoelectron spectroscopy (XPS) was performed to detect the electronic structure at the interface of Ag2O and TiO2. The XPS results confirmed that the electronic band structure of the nanoheterojunction was determined by the interface states between the Ag2O and TiO2 interface...
January 4, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28081456/robust-tough-and-anti-fatigue-cationic-latex-composite-hydrogels-based-on-dual-physically-cross-linked-networks
#19
Song Gu, Lijie Duan, Xiuyan Ren, Guang Hui Gao
Dual physically cross-linked hydrogels, which are triggered by cationic latexes as hydrophobic association and ionic crosslinking centers, were easily fabricated via a one-pot in situ polymerization method. First, the hydrophobic alkyl chains of hydrophobic monomers are adsorbed on the surface of latex microspheres and stabilized in the presence of surfactants, forming hydrophobic association centers as the first physical crosslinking points. Meanwhile, the anionic sulfate radicals dissociated by persulphate are attracted towards the cationic molecular chains of latex microspheres through ionic interactions, forming the secondary physical crosslinking centers, and initiate the copolymerization between acrylamide and hydrophobic vinyl monomers...
January 4, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088571/theophylline-assisted-eco-friendly-synthesis-of-ptau-nanospheres-at-reduced-graphene-oxide-with-enhanced-catalytic-activity-towards-cr-vi-reduction
#20
Ling-Ya Hu, Li-Xian Chen, Meng-Ting Liu, Ai-Jun Wang, Lan-Ju Wu, Jiu-Ju Feng
Theophylline as a naturally alkaloid is commonly employed to treat asthma and chronic obstructive pulmonary disorder. Herein, a facile theophylline-assisted green approach was firstly developed for synthesis of PtAu nanospheres/reduced graphene oxide (PtAu NSs/rGO), without any surfactant, polymer, or seed involved. The obtained nanocomposites were applied for the catalytic reduction and removal of highly toxic chromium (VI) using formic acid as a model reductant at 50°C, showing the significantly enhanced catalytic activity and improved recyclability when compared with commercial Pt/C (50%) and home-made Au nanocrystals supported rGO (Au NCs/rGO)...
December 31, 2016: Journal of Colloid and Interface Science
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