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Journal of Colloid and Interface Science

Wenbo Sun, Xinyong Li, Jincheng Mu, Shiying Fan, Zhifan Yin, Xinyang Wang, Meichun Qin, Moses Tadé, Shaomin Liu
A series of MnCeZrOx mixed oxide catalysts were facilely synthesized using the impregnation-NH3 ·H2 O coprecipitation method and tested for selective catalytic reduction (SCR) of NO with NH3 . Doping manganese significantly improved the catalytic activity and the best performing SCR catalyst, Mn0.25 Ce0.5 Zr0.25 Ox , was shown to achieve NO conversion > 80% in the temperature range (60-350 °C), with the denitration effect up to 50% at room temperature (conditions: [NO] = [NH3 ] = 500 ppm, [O2 ] = 5 vol%, He as balance, flow rate  =  100 mL/min, GHSV  =  40, 000 h-1 )...
July 16, 2018: Journal of Colloid and Interface Science
Shuwen Gao, Yanwei Sui, Fuxiang Wei, Jiqiu Qi, Qingkun Meng, Yaojian Ren, Yezeng He
Metal-organic frameworks (MOFs), serving as a promising electrode material in the supercapacitors, have attracted tremendous interests in recent years. Here, through modifying the molar ratio of the Ni2+ and Co2+ , we have successfully fabricated Ni-MOF and Ni/Co-MOF by a facile hydrothermal method. The Ni/Co-MOF with a dandelion-like hollow structure shows an excellent specific capacitance of 758 F g-1 at 1 A g-1 in the three-electrode system. Comparing with Ni-MOF, the obtained Ni/Co-MOF has a better rate capacitance (89% retention at 10 A g-1 ) and cycling life (75% retention after 5000 circulations)...
July 16, 2018: Journal of Colloid and Interface Science
Yiqun Zhang, Linsheng Zhou, Yueying Liu, Deye Liu, Fengmin Liu, Fangmeng Liu, Xu Yan, Xishuang Liang, Yuan Gao, Geyu Lu
Mulberry-shaped tin oxide (SnO2 ) hierarchical architectures and samarium oxide (Sm2 O3 ) loaded tin oxide with different amounts (0.5, 1, 2.5, and 4 mol% Sm2 O3 ) were successfully synthesized by facile hydrothermal synthesis method and simple isometric impregnation method. The gas sensing performance of the sensors based on pure SnO2 and Sm2 O3 loaded SnO2 materials were systematically investigated. The results indicated that Sm2 O3 loading considerably affected the improvement of the sensing performance of the SnO2 sensor...
July 16, 2018: Journal of Colloid and Interface Science
Li Xie, Yu Liu, Hongye Bai, Chunxiang Li, Baodong Mao, Lin Sun, Weidong Shi
One of the most effective tactics to promote the electrochemical performance of supercapacitors is to design and synthesize hybrid binder-free electrodes with core-shell structures. In this work, hierarchical ZnCo2 O4 @ZnWO4 core-shell nanowire arrays grown on nickel foam are successfully fabricated via a facile two-step hydrothermal route and subsequent thermal treatment. The ZnCo2 O4 nanowire arrays supported on nickel foam serve as the backbone for anchoring ZnWO4 nanosheets. When tested as binder-free electrodes for supercapacitors, the as-prepared ZnCo2 O4 @ZnWO4 hybrid electrode exhibits an ultrahigh specific areal capacitance of 13...
July 16, 2018: Journal of Colloid and Interface Science
Yuanyuan Zhang, Lili Wang, Xiumei Ma, Manli Yang, Haiyan Jiang, Lin Li, Chuancong Yuan, Jinsheng Shi
Carbon quantum dots (CQDs) were considered as desirable up-conversion luminescent materials. However, the reason leading to their up-conversion luminescence was not clear. In this paper, CQDs decorated ZnSn(OH)6 was successfully synthesized by facile in situ hydrothermal method. Under NIR light irradiation, ciprofloxacin degradation efficiency of sample was 37.4%. Subsequently, reasons for the up-conversion effect of CQDs were investigated to some extent. An amorphous carbon layer around CQDs was observed in composite (ZnSn(OH)6 @CQDs@C) by HR-TEM and elemental mapping images...
July 16, 2018: Journal of Colloid and Interface Science
Haiguang Zhu, Dongyun Chen, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu
The application of visible light-induced photocatalysts for photocatalytic pollution mitigation has become a promising strategy due to the inexhaustible solar energy. And how to improve pollutants degradation rate is still a meaningful work. Many researchers dealt with this issue by enhancing visible light absorption of photocatalysts. However, few studies focus on this issue by improving semiconductor's absorption property of organic pollutants. Hence, in this work, we prepared the Ag/AgCl foam coated per-6-thio-β-cyclodextrin (SH-β-CD) to improve the photocatalytic activity of Ag/AgCl foam...
July 14, 2018: Journal of Colloid and Interface Science
Yilin Wu, Li Chen, Tongfan Hao, Jian Lu, Jia Gao, Xinyu Lin, Jiuyun Cui, Chunxiang Li, Yongsheng Yan
A tremendous effort has been made for the synthesis and multifunction of environmentally responsive and selective separation membranes. With the bioinspired design of polydopamine (pDA)-assisted inorganic film, we proposed a simple, yet efficient, thermo-responsive cell culture substrate. Herein, a Ag/TiO2 /pDA-based nanocomposite structure was initially obtained, and the ciprofloxacin-imprinted membranes (MINCMs) with thermo-responsive recognition sites were then synthesized by using NIPAm as backbone monomer...
July 11, 2018: Journal of Colloid and Interface Science
Fang Pan, Zongyi Li, Haoning Gong, Jordan T Petkov, Jian R Lu
Surfactants are multifunctional molecules widely used in personal care and healthcare formulations to cleanse, help disperse active ingredients (e.g., forming emulsions) and stabilise products. With increasing demands on improving biosafety, there is now mounting pressure to understand how different surfactants elicit toxicities at molecular and cellular levels. This work reports the membrane-lytic behaviour of a group of sulphonated methyl ester (SME) surfactants together with representative conventional surfactants...
July 10, 2018: Journal of Colloid and Interface Science
Na Wang, Ming Cai, Xue Yang, Yuyan Yang
Airborne particulate matter (PM) pollution has become a serious threat to human health, thus it is highly desired for a high-filtration-performance and good-wearing-comfort face mask. Herein, a highly breathable and thermal comfort filter medium consisting of electret polyethersulfone/barium titanate nanofibrous membrane (PES/BaTiO3 NFM) integrated on a nonwoven polypropylene substrate was developed. Benefiting from the high porosity and optimized injection charge energy, the PES/BaTiO3 membrane was endowed with a good air permeability of 743 mm s-1 , a modest water vapor permeability of 6...
July 10, 2018: Journal of Colloid and Interface Science
Haoyang Fu, Yixuan Yang, Runliang Zhu, Jing Liu, Muhammad Usman, Qingze Chen, Hongping He
Present study reports the successful development of a novel lanthanum (La)-based magnetic adsorbent and its use for phosphate removal from water. For its synthesis, natural magnetite (Mag), Fe3 O4 , was subjected to partial dissolution in HCl solution and the obtained suspension was mixed with an alkaline solution for in-situ synthesis of ferrihydrite (Fh)-coated Mag (Mag@Fh). Mag@Fh was then decorated with La (hydr)oxides followed by calcination to produce Fh-coated and La-decorated Mag (Mag@Fh-La). Obtained Mag@Fh-La represented high phosphate adsorption capacity (44...
July 9, 2018: Journal of Colloid and Interface Science
Soheila Asadzadeh-Khaneghah, Aziz Habibi-Yangjeh, Kazuya Nakata
The aim of this work is the fabrication of very efficient visible-light-driven photocatalysts through anchoring carbon dots and BiOBr over nanosheets of graphitic carbon nitride. Hence, a series of g-C3 N4 nanosheets/Carbon dots/BiOBr (denoted as CNNS/CDs/BiOBr) nanocomposites with different amounts of BiOBr were synthesized by refluxing route. The resultant photocatalysts were characterized by XRD, EDX, SEM, TEM, HRTEM, AFM, XPS, FT-IR, UV-vis DRS, TGA, BET, and PL instruments. Among the photocatalysts, the CNNS/CDs/BiOBr (20%) nanocomposite exhibited the highest photocatalytic performance for degradations of RhB, MB, and MO under visible light, which is about 129, 29...
July 9, 2018: Journal of Colloid and Interface Science
Christopher Hill, Adam Czajka, Gavin Hazell, Isabelle Grillo, Sarah E Rogers, Maximilian W A Skoda, Nigel Joslin, John Payne, Julian Eastoe
HYPOTHESIS: Reports on the colloidal and interfacial properties of fluorocarbon (FC) surfactants used in fire-fighting foam formulations are rare. This is primarily because these formulations are complex mixtures of different hydrocarbon (HC) and fluorocarbon (FC) surfactants. By developing a greater understanding of the individual properties of these commercial FC surfactants, links can be made between structure and respective surface/ bulk behaviour. Improved understanding of structure property relationships of FC surfactants will therefore facilitate the design of more environmentally responsible surfactant replacements...
July 7, 2018: Journal of Colloid and Interface Science
Jinsong He, Anan Cui, Fan Ni, Shihuai Deng, Fei Shen, Gang Yang
3D macrostructure adsorbents have attracted great attention in water treatment recently. A series of novel 3D yttrium-based graphene oxide-sodium alginate hydrogels were prepared by sol-gel process for removal of fluoride. The hydrogels displayed a 3D network porous and amorphous structure composed of 2D sheets, with the uniform dispersion of Y(III) onto the gels. The hydrogel Y-GO-SA1.0 was selected as the optimized adsorbent for the fluoride removal due to its best adsorption performance. The adsorption experiments revealed that the maximum adsorption of fluoride occurred at pH 4...
July 6, 2018: Journal of Colloid and Interface Science
Dongya Li, Shiyu Zuo, Haiming Xu, Jie Zan, Lei Sun, Donghui Han, Wei Liao, Binyang Zhang, Dongsheng Xia
A g-C3 N4 -Cu2 O was successfully synthesized in the presence of PEG-400 surfactant via a hydrothermal method and high-temperature calcination method. Based on the results of TEM, XPS, EPR, and other techniques, it was verified that a heterojunction was formed. The synthesized g-C3 N4 -Cu2 O show excellent photocatalytic activity and stability was confirmed through cycling experiments, XRD and XPS. At a suitable addition amount, the value of band gap of g-C3 N4 -Cu2 O is reduced to 1.87 eV, the PL intensity decreases effectively, the specific surface area is increased to 12...
July 6, 2018: Journal of Colloid and Interface Science
Lulu Zhang, Peng Chen, Jiliang Wang, Hongfeng Li, Wenbin Sun, Pengfei Yan
New insight of introducing new organic compounds for the efficient photogenerated charge separation is vitally important for the current solar energy conversion. Herein, (2Z,2'Z)-4,4'-(anthracene-2,6-diylbis(azanediyl))bis(4-oxobut-2-enoic acid) (ADA)/TiO2 composite thin film is fabricated through the wet-impregnation strategy, which exhibits excellent photoelectrochemical performance (PEC). A combined study of ultraviolet-visible absorption spectra, scanning Kelvin probe maps, electrochemical and photoelectrochemical measurements reveals that the ADA/TiO2 composite with narrow bandgap of 2...
July 6, 2018: Journal of Colloid and Interface Science
Ananyo Jyoti Misra, Sourav Das, A P Habeeb Rahman, Bhaskar Das, R Jayabalan, Susanta Kumar Behera, Mrutyunjay Suar, Ashok J Tamhankar, Amrita Mishra, Cecilia Stålsby Lundborg, Suraj K Tripathy
Water contamination by multidrug resistant (MDR) enteric bacteria can be considered as the foremost cause of gastrointestinal infections and poses a threat to global public health. Therefore, there is an urgent need to pursue unorthodox techniques with potential of community scale applications for purging of water borne pathogenic bacteria. We communicate visible-light assisted photocatalytic disinfection (PCD) of an enteric MDR bacterium; Enterobacter sp. using Fe-doped ZnO nanoparticles impregnated on Kaolinite (Clay) (ZnO/K)...
July 6, 2018: Journal of Colloid and Interface Science
Jietao Jiang, Kai Zhu, Yongzheng Fang, Huizhong Wang, Ke Ye, Jun Yan, Guiling Wang, Kui Cheng, Liming Zhou, Dianxue Cao
Architecture of electrode materials plays an important role in achieving favorable electrochemical performance via providing fast electronic transport pathway and shorten lithium ion diffusion distance. Herein, ultrafine CoP nanoparticles were successfully embedded in carbon nanorod, which were grown on the biomass-derived carbon (BC). When applied as anode materials for lithium-ion batteries, these CoP@C/BC displayed capable specific capacity, remarkable rate ability and outstanding long-term cycling performance...
July 6, 2018: Journal of Colloid and Interface Science
A S Dogonchi, S M Seyyedi, M Hashemi-Tilehnoee, D D Ganji
In this work, transient movement of a vertically falling soluble spherical particle in a non-Newtonian medium is perused. It is supposed that the particle mass diminishes owing to its solubility in the fluid, and thus particle size will be diminished by a linear function. The governing nonlinear differential equation is solved analytically using Collocation Method (CM). The impacts of the effective parameters of this study are examined on the velocity and acceleration. Further, the positions of the particle are portrayed graphically at every 1 s time trend...
July 5, 2018: Journal of Colloid and Interface Science
Jason Timmons, Gabriel Falzone, Magdalena Balonis, Mathieu Bauchy, Gaurav Sant
HYPOTHESIS: In suspensions, the activation energy of viscous flow is an important property that controls the temperature dependence of the viscosity. However, the differentiated roles of the properties of the liquid phase and the structure of the solid particles in controlling the activation energy remain unclear. We propose here that particle fractal structuring yields an anomalous behavior in the activation energy of viscous flow. EXPERIMENTS: The rheology of two series of suspensions consisting of glass beads suspended in poly(1-decene) was investigated over a wide range of solid volume fractions (0...
July 4, 2018: Journal of Colloid and Interface Science
Yu Liu, Chen Wang, Jean-Pierre Veder, Martin Saunders, Moses Tade, Shaobin Wang, Zongping Shao
Unreliable energy supply and environmental pollution are two major concerns of the human society in this century. Herein, we report a rational approach on preparation of hierarchically-structured cobalt-carbon composites with tunable properties for a number of applications. A facile hydrothermal treatment of cobalt nitrate and sucrose results in the formation of a metallic cobalt-amorphous carbon composite with cobalt nanospheres anchored homogenously on an amorphous carbon substrate. Tuning the calcination conditions in air will generate either a metallic cobalt-cobalt oxide core-shell structure with magnetism or a fully oxidized Co3 O4 composite...
July 4, 2018: Journal of Colloid and Interface Science
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