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https://www.readbyqxmd.com/read/28525881/preparation-of-mesoporous-cs-pom-mof-199-mcm-41-under-two-different-synthetic-methods-for-a-highly-oxidesulfurization-of-dibenzothiophene
#1
Si-Wen Li, Jia-Rong Li, Qi-Ping Jin, Zhi Yang, Rong-Lan Zhang, Rui-Min Gao, Jian-She Zhao
Two different synthetic methods, the direct method and the substitution method, were used to synthesize the Cs-POM@MOF-199@MCM-41 (Cs-PMM), in which the modified heteropolyacid with cesium salt has been encapsulated into the pores with the mixture of MOF and MCM-41. The structural properties of the as-prepared catalysts were characterized using various analytical techniques: powder X-ray diffraction, FT-IR, SEM, TEM, XPS and BET, confirming that the Cs-POM active species retained its Keggin structure after immobilization...
April 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28525392/the-effects-of-structural-properties-on-the-lithium-storage-behavior-of-mesoporous-tio2
#2
Liang Xiao, Wen Meng, Shiyao Wang, Dan Liu, Deyu Qu, Zhizhong Xie, Bohua Deng, Jinping Liu
Understanding the effects of structural properties on the lithium storage behavior of mesoporous TiO2 is crucial for further optimizing its performance through rational structure design. To achieve this, herein, the surface area and the grain size of the prepared mesoporous TiO2 are intentionally adjusted by controlling the calcination temperatures. It is found that the capacities of the mesoporous TiO2 contain both the lithium-ion insertion into the bulk phase (Qin) and the additional surface lithium storage (Qas)...
May 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28525262/serum-protein-adsorption-enhances-active-leukemia-stem-cell-targeting-of-mesoporous-silica-nanoparticles
#3
Michaela Beck, Tamoghna Mandal, Christian Buske, Mika Lindén
The functionalization of nanoparticles with a ligand targeting receptors overexpressed by the target cells is a commonly used strategy when aiming at nanoparticle-based, cell type-specific drug delivery. However, the influence of particle surface chemistry on the targetability has received much less attention. The surface charge is known to directly or indirectly affect the nanoparticle cellular uptake kinetics by influencing serum protein adsorption. Thus, it is fair to assume that both the specificity and cellular uptake kinetics of targeted nanoparticles are influenced by the nanoparticle charge, both of which are important parameters for controlling cell-specific drug delivery efficiency...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28524873/mesoporous-metallic-rhodium-nanoparticles
#4
Bo Jiang, Cuiling Li, Ömer Dag, Hideki Abe, Toshiaki Takei, Tsubasa Imai, Md Shahriar A Hossain, Md Tofazzal Islam, Kathleen Wood, Joel Henzie, Yusuke Yamauchi
Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relatively high surface energy of rhodium (Rh) metal. Here we describe a simple, scalable route to generate mesoporous Rh by chemical reduction on polymeric micelle templates [poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA)]...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28522938/mucin-1-antibody-conjugated-mesoporous-silica-nanoparticles-for-selective-breast-cancer-detection-in-a-mucin-1-transgenic-murine-mouse-model
#5
Didier Dréau, Laura Jeffords Moore, Merlis P Alvarez-Berrios, Mubin Tarannum, Pinku Mukherjee, Juan L Vivero-Escoto
Mucin-1 (MUC1), a transmembrane glycoprotein is aberrantly expressed on ~90% of breast cancer and is an excellent target for nanoparticulate targeted imaging. In this study, the development of a dye-doped NIR emitting mesoporous silica nanoparticles platform conjugated to tumor-specific MUC1 antibody (ab-tMUC1-NIR-MSN) for in vivo optical detection of breast adenocarcinoma tissue is reported. The structural properties, the in vitro and in vivo performance of this nanoparticle-based probe were evaluated. In vitro studies showed that the MSN-based optical imaging nanoprobe is non-cytotoxic and targets efficiently mammary cancer cells overexpressing human tMUC1 protein...
December 2016: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/28521975/facile-synthesis-of-cellulose-based-carbon-with-tunable-n-content-for-potential-supercapacitor-application
#6
Zehong Chen, Xinwen Peng, Xiaoting Zhang, Shuangshuang Jing, Linxin Zhong, Runcang Sun
Producing hierarchical porous N-doped carbon from renewable biomass is an essential and sustainable way for future electrochemical energy storage. Herein we cost-efficiently synthesized N-doped porous carbon from renewable cellulose by using urea as a low-cost N source, without any activation process. The as-prepared N-doped porous carbon (N-doped PC) had a hierarchical porous structure with abundant macropores, mesopores and micropores. The doping N resulted in more disordered structure, and the doping N content in N-doped PC could be easily tunable (0...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28521220/synthesis-of-ordered-mesoporous-la2o3-zro2-composites-with-encapsulated-pt-nps-and-the-effect-of-la-dopping-on-catalytic-activity
#7
Yan Gao, Yiwei Zhang, Yuming Zhou, Chao Zhang, Hongxing Zhang, Shuo Zhao, Jiasheng Fang, Mengqiu Huang, Xiaoli Sheng
In this work, we report a feasible approach to synthesize a ternary nanocomposites, Pt/lanthanum doped mesoporous zirconium oxide (Pt/La2O3-ZrO2), via an effective two-step method. Ordered mesoporous La2O3-ZrO2 composites were firstly fabricated with mesoporous silica KIT-6 as a hard template. Subsequently, uniform Pt nanoparticles encapsulated by 4 hydroxyl-terminated poly (amidoamine) (G4-OH PAMAM) dendrimers were deposited on the La2O3-ZrO2 composites. The as-prepared samples were characterized by transmission electron microscope (TEM), N2 adsorption-desorption isotherm analysis, energy dispersion X-ray analysis (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature programmed reduction (H2-TPR)...
May 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28521161/visible-light-photo-fenton-oxidation-of-phenol-with-rgo-%C3%AE-feooh-supported-on-al-doped-mesoporous-silica-mcm-41-at-neutral-ph-performance-and-optimization-of-the-catalyst
#8
Ying Wang, Mingxing Liang, Jiasheng Fang, Jun Fu, Xiaochun Chen
In this study, α-FeOOH on reduced graphene oxide (rGO-α-FeOOH) supported on an Al-doped MCM-41 catalyst (RFAM) was optimized for the visible-light photo-Fenton oxidation of phenol at neutral pH. The stability of the catalysts, effect of bubbling aeration, and degradation intermediates were investigated. Results indicated that RFAM with a large Brunauer-Emmett-Teller (BET) area and mesoporous structure displayed excellent catalytic activity for the visible-light-driven (VLD) photo-Fenton process. Phenol degradation was well described by a pseudo-first-order reaction kinetics model...
May 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28520529/synthesis-of-theranostic-epithelial-cell-adhesion-molecule-targeted-mesoporous-silica-nanoparticle-with-gold-gatekeeper-for-hepatocellular-carcinoma
#9
Maryam Babaei, Khalil Abnous, Seyed Mohammad Taghdisi, Sara Amel Farzad, Mohammad Taghi Peivandi, Mohammad Ramezani, Mona Alibolandi
AIM: In this study, we report the fabrication of epithelial cell adhesion molecule targeted 5-fluorouracil (5-FU) encapsulated PEGylated mesoporous silica nanoparticles (NPs) hybridized with gold NPs (PEG-Au@Si-5-FU) as gatekeeper for theranostic applications. MATERIALS & METHODS: The prepared targeted and nontargeted formulations were evaluated in vitro in terms of their cellular internalization and toxicity. The prepared theranostic hybrid system was also implemented for computed tomography of HepG2 tumor-bearing nude mice in vivo...
May 18, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28518076/facile-preparation-of-ultrafine-aluminum-hydroxide-particles-with-or-without-mesoporous-mcm-41-in-ambient-environments
#10
Viktor Dubovoy, Ravi Subramanyam, Michael Stranick, Laurence Du-Thumm, Long Pan
An aqueous suspension of nanogibbsite was synthesized via the titration of aluminum aqua acid [Al(H2O)6](3+) with L-arginine to pH 4.6. Since the hydrolysis of aqueous aluminum salts is known to produce a wide array of products with a wide range of size distributions, a variety of state-of-the-art instruments (i.e., (27)Al/(1)H NMR, FTIR, ICP-OES, TEM-EDX, XPS, XRD, and BET) were used to characterize the synthesis products and identification of byproducts. The product, which was comprised of nanoparticles (10-30 nm), was isolated using gel permeation chromatography (GPC) column technique...
May 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28514901/fixed-bed-study-for-bone-char-adsorptive-removal-of-refractory-organics-from-electrodialysis-concentrate-produced-by-petroleum-refinery
#11
Patrícia da Luz Mesquita, Cássia Ribeiro Souza, Nilza Tatiane G Santos, Sônia Denise Ferreira Rocha
Water reuse in industrial processes has been an increasing need encouraged in recent years. However, as the streams are recycled, solutes accumulate, thus requiring purification techniques. Membrane processes (reverse osmosis and electrodialysis) have been implemented and in order to increase the reuse of water at its highest level, crystallization has been evaluated to remove salts from the concentrate produced and get a feasible disposal. Nevertheless, contaminants affect the crystallization performance, thus making the removal of residual organics important for both, the efficiency of crystallization as well as the increase of water reuse...
May 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28514015/preparation-of-mesoporous-basic-mixed-metal-oxides-through-assembly-of-monodispersed-mg-al-layered-double-hydroxide-nanoparticles
#12
Yuya Oka, Yoshiyuki Kuroda, Takamichi Matsuno, Keigo Kamata, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda
Mesoporous basic Mg-Al mixed metal oxides (MMOs) with a high surface area and large pore size were prepared through the assembly of monodispersed layered double hydroxide nanoparticles (LDHNPs) with block copolymer templates. The particle sizes of the LDHNPs were controlled mainly by varying the concentration of tris(hydroxymethyl)aminomethane (THAM), which was used as a surface stabilizing agent for the LDHNPs. LDHNPs and micelles of a block copolymer (Pluronic F127) were assembled to form a composite. The composites were calcined to transform them into mesoporous MMOs and remove the templates...
May 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28513667/hierarchical-self-supported-znaleu-ldh-nanotubes-hosting-luminescent-cdte-quantum-dots
#13
Alysson F Morais, Ivan G N Silva, Sreeprasanth P Sree, Fernando M de Melo, Gert Brabants, Hermi F Brito, Johan A Martens, Henrique E Toma, Christine E A Kirschhock, Eric Breynaert, Danilo Mustafa
Self-supported oligo-layered ZnAlEu LDH nanotubes (∅ 20 nm) self-assemble upon controlled hydrolysis of the metal ions (Zn(2+), Al(3+), Eu(3+)) in the presence of 1,3,5-benzenetricarboxylate anions and non-ionic worm-like micelles. Their high surface area and easily accessible cylindrical mesopores (175 m(2) g(-1); 0.75 cm(3) g(-1)) facilitate interaction with 5 nm CdTe quantum dots, enhancing the overall luminescence behavior.
May 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28513138/in-situ-growth-of-mesoporous-silica-with-drugs-on-titanium-surface-and-their-biomedical-applications
#14
Mimi Wan, Qi Wang, Shuyue Zhan, Xudong Chen, Chun Mao, Yuhong Liu, Jian Shen
Mesoporous silica has been developed for modification of titanium surface as implant materials. Yet, the traditional modification methods failed to effectively construct mesoporous silica on titanium surface evenly and firmly, of which the interaction between mesoporous silica and titanium was mainly physical interaction. Here, in situ growth of mesoporous silica on Titanium surface was performed using a simple evaporation-induced self-assembly strategy. Meantime, in situ introduction of drugs (heparin and vancomycin) to mesoporous silica was also adopted to improve drug loading amount...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28512849/synthesis-and-luminescence-properties-of-brick-shaped-lanthanum-organic-frameworks-with-mesoporous-and-macroporous-architectures
#15
Wanping Chen, Jun Yang, Yue Zhao, Yangjie Hu, Bolin Xiang
Generally, metal-organic frameworks (MOFs) are made up from kinds of repeating microporous structure. Here, a series of Eu(3+) ions activated terephthalate-based lanthanum-organic frameworks (La-MOFs) was synthesized by a hydrothermal reaction. By controlling the reaction time, we obtained some unique brick-shaped La-MOFs in a micron scale size range, and these La-MOFs showed tunable mesoporous and macroporous architectures. It is speculated that the change in the composition and structure of building units results in the formation of this mesoporous and macroporous heterogeneous architectures...
May 16, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28511933/an-initial-demonstration-of-hierarchically-porous-niobium-alkylphosphonates-coordination-polymers-as-potent-radioanalytical-separation-materials
#16
Kai Lv, Chu-Ting Yang, Jun Han, Sheng Hu, Xiao-Lin Wang
Combining the merits of soft-templating and perchlorate oxidation methods, the first-case investigation of niobium alkylphosphonates has uncovered their unique morphology, backbone composition, thermal behavior and huge potentiality as radioanalytical separation materials. These hierarchically porous solids are random aggregates of densely stacked nanolayers perforated with worm-like holes or vesicular voids, manifesting the massif-, tower-like "polymer brush" elevated up to ∼150nm driven by the minimal surface free energy principle...
May 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28511102/highly-effective-antibacterial-activity-by-the-synergistic-effect-of-three-dimensional-ordered-mesoporous-carbon-lysozyme-composite
#17
Jingjing Wang, Lin Tang, Ponisseril Somasundaran, Wei Fan, Guangming Zeng, Yaocheng Deng, Yaoyu Zhou, Jiajia Wang, Yang Shen
Aiming at developing a safe and efficient alternative to traditional drinking water disinfection, this work successfully synthesized a novel antibacterial material with high surface area, ultra large pore size and tunable loading of immobilized lysozyme. The immobilized enzymes exhibit high antibacterial efficacy without forming carcinogenic disinfection byproducts. Critical immobilization parameters were optimized to keep the activity of the immobilized enzyme at a high level. The immobilization of lysozymes on 3DOm COOH could be confirmed by the characterizations of transmission electron microscopy, X-ray diffraction and Zeta-Potential...
May 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28509872/synthesis-of-pyrimethanil-loaded-mesoporous-silica-nanoparticles-and-its-distribution-and-dissipation-in-cucumber-plants
#18
Pengyue Zhao, Lidong Cao, Dukang Ma, Zhaolu Zhou, Qiliang Huang, Canping Pan
Mesoporous silica nanoparticles are used as pesticide carries in plants, which has been considered as a novel method to reduce the indiscriminate use of conventional pesticides. In the present work, mesoporous silica nanoparticles with particle diameters of 200-300 nm were synthesized in order to obtain pyrimethanil-loaded nanoparticles. The microstructure of the nanoparticles was observed by scanning electron microscopy. The loading content of pyrimethanil-loaded nanoparticles was investigated. After treatment on cucumber leaves, the concentrations of pyrimethanil were determined in different parts of cucumber over a period of 48 days using high performance liquid chromatography tandem mass spectrometry...
May 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28508454/light-mediated-reversible-modulation-of-ros-level-in-living-cells-by-using-an-activity-controllable-nanozyme
#19
Faming Wang, Enguo Ju, Yijia Guan, Jinsong Ren, Xiaogang Qu
Nanozymes have shown great potential in bioapplications owing to their low cost, high stability, multiple activity, and biocompatibility. However, most of the known nanozymes are always at turn-on state, hindering their further applications. Herein, a simple and versatile method for constructing activity-controllable nanozymes is presented. To the best of our knowledge, this is the first report to utilize the light-driven isomerization of azobenzene (Azo) and host-guest interaction to reversibly photoregulating the activity of nanozyme...
May 16, 2017: Small
https://www.readbyqxmd.com/read/28507711/interfacial-engineering-of-renewable-metal-organic-framework-derived-honeycomb-like-nanoporous-aluminum-hydroxide-with-tunable-porosity
#20
Ye-Tang Pan, Lu Zhang, Xiaomin Zhao, De-Yi Wang
Novel honeycomb-like mesoporous aluminum hydroxide (pATH) was synthesized via a facile one-step reaction by employing ZIF-8 as a template. This self-decomposing template was removed automatically under acidic conditions without the need for any tedious or hazardous procedures. Meanwhile, the pore size of pATH was easily modulated by tuning the dimensions of the ZIF-8 polyhedrons. Of paramount importance was the fact that the dissolved ZIF-8 in solution was regenerated upon deprotonation of the ligand under mild alkali conditions, and was reused in the preparation of pATH, thus forming a delicate synthesis cycle...
May 1, 2017: Chemical Science
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