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https://www.readbyqxmd.com/read/27914351/photocatalytic-degradation-of-industrial-pulp-and-paper-mill-effluent-using-synthesized-magnetic-fe2o3-tio2-treatment-efficiency-and-characterizations-of-reused-photocatalyst
#1
Wennie Subramonian, Ta Yeong Wu, Siang-Piao Chai
In this work, heterogeneous photocatalysis was used to treat pulp and paper mill effluent (PPME). Magnetically retrievable Fe2O3-TiO2 was fabricated by employing a solvent-free mechanochemical process under ambient conditions. Findings elucidated the successful incorporation of Fe2O3 into the TiO2 lattice. Fe2O3-TiO2 was found to be an irregular and slightly agglomerated surface morphology. In comparison to commercial P25, Fe2O3-TiO2 exhibited higher ferromagnetism and better catalyst properties with improvements in surface area (58...
November 30, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27914341/single-crystalline-titanium-dioxide-hollow-tetragonal-nanocones-with-large-exposed-101-facets-for-excellent-photocatalysis
#2
Zhengcui Wu, Yejing Xue, Zexian Zou, Xia Wang, Feng Gao
Crystal facet engineering and surface modification of semiconductor have become important strategies to improve photocatalytic activity by optimizing surface charge carrier separation/transfer and extending solar spectrum utilization. In this work, we report anatase single-crystalline TiO2 hollow tetragonal nanocones with large exposed (101) facets by a facile liquid-phase interfacial synthetic strategy, using the hydrolysis of tetrabutyltitanate with adscititious water in the organic solvent of cyclohexane and a capping agent of 1, 6-hexanediamine...
November 23, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27914337/restrain-recombination-by-spraying-pyrolysis-tio2-on-nio-film-for-quinoxaline-based-p-type-dye-sensitized-solar-cells
#3
Ying Yu, Xing Li, Zhongjin Shen, Xiaoyu Zhang, Peng Liu, Yuting Gao, Tao Jiang, Jianli Hua
In this work, we reported two new quinoxaline-based sensitizers (BQI and BQII) for p-type dye-sensitized solar cells (p-DSSCs) featuring carboxylic acid and pyridine as anchoring groups, respectively, in combination with triphenylamine donor. The optical, electrochemical and photovoltaic properties of BQI and BQII were investigated. Results showed that BQI-based p-DSSC with carboxylic acid anchoring group obtained higher photoelectric conversion efficiency (PCE) of 0.140%. To further optimize the device performance, we added a layer of TiO2 on the surface of NiO film as a barrier layer, which contributed to the improvement of the photocurrent density from 3...
November 10, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27914329/facile-synthesis-of-go-sno2-tio2-nanofibers-and-their-behavior-in-photovoltaics
#4
Ibrahim M A Mohamed, Van-Duong Dao, Ahmed S Yasin, Ho-Suk Choi, KhalilAbdelrazek Khalil, Nasser A M Barakat
Chemical doping is a widely-used strategy to improve the performance of TiO2 for the dye-sensitized solar cells (DSCs). However, the effect of two efficient dopants has been rarely investigated. We present the synthesis of GO@SnO2/TiO2 nanofibers (NFs) by a facile method using electrospinning and hydrothermal processes. The synthesized NFs are described in terms of morphology, crystallinity and chemistry through FESEM, TEM, HR-TEM, XRD, EDX, XPS, FT-IR and Raman spectra. As the results, the axial ratio and the average diameter of NFs decreased after the hydrothermal treatment and calcination process, respectively...
November 12, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27914251/improved-rhbmp-2-function-on-mbg-incorporated-tio2-nanorod-films
#5
Fei Ge, Mengfei Yu, Cuixia Yu, Jun Lin, Wenjian Weng, Kui Cheng, Huiming Wang
In the process of biomaterials mediated bone regeneration, rhBMP-2 delivery at efficient dose in sustained kinetics is crucial for promoting cell osteogenic differentiation. Meanwhile, surface morphology of the biomaterials could regulate cellular responses as well as strengthen the rhBMP-2 interaction with cells for better bone induction. Herein, TiO2 nanorod films with varied mesoporous bioactive glass (MBG) incorporation amount were designed to strengthen the efficacy of rhBMP-2, basing on optimized loading/release behaviors and surface nanostructure cooperatively...
November 24, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27913240/activity-of-vancomycin-release-from-bioinspired-coatings-of-hydroxyapatite-or-tio2-nanotubes
#6
Daniela Ionita, Daniela Bajenaru-Georgescu, Georgeta Totea, Anca Mazare, Patrik Schmuki, Ioana Demetrescu
Herein we investigate the efficiency of various biomimetic coatings for localized drug delivery, using vancomycin as key therapeutic drug, which is a widely used antibiotic for the treatment of strong infections caused by positive Gram bacteria. We evaluate classical hydroxyapatite and biomimetic hydroxyapatite-collagen coatings obtained by electrochemical deposition as well as TiO2 nanotubes arrays obtained by electrochemical anodization. Surface morphology, compositional and structural data confirm the incorporation of vancomycin into the layers and drug release profiles for vancomycin evaluate their release ability...
November 29, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27913027/potential-effects-of-tio2-nanoparticles-and-ticl4-in-saltwater-to-phaeodactylum-tricornutum-and-artemia-franciscana
#7
D Minetto, G Libralato, A Marcomini, A Volpi Ghirardini
Nanosized titanium dioxide (nTiO2) is widespread in many commercial products and several authors investigated its ecotoxicity effects focusing mainly on freshwater environments. Data on saltwater species are still lacking or present contradicting results. We compared for the first time the toxicity of TiCl4 and nTiO2 considering standard toxicity tests with microalgae Phaeodactylum tricornutum (growth inhibition test, 1.8-90mg/L) and crustacean Artemia franciscana (mortality test, 0.5-64mg/L). For A. franciscana, two alternative scenarios were considered beside standard protocol: i) darkness; and ii) starvation...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27912120/solvothermal-synthesis-of-ag-hybrid-bipo4-heterostructures-with-enhanced-photodegradation-activity-and-stability
#8
Chang-Wei Huang, Mei-Yao Wu, Yang-Wei Lin
In this study, Ag hybrid BiPO4 (Ag/BiPO4) heterostructures were synthesized using a solvothermal method. The morphologies and optical properties of the Ag/BiPO4 heterostructures were drastically different from those of BiPO4 and were highly dependent on the AgNO3:BiPO4 weight percent during the synthesis. The three formulated heterostructures were evaluated for their photocatalytic degradation of methylene blue (MB) under UV light illumination; the 0.5%Ag/BiPO4 heterostructure was observed to result in 99% degradation of MB within 60min, a remarkably higher level of photodegradation activity than the levels caused by TiO2 and BiPO4...
November 22, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27912113/titanium-dioxide-and-cadmium-sulfide-co-sensitized-graphitic-carbon-nitride-nanosheets-composite-photocatalysts-with-superior-performance-in-phenol-degradation-under-visible-light-irradiation
#9
Jinhua Yao, Huan Chen, Fang Jiang, Zhongyi Jiao, Mingchang Jin
In this work, TiO2-CdS-gCNNSs heterojunction photocatalysts were successfully synthesized. CdS was deposited on the surface of gCNNSs via electrostatic attraction; TiOC, TiOCO and TiON bonds were produced in TiO2-CdS-gCNNSs, strengthening the interaction between TiO2 and gCNNSs. The TiO2-CdS-gCNNSs photocatalyst showed excellent photocatalytic activity for phenol degradation under visible-light irradiation, which was higher than that of CdS-gCNNSs, CdS-TiO2 and TiO2-gCNNSs. The improved photocatalytic performance of TiO2-CdS-gCNNSs was ascribed to more adsorption sites, enhanced light harvesting ability and effective separation rate of electron-hole pairs...
November 15, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27910986/catalytic-photodegradation-of-pharmaceuticals-homogeneous-and-heterogeneous-photocatalysis
#10
S Klementova, D Kahoun, L Doubkova, K Frejlachova, M Dusakova, M Zlamal
Photocatalytic degradation of pharmaceuticals (hydrocortisone, estradiol, and verapamil) and personal care product additives (parabens-methyl, ethyl, and propyl derivatives) was investigated in the homogeneous phase (with ferric ions as the catalyst) and on TiO2. Ferric ions in concentrations corresponding to concentrations in natural water bodies were shown to be a significant accelerator of the degradation in homogeneous reaction mixtures. In heterogeneous photocatalytic reactions on TiO2, lower reaction rates, but mineralisation to higher extents, were observed...
December 2, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27909313/nanoscale-self-templating-for-oxide-epitaxy-with-large-symmetry-mismatch
#11
Xiang Gao, Shinbuhm Lee, John Nichols, Tricia L Meyer, Thomas Z Ward, Matthew F Chisholm, Ho Nyung Lee
Direct observations using scanning transmission electron microscopy unveil an intriguing interfacial bi-layer that enables epitaxial growth of a strain-free, monoclinic, bronze-phase VO2(B) thin film on a perovskite SrTiO3 (STO) substrate. We observe an ultrathin (2-3 unit cells) interlayer best described as highly strained VO2(B) nanodomains combined with an extra (Ti,V)O2 layer on the TiO2 terminated STO (001) surface. By forming a fully coherent interface with the STO substrate and a semi-coherent interface with the strain-free epitaxial VO2(B) film above, the interfacial bi-layer enables the epitaxial connection of the two materials despite their large symmetry and lattice mismatch...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27908256/a-review-on-nano-antimicrobials-metal-nanoparticles-methods-and-mechanisms
#12
Edris Hoseinzadeh, Pouran Makhdoumi, Parisa Taha, John Stelling, Hooshyar Hossini, Mohammad Amjad Kamal, Ghulam Md Ashraf
Nanotechnology is a scientific and engineering technology conducted at the Nano-scale, such as in the fields of compound fabric manufacturing, food processing, agricultural processing, and engineering, as well as in medical and medicinal application. In recent decade, nanomaterial applications for antimicrobial works have been interested by many researchers. Available reports show that some of the metal oxide Nanoparticles including; Al2O3, TiO2, ZnO, CuO, Co3O4, In2O3, MgO, SiO2, ZrO2, Cr2O3, Ni2O3, Mn2O3, CoO, and Nickel oxide have toxicity toward several microorganisms and they could successfully kill numerous bacteria...
December 1, 2016: Current Drug Metabolism
https://www.readbyqxmd.com/read/27908112/oscillating-electric-field-effects-on-adsorbed-water-at-rutile-and-anatase-tio2-surfaces
#13
Zdenek Futera, Niall J English
We have performed non-equilibrium molecular dynamics simulations of various TiO2/water interfaces at ambient temperature in presence of oscillating electric fields in frequency range 20-100 GHz and RMS intensities 0.05-0.25 V/Å. Although the externally applied fields are by one order of magnitude lower than the intrinsic electric field present on the interfaces (∼1.5-4.5 V/Å), significant non-thermal coupling of rotational and translational motion of water molecules was clearly observed. Enhancement of the motion, manifested by increase of diffusivity, was detected in the first hydration layer, which is known to be heavily confined by adsorption to the TiO2 surface...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27907856/cdna-aflp-analysis-of-transcripts-induced-in-chickpea-plants-by-tio2-nanoparticles-during-cold-stress
#14
Saeed Amini, Reza Maali-Amiri, Rahmat Mohammadi, Seyyedeh-Sanam Kazemi-Shahandashti
We evaluated the effect of TiO2 nanoparticles (NPs) on cold tolerance (CT) development in two chickpea (Cicer arietinum L.) genotypes (Sel96Th11439, cold tolerant, and ILC533, cold susceptible) by using cDNA-amplified fragment length polymorphism (cDNA-AFLP) technique during the first and sixth days of cold stress (CS) at 4 °C. Selective amplification by primer combinations generated 4200 transcript-derived fragments (TDFs) while 100 of them (2.62%) were differentially expressed. During CS, 60 differentially expressed TDFs of TiO2 NPs-treated plants were cloned and 10 of them produced successfully readable sequences...
November 22, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27905488/advanced-fabrication-of-chemically-bonded-graphene-tio2-continuous-fibers-with-enhanced-broadband-photocatalytic-properties-and-involved-mechanisms-exploration
#15
Qingzhe Zhang, Nan Bao, Xinqiang Wang, Xinde Hu, Xinhan Miao, Mohamed Chaker, Dongling Ma
In this article, a novel route for the synthesis of graphene/TiO2 continuous fibers (GTF) using force-spinning combined with water vapor annealing method is reported for the first time. The morphology, structure and optical properties of the composite were fully characterized. With a single step of heat treatment process using steam at ambient conditions, we were able to initiate a series of chemical reactions, such as reduction of graphene oxide (GO), crystallization of TiO2, formation of C-Ti bond, and introduction of oxygen vacancies into TiO2...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905318/polymer-particles-filled-with-multiple-colloidal-silica-via-in-situ-sol-gel-process-and-their-thermal-property
#16
Hongsik Byun, Jiayun Hu, Phakkhananan Pakawanit, Laongnuan Srisombat, Jun-Hyun Kim
The in situ formation of dielectric silica (SiO2) particles was carried out in the presence of temperature-responsive poly(N-isopropylacrylamide) particles. Unlike the typical sol-gel method used to prepare various SiO2 particles, the highly uniform growth of SiO2 particles was achieved within the cross-linked polymer particles (i.e., the polymer particles were filled with the SiO2 particles) simply by utilizing interfacial interactions, including the van der Waals attractive force and hydrogen bonding in nanoscale environments...
December 1, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27904922/impacts-of-sediment-organic-matter-content-and-ph-on-ecotoxicity-of-coexposure-of-tio2-nanoparticles-and-cadmium-to-freshwater-snails-bellamya-aeruginosa
#17
Taowu Ma, Meng Wang, Shuangjiao Gong, Bin Tian
The environmental factors are expected to affect the ecotoxicity of heavy metals in the presence of engineered nanoparticles (NPs) in aquatic ecosystems. However, in sediment scenario, little is known regarding their impacts on the ecotoxicity of co-exposure of sediment-associated heavy metals and NPs. This study evaluated the impacts of different levels of organic matter (OM) (4.8-11.6%) and pH (6-9) on the ecotoxicological effects of co-exposure of sediment-associated titanium dioxide nanoparticles (TiO2-NPs) and cadmium (Cd) to a freshwater gastropod Bellamya aeruginosa...
November 30, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27903554/a-new-microextraction-technique-for-the-assay-of-alkaloids-in-chinese-compound-formula-based-polyether-sulfone-membrane-fiber-decorated-by-tio2-nanoparticles
#18
Xinjie Sun, Yingqin Wei, Baojuan Hou, Guowei Zhou
A new nanocomposite membrane was used to clean up impurities from complex samples and the obvious synergy was obtained in this paper. The nanocomposite membrane was prepared by dispersing TiO2 nanoparticles in chloroform and filled in the pores and lumen of polyether sulfone membrane fiber. The novel microextraction method showed the ideal selective extraction effect for alkaloids in the formulae composed of Rhizoma coptidis and the excellent clean-up efficiency compared with the single membrane method. The optimum extraction conditions were as follows: chloroform as accepted phase; the number of nanocomposite membrane fiber bars, 7; extraction time, 30 min; pH of the sample solution, 10...
November 29, 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/27901105/photodegradation-of-organic-pollutants-rhb-dye-using-uv-simulated-sunlight-on-ceria-based-tio2-nanomaterials-for-antibacterial-applications
#19
Kaviyarasu Kasinathan, John Kennedy, Manikandan Elayaperumal, Mohamed Henini, Maaza Malik
To photo-catalytically degrade RhB dye using solar irradiation, CeO2 doped TiO2 nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related defects in the CeO2-TiO2 nanocrystals. Two sharp absorption bands at 1418 cm(-1) and 3323 cm(-1) were attributed to the deformation and stretching vibration, and bending vibration of the OH group of water physisorbed to TiO2, respectively. The photocatalytic activities of Ce-TiO2 nanocrystals were investigated through the degradation of RhB under UV and UV+ visible light over a period of 8 hrs...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900429/highly-selective-sio2-nh2-tio2-hollow-microspheres-for-simultaneous-enrichment-of-phosphopeptides-and-glycopeptides
#20
Dongpo Xu, Guoquan Yan, Mingxia Gao, Chunhui Deng, Xiangmin Zhang
Glycosylation and phosphorylation as the commonest and most important posttranslational modifications of proteins play critical roles in biological processes. Specific and sensitive strategies have been developed to identify the glycosylation and phosphorylation of proteins by mass spectrometry but most of these methods have mainly focused on enriching glycopeptides or phosphopeptides separately, and few of them can enrich both of them. In this work, highly selective SiO2-NH2@TiO2 hollow microspheres were designed and synthesized for the simultaneous selective enrichment of both phosphopeptides and glycopeptides...
November 29, 2016: Analytical and Bioanalytical Chemistry
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