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Sulfur Liquid

Boao Song, Kun He, Yifei Yuan, Soroosh Sharifi-Asl, Meng Cheng, Jun Lu, Wissam A Saidi, Reza Shahbazian-Yassar
Two-dimensional (2D) substrates decorated with metal nanoparticles offer new opportunities to achieve high-performance catalytic behavior. However, little is known on how the substrates control the nucleation and growth processes of the nanoparticles. This paper presents the visualization of dynamic nucleation and growth processes of gold nanoparticles on ultrathin MoS2 nanoflakes by in situ liquid-cell transmission electron microscopy (TEM). The galvanic displacement resulting in Au nuclei formation on MoS2 was observed in real time inside the liquid cell...
August 13, 2018: Nanoscale
Philipp Adelhelm, Lukas Medenbach, Ines Escher, Linda Zedler, Benjamin Dietzek, Marc Armbrüster, Nicolas Köwitsch
There is currently intense research on sulfur/carbon composite materials as positive electrodes for rechargeable batteries. Preparation of such composites by ball milling or (melt/solution) impregnation are popular approaches to obtain intimate contact between both elements with the hope to improve battery performance. Here, we report that sulfur shows an unexpected "spillover" effect in contact with porous carbons under ambient conditions. When gently mixing sulfur and porous carbon (e.g. 1:1 mass ratio), complete surface coverage takes place within just a few days along with the loss of sulfurs bulk properties (crystallinity, melting point, Raman signals)...
August 8, 2018: Angewandte Chemie
Feng Jiang, Yuqian Chen, Shaohua Ju, Qinyu Zhu, Libo Zhang, Jinhui Peng, Xuming Wang, Jan D Miller
Recovery of cobalt and lithium from spent Li-ion batteries (LIBs) has been studied using ultrasound-assisted leaching. The primary purpose of this work is to investigate the effects of ultrasound on leaching efficiency of cobalt and lithium. The results were compared to conventional leaching. In this study sulfuric acid was used as leaching agent in the presence of hydrogen peroxide. The cathode active materials from spent battery were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) before and after leaching...
November 2018: Ultrasonics Sonochemistry
Hikmat Ghosson, Adrián Schwarzenberg, Frank Jamois, Jean-Claude Yvin
Background: Metabolomics based on mass spectrometry analysis are increasingly applied in diverse scientific domains, notably agronomy and plant biology, in order to understand plants' behaviors under different stress conditions. In fact, these stress conditions are able to disrupt many biosynthetic pathways that include mainly primary metabolites. Profiling and quantifying primary metabolites remain a challenging task because they are poorly retained in reverse phase columns, due to their high polarity and acid-base properties...
2018: Plant Methods
Yang-Hui Luo, Chen Chen, Chang He, Ying-Yu Zhu, Dan-Li Hong, Xiao-Tong He, Pei-Jing An, Hong-Shuai Wu, Bai-Wang Sun
Through an facile-operating ultrasonic force-assisted liquid exfoliation technology, the single-layered 2-D [Co(CNS)2(pyz)2]n (pyz = pyrazine) nanosheets, with thickness of sub-1.0 nm, have been prepared from the bulk precursors. The atomically thickness and the presence of abundant sulfur atoms with high electronegativity arrayed on the double surfaces of the sheets, making this kind of 2-D MOF (metal-organic framework) nanosheets are highly sensitive to intermolecular interactions. As a result, it can be well dispersed in all kinds of solvent to give a stable colloidal suspension that can maintained for at least one month, accompanied by significant solvatochromic behavior and various optical properties, which thus have shown the potential to be practically applicated as in-situ visual test paper for solvent identification and solvent polarity measurements...
July 26, 2018: ACS Applied Materials & Interfaces
Mark Frenkel, Leonid Dombrovsky, Victor Multanen, Viktor Danchuk, Irina Legchenkova, Shraga Shoval, Yelena Bormashenko, Bernard P Binks, Edward Bormashenko
Self-propulsion of liquid marbles filled with sulfuric acid and coated with hydrophobic fluorosilica powder on a water surface is reported. The prolonged self-propulsion of marbles occurs over a couple of minutes with a typical velocity of the center of mass of the marble being [Formula: see text]. The shell of the marble is not uniform, resulting in the asymmetric absorption of water by a marble, giving rise to the nonuniform thermal field within its volume. The maximum temperature reached at the liquid marble surface was 70 °C...
August 7, 2018: Journal of Physical Chemistry. B
Geetha Iyer, Shweta Agarwal, Bhaskar Srinivasan, Angayarkanni Narayanasamy
Purpose: The aim of the study was to report the occurrence of contamination/replacement of ophthalmic eye drops with liquids of acidic nature in patients treated for nonresponding scleritis. Methods: This was a retrospective interventional case series study. Results: Of the three patients (4 eyes) referred as necrotizing scleritis, two were found to have acid as the content in the bottle/s being used as eye drops, confirmed using biochemical tests...
August 2018: Indian Journal of Ophthalmology
Melody R Lindsay, Maximiliano J Amenabar, Kristopher M Fecteau, Randal V Debes, Maria C Fernandes Martins, Kirsten E Fristad, Huifang Xu, Tori M Hoehler, Everett L Shock, Eric S Boyd
The geochemistry of hot springs and the availability of oxidants capable of supporting microbial metabolisms are influenced by subsurface processes including the separation of hydrothermal fluids into vapor and liquid phases. Here, we characterized the influence of geochemical variation and oxidant availability on the abundance, composition, and activity of hydrogen (H2 )-dependent chemoautotrophs along the outflow channels of two-paired hot springs in Yellowstone National Park. The hydrothermal fluid at Roadside East (RSE; 82...
July 23, 2018: Geobiology
Xin Li, Shuaibo Gao, Pengfei Xing, Kaizhao Dong, Bo Gao, Zhongbao Feng
Considerable amounts of high-quality boron carbide (B4 C) are discarded as J240 sapphire-wafer grinding waste (J240-W), which can be mostly recovered and reutilized after purification for environmental protection. This paper has developed a feasibility method that simultaneously removes the alumina (Al2 O3 ) and iron (Fe) impurities from J240-W with microwave-assisted acid leaching strategy. The influence factors on the Al2 O3 leaching ratio, such as leaching temperature, sulfuric acid concentration, liquid-solid ratio and time, have been investigated and optimized...
October 15, 2018: Journal of Environmental Management
Uplabdhi Tyagi, Neeru Anand, Dinesh Kumar
This study highlights cellulose conversion for the production of 5-Hydroxymethyl Furfural using synergistic effect of modified activated carbon and ionic liquid under moderate reaction conditions. Modified Activated carbon after acid treatment (ACS, ACP, ACH) were used to examine their catalytic activity on hydrolysis of cellulose in [Bmim]Cl medium. Changes in physical-chemical properties were characterized using XRD, FE-SEM, EDX, FT-IR and BET surface area analyser techniques. Modified activated carbon is found competent in enhancing cellulose conversion to Total Reducing Sugars and 5-Hydroxymethyl Furfural...
July 7, 2018: Bioresource Technology
Jeesu Park, Hyewon Hwang, Jae Young Kim, Joon Weon Choi
We present environmentally friendly brake pads produced with three different types of lignin, soda lignin (SL), sulphuric acid lignin (SAL) and heat-treated SAL (HL), as frictional materials to replace phenol formaldehyde resin (PFR, binder) and cashew nut shell liquid (CNSL, filler) in commercial automobile brake pad. Then the performance characteristics of the lignin-added brake pads were tested and compared using several fundamental tests. The results showed that lignin-added brake pads adhered to the SAE standard (0...
August 8, 2018: Environmental Technology
Jemaneh Habtewold, Robert Gordon, Paul Voroney, Vera Sokolov, Andrew VanderZaag, Claudia Wagner-Riddle, Kari Dunfield
Stored liquid dairy manure is a hotspot for methane (CH) emission, thus effective mitigation strategies are required. We assessed sodium persulfate (NaSO), potassium permanganate (KMnO), and sodium hypochlorite (NaOCl) for impacts on the abundance of microbial communities and CH production in liquid dairy manure. Liquid dairy manure treated with different rates (1, 3, 6, and 9 g or mL L slurry) of these chemicals or their combinations were incubated under anoxic conditions at 22.5 ± 1.3°C for 120 d. Untreated and sodium 2-bromoethanesulfonate (BES)-treated manures were included as negative and positive controls, respectively, whereas sulfuric acid (HSO)-treated manure was used as a reference...
July 2018: Journal of Environmental Quality
Gebrekidan Gebresilassie Eshetu, Xabier Judez, Chunmei Li, Maria Martinez-Ibañez, Ismael Gracia, Oleksandr Bondarchuk, Javier Carrasco, Lide M Rodriguez-Martinez, Heng Zhang, Michel Armand
With a remarkably higher theoretical energy density compared to lithium-ion batteries (LIBs) and abundance of elemental sulfur, lithium sulfur (Li-S) batteries have emerged as one of the most promising alternatives among all the post LIB technologies. In particular, the coupling of solid polymer electrolytes (SPEs) with the cell chemistry of Li-S batteries enables a safe and high-capacity electrochemical energy storage system, due to the better processability and less flammability of SPEs compared to liquid electrolytes...
July 30, 2018: Journal of the American Chemical Society
Zhijun Liu, Zhining Liu, Yuhong Li, Jintao Guo, Jianmin Li, Weidong Ren, Shaoshan Tang, Limei Xie, Ying Huang, Liping Huang, Siyu Sun, Ying Zhao
Many previous studies have found that transabdominal ultrasound may allow precise measurement of gastric emptying of liquid meals. However, the clinical use of this technique has been hampered by the limitation that transabdominal ultrasound might not accurately measure gastric emptying of solid meals. It is more important to measure gastric emptying of solids instead of liquids, as gastric emptying of solids is more often delayed than gastric emptying of liquids in gastric motility disorders. Recently, transabdominal ultrasound after oral administration of a cellulose-based gastric contrast agents (TUS-OSCA) has been suggested to be effective in initial screening of gastric lesions...
July 10, 2018: Ultrasound in Medicine & Biology
Lu-Lu Zhang, Jun-Bao Du, Chao-Shu Tang, Hong-Fang Jin, Ya-Qian Huang
Background: Myocardial fibrosis is an important pathological change in many heart diseases, but its pathogenesis is very complex and has not yet been fully elucidated. The study was designed to examine whether endogenous sulfur dioxide (SO2 ) is a novel myocardial fibroblast proliferation and migration inhibitor. Methods: Primary rat myocardial fibroblasts were isolated and transfected with aspartate aminotransferase (AAT1 and AAT2) knockdown lentivirus or empty lentivirus...
July 20, 2018: Chinese Medical Journal
T D Li, F Liu, X F Pan, X Tao, W Zhao, H F Yan
Objective: To develop a method for determination of metabolites of diphenylmethane diisocyanate (MDI) in urine, i.e. methylenedianiline (MDA) by high performance liquid chromatography-tandem mass (LC-MS-MS) . Methods: Urine samples were prepared by hydrolyzation with sulfuric acid and extraction by acetonitrile, and then separated on a Shim-pack XR-ODS column, analyzed with high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) . The external solvent standard calibration were tested. Results: The linearity ranges were 0...
April 20, 2018: Chinese Journal of Industrial Hygiene and Occupational Diseases
Davide Albani, Masoud Shahrokhi, Zupeng Chen, Sharon Mitchell, Roland Hauert, Núria López, Javier Pérez-Ramírez
Ensemble control has been intensively pursued for decades to identify sustainable alternatives to the Lindlar catalyst (PdPb/CaCO3 ) applied for the partial hydrogenation of alkynes in industrial organic synthesis. Although the geometric and electronic requirements are known, a literature survey illustrates the difficulty of transferring this knowledge into an efficient and robust catalyst. Here, we report a simple treatment of palladium nanoparticles supported on graphitic carbon nitride with aqueous sodium sulfide, which directs the formation of a nanostructured Pd3 S phase with controlled crystallographic orientation, exhibiting unparalleled performance in the semi-hydrogenation of alkynes in the liquid phase...
July 6, 2018: Nature Communications
Dennis C Ong, Mark Daniel G de Luna, Sheila Mae B Pingul-Ong, Chi-Chuan Kan
In this study, the recovery of manganese (Mn) and iron (Fe) from groundwater treatment sludge through reductive acid leaching and hydroxide precipitation was investigated. Maximum leached Mn (100%) was obtained using sulfuric acid and hydrogen peroxide at 25 °C. Leached Mn and Fe decreased with the increase in the solid-liquid ratio. Leaching time had minimal effect on Mn and Fe leaching beyond 5 min, while agitation rate had minimal effect beyond 150 rpm. At 25 °C, the rate-limiting step of Mn leaching was diffusion through inert solid components of the sludge, composed mainly of insoluble sand particles...
July 2, 2018: Journal of Environmental Management
Yu Zhang, Fang Wan, Ji-Ti Zhou
Based on biological flue gas desulfurization technology (Bio-FGD) and chelating absorption-biological regeneration technology (BioDeNO x ), simultaneous desulfurization and denitrification by biological methods combined with chelating absorption technology has been proposed in this study. This technique uses an alkaline absorption liquid with Fe(Ⅱ) EDTA to absorb the SO2 and NO in the flue gas. In this study, an attempt is made to simultaneously remove sulfate (SO4 2- ) and Fe(Ⅱ) EDTA-NO/Fe(Ⅲ) EDTA, which are the SO2 and NO absorption byproducts in an anaerobic reactor...
November 8, 2017: Huan Jing Ke Xue= Huanjing Kexue
Wei Zhou, Yan-Fen Fang, Yu Zhang, Chun-Hong Wu, Ying-Ping Huang
Pyrite was used as catalyst to degrade Microcystin-LR (MC-LR) at pH 6.8 under visible light irradiation ( λ >420 nm). X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization showed that pyrite had the layered structure. The ion state of pyrite before and after the reaction was identified using X-Ray Photoelectron Spectroscopy (XPS), confirming the conversion process of Fe(Ⅱ) to Fe(Ⅲ) on the sulfur defect sites. Electron Spin Resonance (ESR) test showed that pyrite photochemical reaction produced hydroxyl radical (·OH)...
September 8, 2017: Huan Jing Ke Xue= Huanjing Kexue
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