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https://www.readbyqxmd.com/read/28885008/metallic-transition-metal-selenide-holey-nanosheets-for-efficient-oxygen-evolution-electrocatalysis
#1
Zhiwei Fang, Lele Peng, Haifeng Lv, Yue Zhu, Chunshuang Yan, Shengqi Wang, Pranav Kalyani, Xiaojun Wu, Guihua Yu
Catalysts for oxygen evolution reaction (OER) are pivotal to the scalable storage of sustainable energy by means of converting water to oxygen and hydrogen fuel. Designing efficient electrocatalysts combining the features of excellent electrical conductivity, abundant active surface and structural stability still remains a critical challenge. Here we report the rational design and controlled synthesis of metallic transition metal selenide NiCo2Se4 based holey nanosheets as a highly efficient and robust OER electrocatalyst...
September 8, 2017: ACS Nano
https://www.readbyqxmd.com/read/28880991/a-comparison-of-alkaline-water-and-mediterranean-diet-vs-proton-pump-inhibition-for-treatment-of-laryngopharyngeal-reflux
#2
Craig H Zalvan, Shirley Hu, Barbara Greenberg, Jan Geliebter
Importance: Laryngopharyngeal reflux (LPR) is a common disorder with protean manifestations in the head and neck. In this retrospective study, we report the efficacy of a wholly dietary approach using alkaline water, a plant-based, Mediterranean-style diet, and standard reflux precautions compared with that of the traditional treatment approach of proton pump inhibition (PPI) and standard reflux precautions. Objective: To determine whether treatment with a diet-based approach with standard reflux precautions alone can improve symptoms of LPR compared with treatment with PPI and standard reflux precautions...
September 7, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28845976/from-chlorella-to-nestlike-framework-constructed-with-doped-carbon-nanotubes-a-biomass-derived-high-performance-bifunctional-oxygen-reduction-evolution-catalyst
#3
Guanghua Wang, Yijie Deng, Jinnan Yu, Long Zheng, Li Du, Huiyu Song, Shijun Liao
The development of effective bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is significant for energy conversion systems, such as Li-air batteries, fuel cells, and water splitting technologies. Herein, a Chlorella-derived catalyst with a nestlike framework, composed of bamboolike nanotubes that encapsulate cobalt nanoparticles, has been prepared through a facile pyrolysis process. It achieves perfect bifunctional catalysis both in ORR and OER on a single catalyst...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28833679/self-templated-fabrication-of-moni4-moo3-x-nanorod-arrays-with-dual-active-components-for-highly-efficient-hydrogen-evolution
#4
Yu-Yun Chen, Yun Zhang, Xing Zhang, Tang Tang, Hao Luo, Shuai Niu, Zhi-Hui Dai, Li-Jun Wan, Jin-Song Hu
A binder-free efficient MoNi4 /MoO3-x nanorod array electrode with 3D open structure is developed by using Ni foam as both scaffold and Ni source to form NiMoO4 precursor, followed by subsequent annealing in a reduction atmosphere. It is discovered that the self-templated conversion of NiMoO4 into MoNi4 nanocrystals and MoO3-x as dual active components dramatically boosts the hydrogen evolution reaction (HER) performance. Benefiting from high intrinsic activity, high electrochemical surface area, 3D open network, and improved electron transport, the resulting MoNi4 /MoO3-x electrode exhibits a remarkable HER activity with extremely low overpotentials of 17 mV at 10 mA cm(-2) and 114 mV at 500 mA cm(-2) , as well as a superior durability in alkaline medium...
August 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28772926/markedly-enhanced-surface-hydroxyl-groups-of-tio%C3%A2-nanoparticles-with-superior-water-dispersibility-for-photocatalysis
#5
Chung-Yi Wu, Kuan-Ju Tu, Jin-Pei Deng, Yu-Shiu Lo, Chien-Hou Wu
The benefits of increasing the number of surface hydroxyls on TiO₂ nanoparticles (NPs) are known for environmental and energy applications; however, the roles of the hydroxyl groups have not been characterized and distinguished. Herein, TiO₂ NPs with abundant surface hydroxyl groups were prepared using commercial titanium dioxide (ST-01) powder pretreated with alkaline hydrogen peroxide. Through this simple treatment, the pure anatase phase was retained with an average crystallite size of 5 nm and the surface hydroxyl group density was enhanced to 12...
May 22, 2017: Materials
https://www.readbyqxmd.com/read/28731319/few-layered-mo-1-x-wxs2-hollow-nanospheres-on-ni3s2-nanorod-heterostructure-as-robust-electrocatalysts-for-overall-water-splitting
#6
Meiyong Zheng, Jing Du, Baopu Hou, Cai-Ling Xu
Owing to unique optical, electronic, and catalytic properties, MoS2 have received increasing interest in electrochemical water splitting. Herein, few-layered Mo(1-x)WxS2 hollow nanospheres-modified Ni3S2 heterostructures are prepared through a facile hydrothermal method to further enhance the electrocatalytic performance of MoS2. The doping of W element optimizes the electronic structure of MoS2@Ni3S2 thus improving the conductivity and charge-transfer ability of MoS2@Ni3S2. In addition, benefitting from the few-layered hollow structure of Mo(1-x)WxS2, the strong electronic interactions between Mo(1-x)WxS2 and Ni3S2 and the hierarchical structure of one-dimensional nanorods and three-dimensional Ni foam, massive active sites and fast ion and charge transportation are obtained...
August 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28724475/blood-profile-and-meat-quality-of-holstein-friesian-steers-finished-on-total-mixed-ration-or-flaxseed-oil-supplemented-pellet-mixed-with-reed-canary-grass-haylage
#7
D T Utama, S G Lee, K H Baek, W S Chung, I A Chung, D I Kim, G Y Kim, S K Lee
Holstein-Friesian steer beef production is renowned globally as a secondary product of the milk industry. Grass feeding is a common practice in raising Holstein steers because of its low cost. Furthermore, grass feeding is an alternative way to produce beef with a balanced n-6 to n-3 fatty acids (FAs) ratio. However, the performance and meat quality of Holstein-Friesian cattle is more likely to depend on a high-quality diet. The aim of this study was to observe whether feeding two mixed diets; a corn-based total mixed ration (TMR) with winter ryegrass (Lolium perenne) or flaxseed oil-supplemented pellets with reed canary grass haylage (n-3 mix) provided benefits on carcass weight, meat quality and FA composition compared with cattle fed with reed canary grass (Phalaris arundinacea) haylage alone...
July 20, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28718291/porous-structured-ni-fe-p-nanocubes-derived-from-a-prussian-blue-analogue-as-an-electrocatalyst-for-efficient-overall-water-splitting
#8
Cuijuan Xuan, Jie Wang, Weiwei Xia, Zongkai Peng, Zexing Wu, Wen Lei, Kedong Xia, Huolin L Xin, Deli Wang
Exploring nonprecious metal electrocatalysts to replace the noble metal-based catalysts for full water electrocatalysis is still an ongoing challenge. In this work, porous structured ternary nickel-iron-phosphide (Ni-Fe-P) nanocubes were synthesized through one-step phosphidation of a Ni-Fe-based Prussian blue analogue. The Ni-Fe-P nanocubes exhibit a rough and loose porous structure on their surface under suitable phosphating temperature, which is favorable for the mass transfer and oxygen diffusion during the electrocatalysis process...
August 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28688257/co2-alters-community-composition-of-freshwater-phytoplankton-a-microcosm-experiment
#9
Xiaoli Shi, Shengnan Li, Lijun Wei, Boqiang Qin, Justin D Brookes
The effects of CO2 and related changes in water carbonate chemistry on freshwater phytoplankton were studied in in situ microcosm experiments, performed in East Lake Taihu, in August 2013 and April 2014, respectively. The microcosm treatments represented low (270ppm), present (380ppm), and high (750ppm) pCO2 conditions. Elevated CO2 decreased pH and increased aqueous CO2 concentrations, and did not change alkalinity. The maximum reduction of pH was 0.26 when CO2 increased from current level to 750ppm at the ending of experiment in the spring...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28666630/hydrogen-gas-generation-from-metal-aluminum-water-interaction-in-municipal-solid-waste-incineration-mswi-bottom-ash
#10
Arumugam Nithiya, Amirhomayoun Saffarzadeh, Takayuki Shimaoka
In the present research, municipal solid waste incineration (MSWI) bottom ash (BA) residues from three incinerators (N, K, and R) in Japan were collected for hydrogen gas generation purpose. The samples were split into four particle size fractions: (1) d≤0.6, (2) 0.6≤d≤1.0, (3) 1.0≤d≤2.0, and (4) 2.0≤d≤4.75mm for the characterization of metal aluminum, the relationship between the present metal aluminum and hydrogen gas production, and the influence of external metal aluminum on the enhancement of hydrogen gas...
June 27, 2017: Waste Management
https://www.readbyqxmd.com/read/28618279/analyzing-the-impacts-of-three-types-of-biochar-on-soil-carbon-fractions-and-physiochemical-properties-in-a-corn-soybean-rotation
#11
Saroop S Sandhu, David A N Ussiri, Sandeep Kumar, Rajesh Chintala, Sharon K Papiernik, Douglas D Malo, Thomas E Schumacher
Biochar is a solid material obtained when biomass is thermochemically converted in an oxygen-limited environment. In most previous studies, the impacts of biochar on soil properties and organic carbon (C) were investigated under controlled conditions, mainly laboratory incubation or greenhouse studies. This 2-year field study was conducted to evaluate the influence of biochar on selected soil physical and chemical properties and carbon and nitrogen fractions for two selected soil types (clay loam and a sandy loam soil) under a corn (Zea mays L...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28586217/integrated-hierarchical-cobalt-sulfide-nickel-selenide-hybrid-nanosheets-as-an-efficient-three-dimensional-electrode-for-electrochemical-and-photoelectrochemical-water-splitting
#12
Yang Hou, Ming Qiu, Gyutae Nam, Min Gyu Kim, Tao Zhang, Kejun Liu, Xiaodong Zhuang, Jaephil Cho, Chris Yuan, Xinliang Feng
Developing highly active electrocatalysts for photoelectrochemical water splitting is critical to bring solar/electrical-to-hydrogen energy conversion processes into reality. Herein, we report a three-dimensional (3D) hybrid electrocatalyst that is constructed through in situ anchoring of Co9S8 nanosheets onto the surface of Ni3Se2 nanosheets vertically aligned on an electrochemically exfoliated graphene foil. Benefiting from the synergistic effects between Ni3Se2 and Co9S8, the highly conductive graphene support, and large surface area, the novel 3D hybrid electrode delivers superior electrocatalytic activity toward water reduction in alkaline media, featuring overpotentials of -0...
June 7, 2017: Nano Letters
https://www.readbyqxmd.com/read/28550777/disolved-organic-matter-dom-removal-from-bio-treated-coking-wastewate-using-a-new-polymeric-adsorbent-modified-with-dimethylamino-groups
#13
Wenlan Yang, Chengda He, Xiaozhi Wang, Ya Zhang, Zhipeng Cheng, Benlin Dai, Lili Zhang
In the current study a new recyclable aminated hyper-cross-linked polymeric adsorbent (A-HPA) was prepared for effective removal of DOM from BTCW. Possibly benefited from its unique structure of polystyrene matrix, sufficient aminated groups and high specific surface area, A-HPA could remove DOM from BTCW through the synergetic effect of π-π interactions, acid-base interactions and micropore filling, and exhibited the highest removal efficiency than the other adsorbents. Moreover, the exhausted A-HPA was amenable to effective regeneration by using acid and alkaline solution, allowing for repeated use with a constant removal efficiency...
October 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28516411/preparation-of-essential-oil-based-microemulsions-for-improving-the-solubility-ph-stability-photostability-and-skin-permeation-of-quercetin
#14
Xia Lv, Tiantian Liu, Huipeng Ma, Yan Tian, Lei Li, Zhen Li, Meng Gao, Jianbin Zhang, Zeyao Tang
Quercetin can bring many benefits to skin based on its various bioactivities. However, the therapeutic effect of quercetin is limited due to the poor water solubility, pH instability, light instability, and skin permeation. The aim of the present work was applying essential oil-based microemulsions to improve the solubility, pH stability, photostability, and skin permeation of quercetin for topical application. Peppermint oil (PO-ME), clove oil (CO-ME), and rosemary oil (RMO-ME) were selected as model essential oils...
May 17, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28507120/highly-active-catalyst-derived-from-a-3d-foam-of-fe-po3-2-ni2p-for-extremely-efficient-water-oxidation
#15
Haiqing Zhou, Fang Yu, Jingying Sun, Ran He, Shuo Chen, Ching-Wu Chu, Zhifeng Ren
Commercial hydrogen production by electrocatalytic water splitting will benefit from the realization of more efficient and less expensive catalysts compared with noble metal catalysts, especially for the oxygen evolution reaction, which requires a current density of 500 mA/cm(2) at an overpotential below 300 mV with long-term stability. Here we report a robust oxygen-evolving electrocatalyst consisting of ferrous metaphosphate on self-supported conductive nickel foam that is commercially available in large scale...
May 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28475935/a-comparative-study-on-the-radioprotective-potential-of-the-polyphenolic-glycoconjugates-from-medicinal-plants-of-rosaceae-and-asteraceae-families-versus-their-aglycones
#16
Magdalena Szejk, Tomasz Poplawski, Anna Czubatka-Bienkowska, Alicja Klaudia Olejnik, Izabela Pawlaczyk-Graja, Roman Gancarz, Halina Malgorzata Zbikowska
Radioprotective potential of the polyphenolic glycoconjugates, isolated from flowers of Sanguisorba officinalis L. (So) and Erigeron canadensis L. (Ec), and from leaves of Fragaria vesca L. (Fv) and Rubus plicatus Whe. Et N. E. (Rp) as well as their aglycones (SoA, EcA, FvA and RpA, respectively), against γ-radiation-induced lipid peroxidation in human plasma and DNA damage in lymphocytes, were investigated in vitro. These properties were assessed by measuring the concentration of thiobarbituric acid reactive substances (TBARS) and using the alkaline comet assay, and were compared to the protective effects of rutin (R) and quercetin (Q)...
June 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28362485/nitrogen-doped-nanoporous-carbon-membranes-with-co-cop-janus-type-nanocrystals-as-hydrogen-evolution-electrode-in-both-acidic-and-alkaline-environments
#17
Hong Wang, Shixiong Min, Qiang Wang, Debao Li, Gilberto Casillas, Chun Ma, Yangyang Li, Zhixiong Liu, Lain-Jong Li, Jiayin Yuan, Markus Antonietti, Tom Wu
Self-supported electrocatalysts being generated and employed directly as electrodes for energy conversion has been intensively pursued in the fields of materials chemistry and energy. Herein, we report a synthetic strategy to prepare freestanding hierarchically structured, nitrogen-doped nanoporous graphitic carbon membranes functionalized with Janus-type Co/CoP nanocrystals (termed as HNDCM-Co/CoP), which were successfully applied as a highly efficient, binder-free electrode in the hydrogen evolution reaction (HER)...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28296136/one-step-in-situ-growth-of-iron-nickel-sulfide-nanosheets-on-feni-alloy-foils-high-performance-and-self-supported-electrodes-for-water-oxidation
#18
Cheng-Zong Yuan, Zhong-Ti Sun, Yi-Fan Jiang, Zheng-Kun Yang, Nan Jiang, Zhi-Wei Zhao, Umair Yaqub Qazi, Wen-Hua Zhang, An-Wu Xu
Efficient and durable oxygen evolution reaction (OER) catalysts are highly required for the cost-effective generation of clean energy from water splitting. For the first time, an integrated OER electrode based on one-step direct growth of metallic iron-nickel sulfide nanosheets on FeNi alloy foils (denoted as FeNi3 S2 /FeNi) is reported, and the origin of the enhanced OER activity is uncovered in combination with theoretical and experimental studies. The obtained FeNi3 S2 /FeNi electrode exhibits highly catalytic activity and long-term stability toward OER in strong alkaline solution, with a low overpotential of 282 mV at 10 mA cm(-2) and a small Tafel slope of 54 mV dec(-1) ...
May 2017: Small
https://www.readbyqxmd.com/read/28216892/antioxidant-and-hepatoprotective-potential-of-phenol-rich-fraction-of-juniperus-communis-linn-leaves
#19
Akash Ved, Amresh Gupta, Ajay Kumar Singh Rawat
BACKGROUND: Juniperus communis Linn. is an important plant in India traditional system of medicine which is widely used by different tribes in many countries. OBJECTIVE: In the present study, the antioxidant, cytotoxic and hepatoprotective activities of Juniperus communis leaves were investigated against various models. MATERIALS AND METHODS: ethanolic extract (70% v/v) of J. communis leaves was successively extracted using hexane and ethyl acetate to prepare various fractions...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28151582/perovskite-carbon-composites-applications-in-oxygen-electrocatalysis
#20
REVIEW
Yinlong Zhu, Wei Zhou, Zongping Shao
Oxygen electrocatalysis, i.e., oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), plays an extremely important role in oxygen-based renewable-energy technologies such as rechargeable metal-air batteries, regenerative fuel cells and water splitting. Perovskite oxides have recently attracted increasing interest and hold great promise as efficient ORR and OER catalysts to replace noble-metal-based catalysts, owing to their high intrinsic catalytic activity, abundant variety, low cost, and rich resources...
February 2, 2017: Small
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