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https://read.qxmd.com/read/30771634/nitrogen-doped-carbon-dots-decorated-ultrathin-nickel-hydroxide-nanosheets-for-high-performance-hybrid-supercapacitor
#1
Zhenyuan Ji, Na Li, Yifei Zhang, Minghua Xie, Xiaoping Shen, Lizhi Chen, Keqiang Xu, Guoxing Zhu
Owing to their unique electronic properties and capability to host diverse functional groups on the surface, carbon dots (CDs) have attracted increasing attention in energy storage field. Herein, ultrathin nitrogen-doped carbon dots (NCDs) decorated nickel hydroxide (Ni(OH)2 ) nanosheets were fabricated by a facile hydrothermal approach, where NCDs play an important role as a structure-directing agent in tuning the size and thickness of the Ni(OH)2 . With the merits of the battery-type faradaic behavior of Ni(OH)2 and high electronic properties of NCDs, the achieved Ni(OH)2 /NCDs ultrathin nanosheets show a specific capacitance of about 1711...
February 11, 2019: Journal of Colloid and Interface Science
https://read.qxmd.com/read/30771414/two-dimensional-cancer-theranostic-nanomaterials-synthesis-surface-functionalization-and-applications-in-photothermal-therapy
#2
REVIEW
Chandran Murugan, Varsha Sharma, Rajesh Kumar Murugan, Gnanasekar Malaimegu, Anandhakumar Sundaramurthy
In recent years, novel two-dimensional (2D) nanomaterials are of great interest for diverse potential applications such as device fabrication, energy storage, sensing and theranostics because of their superlative physical features namely, large surface area, minimal thickness, tunable composition and easier surface modification methods. Rapid exploration in design and fabrication of 2D nano-structures have opened new avenue for cancer theranostics as it can encapsulate group of cancer cells and inflict major damage with great specificity in a non-invasive manner...
February 13, 2019: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://read.qxmd.com/read/30770645/lithium-photo-intercalation-of-cds-sensitized-wo%C3%A2-anode-for-energy-storage-and-photoelectrochromic-applications
#3
Zhuoran Wang, Hsien-Chieh Chiu, Andrea Paolella, Karim Zaghib, George Demopoulos
Integration of solar energy harvesting and storage functions attracts significant research attention as it holds promise for ultimate development of light-chargeable devices. In this context, we investigate a functional nanocomposite anode that does not only permit electrochemical energy storage via Li-ion photo-intercalation, but also exhibits potential for photoelectrochromic applications. The nanocomposite is made of the Li-ion intercalation compound WO3 (thinly coated with TiO2) and sensitized by the photoactive semicoductor CdS...
February 15, 2019: ChemSusChem
https://read.qxmd.com/read/30769950/subsurface-microbial-hydrogen-cycling-natural-occurrence-and-implications-for-industry
#4
REVIEW
Simon P Gregory, Megan J Barnett, Lorraine P Field, Antoni E Milodowski
Hydrogen is a key energy source for subsurface microbial processes, particularly in subsurface environments with limited alternative electron donors, and environments that are not well connected to the surface. In addition to consumption of hydrogen, microbial processes such as fermentation and nitrogen fixation produce hydrogen. Hydrogen is also produced by a number of abiotic processes including radiolysis, serpentinization, graphitization, and cataclasis of silicate minerals. Both biotic and abiotically generated hydrogen may become available for consumption by microorganisms, but biotic production and consumption are usually tightly coupled...
February 15, 2019: Microorganisms
https://read.qxmd.com/read/30769342/association-between-different-types-of-plant-based-diets-and-leptin-levels-in-healthy-volunteers
#5
Patrycja Gogga, Aleksandra Śliwińska, Ewa Aleksandrowicz-Wrona, Syliwa Małgorzewicz
Leptin is an important factor regulating appetite and energety metabolism; disturbances in its signaling are related to adiposity and contribute to the excessive body fat. About a third of the human population is overweight or suffers from obesity, as well as from associated medical conditions. It is well established that vegetarian, especially vegan, diet is very effective in lowering BMI and body fat, thus, plant-based diets are associated with a lower risk of obesity. The aim of this study was to evaluate the plasma levels of leptin in lacto-ovo-vegetarian and vegan volunteers with normal BMI...
February 15, 2019: Acta Biochimica Polonica
https://read.qxmd.com/read/30768752/metal-organic-frameworks-for-hydrogen-energy-applications-advances-and-challenges
#6
Vasudeva Rao Bakuru, Marilyn DMello, Suresh Babu Kalidindi
Hydrogen is in limelight as an environmental benign alternative to fossil fuels from few decades. To bring the concept of hydrogen economy from academic labs to real world certain challenges needs to be addressed in the areas of hydrogen production, storage and its use in fuel cells. Crystalline metal-organic frameworks (MOFs) with unprecedented surface areas are considered as potential materials for addressing the challenges in all these three fronts. MOFs combine the diverse chemistry of molecular linkers with their ability to co-ordinate to metal ions and clusters...
February 15, 2019: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://read.qxmd.com/read/30768312/racemic-amino-acid-piezoelectric-transducer
#7
Sarah Guerin, Joseph O'Donnell, Ehtsham U Haq, Cian McKeown, Christophe Silien, Fernando M F Rhen, Tewfik Soulimane, Syed A M Tofail, Damien Thompson
Single crystal L-amino acids can exhibit technologically useful piezoelectric and nonlinear optical properties. Here we predict, using density functional theory, the piezoelectric charge and strain and voltage tensors of the racemic amino acid DL alanine, and use the modeling data to guide the first macroscopic and nanoscopic piezoelectric measurements on DL-alanine single crystals and polycrystalline aggregates. We demonstrate voltage generation of up to 0.8 V from DL-alanine crystal films under simple manual compression, twice as high as other amino acid crystals...
February 1, 2019: Physical Review Letters
https://read.qxmd.com/read/30767519/electro-and-solar-driven-fuel-synthesis-with-first-row-transition-metal-complexes
#8
Kristian E Dalle, Julien Warnan, Jane J Leung, Bertrand Reuillard, Isabell S Karmel, Erwin Reisner
The synthesis of renewable fuels from abundant water or the greenhouse gas CO2 is a major step toward creating sustainable and scalable energy storage technologies. In the last few decades, much attention has focused on the development of nonprecious metal-based catalysts and, in more recent years, their integration in solid-state support materials and devices that operate in water. This review surveys the literature on 3d metal-based molecular catalysts and focuses on their immobilization on heterogeneous solid-state supports for electro-, photo-, and photoelectrocatalytic synthesis of fuels in aqueous media...
February 15, 2019: Chemical Reviews
https://read.qxmd.com/read/30767311/beyond-activated-carbon-graphite-cathode-derived-li-ion-pseudocapacitors-with-high-energy-and-high-power-densities
#9
Gang Wang, Steffen Oswald, Markus Löffler, Klaus Müllen, Xinliang Feng
Supercapacitors have aroused considerable attention due to their high power capability, which enables charge storage/output in minutes or even seconds. However, to achieve a high energy density in a supercapacitor has been a long-standing challenge. Here, graphite is reported as a high-energy alternative to the frequently used activated carbon (AC) cathode for supercapacitor application due to its unique Faradaic pseudocapacitive anion intercalation behavior. The graphite cathode manifests both higher gravimetric and volumetric energy density (498 Wh kg-1 and 431...
February 15, 2019: Advanced Materials
https://read.qxmd.com/read/30767291/paving-the-path-toward-reliable-cathode-materials-for-aluminum-ion-batteries
#10
REVIEW
Feng Wu, Haoyi Yang, Ying Bai, Chuan Wu
Aluminum metal is a high-energy-density carrier with low cost, and thus endows rechargeable aluminum batteries (RABs) with the potential to act as an inexpensive and efficient electrochemical device, so as to supplement the increasing demand for energy storage and conversion. Despite the enticing aspects regarding cost and energy density, the poor reversibility of electrodes has limited the pursuit of RABs for a long time. Fortunately, ionic-liquid electrolytes enable reversible aluminum plating/stripping at room temperature, and they lay the very foundation of RABs...
February 15, 2019: Advanced Materials
https://read.qxmd.com/read/30765708/perceptions-of-bioenergy-with-carbon-capture-and-storage-in-different-policy-scenarios
#11
Rob Bellamy, Javier Lezaun, James Palmer
There is growing interest in bioenergy with carbon capture and storage (BECCS) as a possible technology for removing CO2 from the atmosphere. In the first study of its kind, we investigate whether and how different forms of incentivisation impact on public perceptions of this technology. We develop a new experimental method to triangulate perceptions of BECCS in different policy scenarios through quantitative measurement and qualitative elicitation. Here we show that the type of policy instrument used to incentivise BECCS significantly affects perceptions of the technology itself...
February 14, 2019: Nature Communications
https://read.qxmd.com/read/30764961/reinforcing-graphene-oxide-nanoparticles-to-enhance-viscoelastic-performance-of-epoxy-nanocomposites
#12
Suneev Anil Bansal, Amrinder Pal Singh, Suresh Kumar
Graphene, two-dimensional (2D) sheet of carbon structure, in its purest form has shown potential for application in the fields of electronics, semiconductor, sensing, energy, displays, biomedical engineering, etc. Graphene oxide (GO) is easier to synthesise than the pristine graphene, scores comparable in terms of mechanical strength, but lags in electrical and thermal conductivity. GO plays an important role in nano-composites for use in loading conditions requiring superior mechanical strength. GO is a suitable candidate as reinforcement due to its better solubility in the epoxy polymer, resulting in improved properties...
July 1, 2019: Journal of Nanoscience and Nanotechnology
https://read.qxmd.com/read/30764610/dual-layered-material-and-doped-heterostructure-sns-sn-sb-2-s-3-as-efficient-energy-material-the-insights-of-diffusion-doping
#13
Suman Bera, Amlan Roy, Amit K Guria, Sagar Mitra, Narayan Pradhan
Insights of formation mechanism of a dual layered and doped heterostructure material SnIIS-SnIV:Sb2S3 is reported. In presence of mixed alkyl thiols, first nanotubes of Sb2S3 were formed and then introducing Sn(IV), SnIIS were deposited onto the surface of these tubular structures. Annealing further at a constant temperature, sluggish transformation resulted Sn(II)S-Sn(IV) doped Sb2S3 heterostructure which finally turned to flake like layered doped Sb2S3 nanostructures. SnS and Sb2S3, both being layered materials, were explored for the study of Na-ion storage, and these heterostructures were observed superior in comparison to the individual material as well as the final doped nanostructures...
February 15, 2019: Journal of Physical Chemistry Letters
https://read.qxmd.com/read/30764605/cobalt-in-nitrogen-doped-graphene-as-single-atom-catalyst-for-high-sulphur-content-lithium-sulphur-batteries
#14
Zhenzhen Du, Xingjia Chen, Wei Hu, ChengHao Chuang, Shuai Xie, Ajuan Hu, Wensheng Yan, Xianghua Kong, Xiaojun Wu, Hengxing Ji, Li-Jun Wan
Due to their high theoretical energy density and low cost, lithium-sulphur (Li-S) batteries are promising next-generation energy storage devices. The electrochemical performance of Li-S batteries largely depends on the efficient reversible conversion of Li polysulphides to Li2 S in discharge, and to elemental S during charging. Here, we report on our discovery that monodisperse cobalt atoms embedded in nitrogen-doped graphene (Co-N/G) can trigger the surface-mediated reaction of Li polysulphides. Using a combination of operando X-ray absorption spectroscopy and first-principles calculation, we reveal that the Co-N-C coordination centre serves as a bifunctional electrocatalyst to facilitate both the formation and the decomposition of Li2 S in discharge and charge processes, respectively...
February 14, 2019: Journal of the American Chemical Society
https://read.qxmd.com/read/30763900/nickel-molybdate-nanorods-supported-on-three-dimensional-porous-nickel-film-coated-on-copper-wire-as-an-advanced-binder-free-electrode-for-flexible-wire-type-asymmetric-micro-supercapacitors-with-enhanced-electrochemical-performances
#15
Leila Naderi, Saeed Shahrokhian
Wire-shaped micro-supercapacitors attracted extensive attentions in next-generation portable and wearable electronics, due to advantages of miniature size, lightweight and flexibility. Herein, NiMoO4 nanorods supported on Ni film coated Cu wire are successfully fabricated thorough direct deposition of Ni film onto Cu wire as the conductive substrate, followed by growth of the NiMoO4 nanorods on Ni film coated Cu wire substrate by means a hydrothermal annealing process. The prepared 3D, porous electrode demonstrates extremely high areal specific capacitance of 12...
February 7, 2019: Journal of Colloid and Interface Science
https://read.qxmd.com/read/30763804/low-carbon-heating-and-cooling-by-combining-various-technologies-with-aquifer-thermal-energy-storage
#16
M Pellegrini, M Bloemendal, N Hoekstra, G Spaak, A Andreu Gallego, J Rodriguez Comins, T Grotenhuis, S Picone, A J Murrell, H J Steeman
A transition to a low carbon energy system is needed to respond to global challenge of climate change mitigation. Aquifer Thermal Energy Storage (ATES) is a technology with worldwide potential to provide sustainable space heating and cooling by (seasonal) storage and recovery of heat in the subsurface. However, adoption of ATES varies strongly across Europe, because of both technical as well as organizational barriers, e.g. differences in climatic and subsurface conditions and legislation respectively. After identification of all these barriers in a Climate-KIC research project, six ATES pilot systems have been installed in five different EU-countries aiming to show how such barriers can be overcome...
January 15, 2019: Science of the Total Environment
https://read.qxmd.com/read/30763771/macronutrients-and-the-adipose-liver-axis-in-obesity-and-fatty-liver
#17
REVIEW
Caroline C Duwaerts, Jacquelyn J Maher
Macronutrient metabolism is a highly orchestrated process, with adipose tissue and liver each playing central roles in nutrient uptake, processing, transport and storage. These two tissues form an important metabolic circuit -- particularly as it relates to lipids as the primary storage form of excess energy. The function of the circuit is influenced by many factors, including the quantity and type of nutrients consumed and their impact on the overall health of the tissues. In this review we will begin with a brief summary of the homeostatic disposition of lipids between adipose tissue and liver and how these processes can become dysregulated in obesity...
February 11, 2019: Cellular and Molecular Gastroenterology and Hepatology
https://read.qxmd.com/read/30763331/optimal-sizing-and-energy-scheduling-of-isolated-microgrid-considering-the-battery-lifetime-degradation
#18
Muhammad Sufyan, Nasrudin Abd Rahim, ChiaKwang Tan, Munir Azam Muhammad, Siti Rohani Sheikh Raihan
The incessantly growing demand for electricity in today's world claims an efficient and reliable system of energy supply. Distributed energy resources such as diesel generators, wind energy and solar energy can be combined within a microgrid to provide energy to the consumers in a sustainable manner. In order to ensure more reliable and economical energy supply, battery storage system is integrated within the microgrid. In this article, operating cost of isolated microgrid is reduced by economic scheduling considering the optimal size of the battery...
2019: PloS One
https://read.qxmd.com/read/30763138/silica-based-infiltrations-for-enhanced-zirconia-resin-interface-toughness
#19
N C Ramos, M R Kaizer, T M B Campos, J Kim, Y Zhang, R M Melo
Novel silica-based infiltrations on the surface of zirconia have the potential to improve their bondability, allowing for the etching/silane adhesive bonding technique. Nonetheless, adhesively bonded joints are subject to mixed tensile and shear stresses when the restoration is in occlusal service. Thus, we aimed to investigate the effect of 2 novel silica-based infiltrations on the interfacial toughness of adhesively bonded zirconia using the Brazil nut method, which allows for controlled types of stresses to be applied at the interfaces...
February 14, 2019: Journal of Dental Research
https://read.qxmd.com/read/30762337/three-dimensional-porous-carbon-nanotubes-reduced-graphene-oxide-fiber-from-rapid-phase-separation-for-high-rate-all-solid-state-supercapacitor
#20
Wujun Ma, Min Li, Xing Zhou, Jihang Li, Yanmao Dong, Meifang Zhu
Graphene fiber-based supercapacitors are rising as one of the greatest potentials for portable/ wearable energy-storage devices. However, their rate performance is not well-pleasing, which greatly impedes their broad practical applications. Herein, 3D porous CNT/rGO fibers were prepared by a non-solvent induced rapid phase separation method followed by hydrazine vapor reduction. Benefit from their three-dimensional porous structure, large specific surface area and high conductivity, the fabricated supercapacitor exhibits a high volume capacitance of 54...
February 14, 2019: ACS Applied Materials & Interfaces
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