搜索结果: 1-15 共查到“化学 water”相关记录71条 . 查询时间(0.679 秒)
近日，中国科学院物理研究所/北京凝聚态物理国家研究中心清洁能源重点实验室E01组岳金明博士生在索鎏敏副研究员的指导下，以浓度为核心变量，采用磷酸钒钠正极为研究对象，针对高盐浓度抑制电极溶解机制问题展开了系统研究。研究表明，在超高盐浓度Water-in-salt电解液中，电极材料溶解得到了很好的抑制，磷酸钒钠正极结构稳定性大大提高，电池电化学性能得到明显提升。31 m WIBS体系中在低倍率0.2C...
A NEW MULTI-SPECTRAL THRESHOLD NORMALIZED DIFFERENCE WATER INDEX (MST-NDWI) WATER EXTRACTION METHOD – A CASE STUDY IN YANHE WATERSHED
Water Extraction MST-NDWI Small Linear River Remote Sensing Yanhe Watershed
2018/5/17
Accurate remote sensing water extraction is one of the primary tasks of watershed ecological environment study. Since the Yanhe water system has typical characteristics of a small water volume and nar...
Researchers Set New Bar For Water-Splitting,CO2-Splitting Techniques（图）
Researchers New Bar Water-Splitting CO2-Splitting Techniques
2017/9/19
We report iron-containing mixed-oxide nanocomposites as highly effective redox materials for thermochemical CO2-splitting and methane partial oxidation in a cyclic redox scheme, where methane was intr...
“Fizzy” soda water could be key in clean and sustainable manufacture of “flat” wonder material:graphene（图）
Fizzy soda water clean sustainable manufacture flat wonder material graphene
2017/9/5
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign h...
New approach improves ability to predict metals’ reactions with water
metals reactions water
2017/7/21
The wide reach of corrosion, a multitrillion-dollar global problem, may someday be narrowed considerably thanks to a new, better approach to predict how metals react with water.Researchers at Oregon S...
Squeezing Every Drop of Fresh Water from Waste Brine
Squeezing Every Drop Fresh Water Waste Brine
2017/7/21
Engineers at the University of California, Riverside have developed a new way to recover almost 100 percent of the water from highly concentrated salt solutions. The system will alleviate water shorta...
Water forms 'spine of hydration' around DNA,group finds
Water forms spine of hydration around DNA group finds
2017/7/20
Water is the Earth’s most abundant natural resource, but it’s also something of a mystery due to its unique solvation characteristics – that is, how things dissolve in it.“It’s uniquely adapted to bio...
Academics build ultimate solar-powered water purifier
Academics solar-powered water purifier
2017/2/16
You’ve seen Bear Grylls turn foul water into drinking water with little more than sunlight and plastic.Now, academics have added a third element — carbon-dipped paper — that may turn this survival tac...
2017年能源、水和环境科学研讨会（Symposia on Energy, Water and Environmental Sciences）
2017年 能源 水 环境科学 研讨会
2017/1/19
Natural waters contain a large number of chemicals reflecting rapid global dissemination of novel substances, including a full range of technology-critical elements (e.g., platinum group and rare eart...
For the first time,scientists catch water molecules passing the proton baton
first time scientists water molecules proton baton
2016/12/13
Water conducts electricity, but the process by which this familiar fluid passes along positive charges has puzzled scientists for decades.But in a paper published in the Dec. 2 issue of the ...
Proven one-step process converts CO2 and water directly into liquid hydrocarbon fuels（图）
converts CO2 water directly liquid hydrocarbon fuels
2016/3/2
A team of University of Texas at Arlington chemists and engineers have proven that concentrated light, heat and high pressures can drive the one-step conversion of carbon dioxide and water directly in...
We are all familiar with boiling a pot of water—flame from a stove heats the base of a metal pot, the metal transfers the heat to the water, and the temperature goes up and up until the water boils. P...
Determination of Arsenic in Water by Potentially Portable Methodology
Arsenic Field Analysis Portable Instrument Water
2014/11/20
Arsenic contamination in groundwater is a worldwide problem. The existing portable field test kits can not provide accurate results when the arsenic concentration is around 10 μg L-1 or lower. This re...
What Can Density Functional Theory Tell Us about Artificial Catalytic Water Splitting?
Density Functional Theory Artificial Catalytic Water Splitting
2014/8/21
Water splitting by artificial catalysts is a critical process in the production of hydrogen gas as an alternative fuel. In this paper, we examine the essential role of theoretical calculations, with p...
Professors' super waterproof surfaces cause water to bounce like a ball
Professors' super waterproof surfaces water to bounce like a ball
2014/6/19
In a basement lab on BYU’s campus, mechanical engineering professor Julie Crockett analyzes water as it bounces like a ball and rolls down a ramp.
This phenomenon occurs because Crockett and her coll...