Results 21 to 30 of about 30,500 (193)
Rare Metals, EarlyView.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为探索硫酸钾肥对黄河水泥沙在静止状态下沉降的影响，以硫酸钾浓度和泥沙粒径为参数，用移液管法研究了5种硫酸钾浓度和4种粒径范围段（
李学凯 +5 more
doaj
Technology development in nano-sized photocatalyst powder preparation technologies [PDF]
, 2006 Nano-sized semiconductor powders for use as photocatalysts have great potential in environmental and energy engineering applications. The photocatalytic activity of photocatalyst is significantly affected by preparation process since the crystalline ...
Leung, DYC, Leung, MKH, Ni, M
core
Rare Metals, EarlyView.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2018 为探究煤矸石对盐碱土壤绿化的改良效果和对土壤微生物的影响，将不同用量（0，10%，20%，30%，40%，50%）和不同粒径（小粒径5 mm，以及小中大粒径等比例的混合粒径）煤矸石施用于盐碱土壤，进行紫花苜蓿盆栽试验，测定紫花苜蓿株高、生物量以及土壤微生物量和酶活性指标。结果表明，不同粒径煤矸石处理的土壤微生物量碳氮，土壤的脲酶、过氧化氢酶、脱氢酶活性，以及紫花苜蓿株高、生物量均随着煤矸石用量的增加呈先增大后降低的趋势，混合粒径、小粒径、中粒径、大粒径煤矸石处理的盐碱土上述指标分别在20%，20%，30%
孔涛 +5 more
doaj
Internal microstructure of arrested charnockite and surrounding gneiss from Kurunegala, Sri Lanka [PDF]
, 2016 第3回極域科学シンポジウム/第32回極域地学シンポジウム 11月30日（金） 国立極地研究所 ...
Hiroi Yoshikuni +9 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Dielectric ceramics are popular for energy storage materials because of their rapid charge–discharge characteristics, whereas their low energy density and efficiency hinder their miniaturization and integration. In this work, the energy storage performance is significantly enhanced through introducing Al2O3 and TiO2 into the 0.425(Bi0.5Na0.5 ...
Qiansi Zhang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 侵蚀泥沙颗粒对深入理解和模拟泥沙及与之有关的化学污染物质输移至关重要。通过对国内外相关研究归纳整理、总结经验，重点围绕土壤水蚀的2个主要过程（细沟间和细沟侵蚀），对侵蚀泥沙颗粒输移形式、各级未分散颗粒的机械组成、不同粒径颗粒的富集规律和分选特征以及影响因素等进行综述与评价。纵观国内外的研究进展，侵蚀泥沙颗粒流失规律的研究已经较为全面和深入，取得了-些共识性成果：（1）未分散状态下的泥沙颗粒粒径分布更适合用来描述、模拟泥沙的输移行为和与之相关的营养污染物质迁移；（2 ...
郝燕芳, 佟帆
doaj
, 2012 本文探讨了 -Al2O3:C晶态粉体的辐照剂量效应, 使用RisTL/OSL-DA-15 型热释光和光释光仪研究其热释光和光释光特性, 结果发现, 相同粒径的-Al2O3:C晶态粉体具有单一热释光峰, 且随着辐照剂量的增加热释光强度不断增加, 但热释光峰位置保持不变, 符合一级动力学模型; 而在相同的辐照剂量和测试条件下, 随着 -Al2O3:C晶态粉体粒径的减小, 其热释光强度先增强后减弱, 热释光峰却逐渐增加至趋于稳定, 表明粒度为4060 m的 -Al2O3:C晶态粉体具有最佳的热释光效应. 同时
胡克艳 +5 more
semanticscholar +1 more source
Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source