Results 41 to 50 of about 46,291 (210)
Rare Metals, EarlyView.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 采用恒温培养法研究美国纽约Pelham Bay Park 6种典型淡水湿地沉积物中磷的吸附与解吸行为及其动力学过程。结果表明:湿地沉积物具有强烈吸附溶液中磷的功能,随着溶液中磷浓度的增加,吸附量增大;但是湿地沉积物也有释放磷到溶液中去的功能,释放量为0~41.19 mg/kg,与沉积物吸附磷量的关系不大,沉积物释放磷与沉积物的特性有关。衡量一种淡水湿地沉积物的除磷能力,可根据沉积物最大吸附磷量和吸附解吸附平衡浓度(EPC0)来衡量,6种沉积物中,磷的最大吸附能力强弱依次是:S1>S2>S3>S6>S5 ...
黄树辉, 曾光辉, 黄宏
doaj
Studies on Preparation and Visible-light-induced Photocatalytic Properties of Bismuth-containing Nanocomposites [PDF]
, 2016 如何提高光量子利用率和光量子效率是目前光催化材料研究中的两个关键问题。为了解决铋系半导体光催化剂光生载流子容易复合及其光量子利用率较低的问题，本文采用简单易行的静电纺丝技术与软化学原位合成技术，设计制备一系列分布均匀、能级匹配的铋系纳米复合材料，并围绕这些材料在光催化领域内的应用性能开展研究。在可见光光催化剂的设计和材料的控制合成方面取得了一定的进展，为今后类似材料体系的构筑提供了参考依据，所合成材料具有良好的应用前景。 （1）采用静电纺丝法和溶液原位离子交换法成功合成了Bi2S3 ...
邱英强
core
Rare Metals, EarlyView.ABSTRACT The development of highly efficient and stable nonprecious metal electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial to advance proton exchange membrane (PEM) water electrolysis. In this work, a dual synergistic strategy was proposed by constructing a Ce‐modified MnO2/MnO heterostructure.
Chuanbin Li +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 为探明陕南矿区典型土壤（黄褐土和水稻田沙土）对Mn(Ⅱ)和Ni(Ⅱ)的吸附特性，采用振荡平衡法研究黄褐土与水稻田沙土对Mn(Ⅱ)和Ni(Ⅱ)的等温吸附过程，并用数学模型模拟其吸附动力学过程，结合红外光谱(FTIR)分析，探讨2种土壤吸附Mn(Ⅱ)和Ni(Ⅱ)的机理及其影响因素。结果表明：Mn(Ⅱ)和Ni(Ⅱ)在2种土壤中的吸附均在120 min达到平衡，黄褐土对于Mn(Ⅱ)和Ni(Ⅱ)的吸附能力远远高于水稻田沙土，黄褐土对Mn(Ⅱ)和Ni(Ⅱ)最大吸附量分别为2.12，1.19 mg/g，沙土对Mn(Ⅱ)
宋凤敏, 张兴昌, 葛红光
doaj
Rare Metals, EarlyView.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为了确定生物炭修复草甘膦污染土壤的可行性，通过添加不同比例和种类的生物炭到土壤中，研究土壤对草甘膦的吸附效果。采用吸附动力学拟合、等温吸附分析、红外光谱测定分析方法。结果表明：草甘膦能强烈地吸附在红壤及稻壳炭、竹炭、竹柳炭中，相比于红壤，3种生物炭达到吸附平衡时间短。吸附动力学符合准二级动力学方程，等温吸附符合Freundlich吸附等温方程。Freundlich吸附等温方程中1/n数值均 竹炭 > 红壤 > 稻壳炭。生物炭添加到红壤中，可以提高红壤吸附草甘膦的量，生物炭添加比例越高 ...
王林, 邹明, 刘晓东, 俞元春
doaj
, 2015 分子印迹技术(molecular imprinting technology,MIT)是指制备对特定目标分子具有专一识别性能的聚合物技术。离子印迹技术(ion imprinting technology,IIT)作为分子印迹技术的重要分支,因存在金属离子配位作用而具有很多优势,近年来得到了快速的发展。本文介绍了离子印迹技术原理、制备方法及其在金属的痕量和超痕量分析时的应用,并针对海洋环境监测中非常受关注的典型重金属污染离子(铅、汞、铜、镉、铬、砷)的主要研究进展进行了综述 ...
傅骏青 王晓艳 陈令新, 陈令新
core
Rare Metals, EarlyView.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li +5 more
wiley +1 more source