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A highly stable membrane with hierarchical structure for wide pH range flow batteries
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作者 Jing Hu Donglei Yu +3 位作者 Tianyu Li Huamin Zhang Zhizhang Yuan Xianfeng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第5期80-86,共7页
A membrane with high stability and ion conductivity in wide pH range is essential for energy storage devices.Here,we report a novel membrane with hierarchical core-shell structure,which demonstrates high stability and... A membrane with high stability and ion conductivity in wide pH range is essential for energy storage devices.Here,we report a novel membrane with hierarchical core-shell structure,which demonstrates high stability and ion conductivity,simultaneously under a wide pH range applications.Spectral characterizations and theoretical calculation indicate that the non-solvent induces the chain segment configuration and eventually leads to polymer-polymer phase separation,thus forming hierarchical porous core-shell structure.Benefiting from this structure,an acidic vanadium flow battery(VFB)with such a membrane shows excellent performance over 400 cycles with an energy efficiency(EE)of above 81%at current density of 120 mA cm^(-2) and an alkaline zinc-iron flow battery(AZIFB)delivers a cycling stability for more than 200 cycles at 160 mA cm^(-2),along with an EE of above 82%.This paper provides a cost-effective and simple way to fabricate membranes with high performance for variety of energyrelated devices. 展开更多
关键词 Energy storage wide ph range flow batteries Hierarchical porous membrane Core-shell structure High stability
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Fe_(2)O_(3)/TiO_(2)/reduced graphene oxide-driven recycled visible-photocatalytic Fenton reactions to mineralize organic pollutants in a wide pH range
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作者 Ru Zheng Dehong Yang +2 位作者 Yao Chen Zhenfeng Bian Hexing Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2023年第12期11-20,共10页
Photocatalytic Fenton reactions combined the advantages from both photocatalysis and Fenton reaction in mineralizing organic pollutants. The key problems are the efficiency and recycling stability. Herein, we reported... Photocatalytic Fenton reactions combined the advantages from both photocatalysis and Fenton reaction in mineralizing organic pollutants. The key problems are the efficiency and recycling stability. Herein, we reported a novel Fe_(2)O_(3)/TiO_(2)/reduced graphene oxide(FTG) nanocomposite synthesized by a facile solvothermal method. The TiO_(2)in FTG degraded organic pollutants and mineralized intermediates via photocatalysis under visible light irradiation, which could also promote Fenton reaction by accelerating Fe^(3+)-Fe^(2+)recycle. Meanwhile, the Fe_(2)O_(3)rapidly degraded organic pollutants via Fenton reactions, which also promoted photocatalysis by enhancing visible light absorbance and diminishing photoelectronhole recombination. The high distribution of TiO_(2)and Fe_(2)O_(3)on rGO, together with their strong interaction resulted in enhanced synergetic cooperation between photocatalysis and Fenton reactions, leading to the high mineralization efficiency of organic pollutants. More importantly, it could also inhibit the leaching of Fe species, leading to the long lifetime of FTG during photocatalytic Fenton reactions in a wide pH range from 3.4 to 9.2. 展开更多
关键词 Fe_(2)O_(3)/TiO_(2)/rGO nanocomposite(FTG) Visible-photocatalytic Fenton reactions Synergetic effect Pollutant mineralization Strong durability in a wide ph range
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A NEW SOLVENT POLYMERIC MEMBRANE pH SENSOR WITH WIDE LINEAR pH RANGE 被引量:1
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作者 Ruo YUAN Ya Qin CHAI +1 位作者 Liang LIU Ru Qin YU 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第10期837-840,共4页
A new solvent polymeric membrane (SPM)pH2sensor based on 4,4'-bis (N, N-didecylamino)methyl)azobenzene as neutral carricr has been reported. It has excellent pH response characteristics with the linear response ra... A new solvent polymeric membrane (SPM)pH2sensor based on 4,4'-bis (N, N-didecylamino)methyl)azobenzene as neutral carricr has been reported. It has excellent pH response characteristics with the linear response range (1.7—13.2)much wider than that of similar SPM pH sensors reported so far. The sensor has a theoretical Nernstian response of 57.4+0.2V/pH(at 20℃)without super—Nernstian response phenomenon. 展开更多
关键词 ph A NEW SOLVENT POLYMERIC MEMBRANE ph SENSOR WITH wide LINEAR ph RANGE SPM
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一种具有恒定缓冲容量的宽程pH缓冲体系 被引量:1
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作者 张延妮 尚晓 +1 位作者 王慧 岳宣峰 《大学化学》 CAS 2017年第7期88-92,共5页
选择柠檬酸、磷酸、硼酸、肼、二甲胺阳离子、二乙胺阳离子等具有不同p Ka的6种弱酸组成混合缓冲液,该缓冲体系可在pH 2-12范围内发挥缓冲作用;通过对缓冲液中不同组分浓度的调整使缓冲溶液在整个缓冲范围内都具有较为恒定的缓冲容量,... 选择柠檬酸、磷酸、硼酸、肼、二甲胺阳离子、二乙胺阳离子等具有不同p Ka的6种弱酸组成混合缓冲液,该缓冲体系可在pH 2-12范围内发挥缓冲作用;通过对缓冲液中不同组分浓度的调整使缓冲溶液在整个缓冲范围内都具有较为恒定的缓冲容量,缓冲容量达0.7C平均,而这些复杂的精确计算和作图都可通过软件Sigmaplot来实现。 展开更多
关键词 稳定缓冲容量 宽程 ph缓冲体系
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不同pH值对小麦幼苗根系P、Fe、Zn吸收和转运的影响 被引量:2
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作者 胡海燕 周岩 +2 位作者 贺杰 刘明久 茹振钢 《河南农业科学》 CSCD 北大核心 2013年第4期35-39,共5页
为揭示作物对酸、碱的抗逆机制,探讨提高作物营养元素含量和广适性的途径,选用5个pH值水平(4.0、5.0、6.5、8.0、9.0)的营养液,对2个小麦品种(百农矮抗58和百农3217)进行处理,通过测量单株根长、根数、根干质量以及P、Fe和Zn的含量,研... 为揭示作物对酸、碱的抗逆机制,探讨提高作物营养元素含量和广适性的途径,选用5个pH值水平(4.0、5.0、6.5、8.0、9.0)的营养液,对2个小麦品种(百农矮抗58和百农3217)进行处理,通过测量单株根长、根数、根干质量以及P、Fe和Zn的含量,研究环境pH值对小麦幼苗根系生长及其对营养元素吸收转运的影响。结果显示,小麦幼苗根系对P、Fe、Zn的吸收和转运在不同pH值处理间以及品种间的变化趋势基本一致,但变化幅度存在显著差异;pH值呈酸性有利于根系的生长发育及Fe、Zn的吸收和P转运,呈碱性有利于Fe、Zn转运;根系对营养元素的吸收不但受环境pH值和品种的影响,而且存在pH值处理与品种间的互作,但地上部不存在互作。小麦根系通过调控营养元素吸收和转运的效率来应答环境pH值的变化,但调控程度不同导致了品种酸、碱抗性和适应范围的差异。 展开更多
关键词 根系 碱逆境 广适性 营养元素 小麦 ph
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二十一世纪水稻育种新战略Ⅱ.利用远缘杂交和多倍体双重优势进行超级稻育种 被引量:102
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作者 蔡得田 袁隆平 卢兴桂 《作物学报》 CAS CSCD 北大核心 2001年第1期110-116,共7页
本文论述了远缘杂交和多倍体化结合利用基因组间和多倍体杂种优势,开创水稻育种新途 径的策略。纵观水稻育种的历史,无论是常规杂交育种,还是杂交稻育种,其研究战略都是建立在有 性生殖和二倍体基础上的,归根结底,都是利用栽培稻... 本文论述了远缘杂交和多倍体化结合利用基因组间和多倍体杂种优势,开创水稻育种新途 径的策略。纵观水稻育种的历史,无论是常规杂交育种,还是杂交稻育种,其研究战略都是建立在有 性生殖和二倍体基础上的,归根结底,都是利用栽培稻同一基因组(A基因组)内优良基因的重组以及 从野生稻向栽培稻引入少数优良基因。从作物进化趋势看,水稻是二倍体,基因组小、DNA含量低、 染色体小,增加基因组数,提高倍性水平,利用异源多倍体杂种优势将是水稻育种新途径。针对同源 四倍体水稻结实率低的关键问题,可采取拉大亲缘关系距离、减少多价体形成,应用广亲和、无融合 生殖基因等措施,从遗传机理上提高多倍体水稻结实率。按三步实施战略;一、选用极端类型籼粳稻、 爪哇稻,诱导亚种间杂种多倍体;二、诱导亚洲栽培稻和非洲栽培稻以及非洲野生稻种间杂种多倍体; 三、诱导 AA基因组的栽培稻与其它不同基因组野生稻(BB、 CC、 BBCC、 CCDD、 DD、 EE、 FF、 GG、 HHJJ)的种间多倍体。在实施过程中发挥一些特殊基因材料的特殊作用,如广亲和基因对于克服籼便 杂种一代不育性、特别是雌败育的作用,无融合生殖缺乏减数分裂发生和受精过程对于克服染色体配 展开更多
关键词 育种战略 异源多倍体 无融合生殖 广亲和 ph基因 水稻 超级稻 远缘杂交
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Synthesis, characterization, and property test of crystalline polyferric sulfate adsorbent used in treatment of contaminated water with a high As(Ⅲ) content 被引量:3
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作者 Ping-chao Ke Zhi-hong Liu Lin Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第10期1217-1225,共9页
A crystalline polyferric sulfate(PFS) adsorbent was synthesized by oxidizing and precipitating ferrous ions in air atmospheric conditions. The morphology, structure, specific surface area(SSA), and adsorptive efficacy... A crystalline polyferric sulfate(PFS) adsorbent was synthesized by oxidizing and precipitating ferrous ions in air atmospheric conditions. The morphology, structure, specific surface area(SSA), and adsorptive efficacy of the adsorbent to As(Ⅲ) were characterized by scanning electron microscope(SEM) and transmission electron microscopy(TEM) images, X-ray diffraction(XRD) patterns, Fourier-transform infrared(FTIR) spectra, BET SSA analyses, and adsorption experiments. The adsorbent showed a near-spherical aggregate structure and had good crystallinity. A significant amount of α-goethite co-precipitated with PFS in the case of the initial ferrous concentration of 1 mol/L and increased SSA of the adsorbent. The stability region of ferric compounds in the process was drawn and applied to analyze the iron behavior during the synthesis. The adsorption of As(Ⅲ) in high As(Ⅲ)-containing solutions fitted the Langmuir isotherm model adequately. The absorbent with co-precipitation of α-goethite showed good adsorbability for As(Ⅲ) and good filtering performance in the high As(Ⅲ)-containing solution of 10–100 mg/L under acidic, neutral, and alkaline conditions(pH 2.09–9.01). After the adsorption process, the stability of the residues bearing As(Ⅲ) was evaluated by toxic characteristic leaching procedure(TCLP) tests. The results indicated that the residues were extremely stable, and the concentrations of arsenic in the leaching solutions were less than 0.01 mg/L. 展开更多
关键词 polyferric sulfate crystal structure α-goethite high As(Ⅲ)-containing contaminated water wide ph range As(Ⅲ) adsorption
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Luminescent silver nanoclusters for efficient detection of adenosine triphosphate in a wide range of pH values 被引量:1
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作者 Meijia Liu Xiangling Ren +8 位作者 Xin Liu Longfei Tan Hui Li Jing Wei Changhui Fu Qiong Wu Jun Ren Hongbo Li Xianwei Meng 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第12期3117-3120,共4页
In this work,polymethacrylic acid(PMAA)-templated silver nanoclusters(Ag NCs)were developed as the fluorescent probe for the efficient and sensitive detection of adenosine triphosphate(ATP)in a wide range of pH values... In this work,polymethacrylic acid(PMAA)-templated silver nanoclusters(Ag NCs)were developed as the fluorescent probe for the efficient and sensitive detection of adenosine triphosphate(ATP)in a wide range of pH values.The fluorescence intensity of the Ag NCs could keep stable with pH values ranging from2.5 to 9.3.The detection of ATP was based on the quenching of the fluorescent Ag NCs in the presence of ATP.The fluorescence quenching of the Ag NCs with increasing ATP concentration was studied at pH 2.5,4.5,7.0 and 8.5 which involved a wide pH environment in body fluids.The limit of detection(LOD)for ATP was as low as 0.1 mmol/L in an acidic environment with pH of 2.5 and all the linear correlation coefficients were satisfactory under wide-span pH values from 2.5 to 8.5.In addition,the sensitive determination of ATP was also achieved by adding copper ions(Cu^2+).The high selectivity and rapid detection process proved that the fluorescent probe had great potential to detect ATP in biological samples under different pH conditions. 展开更多
关键词 Adenosine triphosphate Silver nanoclusters Copper ions wide ph environment Fluorescence detection
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Fenton氧化处理难降解有机废水研究进展 被引量:14
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作者 王锐 刘宪华 +1 位作者 王勇 邵宗泽 《工业水处理》 CAS CSCD 北大核心 2022年第5期58-66,共9页
Fenton氧化属于高级氧化技术,具有反应时间短、降解效率高、操作简单等优点,是处理难降解有机废水方法中最具应用前景的方法之一。然而,传统Fenton氧化法存在一些技术缺陷,包括反应pH范围过窄、产生含铁污泥以及H_(2)O_(2)投加量较高等... Fenton氧化属于高级氧化技术,具有反应时间短、降解效率高、操作简单等优点,是处理难降解有机废水方法中最具应用前景的方法之一。然而,传统Fenton氧化法存在一些技术缺陷,包括反应pH范围过窄、产生含铁污泥以及H_(2)O_(2)投加量较高等。针对Fenton氧化的局限性,综述了解决这些问题的最新技术措施,包括拓展Fenton初始反应pH至中性或碱性、减少铁泥产生及铁泥循环利用、原位产生H_(2)O_(2),并对每种措施的基本原理及处理难降解有机污染物的应用进行了综述。 展开更多
关键词 FENTON氧化 难降解有机废水 原位产生H2O2 铁泥减量 ph范围
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不同价态Ce-MOF衍生材料的吸附除磷性能及机理比较 被引量:5
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作者 何皎洁 徐雨虹 +1 位作者 杨悦 杨利伟 《环境化学》 CAS CSCD 北大核心 2020年第3期715-725,共11页
通过在N2气氛中的热处理,从Ce-MOF中衍生出一系列多级的微/纳米铈基复合材料.Ce-MOF在空气中完全分解形成二氧化铈,价态由三价转变为四价.而在N2中较低温度(400℃或500℃)下煅烧会形成稳定的部分热解的Ce-MOF(N),具有较高的Ce(Ⅲ)含量.... 通过在N2气氛中的热处理,从Ce-MOF中衍生出一系列多级的微/纳米铈基复合材料.Ce-MOF在空气中完全分解形成二氧化铈,价态由三价转变为四价.而在N2中较低温度(400℃或500℃)下煅烧会形成稳定的部分热解的Ce-MOF(N),具有较高的Ce(Ⅲ)含量.与完全分解的产物相比,虽然完全分解的产物具有较高的比表面积,但是部分分解的样品对磷酸盐的吸附效果是完全分解产物的2—4倍.这种差异证明铈基材料的不同价态对除磷性能有显著影响,相比于四价铈离子,三价铈在与磷酸盐结合中起主要作用.与Ce-MOF(A)相比,Ce-MOF(N)是一种高Ce(Ⅲ)含量的铈基纳米材料,其饱和吸附容量为187.2 mg·g-1,吸附速度快,pH适用范围极广,为pH 2—12,并且在竞争阴离子存在下也对磷酸盐具有很高的选择性.与此同时,相比于常用的金属盐吸附剂,Ce-MOF(N)在碱性条件下具有明显增强的磷酸盐吸附能力.这是因为表面Ce(Ⅲ)的部分水解带来了更多的羟基,增加了磷酸根离子交换的活性位点.此外,通过分析FTIR、XPS、XRD和Zeta电位,Ce(Ⅲ)样品对磷酸根的吸附机理主要为静电吸引,离子交换和表面沉积,而对于完全分解的铈基材料Ce-MOF(A)静电吸引是主要机理. 展开更多
关键词 磷酸盐 吸附 铈基纳米复合材料 ph值宽 MOF 部分热分解
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抗穗发芽合成小麦改良品系的筛选及遗传分析 被引量:2
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作者 藏天青 刘玉娥 +8 位作者 马春芳 李潇 王希友 郝明 张连全 袁中伟 姜博 刘登才 甯顺腙 《四川农业大学学报》 CSCD 北大核心 2023年第6期998-1007,共10页
【目的】筛选抗穗发芽的合成小麦改良品系,分析潜在的相关基因。【方法】6个环境(2年3点)下,对129份改良品系进行了穗发芽抗性的鉴定及评价,同时利用Wheat 55K芯片数据进行全基因组关联分析。【结果】获得3份抗穗发芽品系(发芽指数GI≤0... 【目的】筛选抗穗发芽的合成小麦改良品系,分析潜在的相关基因。【方法】6个环境(2年3点)下,对129份改良品系进行了穗发芽抗性的鉴定及评价,同时利用Wheat 55K芯片数据进行全基因组关联分析。【结果】获得3份抗穗发芽品系(发芽指数GI≤0.2;发芽率GR≤40%),分别为红皮品系L2741、L3006、白皮品系L586,得到3个显著关联的位点。【结论】获得的3份抗穗发芽品系可在培育抗穗发芽品种中利用,获得46个可能的候选基因,其中4个基因主要与植物抗逆性有关,推测其在小麦抗穗发芽中起重要作用。 展开更多
关键词 人工合成小麦改良品系 穗发芽 全基因型组关联分析
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快大型黄羽肉鸡肉品质性状的遗传参数估计和关键基因挖掘 被引量:10
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作者 杨欣婷 郑麦青 +6 位作者 谭晓冬 赵桂苹 黄超 李森 李韦 文杰 刘冉冉 《畜牧兽医学报》 CAS CSCD 北大核心 2021年第9期2416-2428,共13页
旨在挖掘快大型黄羽肉鸡胸肌肉品质性状的重要候选区间和基因。本研究以1923只快大型黄羽肉鸡为素材,于56日龄屠宰并测定屠宰和胸肌肉品质性状;利用“京芯一号”55K SNP芯片进行基因分型,利用传统最佳线性无偏预测(BLUP)、基因组最佳线... 旨在挖掘快大型黄羽肉鸡胸肌肉品质性状的重要候选区间和基因。本研究以1923只快大型黄羽肉鸡为素材,于56日龄屠宰并测定屠宰和胸肌肉品质性状;利用“京芯一号”55K SNP芯片进行基因分型,利用传统最佳线性无偏预测(BLUP)、基因组最佳线性无偏预测(GBLUP)和全基因组关联分析(GWAS)等方法进行遗传参数估计和QTL区间/关键基因的检测。结果显示,胸肌pH、肉色L*值和b*值的遗传力中等(0.21~0.38),肉色a*值的遗传力较低(<0.20)。GWAS共鉴定到18个达到全基因组水平潜在显著阈值的SNPs和5个达到全基因组显著水平阈值的SNPs,分别位于3、5(Chr5:48.49~49.06 Mb)、11(Chr11:15.51~15.69 Mb)和28号染色体上,这些SNPs能解释肉品质性状1.51%~8.19%的遗传变异。鉴定到胸肌pH和肉色性状的候选基因ARHGEF18、BCO1、BEGAIN、CDYL2、DLK1、EVL、NSL1、SLC25A47、WARS、ZFYVE26。其中,BCO1是已报道的鸡胸肌肉色b*值的主效基因;SLC25A47属于溶质载体家族成员,影响L*24 h。同时发现,位于5号染色体上的2个单倍型对胸肌pH、肉色性状均有极显著影响。以上结果为黄羽肉鸡肉品质遗传选择方案优化和分子育种技术研发奠定了重要基础。 展开更多
关键词 黄羽肉鸡 ph 肉色 遗传参数 全基因组关联分析(GWAS)
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NiCo_(2)S_(4)/N microspheres grown on N,S co-doped reduced graphene oxide as an efficient bifunctional electrocatalyst for overall water splitting in alkaline and neutral pH 被引量:2
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作者 Haoquan Li Long Chen +6 位作者 Pengfei Jin Yafei Li Jianxiang Pang Juan Hou Shanglong Peng Gang Wang Yulin Shi 《Nano Research》 SCIE EI CSCD 2022年第2期950-958,共9页
It is of vital importance to design efficient and low-cost bifunctional catalysts for the electrochemical water splitting under alkaline and neutral pH conditions.In this work,we report an efficient and stable NiCo_(2... It is of vital importance to design efficient and low-cost bifunctional catalysts for the electrochemical water splitting under alkaline and neutral pH conditions.In this work,we report an efficient and stable NiCo_(2)S_(4)/N,S co-doped reduced graphene oxide(NCS/NS-rGO)electrocatalyst for water splitting,in which NCS microspheres are composed of one-dimentional(1D)nanorods grown homogeneously on the surface of NS-rGOs).The synergetic effect,abundant active sites,and hybridization of NCS/NS-rGO endow their outstanding electrocatalytic performance for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in both alkaline and neutral conditions.Furthermore,NCS/NS-rGO employed as both anode and cathode in a two-electrode alkaline and neutral system electrolyzers deliver 10 mA/cm^(2) with the low cell voltage of 1.58 V in alkaline and 1.91 V in neutral condition.These results illustrate the rational design of carbon-supported nickel-cobalt based bifunctional materials for practical water splitting over a wide pH range. 展开更多
关键词 wide ph range bifunctional electrocatalyst overall water splitting NiCo_(2)S_(4)/N Sco-doped reduced graphene oxide(NCS/NS-rGO)
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