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国家自然科学基金(20371023)

作品数:58 被引量:329H指数:12
相关作者:王君张向东张朝红张鹏李莹更多>>
相关机构:辽宁大学沈阳军区疾病预防控制中心东北大学更多>>
发文基金:国家自然科学基金辽宁省教育厅自然科学基金更多>>
相关领域:环境科学与工程理学医药卫生金属学及工艺更多>>

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58 条 记 录,以下是 1-10
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TiO_2光催化降解农药的研究进展被引量:13
2004年
二氧化钛光催化降解农药是一项新兴的、但很有发展潜力的技术。详细阐述了TiO2光催化降解农药的机理、影响因素和研究现状。
王君郭宝东吴晶韩建涛
关键词:TIO2光催化降解技术农药PHH2O2
热处理的锐钛型二氧化钛催化可见光照射损伤牛血清白蛋白被引量:3
2010年
利用紫外-可见(UV-Vis)光谱和荧光光谱研究了可见光照射热处理的锐钛型二氧化钛(TiO2)对牛血清白蛋白(BSA)的损伤,同时对处理前后TiO2的光催化活性进行了比较,并考察了可见光照射时间、TiO2加入量和照射功率等因素对BSA分子损伤的影响。结果表明,经过高温处理锐钛型TiO2可以部分转晶,处理后的TiO2和可见光的联合作用能够导致BSA分子损伤。UV-Vis光谱表现为增色效应,荧光光谱表现为荧光猝灭。且处理后的TiO2的光催化活性好于处理前。对于体系温度为25℃和浓度为1.0×10-5mol/L的BSA溶液,BSA分子的损伤程度随着可见光照射时间、TiO2加入量和照射功率的增加而增大。同步荧光光谱证明了BSA分子中酪氨酸的损伤程度较大。
张朝红韩文明王冬梅胥丹平邓英俏陈中林郜炜
关键词:可见光
超声波法提取氯化血红素的研究被引量:20
2004年
文章详细报导了一种氯化血红素 (Hemin)提取新方法 ,在 2 0 %的加水量 ,超声溶血 10min和提取15min的条件下 ,Hemin的收率和纯度分别达到了 90 %和 96 %。采用此方法不但降低了生产成本和生产周期 ,而且还避免了使用对环境有污染的氯仿和吡啶等溶剂。
王君康平利张向东刘振荣张鹏陈红亮
关键词:超声波氯化血红素
Sonocatalytic degradation of methyl orange in the presence of (nanometer and ordinary) anatase TiO_2 powders被引量:4
2005年
The nanometer and ordinary anatase titanium dioxide(TiO_2) powders were adopted as the sonocatalysts for the degradation of methyl orange used as a model compound for the first time. It was found that the sonocatalytic degradation effect of methyl orange in the presence of TiO_2 powder were much better than that without TiO_2, but the sonocatalytic activity of the nanometer anatase TiO_2 particle was obviously higher than that of ordinary anatase TiO_2 particle. Although there are many factors influencing sonocatalytic degradation of methyl orange, the experimental results showed that the best degradation ratio of methyl orange could be obtained when the experimental conditions were: initial concentration 15 mg/L, nanometer anatase TiO_2 adding amount 750 mg/L, ultrasonic frequency 40 kHz, output power 50 W, pH = 3.0 and temperature 40℃ within 150 min. In addition, the catalytic activity of reused nanometer anatase TiO_2 catalyst was also studied and found to decline gradually comparing with initial nanometer anatase TiO_2 catalyst. All experiments indicated that the method of the sonocatalytic degradation of organic pollutants in the presence of TiO_2 powder was an advisable choice for non- or low-transparent organic wastewaters.
WANGJun GUOBao-dong ZHANGZhao-hong ZHANGXiang-dong WUJing LIHong
薄层色谱法检测磺胺二甲基嘧啶中有关物质被引量:9
2007年
建立限量检测磺胺二甲基嘧啶中杂质的方法.采用薄层色谱法,用两种展开剂系统,分步同向展开对样品中的杂质进行检测.展开剂Ⅰ为氯仿-甲醇-无水甲酸(45 mL:5 mL:0.15 mL),展开剂Ⅱ为4%氨水(V/V)-水-硝基甲烷-二氧六环(3 mL:5 mL:40 mL:50 mL).结果表明,能简便有效地检测出磺胺二甲基嘧啶中各种可能存在的杂质,并能对其进行限量分析.
王新孔玉梅刘彬王君
关键词:薄层色谱法磺胺二甲基嘧啶
TiO_2体系对酸性红B的催化超声降解过程的影响被引量:5
2006年
采用处理过的市售的锐钛型和金红石型纳米TiO2作为声催化剂,低功率的超声波作为激发源,研究了纳米TiO2对酸性红B催化超声降解过程的影响。结果表明:锐钛矿纳米TiO2和金红石型纳米TiO2对酸性红B有着不同的超声降解过程。锐钛型纳米TiO2以空穴氧化为主,使酸性红B脱色和降解过程同时进行,而金红石型纳米TiO2则以自由基氧化为主,是先脱色后降解。锐钛型纳米TiO2降解效果明显优于金红石型纳米TiO2。单纯超声照射下酸性红B没有明显的脱色和降解过程发生。因此,锐钛型纳米TiO2催化超声降解有机污染物的方法具有很好的应用前景。
王君姜岳峰张朝红张向东马腾李莹张鹏孙伟张邯玉
关键词:酸性红B纳米二氧化钛锐钛型金红石型
转晶纳米TiO_2的制备及其声催化活性的研究被引量:5
2005年
The mixed crystal nanometer TiO2 sonocatalyst was prepared by ultrasonic irradiation in hydrogen peroxide solution. The sonocatalytic activities were validated through the degradation of acid red B solution by ultrasonic irradiation in the presence of the title TiO2 catalyst. The results show that the sonocatalytic activity of the title TiO2 catalyst is obviously higher than that of original rutile and anatase nanometer TiO2 catalysts. The degradation ratio of acid red B in the presence of the title TiO2 catalyst surpasses 75%, while the degradation ratios are only 54.62% and 35.24% for rutile and anatase nanometer TiO2 catalysts, respectively.
王君潘志军张朝红张向东温福宇孙伟张邯玉
关键词:TIO2转晶酸性红B
Syntheses and Crystal Structure of Nine-Coordinate Mononuclear Na[ EuⅢ (edta)(H2O)3] · 4H2O and Binuclear Na4[Eu2Ⅲ(Httha)2]·10H2O Complexes
2004年
The crystal and molecular structures of the Na[Eu Ⅲ (edta) ( H2 O) 3] · 4H2O ( edta = ethylenediaminetetraacetic acid) and Na4[Eu2Ⅲ (Httha)2] · 10H2 O ( ttha = triethylenetetraminehexaacetic acid) complexes were determined by single-crystal X-ray structure analyses.The crystal of Na[ EuⅢ (edta) (H2O)3] · 4H2O belongs to orthorhombic crystal system and Fdd2 space group.The crystal data are as follows: a = 1.9415 (15)nm, b = 3.544(3 )nm, c = 1.203(9)nm, V = 8.327(5)nm3, Z = 16, M = 589.27, Dc= 1.880 g· cm-3, μ= 3.108mm-1 and F(000) = 4704.The final R and wR values are 0.0312 and 0.0750 for 2091[I > 2.0σ (I)] reflections, and 0.0344and 0.0766 for all 3932 unique reflections, respectively.The[EuⅢ (edta) (H2O) 3] - anion has a nine-coordinate pseudo-monocapped square antiprismatic structure in which the nine coordinate atoms, two N and seven O, are from one edta ligand and three water molecules.The crystal of Na4[Eu2Ⅲ (Httha)2] · 10H2O belongs to orthorhombic system and Pccn space group.The crystal data are as follows: a = 2.610(3)nm, b = 2.089(3)nm, c = 2.239(3)nm, V =12.208 ( 28 ) nm3, Z = 8, M = 1548.92, Dc= 1.686g·cm-3,μ = 2.115 mm-1andF(000) = 6272.Thefinal R and wR are 0.0625 and 0.1091 for 9834[I > 2.0σ(I)] reflections, and 0.1608 and 0.1471 for all 37818 unique reflections, respectively.The whole complex molecule is composed of two close parts in which each one has a nine-coordinate structure with distorted monocapped square antiprismatic prism.The ttha ligand in the[Eu2Ⅲ (Httha)2] 4- anion coordinates to one Eu Ⅲ ion with three N atoms and four O atoms and to the other Eu Ⅲ ion with two O atoms.
Wang Jun Wang Yu Liu Xinzhu Liu Zhenrong Zhang Zhaohong Tong Jian
关键词:EU
Ultrasonic Degradation of Methyl Orange in Presence of Y2O3 Doping Anatase TiO2 Catalyst
2004年
Various affecting factors and degradation mechanism were studied on ultrasonic degradation of methyl orange adopting Y2O3 doping anatase TiO2 catalyst prepared in laboratory.In the experiment, the UV-VIS spectrophotometer was used to follow and inspect the degradation process of methyl orange.The results indicate that the ultrasonic degradation ratios of methyl orange in the presence of anatase TiO2 catalyst are much better than those without catalyst.Moreover, the catalytic performance of Y2O3 doping anatase TiO2 catalyst is obviously higher than that of anatase TiO2 catalyst without doping.The optimal conditions were adopted in this work and the degradation and COD elimination ratio of methyl orange got to98% and 99.0% in 90 min, respectively.
Wang Jun Guo Baodong Pan Zhijun Liu Zhenrong Wen Fuyu Zhang Zhaohong
关键词:Y2O3DOPINGANATASECATALYSTMETHYLORANGE
纳米TiO_2催化声化学降解酸性红B的研究被引量:4
2005年
以经过高温活化处理的锐钛型纳米TiO2为催化剂,考察了各种因素对酸性红B溶液超声降解反应的影响。结果表明:锐钛型纳米TiO2对酸性红B溶液超声降解反应具有明显的催化作用,其降解效果明显好于单纯使用超声波降解。超声频率40 kHz,输出功率50 W,催化剂用量0.5 g/L,pH=3.0,酸性红B溶液的初始浓度20 mg/L的条件下,60 min降解率即可达80%左右,120 min基本降解完全。因此,纳米锐钛型TiO2催化超声降解偶氮染料的方法切实可行,而且具有良好的应用前景。
李红王君张朝红刘振荣潘志军温福宇关宏宇
关键词:酸性红B超声降解
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