搜索结果: 1-15 共查到“H2SO4”相关记录38条 . 查询时间(0.694 秒)
采用失重法与电化学方法研究了咪唑和2—苯基—2—咪唑啉对Cu在5%H2SO4水溶液中的缓蚀性能、吸附行为及缓蚀机理. 结果表明,2种化合物对Cu均具有显著的缓蚀作用,且2--苯基—2—咪唑啉的缓蚀效率大于咪唑. 同时,分别采用腐蚀反应中的活化能Ea,吸附过程中的Gibbs自由能ΔGm和吸附焓ΔHm判断了2种化合物在Cu表面上的吸附特性. 结果表明,咪唑和2—苯基—2—咪唑啉在Cu表面上的吸附过程为...
在鼓泡式反应器中,以N,N'-二(2-羟丙基)哌嗪(HPP)-硫酸水溶液为吸收剂,利用初始速率法探讨了SO2吸收反应动力学.结果表明:HPP-H2SO4水溶液吸收SO2为快速反应;吸收速率NA随着SO2进口体积浓度yA和吸收剂浓度CN的增大而增大,随着吸收温度T的升高而降低;吸收速率对CN是0.5级反应,对yA为0.85级反应.同时,建立了HPP-H2SO4水溶液吸收SO2的吸收速率NA与CN、y...
基于BrO3--MnSO4-H2SO4-丙二酸体系的中药电化学指纹图谱
化学振荡 中草药 电化学指纹图谱
2013/8/16
提出了BrO3--MnSO4-H2SO4-丙二酸化学振荡反应体系, 在考察各组分浓度对空白体系稳定性和振荡特征参数影响的基础上, 获得了黄芪、陈皮、葛根等7 种中草药的电化学指纹图谱. 结果表明, 这些指纹图谱可以用于中草药的分析和鉴别, 且快速、准确. 并探讨了中草药振荡行为的原因及其机理.
基于BrO3--MnSO4-H2SO4-丙二酸体系的中药电化学指纹图谱
化学振荡 中草药 电化学指纹图谱
2013/8/26
提出了BrO3--MnSO4-H2SO4-丙二酸化学振荡反应体系, 在考察各组分浓度对空白体系稳定性和振荡特征参数影响的基础上, 获得了黄芪、陈皮、葛根等7 种中草药的电化学指纹图谱. 结果表明, 这些指纹图谱可以用于中草药的分析和鉴别, 且快速、准确. 并探讨了中草药振荡行为的原因及其机理.
One conceivable mechanism of UV-light induced SO2 Oxidation to H2SO4
One conceivable mechanism of UV-light SO2 Oxidation to H2SO4
2010/8/12
The electron-excited chemistry of sulfur dioxide oxidation induced by UV irradiation of air with trace O3 and SO2 is considered. The importance of this mechanism is evaluated based on recent laborator...
Particle formation in the Arctic free troposphere during the ASTAR 2004 campaign: a case study on the influence of vertical motion on the binary homogeneous nucleation of H2SO4/H2O
Arctic free troposphere ASTAR 2004 campaign binary homogeneous nucleation of H2SO4/H2O
2010/2/21
During the ASTAR (Arctic Study of Tropospheric Aerosol and Radiation) campaign nucleation mode particles (4 to 13 nm) were quite frequently observed at altitudes below 4000 m. However, in the upper fr...
氨基酸-BrO-3-Mn2+-H2SO4-丙酮体系的振荡反应。
Electrocatalytic Activity of Ti/TiO2 Electrodes in H2SO4 Solution
voltammetric charge active surface TiO2 electrode
2009/11/16
Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 ...
不锈钢化学镀Ni-P合金在H2SO4溶液中的腐蚀行为
不锈钢 化学镀 Ni-P合金
2009/10/21
利用化学镀方法在1Cr18Ni9Ti不锈钢表面制备了均匀、致密和无表面缺陷的Ni-P合金镀层。X射线衍射分析表明，镀层为非晶态结构；动电位极化曲线测试表明，镀层的自腐蚀电位接近-0.1 V（vs. SCE），较不锈钢的自腐蚀电位（-0.31 V）提高了将近0.2 V；腐蚀速率测定结果表明镀层耐蚀性能优异，对基体不锈钢有很好的防护效果。
非均相温和条件下AlCl3/H2SO4高效催化一锅法合成蒽醌衍生物
蒽醌 路易斯酸 硫酸 一锅法合成
2009/9/14
成功研发了一种与已报道的方法相比合成蒽醌衍生物产量更高的新方法,该方法具有原料易得,收率高,反应时间短,反应条件温和以及操作容易等特点. 合成的蒽醌衍生物的结构由物性数据和光谱结果确定.
浓H2SO4和GA3对榛种子萌发的影响
榛子 浓硫酸 赤霉素 发芽率
2009/6/18
[ 目的] 探讨浓硫酸和GA3 浸种及其交互作用对榛种子萌发的影响。[ 方法] 以平榛为试材, 将榛种子置于浓硫酸中分别浸种0 、
10 、20 和30 min , 对酸蚀处理的种子, 分别用0 、100 、300 和500 mg/ L 赤霉素浸种24 h, 经与用湿沙自然层积3 个月后在恒温箱中催芽。[ 结果] 浓硫酸酸蚀可提高榛种子发芽率, 且随着浓硫酸酸蚀时间的延长, 榛子的出苗率逐渐升高...
Gaseous（DMS, MSA, SO2, H2SO4 and DMSO）and particulate（sulfate and methanesulfonate）sulfur species over the northeastern coast of Crete
MSA SO2 H2SO4 DMSO northeastern coast of Crete
2009/3/11
A detailed study of the levels, the temporal and diurnal variability of the main compounds involved in the biogenic sulfur cycle was carried out in Crete (Eastern Mediterranean) during the Mediterrane...
A novel model to predict the physical state of atmospheric H2SO4/NH3/H2O aerosol particles
novel model atmospheric H2SO4/NH3/H2O aerosol particles
2009/3/11
The physical state of the tropospheric aerosol is largely unknown despite its importance for cloud formation and for the aerosol's radiative properties. Here we use detailed microphysical laboratory m...
The Hohenpeissenberg aerosol formation experiment（HAFEX）：a long-term study including size-resolved aerosol, H2SO4, OH, and monoterpenes measurements
Hohenpeissenberg aerosol formation experiment HAFEX size-resolved aerosol H2SO4
2009/3/10
Ambient aerosol size distributions (>3 nm) and OH, H2SO4, and terpene concentrations were measured from April 1998 to August 2000 at a rural continental site in southern Germany. New particle formatio...
The effects of H2SO4 and (NH4)2SO4 treatments on the chemistry of soil drainage water and pine seedlings in forest soil microcosms
acidification manipulation nitrogen deposition drainage microcosms forest
2009/3/5
An experiment comparing effects of sulphuric acid and reduced N deposition on soil water quality and on chemical and physical growth indicators for forest ecosystems is described. Six H2SO4 and (NH4)...