Li1-xNaxV3O8电极在硫酸锂-水-乙醇体系中的电化学性能

A series of Li_(1-x)Na_xV_3O_8 materials was prepared by solution reaction followed by calcination method and their electrochemical performances in 2 M Li_2SO_4-water-ethanol solution as negative electrodes for aqueous electrolyte lithium ion battery were studied and compared each other.X-ray diffraction analysis revealed that partially substituting sodium for lithium in LiV_3O_8 could increase the interlayer distances of (100) plane.Cyclic voltammetric experiments have demonstrated that the Li~ insertion and extraction kinetics of Li_(0.7)Na_(0.3)V_3O_8 is superior to that of LiV_3O_8.Charge/discharge results showed that the discharge specific capacity of Li_(0.7)Na_(0.3)V_3O_8 electrode is higher than that of LiV_3O_8 electrode.     

硫酸氢钠催化合成丁酸戊酯

以正丁酸和戊醇为原料，硫酸氢钠为催化剂合成了丁酸戊酯．最佳合成条件：以0．1mol正丁酸为基准，醇酸摩尔比为1．2：1，催化剂用量0．2克，甲苯5毫升，反应时间30min，丁酸的酯化率可达99．3％，在无甲苯存在下，合成食品级丁酸戊酯，酯化率可达99．7％．     

酸枣仁皂甙的镇静作用研究

酸枣仁皂忒（JBSD）20mg/kg,40mg/kg可明显抑制小鼠的自发活动,延长异戊巴比妥钠对小鼠的睡眠时间,对阈下催眠剂的异戊巴比妥钠有协同作用,显著降低戊四氮引起的惊厥率.实验证明了酸枣仁皂甙对中枢神经系统的镇静作用.     

杭州市区污染物消光特性研究

利用美国IMPROVE能见度公式,分析2011年6月至2012年5月杭州大气复合污染综合监测数据,研究污染物的消光特征,确定首要消光物质.研究结果表明,随着能见度降低,污染物消光系数在大气总消光系数中的比例逐渐减少,从10km处的85%左右降低到2km以下的22%左右.与10km处相比,2km处的NO₃^-和SO₄^2-消光系数分别增长3.43倍和2.15倍.杭州污染物质的消光系数具有非常明显的季节变化和日变化特征,硝酸盐表现为夏季较低,冬季较高;硫酸盐表现为秋季高,其他3季相对较低.     

用表面活性剂提高生物滴滤床净化废气中氯苯的性能

A laboratory-scale trickling biofilter column,filled with Raschig rings and inoculated with Pseudomonas putida (ATCC 1785)was used to purify chlorobenzene contained waste gases.Sodium dodecyl sulfonate(SDS)was used to enhance the performance of trickling biofllter.Purification performance of the trickling biofilter was examined for chlorobenzene inlet concentration of 1.20～5.04 g/m~3 at different EBRTs between 76～153 s.Without SDS addition,with simultaneous increase in chlorobenzene inlet loading rate and gas flow rate,100% removal efficiency was achieved at EBRT of 109 s and inlet loadings below 5120 mg/m~3.Addition of SDS to nutrient solution led to improvement of trickling biofilter purification performance. By introducing 25 mg/L SDS,the removal efficiency was increased by 21% and elimination capacity up to 234 g/(m~3.h)was achieved at chlorobenzene inlet loading of 241 g/(m~3.h).Although SDS concentration experienced a low rate reduction after continuous nutrient solution recirculation,this result has little influence on trickling biofilter's removal efficiency in monitoring period.     

废旧聚苯乙烯泡沫制备聚苯乙烯磺酸钠的研究

将废旧泡沫磺化制备聚苯乙烯磺酸及其钠盐,目标产品可以用来作为水处理剂和土壤改良剂。在CHJ-05催化作用和适当的温度下,废旧聚苯乙烯泡沫与浓硫酸进行反应,经分离提纯得到聚苯乙烯磺酸,聚苯乙烯磺酸经中和反应可得聚苯乙烯磺酸钠。反应时间短,磺化效率高。为废旧聚苯乙烯泡沫的再利用及生产低成本的聚苯乙烯磺酸及其钠盐提供了依据。