利用 TG、DTA和变温 IR研究了具有 Keggin结构的稀土钼钒三元杂多配合物 K7H2 L n Mo6 V6 O39·x H2 O( L n=L a,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,下同 )和 K9HL n Mo5V7O39· x H2 O的热解范围 ;利用酸碱滴定及紫外光谱法确定了它们...利用 TG、DTA和变温 IR研究了具有 Keggin结构的稀土钼钒三元杂多配合物 K7H2 L n Mo6 V6 O39·x H2 O( L n=L a,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,下同 )和 K9HL n Mo5V7O39· x H2 O的热解范围 ;利用酸碱滴定及紫外光谱法确定了它们在水溶液中存在的 p H范围 ,并讨论了这些配合物在水溶液中酸解及碱解的反应机理。展开更多
Overbased lubricant detergents are important components in lubricating oil. Recently, a lot of papers about the synthesis mechanism, colloidal structure, acid neutralization and antifrictiorL properties of overbased d...Overbased lubricant detergents are important components in lubricating oil. Recently, a lot of papers about the synthesis mechanism, colloidal structure, acid neutralization and antifrictiorL properties of overbased detergents have been published with the development of experimental techniques, which can help us better understand the process of preparation and application of overbased detergents and propound new strategies for improving various performances of overbased detergents. In the future, the synthesis of environmentally friendly and multi-functional lubricant detergent using biodegradable vegetable oil instead of mineral oil as raw materials will be a primary objective for the colloidal lubricant detergent industry.This paper mainly presents the latest advances in the investigation of colloidal lubricant detergents.展开更多
The factors and mechanisms of oxidative degradation of three organophosphorus pesticides （dichlorvos, methamidophos and phoxim） were studied with sodium percarbonate （SPC） as a solid oxidant. The result showed tha...The factors and mechanisms of oxidative degradation of three organophosphorus pesticides （dichlorvos, methamidophos and phoxim） were studied with sodium percarbonate （SPC） as a solid oxidant. The result showed that SPC has highly activity in degrading these organophosphous pesticides. The most efficient degradation of pesticides occurred under basic conditions and the degradation rates increased with time extension and high temperature. The degradation of organophosphorus pesticides was expected to get even better results at lower initial concentration. Furthermore, we analyzed the intermediate products by NMP, spectrometry. On the basis of the analytical result, the oxidative degradation mechanism was proposed for each organophosphous pesticide. It is significant to understand the environment chemistry of organophosphorus pesticides in environmental system.展开更多
文摘利用 TG、DTA和变温 IR研究了具有 Keggin结构的稀土钼钒三元杂多配合物 K7H2 L n Mo6 V6 O39·x H2 O( L n=L a,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,下同 )和 K9HL n Mo5V7O39· x H2 O的热解范围 ;利用酸碱滴定及紫外光谱法确定了它们在水溶液中存在的 p H范围 ,并讨论了这些配合物在水溶液中酸解及碱解的反应机理。
文摘Overbased lubricant detergents are important components in lubricating oil. Recently, a lot of papers about the synthesis mechanism, colloidal structure, acid neutralization and antifrictiorL properties of overbased detergents have been published with the development of experimental techniques, which can help us better understand the process of preparation and application of overbased detergents and propound new strategies for improving various performances of overbased detergents. In the future, the synthesis of environmentally friendly and multi-functional lubricant detergent using biodegradable vegetable oil instead of mineral oil as raw materials will be a primary objective for the colloidal lubricant detergent industry.This paper mainly presents the latest advances in the investigation of colloidal lubricant detergents.
文摘The factors and mechanisms of oxidative degradation of three organophosphorus pesticides （dichlorvos, methamidophos and phoxim） were studied with sodium percarbonate （SPC） as a solid oxidant. The result showed that SPC has highly activity in degrading these organophosphous pesticides. The most efficient degradation of pesticides occurred under basic conditions and the degradation rates increased with time extension and high temperature. The degradation of organophosphorus pesticides was expected to get even better results at lower initial concentration. Furthermore, we analyzed the intermediate products by NMP, spectrometry. On the basis of the analytical result, the oxidative degradation mechanism was proposed for each organophosphous pesticide. It is significant to understand the environment chemistry of organophosphorus pesticides in environmental system.
