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Evaluation of Intrinsic Ionization and Complexation Constants of TiO2 and Mg-Fe Hydrotalcite-like Compounds
  • ISSN号:1001-604X
  • 期刊名称:《中国化学:英文版》
  • 时间:0
  • 分类:O641.4[理学—物理化学;理学—化学]
  • 作者机构:[1]Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan, Shandong 250100, China, [2]Environment Research Institute, Shandong University, Jinan, Shandong 250100, China, [3]Department of Mechanical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L3G1, Canada
  • 相关基金:Project supported by the National Key Basic Research Program of China (No. 2004CB418504), the National Natural Science Foundation of China (Nos. 20273041 and 20573065) and the Natural Science Foundation of Shandong Province of China (No. Z2005B02).
中文摘要:

内在的表面反应常数, pKinta1, pKinta2, p *KintC 和 p *KintA,没有结构的充电和 Mg-Fe 象 hydrotalcite 一样混合物(HTlc ) ,被修改双推测(MDE ) 分别地与结构的充电为 TiO2 评估。为 TiO2 的常数与班获得的那些相比的内在的表面反应的结果在文学加倍推测(CDE ) 。而且, MDE 获得的内在的表面反应常数的价值被用来模仿材料的收费行为。下列结论被获得。为没有结构的充电的 TiO2, MDE 评估的 pKinta1 和 pKinta2 等于由 CDE 的那些,然而, p *KintC 和 p *KintA 由 MDE 评估了与由 CDE 的那些不同。原则上, *KintC 和 p *KintA 由 MDE 评估了的 p 的结果是比由 CDE 的那些更精确的。MDE 获得的内在的表面反应常数的价值能最优地与三倍的层模型(TLM ) 一起为 TiO2 模仿收费曲线。为有积极结构的充电的 HTlc, *KintC =0 和 *KintA 的结果被 MDE 获得,它意味着惰性的电解质化学药品绑定不存在;c独立的零网费用( PZNC )的点没有结构的充电,也作为与固体一样存在,并且酸硷的滴定获得的 pHPZNC 能最优地被模仿,控告趋势的表面能用 MDE 和弥漫的层模型( DLM )评估的 pKinta1 和 pKinta2 在很大程度上被模仿。

英文摘要:

The intrinsic surface reaction constants, pKa1^int, pKa2^int, p^*KC^int and p^*KA^int , were evaluated by a modifieddouble extrapolation (MDE) for TiO2 without structural charge and Mg-Fe hydrotalcite-like compounds (HTlc) with structural charge, respectively. The results of intrinsic surface reaction constants for TiO2 were compared with those obtained by class double extrapolation (CDE) in literature. Furthermore, the values of intrinsic surface reaction constants obtained by MDE were used to simulate the charging behaviors of the materials. The following conclusions were obtained. For TiO2 without structural charge, the pKa1^int and pKa2^int evaluated by MDE are equal to those by CDE, however the p^*KC^int and p^*KA^int evaluated by MDE are much different from those by CDE. In principle, the results of the p^*KC^int and p^*KA^int evaluated by MDE are more accurate than those by CDE. The values of intrinsic surface reaction constants obtained by MDE can excellently simulate the charging curves for TiO2 with the triple layer model (TLM). For HTlc with positive structural charge, the results of ^*KC^int=0 and ^*KA^int →∞ were obtained by MDE, which means the inert electrolyte chemical binding does not exist; the point of zero net charge (PZNC) of c-independence also exist as the same as solid without structural charge, and the PHPZNC obtained by the acid-base titration can excellently be simulated and the surface charging tendency can be simulated to a great extent using the pKa1^int and pKa2^int evaluated by MDE and the diffuse layer model (DLM).

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期刊信息
  • 《中国化学:英文版》
  • 主管单位:
  • 主办单位:中国化学会
  • 主编:
  • 地址:上海市枫林路354号中科院上海有机化学研究所
  • 邮编:200032
  • 邮箱:
  • 电话:021-54925243
  • 国际标准刊号:ISSN:1001-604X
  • 国内统一刊号:ISSN:31-1547/O6
  • 邮发代号:4-646
  • 获奖情况:
  • 中国期刊方阵“双高”期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国科学引文索引(扩展库),日本日本科学技术振兴机构数据库,英国英国皇家化学学会文摘
  • 被引量:175