Citation: ZHANG Wei-Min, YANG Zhen-Dong, LIU Jia, SUN Zhong-Xi. Determination of Acid-Base Equilibrium Constants on Aqueous Mesoporous Silica Surfaces[J]. Acta Physico-Chimica Sinica, ;2010, 26(08): 2109-2114. doi: 10.3866/PKU.WHXB20100801 shu

Determination of Acid-Base Equilibrium Constants on Aqueous Mesoporous Silica Surfaces

1.
School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China

Received Date: 10 March 2010
Available Online: 18 May 2010
Fund Project: 国家自然科学基金(20677022)资助项目 (20677022)

We used the potentiometric titration technique to study the deprotonation reactions at aqueous mesoporous silica surfaces. The concentration of surface proton binding sites was obtained by the Gran plot method using the acid-base titration data. The relevant equilibrium constants of the surfaces in terms of the constant capacitance model (CCM) were determined based on the experimental results using the FITEQL 4.0 program. The results indicate that the surface deprotonation behavior of the mesoporous silica suspensions is significantly different from that of amorphous silica. This behavior can be described by two surface reactions with surface bidentate and monodentate deprotonation constants of pK_a1=6.78±0.15 and pK_a2=10.25±0.22, respectively. Using these deprotonation constants, we established a surface speciation diagram for mesoporous silica in aqueous suspensions as a function of pH and discussed the effect of surface capacitance on surface speciation.
- Equilibrium constant,
- Mesoporous silica,
- Surface,
- Acid-base reaction,
- Constant capacitance
1. [1]
  
  [1]. Kresge, C. T.; Leonowicz, M. E.; Roth, W. J.; Vartuli, J. C.; Beck, J. S. Nature, 1992, 359: 710
2. [2]
  [2]. Zhang, D. Q.; Wan, Y.; Li, H. X. Acta Chim. Sin., 2006, 64: 894 [张蝶青, 万颖, 李和兴. 化学学报, 2006, 64: 894]
3. [3]
  [3]. Li, J. S.; Gu, J.; Xia, M. Y.; Yuan, J. F.; Sun, X. Y.; Wang, L. J. Acta Chim. Sin., 2008, 66:2305. [李健生, 顾娟, 夏敏亚, 袁金芳, 孙秀云, 王连军. 化学学报, 2008, 66: 2305]
4. [4]
  [4]. Zhang, H.; Wu, J.; Zhou, L.; Zhang, D.; Qi, L. Langmuir, 2007, 23: 1107
5. [5]
  [5]. Schindler, P. W.; Kamber, H. R. Helv. Chim. Acta, 1968, 51: 1781
6. [6]
  [6]. Du, Q.; Sun, Z.; Willis, F.; Tang, H. X. J. Colloid Interface Sci., 1997, 187: 221
7. [7]
  [7]. Wang, Y.; Du, B.; Dou, X.; Liu, J; Shi, B.; Wang, D.; Tang, H. Colloids and Surface A, 2007, 307: 16
8. [8]
  [8]. Shen, Z.; Zhou, S.; Pei, S. Estuarine, Coastal and Shelf Science, 2008, 78: 481
9. [9]
  [9]. Herbelin, A.; Westall, J. C. FITEQL ver 4.0. Corvallis, OR: Department of Chemistry, Ore n State, 1999
10. [10]
  [10]. Pan, J.; Liu, R.; Tang, H. J. Environmental Sci., 2007, 19: 403
11. [11]
  [11]. Sun, Z. X.; Guo, S. Y. Chem. J. Chin. Univ., 2006, 27:1351. [孙中溪, 郭淑云. 高等学校化学学报, 2006, 27: 1351]
12. [12]
  [12]. Huang, C.; Stumm, W. J. Colloid Interface Sci., 1973, 43: 409
13. [13]
  [13]. Schindler, P. W.; Fürst, B.; Dick, R.; Wolf, P. U. J. Colloid Interface Sci., 1976, 55: 469
14. [14]
  [14]. Davydov, V. Y.; Kiselev, A. V.; Zhuravlev, L. T. Trans. Faraday Soc., 1964, 60: 2254
15. [15]
  [15]. Lützenkirchen, J.; Boily, J. F.; Lovgren, L.; Sjoberg, S. Geochimica et Cosmochimica Acta, 2002, 66: 3389
16. [16]
  [16]. Charlet, I.; Schindler, P. W.; Spadini, L.; Furrer, G.; Zysset, M. Aquatic Science, 1993, 55: 291
17. [17]
  [17]. Jordan, N.; Marmier, N.; Lomenech, C.; Giffaut, E.; Ehrhardt, J. J. J. Colloid Interface Sci., 2007, 312: 224
18. [18]
  [18]. Puigdomenech, I. MEDUSA ver 2.0. Stockholm, Sweden: Royal Institute of Technology, 1999
19. [19]
  [19]. Lützenkirchen, J. J. Colloid Interface Sci., 1999, 210: 384
20. [20]
  [20]. Lagerstrom, G. Acta Chem. Scand., 1959, 13: 722
1. [1]
  Xiaowu Zhang , Pai Liu , Qishen Huang , Shufeng Pang , Zhiming Gao , Yunhong Zhang . Acid-Base Dissociation Equilibrium in Multiphase System: Effect of Gas. University Chemistry, 2024, 39(4): 387-394. doi: 10.3866/PKU.DXHX202310021
2. [2]
  Ruilin Han , Xiaoqi Yan . Comparison of Multiple Function Methods for Fitting Surface Tension and Concentration Curves. University Chemistry, 2024, 39(7): 381-385. doi: 10.3866/PKU.DXHX202311023
3. [3]
  Zhaomei LIU , Wenshi ZHONG , Jiaxin LI , Gengshen HU . Preparation of nitrogen-doped porous carbons with ultra-high surface areas for high-performance supercapacitors. Chinese Journal of Inorganic Chemistry, 2024, 40(4): 677-685. doi: 10.11862/CJIC.20230404
4. [4]
  Heng Zhang . Determination of All Rate Constants in the Enzyme Catalyzed Reactions Based on Michaelis-Menten Mechanism. University Chemistry, 2024, 39(4): 395-400. doi: 10.3866/PKU.DXHX202310047
5. [5]
  Limin Shao , Na Li . A Unified Equation Derived from the Charge Balance Equation for Constructing Acid-Base Titration Curve and Calculating Endpoint Error. University Chemistry, 2024, 39(11): 365-373. doi: 10.3866/PKU.DXHX202401086
6. [6]
  Shuying Zhu , Shuting Wu , Ou Zheng . Improvement and Expansion of the Experiment for Determining the Rate Constant of the Saponification Reaction of Ethyl Acetate. University Chemistry, 2024, 39(4): 107-113. doi: 10.3866/PKU.DXHX202310117
7. [7]
  Bing LIU , Huang ZHANG , Hongliang HAN , Changwen HU , Yinglei ZHANG . Visible light degradation of methylene blue from water by triangle Au@TiO₂ mesoporous catalyst. Chinese Journal of Inorganic Chemistry, 2024, 40(5): 941-952. doi: 10.11862/CJIC.20230398
8. [8]
  Yuanpei ZHANG , Jiahong WANG , Jinming HUANG , Zhi HU . Preparation of magnetic mesoporous carbon loaded nano zero-valent iron for removal of Cr(Ⅲ) organic complexes from high-salt wastewater. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1731-1742. doi: 10.11862/CJIC.20240077
9. [9]
  Tong Zhou , Jun Li , Zitian Wen , Yitian Chen , Hailing Li , Zhonghong Gao , Wenyun Wang , Fang Liu , Qing Feng , Zhen Li , Jinyi Yang , Min Liu , Wei Qi . Experiment Improvement of “Redox Reaction and Electrode Potential” Based on the New Medical Concept. University Chemistry, 2024, 39(8): 276-281. doi: 10.3866/PKU.DXHX202401005
10. [10]
  Ji-Quan Liu , Huilin Guo , Ying Yang , Xiaohui Guo . Calculation and Discussion of Electrode Potentials in Redox Reactions of Water. University Chemistry, 2024, 39(8): 351-358. doi: 10.3866/PKU.DXHX202401031
11. [11]
  Chuanming GUO , Kaiyang ZHANG , Yun WU , Rui YAO , Qiang ZHAO , Jinping LI , Guang LIU . Performance of MnO₂-0.39IrO_x composite oxides for water oxidation reaction in acidic media. Chinese Journal of Inorganic Chemistry, 2024, 40(6): 1135-1142. doi: 10.11862/CJIC.20230459
12. [12]
  Honglian Liang , Xiaozhe Kuang , Fuping Wang , Yu Chen . Exploration and Practice of Integrating Ideological and Political Education into Physical Chemistry: a Case on Surface Tension and Gibbs Free Energy. University Chemistry, 2024, 39(10): 433-440. doi: 10.12461/PKU.DXHX202405073
13. [13]
  Zizheng LU , Wanyi SU , Qin SHI , Honghui PAN , Chuanqi ZHAO , Chengfeng HUANG , Jinguo PENG . Surface state behavior of W doped BiVO₄ photoanode for ciprofloxacin degradation. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 591-600. doi: 10.11862/CJIC.20230225
14. [14]
  Xinlong WANG , Zhenguo CHENG , Guo WANG , Xiaokuen ZHANG , Yong XIANG , Xinquan WANG . Enhancement of the fragile interface of high voltage LiCoO₂ by surface gradient permeation of trace amounts of Mg/F. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 571-580. doi: 10.11862/CJIC.20230259
15. [15]
  Weihan Zhang , Menglu Wang , Ankang Jia , Wei Deng , Shuxing Bai . 表面硫物种对钯-硫纳米片加氢性能的影响. Acta Physico-Chimica Sinica, 2024, 40(11): 2309043-. doi: 10.3866/PKU.WHXB202309043
16. [16]
  Zhuomin Zhang , Hanbing Huang , Liangqiu Lin , Jingsong Liu , Gongke Li . Course Construction of Instrumental Analysis Experiment: Surface-Enhanced Raman Spectroscopy for Rapid Detection of Edible Pigments. University Chemistry, 2024, 39(2): 133-139. doi: 10.3866/PKU.DXHX202308034
17. [17]
  Yukai Jiang , Yihan Wang , Yunkai Zhang , Yunping Wei , Ying Ma , Na Du . Characterization and Phase Diagram of Surfactant Lyotropic Liquid Crystal. University Chemistry, 2024, 39(4): 114-118. doi: 10.3866/PKU.DXHX202309033
18. [18]
  Lan Ma , Cailu He , Ziqi Liu , Yaohan Yang , Qingxia Ming , Xue Luo , Tianfeng He , Liyun Zhang . Magical Surface Chemistry: Fabrication and Application of Oil-Water Separation Membranes. University Chemistry, 2024, 39(5): 218-227. doi: 10.3866/PKU.DXHX202311046
19. [19]
  Endong YANG , Haoze TIAN , Ke ZHANG , Yongbing LOU . Efficient oxygen evolution reaction of CuCo₂O₄/NiFe-layered bimetallic hydroxide core-shell nanoflower sphere arrays. Chinese Journal of Inorganic Chemistry, 2024, 40(5): 930-940. doi: 10.11862/CJIC.20230369
20. [20]
  Congying Lu , Fei Zhong , Zhenyu Yuan , Shuaibing Li , Jiayao Li , Jiewen Liu , Xianyang Hu , Liqun Sun , Rui Li , Meijuan Hu . Experimental Improvement of Surfactant Interface Chemistry: An Integrated Design for the Fusion of Experiment and Simulation. University Chemistry, 2024, 39(3): 283-293. doi: 10.3866/PKU.DXHX202308097

Get Citation

PDF

XML

Metrics

PDF Downloads(1434)
Abstract views(4197)
HTML views(21)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142