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Study on the chemisorption kinetics of Methylene Blue using SERS technique
作者姓名:陈万喜  蒋化  徐铸德  陆云
作者单位:Department of Chemistry,Zhejiang University,Hangzhou,Zhejiang 310027,China,Department of Chemistry,Zhejiang University,Hangzhou,Zhejiang 310027,China,Department of Chemistry,Zhejiang University,Hangzhou,Zhejiang 310027,China,Department of Polymer Science and Engineering,Nanjing University,Nanjing,Jiangsu 210093,China
基金项目:Project (No. 29273127) supported by the National Natural Science Foundation of China
摘    要:SERS technique was used to study the chemisorption kinetics of Methylene Blue (MB) on the HNO3-etched silver surface. The adsorption kinetic parameters were deduced from different vibrational modes at a low concentration of 3.5×10-6 mol/L, and it showed that MB adsorbed uniformly (monolayerly) on silver surface. However, the adsorptive behavior turned anomalous at relatively higher concentrations and a possible explanation was suggested. In addition, the influence of Cl- ions on the adsorption states of MB was investigated, and it was shown that MB molecules, adsorbed on the silver surface, tended to transform from the "lying-down" state to the "end- on"4 state after Cl- ions were added.


Study on the chemisorption kinetics of Methylene Blue using SERS technique
CHEN,Wan-Xi JIANG,HuaXU,Zhu-De LU,Yun.Study on the chemisorption kinetics of Methylene Blue using SERS technique[J].Chinese Journal of Chemistry,1999,17(2):125-131.
Authors:CHEN  Wan-Xi JIANG  HuaXU  Zhu-De LU  Yun
Institution:CHEN,Wan-Xi JIANG,HuaXU,Zhu-De LU,YunDepartment of Chemistry,Zhejiang University,Hangzhou,Zhejiang 310027,China Department of Polymer Science and Engineering,Nanjing University,Nanjing,Jiangsu 210093,China
Abstract:SERS technique wae used to study the chemiesorption kinetics of Methylene Blue (MB) on the HNO3-etched silver surface. The adsorption kinetic parameters were deduced from different vibrational modes at a low concentration of 3.5 × 10?6 mol/L, and it showed that MB adsorbed uniformly (monolayerly) on silver surface. However, the adsorptive behavior turned anomalous at relatively higher concentrations and a possible explanation was suggested. In addition, the influence of Cl? ions on the adsorption states of MB was investigated, and it was shown that MB molecules, adsorbed on the silver surface, tended to transform the “lying-down” state to the “end - on” 4 state after CI? ions were added.
Keywords:Methylene Blue  silver surface  chemisorption kinetics  adsorption state  surface-enhanced Raman spectroscopy (SERS)
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