Imaging Science and Photochemistry ›› 2002, Vol. 20 ›› Issue (2): 100-110.DOI: 10.7517/j.issn.1674-0475.2002.02.100

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ANODIC INHIBITION OF 1-PHENYL-5-MERCAPTOTETRAZOLE AND BENZOTRIAZOLE ON COLLOIDAL PARTICLES OF SILVER AND SILVER SULPHIDE

SHI Yao, YAO Lin-hui, ZHAO Wen-fang, XIA Pei-jie   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P.R.China
  • Received:2001-04-24 Revised:2001-06-27 Online:2002-03-23 Published:2002-03-23

Abstract: In order to investigate the different effects of inhibitors on colloidal particles of silver and silver sulphide,the anodic inhibitions of 1-pheny-l5-mercaptotetrazole (PMT) and benzotriazole (BTA) were examined by physical development catalyzed with Ag and Ag2S particles.The results are shown as follows: 1)that both PMT and BTA gave rise to inhibitions, to some extent,on Ag particles and Ag2S(Ag) particles prepared under slight excess of silver ions,but did not give inhibitions to Ag2S(S) particles prepared in slight excess of sulfur ions because adsorption of the excessive sulfur ions on Ag2S particles was stronger than that of these inhibitors;2)that in the presence of S2O32- and I- ions,the inhibition of BTA on Ag was not only eliminated,but the activity of Ag particles in catalyzing the physical development was even higher than that of Ag without addition of BTA,however,S2O32- and I- ions gave no effects on the inhibition of Ag2S particles with BTA;3)that in the case of PMT,S2O32- and I- ions were not able to eliminate the intibition of PMT on Ag particles,but slightly increased or decreased the inhibitions on Ag2S(Ag) or Ag2S(S),respectively;4)that the measurements of SERS(Surface Enhancement of Raman Spectrometry)confirmed that the inhibition of BTA on Ag particles resulted from the adsorption and disappearance of an inhibition of BTA in the presence of S2O32- and I- ions resulted from the desoption of BTA on Ag particles.All this means the importance of the anodic mechanism for inhibition.

Key words: inhibition, anodic mechanism of inhibition, anti-foggant

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