Synthesis and Antibacterial Activity of Silver-histidine Complex Doped Montmorillonite Antibacterial Agent

doi:10.7503/cjcu20120460

Abstract

Abstract:

A novel colorless salt-tolerant silver-histidine complex doped montmorillonite antibacterial agent(SHMMT) powder was synthesized by hydrothermal ion exchange reaction using silver-histidine complex ion [Ag(His)]⁺ as precursor. The product was characterized by inductively coupled plasma spectrometer(ICP), powder X-ray diffractometer(XRD) and thermogravimetric-differential temperature analyser(TG-DTA). The antibacterial activity of SHMMT against Pseudoalteromonas carrageenovora was examined by a modified broth dilution test and the plate counting method. The salt-tolerant and slow-releasing properties of SHMMT were tested by sea water soaking method. The results show that the amount of Ag loaded on SHMMT powder reaches 1.7 mmol/g when the molar ratio of silver to histidine equals 1: 1, which is much more than the cationic exchange capacity(cec) of Na-MMT. SHMMT powder is pile white and has high bacterial activity. After being soaked in the sea water for 45 d, the bactericidal rate of the SHMMT powder still reaches 80%.

Key words: Montmorillonite, Silver-histidine complex, Antibacterial activity, Salt-tolerant abilit

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DUAN Shu-E, ZHAI Yun-Hui, QU Ying-Juan, MA Ming-Yang. Synthesis and Antibacterial Activity of Silver-histidine Complex Doped Montmorillonite Antibacterial Agent[J]. Chem. J. Chinese Universities, 2012, 33(12): 2617.

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Synthesis and Antibacterial Activity of Silver-histidine Complex Doped Montmorillonite Antibacterial Agent

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