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In this study, poly(4‐aminophenol) was successfully prepared by an enzymatic reaction in water, with its molecular weights ranging from 12,000 to 52,000. The polymerization of 4‐aminophenol produced high yields over a wide pH ranging from 4 to 10. In addition, poly(4‐aminophenol) was also used for silver‐ion adsorption because it was composed of amino and hydroxyl groups. We found that the adsorption...
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