AgBr纳米簇:PAMAM树形分子模板法制备及光催化性能研究

AgBr Nanoclusters:Preparation by PAMAM Dendrimers as Template and Photocatalytic Property

以酯端基聚酰胺-胺(PAMAM)树形分子为模板,原位制备了AgBr纳米簇。由于酯端基的半代PAMAM树形分子起到“内模板”作用,制得的AgBr纳米簇粒径小、尺寸分布窄、稳定性好,并通过改变Ag+∶PAMAM树形分子的物质的量的比可以精确控制纳米簇的尺寸。AgBr纳米簇/树形分子纳米复合材料在光催化降解甲基橙方面具有很好的催化能力,且随纳米簇的尺寸减小,其催化能力增强。

The dispersed, uniform and well stable AgBr nanoclusters were successfully prepared by esterterminated PAMAM dendrimers as template. The results of TEM images and Brus＇ equation show that the size and morphology of AgBr nanoclusters could be effectively controlled by the molar ratios of Ag^＋：PAMAM dendrimers to meet the demands in different applications. The degradation of methyl oranges was also studied using AgBr nanoclusters with different sizes catalytic activity and the catalyti as the photocatalyst. The AgBr nanoclusters thus prepared showed much better c activity increased with the decrease in the AgBr nanocluster size.