The appearance of yellow color indicates the formation of small silver particles.介绍楼主一篇文献。Younan Xia组的……Rapid synthesis of small silver nanocubes by mediating polyol reduction with a trace amount of sodium sulfide or sodium hydrosulfide2HOCH2CH2OH→2CH3CHO+2H2O2Ag++2CH3CHO→CH3CO?OCCH3+2Ag+2H+http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2390781/题主自己慢慢看吧没做过实验，不过首先要考虑杂质的影响，
