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硫化物沉淀和电极制备配制0.1克分子/升AgNO_3和0.1克分子/升Cu(No_3)_2溶液。取14体积的银盐溶液和3体积的铜盐溶液混合,在搅拌下将此混合液徐徐加入稍过量的Na_2S溶液中。即有Ag_S-CuS共沉淀生成。注意一定将银和铜盐混合液加入Na_2 S中,避免Ag_2S优先沉淀。将上述沉淀放置约1小时,倒掉上面清液,加入新鲜去离子水,将此泥浆煮沸1-2小时,用热去离子水洗几次,再用稀硝酸洗数次,冷去离子水洗多次,过滤沉淀,在真空中干燥。将Ag_2S-CuS共沉淀粉末在特制不锈钢模中压成厚约1.5m/m的圆片。抛光压好之膜片,用10_(-1)MEDTA溶液浸泡两昼夜,处理好的膜片用两只橡皮圈装于具有良好
Sulfide precipitation and electrode preparation A solution of 0.1 mol / L AgNO 3 and 0.1 mol / L Cu (No 3) 2 solution was prepared. Take 14 volumes of silver salt solution and 3 volumes of copper salt solution mixing, the mixture was slowly added to a slight excess of Na 2 S solution. Ag_S-CuS coprecipitation. Be sure to add a mixture of silver and copper salts to Na2S to avoid preferential precipitation of Ag2S. The precipitate was left for about 1 hour, the supernatant was drained, fresh deionized water was added, the slurry was boiled for 1-2 hours, washed with hot deionized water several times, washed with dilute nitric acid several times, cold deionized water washed The precipitate was filtered and dried in vacuo. The Ag_2S-CuS coprecipitated powder in a special stainless steel mold pressed into a wafer thickness of about 1.5m / m. Polishing the pressure of the diaphragm, with 10 _ (- 1) MEDTA solution for two days and nights, the treated diaphragm with two rubber bands fitted with good