石墨相氮化碳纳米片负载胱氨酸醌的合成、表征及其对痕量Cd^(2+)和Pb^(2+)的去除

Synthesis and characterization of graphite phase C_(3)N_(4) nanosheets loaded cystinine quinone and its removal on trace Cd^(2+) and Pb^(2+)

制备自组装聚合物——石墨相氮化碳(g-C_(3)N_(4))纳米片负载胱氨酸醌(简写为胱氨酸醌/g-C_(3)N_(4)),采用扫描电子显微镜分析其表面形貌和微观形态,并考察该自组装聚合物对Cd^(2+)和Pb^(2+)的去除效果。结果表明:(1)层叠结构增加了胱氨酸醌/g-C_(3)N_(4)的比表面积,为重金属离子的吸附提供了更多的活性位点。(2)Cd^(2+)和Pb^(2+)的去除率随着胱氨酸醌/g-C_(3)N_(4)中g-C_(3)N_(4)纳米片用量的增加而提升。5 min时,胱氨酸醌/g-C_(3)N_(4)-15(15 mg g-C_(3)N_(4)纳米片负载5 mg胱氨酸醌)对Cd^(2+)和Pb^(2+)的去除率均可达到90%,比胱氨酸醌分别提高了50百分点、24百分点。(3)胱氨酸醌/g-C_(3)N_(4)对Cd^(2+)和Pb^(2+)可实现同步去除。

Self-assembled polymer(graphite phase C_(3)N_(4) nanosheets loaded cystinine quinone(abbreviated as cystine quinone/g-C_(3)N_(4)))was prepared.The surface morphology and micro morphology were analyzed by scanning electron microscope,and the removal effect of the self-assembled polymer on Cd^(2+)and Pb^(2+)was investigated.The results showed that:(1)the specific surface area of cystine quinone/g-C_(3)N_(4) was increased by the laminated structure,and more active sites for the adsorption of heavy metal ions were provided.(2)The removal rates of Cd^(2+)and Pb^(2+)increased with the increase of the amount of graphite phase C_(3)N_(4) nanosheets.At 5 min,the removal rates of Cd^(2+)and Pb^(2+)by cystine quinone/g-C_(3)N_(4)-15(15 graphite phase C_(3)N_(4) nanosheets loaded 5 mg cystine quinone)were 90%,which were 50 percentage points and 24 percentage points higher than cystine quinone respectively.(3)The simultaneous removal of Cd^(2+)and Pb^(2+)could be achieved by cystine quinone/g-C_(3)N_(4).