Highly luminescent colloidal nanocrystals have wide applications in bioimaging and various optoelectronic devices.Herein we report a facile and mild procedure by combining S2-treatment and binary ligand passivation,wh...Highly luminescent colloidal nanocrystals have wide applications in bioimaging and various optoelectronic devices.Herein we report a facile and mild procedure by combining S2-treatment and binary ligand passivation,which can efficiently enhance the luminescent property of CdSe nanocrystals at room temperature.The photoluminescence quantum yield of as-treated CdSe nanocrystals exhibits drastic enhancement(e.g.,188 times for CdSe nanorods)after this dual-passivation treatment.The methodology proposed here can be applied to various CdSe nanocrystals,regardless of their sizes,shapes,and crystal structures.展开更多
针对超高含硫气田碱性采出水的特性和处理应达到的要求,对水质改性、氮气气浮、H2O2预氧化、沉淀复合除硫加絮凝净化处理工艺技术进行了研究。结果表明：当盐酸投加量为2.0~2.5 m L/L,p H控制6.0~6.5,溶气比控制为20∶1,气浮初级除硫可...针对超高含硫气田碱性采出水的特性和处理应达到的要求,对水质改性、氮气气浮、H2O2预氧化、沉淀复合除硫加絮凝净化处理工艺技术进行了研究。结果表明：当盐酸投加量为2.0~2.5 m L/L,p H控制6.0~6.5,溶气比控制为20∶1,气浮初级除硫可将硫离子质量浓度由2 500 mg/L降至400 mg/L,后续H2O2投加量2.5~3.0 m L/L,最佳反应时间15 min,20%沉淀除硫剂ZS-1投加量为2.0 m L/L,20%絮凝剂L-12、0.1%PAM投加量均为1.0 m L/L时,处理水质可达到回注设计要求。展开更多
基金financial support from the National Natural Science Foundation of China (NSFC,Nos.21872038 and 21733003)MOST (No.2017YFA0207303)Key Basic Research Program of Science and Technology Commission of Shanghai Municipality (No.17JC1400100)
文摘Highly luminescent colloidal nanocrystals have wide applications in bioimaging and various optoelectronic devices.Herein we report a facile and mild procedure by combining S2-treatment and binary ligand passivation,which can efficiently enhance the luminescent property of CdSe nanocrystals at room temperature.The photoluminescence quantum yield of as-treated CdSe nanocrystals exhibits drastic enhancement(e.g.,188 times for CdSe nanorods)after this dual-passivation treatment.The methodology proposed here can be applied to various CdSe nanocrystals,regardless of their sizes,shapes,and crystal structures.
文摘针对超高含硫气田碱性采出水的特性和处理应达到的要求,对水质改性、氮气气浮、H2O2预氧化、沉淀复合除硫加絮凝净化处理工艺技术进行了研究。结果表明：当盐酸投加量为2.0~2.5 m L/L,p H控制6.0~6.5,溶气比控制为20∶1,气浮初级除硫可将硫离子质量浓度由2 500 mg/L降至400 mg/L,后续H2O2投加量2.5~3.0 m L/L,最佳反应时间15 min,20%沉淀除硫剂ZS-1投加量为2.0 m L/L,20%絮凝剂L-12、0.1%PAM投加量均为1.0 m L/L时,处理水质可达到回注设计要求。
