Two new complexes, [W2Ag2S8?Ca(DMF)6]n 1 and [WAgS4?Na(DMF)3]n 2, have been synthesized and characterized. Single-crystal X-ray analyses show both 1 and 2 have {WAgS4}n anion linear chains, but 1 has a discrete [Ca(DM...Two new complexes, [W2Ag2S8?Ca(DMF)6]n 1 and [WAgS4?Na(DMF)3]n 2, have been synthesized and characterized. Single-crystal X-ray analyses show both 1 and 2 have {WAgS4}n anion linear chains, but 1 has a discrete [Ca(DMF)6]2+ cation while 2 is a linear chain. UV-Visible-Near-IR spectroscopy data show that the bandgaps of the two complexes are 1.86 and 1.99 eV, respectively. Electrical conductivity measurements reveal the conductivities of 1 and 2 are 10?7 and 10?8 Scm?1, respectively and they exhibit thermally activated temperature depen- dence, which may be attributed to semiconductors.展开更多
Devising S-scheme heterostructure is considered as a cutting-edge strategy for advanced photocatalysts with effectively segregated photo-carriers and prominent redox potential for emerging organic pollutants control.H...Devising S-scheme heterostructure is considered as a cutting-edge strategy for advanced photocatalysts with effectively segregated photo-carriers and prominent redox potential for emerging organic pollutants control.Herein,an S-scheme Ag_(2)CO_(3)/C_(3)N_(5) heterojunction photocatalyst was developed via a simple in situ chemical deposition procedure,and further photoreduction operation made metallic Ag(size:3.5–12.5 nm)being in situ formed on Ag_(2)CO_(3)/C_(3)N_(5) for a plasmonic S-scheme Ag/Ag_(2)CO_(3)/C_(3)N_(5) heterojunction photocatalyst.Consequently,Ag/Ag_(2)CO_(3)/C_(3)N_(5) manifests pronouncedly upgraded photocatalytic performance toward oxytetracycline degradation with a superior photoreaction rate constant of 0.0475 min‒1,which is 13.2,3.9 and 2.2 folds that of C_(3)N_(5),Ag_(2)CO_(3),and Ag_(2)CO_(3)/C_(3)N_(5),respectively.As evidenced by comprehensive characterizations and density functional theory calculations,the localized surface plasmon resonance effect of metallic Ag and the unique S-scheme charge transfer mechanism in 0D/0D/2D Ag/Ag_(2)CO_(3)/C_(3)N_(5) collaboratively strengthen the visible-light absorption,and facilitate the effective separation of powerful charge carriers,thereby significantly promoting the generation of reactive species like·OH^(-),h^(+)and·O_(2)^(-)for efficient oxytetracycline destruction.Moreover,four consecutive cycles demonstrate the reusability of Ag/Ag_(2)CO_(3)/C_(3)N_(5).Furthermore,the authentic water purification tests affirm its practical application potential.This work not only provides a candidate strategy for advancing S-scheme heterojunction photocatalysts but also makes a certain contribution to water decontamination.展开更多
本文采用Mn^2＋掺杂和组装壳等技术,以变性牛血清白蛋白（d BSA）为稳定剂,探索水相合成新型掺杂-核壳结构Ag In S2：Mn@Zn S量子点的方法。工作中以产物的荧光和磷光强度为指标,通过考察Mn^2＋和Zn的用量、反应的气氛、p H值、温度和...本文采用Mn^2＋掺杂和组装壳等技术,以变性牛血清白蛋白（d BSA）为稳定剂,探索水相合成新型掺杂-核壳结构Ag In S2：Mn@Zn S量子点的方法。工作中以产物的荧光和磷光强度为指标,通过考察Mn^2＋和Zn的用量、反应的气氛、p H值、温度和时间来优化Ag In S2：Mn@Zn S量子点的合成条件。用扫描隧道显微镜、X射线粉末衍射等技术对量子点的形貌、结构进行了表征。结果表明,该量子点的直径为9^11nm,量子产率为43.2%。用荧光光谱等方法研究了其光致发光性能,并应用于对胰蛋白酶的选择性识别。展开更多
基金This research was supported by the State Key Laboratory of Structural Chemistry, the National Science and Technology of China (001CB1089), the Chinese Academy of Sciences (CAS), the National Science Foundation of China (20273073, 20333070, 90206040)
文摘Two new complexes, [W2Ag2S8?Ca(DMF)6]n 1 and [WAgS4?Na(DMF)3]n 2, have been synthesized and characterized. Single-crystal X-ray analyses show both 1 and 2 have {WAgS4}n anion linear chains, but 1 has a discrete [Ca(DMF)6]2+ cation while 2 is a linear chain. UV-Visible-Near-IR spectroscopy data show that the bandgaps of the two complexes are 1.86 and 1.99 eV, respectively. Electrical conductivity measurements reveal the conductivities of 1 and 2 are 10?7 and 10?8 Scm?1, respectively and they exhibit thermally activated temperature depen- dence, which may be attributed to semiconductors.
文摘Devising S-scheme heterostructure is considered as a cutting-edge strategy for advanced photocatalysts with effectively segregated photo-carriers and prominent redox potential for emerging organic pollutants control.Herein,an S-scheme Ag_(2)CO_(3)/C_(3)N_(5) heterojunction photocatalyst was developed via a simple in situ chemical deposition procedure,and further photoreduction operation made metallic Ag(size:3.5–12.5 nm)being in situ formed on Ag_(2)CO_(3)/C_(3)N_(5) for a plasmonic S-scheme Ag/Ag_(2)CO_(3)/C_(3)N_(5) heterojunction photocatalyst.Consequently,Ag/Ag_(2)CO_(3)/C_(3)N_(5) manifests pronouncedly upgraded photocatalytic performance toward oxytetracycline degradation with a superior photoreaction rate constant of 0.0475 min‒1,which is 13.2,3.9 and 2.2 folds that of C_(3)N_(5),Ag_(2)CO_(3),and Ag_(2)CO_(3)/C_(3)N_(5),respectively.As evidenced by comprehensive characterizations and density functional theory calculations,the localized surface plasmon resonance effect of metallic Ag and the unique S-scheme charge transfer mechanism in 0D/0D/2D Ag/Ag_(2)CO_(3)/C_(3)N_(5) collaboratively strengthen the visible-light absorption,and facilitate the effective separation of powerful charge carriers,thereby significantly promoting the generation of reactive species like·OH^(-),h^(+)and·O_(2)^(-)for efficient oxytetracycline destruction.Moreover,four consecutive cycles demonstrate the reusability of Ag/Ag_(2)CO_(3)/C_(3)N_(5).Furthermore,the authentic water purification tests affirm its practical application potential.This work not only provides a candidate strategy for advancing S-scheme heterojunction photocatalysts but also makes a certain contribution to water decontamination.
文摘本文采用Mn^2＋掺杂和组装壳等技术,以变性牛血清白蛋白（d BSA）为稳定剂,探索水相合成新型掺杂-核壳结构Ag In S2：Mn@Zn S量子点的方法。工作中以产物的荧光和磷光强度为指标,通过考察Mn^2＋和Zn的用量、反应的气氛、p H值、温度和时间来优化Ag In S2：Mn@Zn S量子点的合成条件。用扫描隧道显微镜、X射线粉末衍射等技术对量子点的形貌、结构进行了表征。结果表明,该量子点的直径为9^11nm,量子产率为43.2%。用荧光光谱等方法研究了其光致发光性能,并应用于对胰蛋白酶的选择性识别。
