Constructing the stable,low-cost,efficient,and highly adaptable visible light-driven photocatalyst to implement the synergistic effect of photocatalysis and adsorption has been excavated a promising strategy to deal w...Constructing the stable,low-cost,efficient,and highly adaptable visible light-driven photocatalyst to implement the synergistic effect of photocatalysis and adsorption has been excavated a promising strategy to deal with antibiotic pollution in water bodies.Herein,a novel 3 D ternary Z-scheme heterojunction photocatalyst Ni_(2)P/Bi_(2)MoO_(6)/g-C_(3)N_(4)(Ni_(2)P/BMO/CN)was fabricated by a simple solvothermal method in which the broad spectrum antibiotics(mainly tetracyclines and supplemented by quinolones)were used as target pollution sources to evaluate its adsorption and photocatalytic performance.Notably,the Zscheme composite significantly exhibit the enhancement for degradation efficiency of tetracycline and other antibiotic by using Ni_(2)P nanoparticles as electron conductor.Active species capture experiment and electron spin resonance(ESR)technology reveal the mechanism of Z-scheme Ni_(2)P/BMO/CN photocatalytic reaction in detail.In addition,based on the identification of intermediates by liquid chromatography–mass spectroscopy(LC–MS),the possible photocatalytic degradation pathways of TC were proposed.展开更多
The construction of built-in electric field is generally considered as an effective strategy to enhance photocatalytic performance due to its significant role in charge separation.Herein,a built-in electric field with...The construction of built-in electric field is generally considered as an effective strategy to enhance photocatalytic performance due to its significant role in charge separation.Herein,a built-in electric field within g-C_(3)N_4 hollow nanospheres co-doped with sulfur and oxygen and modified in-situ Ni_(2)P is proposed.Ni_(2)P/SO-HC_(3)N_4 exhibits significantly enhanced board spectrum photocatalytic properties for hydrogen precipitation(5.21 mmol h^(-1)g^(-1))and photocatalytic Cr(VI)reduction without the use of noble metal.It also achieves high photocatalytic sterilization activity and remarkable stability when used to completely inactivate E.coli(10~7)in 60 min under Vis-NIR light irradiation.The enhanced performance is attributed to the formation of a curved hollow sphere structure,which promotes the electron transfer between the inner and outer layers.In addition,co-doping inhibits the recombination of photogenerated carriers,and the built-in electric field recombined with Ni_(2)facilitates the electron transfer between the composite interfaces.This design strategy demonstrates an original method of devising multifunctional photocatalysts with enhanced activity and stability.展开更多
以双氰胺(C_(2)H_(4)N_(4))为原料,采用直接热聚合法制备石墨相氮化碳(g-C_(3)N_(4));以六水合氯化镍(NiCl_(2)·6H_(2)O)和赤磷(P4)为原料,采用简易的水热法将磷化镍(Ni_(2)P)助催化剂负载到二维g-C_(3)N_(4)表面.通过X-射线衍射(X...以双氰胺(C_(2)H_(4)N_(4))为原料,采用直接热聚合法制备石墨相氮化碳(g-C_(3)N_(4));以六水合氯化镍(NiCl_(2)·6H_(2)O)和赤磷(P4)为原料,采用简易的水热法将磷化镍(Ni_(2)P)助催化剂负载到二维g-C_(3)N_(4)表面.通过X-射线衍射(XRD)、红外(IR)、透射电子显微镜(TEM)、扫描透射电子显微镜(STEM)、N_(2)吸/脱附、固体紫外漫反射(UV-Vis DRS)、荧光(PL)等,表征所合成催化剂的化学结构、微观形貌及光电性质;以原生生物质杨树叶为牺牲剂,在碱性条件下(3 M NaOH)研究催化剂的光催化重整制氢性能.结果表明:单一的g-C_(3)N_(4)材料无法实现光催化重整制氢,而少量的Ni_(2)P助催化剂负载后可以实现光催化重整制氢;当Ni_(2)P助催化剂负载量为4%(质量分数),杨树叶质量浓度为0.2 g/L时,催化剂展现出最佳的光催化重整制氢活性,平均产氢速率可达3.38μmol/(g·h).展开更多
基金financially supported by the National Natural Science Foundation of China(No.21906072,22006057,21671084 and 51902140)the Natural Science Foundation of Jiangsu Province(BK20190982)+2 种基金Henan Postdoctoral Foundation(202003013)“Doctor of Mass entrepreneurship and innovation”Project in Jiangsu Province,Jiangsu 333 talents project funding(BRA2018342)Jiangsu provincial government scholarship for overseas studies,the Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology(China)(1062931806 and 1142931803)。
文摘Constructing the stable,low-cost,efficient,and highly adaptable visible light-driven photocatalyst to implement the synergistic effect of photocatalysis and adsorption has been excavated a promising strategy to deal with antibiotic pollution in water bodies.Herein,a novel 3 D ternary Z-scheme heterojunction photocatalyst Ni_(2)P/Bi_(2)MoO_(6)/g-C_(3)N_(4)(Ni_(2)P/BMO/CN)was fabricated by a simple solvothermal method in which the broad spectrum antibiotics(mainly tetracyclines and supplemented by quinolones)were used as target pollution sources to evaluate its adsorption and photocatalytic performance.Notably,the Zscheme composite significantly exhibit the enhancement for degradation efficiency of tetracycline and other antibiotic by using Ni_(2)P nanoparticles as electron conductor.Active species capture experiment and electron spin resonance(ESR)technology reveal the mechanism of Z-scheme Ni_(2)P/BMO/CN photocatalytic reaction in detail.In addition,based on the identification of intermediates by liquid chromatography–mass spectroscopy(LC–MS),the possible photocatalytic degradation pathways of TC were proposed.
基金financially supported by the National Natural Science Foundation of China(Nos.21866012,61764003 and 41763015)the Basic and Applied Basic Research Program of Hainan Province(No.2019RC023)+1 种基金the Major Science and Technology Planning Project of Hainan Province(No.ZDKJ201810)the Scientific Research Foundation of Hainan University(No.kyqd1659)。
文摘The construction of built-in electric field is generally considered as an effective strategy to enhance photocatalytic performance due to its significant role in charge separation.Herein,a built-in electric field within g-C_(3)N_4 hollow nanospheres co-doped with sulfur and oxygen and modified in-situ Ni_(2)P is proposed.Ni_(2)P/SO-HC_(3)N_4 exhibits significantly enhanced board spectrum photocatalytic properties for hydrogen precipitation(5.21 mmol h^(-1)g^(-1))and photocatalytic Cr(VI)reduction without the use of noble metal.It also achieves high photocatalytic sterilization activity and remarkable stability when used to completely inactivate E.coli(10~7)in 60 min under Vis-NIR light irradiation.The enhanced performance is attributed to the formation of a curved hollow sphere structure,which promotes the electron transfer between the inner and outer layers.In addition,co-doping inhibits the recombination of photogenerated carriers,and the built-in electric field recombined with Ni_(2)facilitates the electron transfer between the composite interfaces.This design strategy demonstrates an original method of devising multifunctional photocatalysts with enhanced activity and stability.
文摘以双氰胺(C_(2)H_(4)N_(4))为原料,采用直接热聚合法制备石墨相氮化碳(g-C_(3)N_(4));以六水合氯化镍(NiCl_(2)·6H_(2)O)和赤磷(P4)为原料,采用简易的水热法将磷化镍(Ni_(2)P)助催化剂负载到二维g-C_(3)N_(4)表面.通过X-射线衍射(XRD)、红外(IR)、透射电子显微镜(TEM)、扫描透射电子显微镜(STEM)、N_(2)吸/脱附、固体紫外漫反射(UV-Vis DRS)、荧光(PL)等,表征所合成催化剂的化学结构、微观形貌及光电性质;以原生生物质杨树叶为牺牲剂,在碱性条件下(3 M NaOH)研究催化剂的光催化重整制氢性能.结果表明:单一的g-C_(3)N_(4)材料无法实现光催化重整制氢,而少量的Ni_(2)P助催化剂负载后可以实现光催化重整制氢;当Ni_(2)P助催化剂负载量为4%(质量分数),杨树叶质量浓度为0.2 g/L时,催化剂展现出最佳的光催化重整制氢活性,平均产氢速率可达3.38μmol/(g·h).
