In this study,Ni_(2)P/CdS composites were constructed by depositing non-precious metal co-catalyst Ni_(2)P on a one-dimensional network of CdS using a simple in-situ photodeposition method.The prepared photocatalysts ...In this study,Ni_(2)P/CdS composites were constructed by depositing non-precious metal co-catalyst Ni_(2)P on a one-dimensional network of CdS using a simple in-situ photodeposition method.The prepared photocatalysts promoted the decomposition of ethanol into high-value-added products while generating hydrogen.The composite photoanodes loaded with the Ni_(2)P co-catalysts showed significantly higher ethanol conversion and hydrogen production in the visible light region,which was almost three times higher than that of pure CdS.The main products of photocatalytic ethanol production are acetaldehyde(AA)and 2,3-butanediol(2,3-BDA).Compared with CdS,the selectivity of the composite photocatalysts for converting ethanol to acetaldehyde was significantly improved(62% to 78%).Characterization of the prepared photocatalysts confirmed that the loading of Ni_(2)P co-catalysts on CdS not only broadened the optical region of the catalysts for trapping light but also effectively promoted the separation and transfer of charge carriers,which significantly improved the photocatalytic efficiency of ethanol conversion and hydrogen production in the catalysts.It has been proven through Electron Paramagnetic Resonance testing that loading a Ni_(2)P co-catalyst on CdS is beneficial for the adsorption of hydroxyethyl radicals(*CH(OH)CH_(3)),thereby further improving the selectivity of acetaldehyde.This study plays an important role in the rational design of composite catalyst structures and the introduction of co-catalysts to improve catalyst performance,promote green chemistry,advocate a low-carbon society,and promote sustainable development.展开更多
目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死...目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死组30只小鼠又随机分为A、B、C、D、E组,分别在心肌梗死后1、3、5、7、14 d取材。收取小鼠的外周血和心脏组织,采用流式细胞术检测巨噬细胞亚群的动态变化与CD59和P2X7的表达情况。结果心肌梗死后1、3 d外周血中单核细胞数量均高于对照组[(9.5±1.7)、(10.3±3.7)×10^(4)/ml比(3.2±3.1)×10^(4)/ml](均P<0.05)。心肌梗死后1、3、5 d心脏组织白细胞计数、巨噬细胞计数均高于对照组(均P<0.05)。心脏组织中Ly6C^(high)巨噬细胞计数在心肌梗死后3 d达到高峰,而Ly6C^(low)亚群在心肌梗死后5 d达到高峰,均高于对照组(均P<0.05)。心肌梗死后1 d P2X7^(-)CD59^(-)巨噬细胞占Ly6C^(high)巨噬细胞百分比高于对照组,而P2X7^(+)CD59^(+)巨噬细胞占比低于对照组(均P<0.05)。心肌梗死后1、3、5 d P2X7^(+)CD59^(+)巨噬细胞占Ly6C^(low)巨噬细胞百分比均低于对照组,而P2X7^(-)CD59^(+)巨噬细胞占比均高于对照组(均P<0.05)。结论在小鼠急性心肌梗死的不同阶段,心脏组织巨噬细胞的亚群呈现动态变化,同时伴随CD59和P2X7表达的动态变化。展开更多
基金supported by the National Natural Science Foundation of China(22075197,22278290)the Shanxi Provincial Natural Science Foundation of China(202103021224079,201903D421081)the Research and Development Project of Key Core and Common Technology of Shanxi Province(20201102018)。
文摘In this study,Ni_(2)P/CdS composites were constructed by depositing non-precious metal co-catalyst Ni_(2)P on a one-dimensional network of CdS using a simple in-situ photodeposition method.The prepared photocatalysts promoted the decomposition of ethanol into high-value-added products while generating hydrogen.The composite photoanodes loaded with the Ni_(2)P co-catalysts showed significantly higher ethanol conversion and hydrogen production in the visible light region,which was almost three times higher than that of pure CdS.The main products of photocatalytic ethanol production are acetaldehyde(AA)and 2,3-butanediol(2,3-BDA).Compared with CdS,the selectivity of the composite photocatalysts for converting ethanol to acetaldehyde was significantly improved(62% to 78%).Characterization of the prepared photocatalysts confirmed that the loading of Ni_(2)P co-catalysts on CdS not only broadened the optical region of the catalysts for trapping light but also effectively promoted the separation and transfer of charge carriers,which significantly improved the photocatalytic efficiency of ethanol conversion and hydrogen production in the catalysts.It has been proven through Electron Paramagnetic Resonance testing that loading a Ni_(2)P co-catalyst on CdS is beneficial for the adsorption of hydroxyethyl radicals(*CH(OH)CH_(3)),thereby further improving the selectivity of acetaldehyde.This study plays an important role in the rational design of composite catalyst structures and the introduction of co-catalysts to improve catalyst performance,promote green chemistry,advocate a low-carbon society,and promote sustainable development.
文摘目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死组30只小鼠又随机分为A、B、C、D、E组,分别在心肌梗死后1、3、5、7、14 d取材。收取小鼠的外周血和心脏组织,采用流式细胞术检测巨噬细胞亚群的动态变化与CD59和P2X7的表达情况。结果心肌梗死后1、3 d外周血中单核细胞数量均高于对照组[(9.5±1.7)、(10.3±3.7)×10^(4)/ml比(3.2±3.1)×10^(4)/ml](均P<0.05)。心肌梗死后1、3、5 d心脏组织白细胞计数、巨噬细胞计数均高于对照组(均P<0.05)。心脏组织中Ly6C^(high)巨噬细胞计数在心肌梗死后3 d达到高峰,而Ly6C^(low)亚群在心肌梗死后5 d达到高峰,均高于对照组(均P<0.05)。心肌梗死后1 d P2X7^(-)CD59^(-)巨噬细胞占Ly6C^(high)巨噬细胞百分比高于对照组,而P2X7^(+)CD59^(+)巨噬细胞占比低于对照组(均P<0.05)。心肌梗死后1、3、5 d P2X7^(+)CD59^(+)巨噬细胞占Ly6C^(low)巨噬细胞百分比均低于对照组,而P2X7^(-)CD59^(+)巨噬细胞占比均高于对照组(均P<0.05)。结论在小鼠急性心肌梗死的不同阶段,心脏组织巨噬细胞的亚群呈现动态变化,同时伴随CD59和P2X7表达的动态变化。
