Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant oxidation.Here,a simple photoreduction method was used to creat...Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant oxidation.Here,a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters(MSCs,M=Cu,Pd,Au and Ag)on P-modulated tubular carbon nitride(TCN).The obtained MSCs@TCN demonstrated excellent photocatalytic performances for the degradation of sulfamethazine(SMZ).In particular,the photocatalyst with 2 wt%Cu loading showed ultrahigh SMZ oxidation efficiency(k=0.06110 min^(-1)),almost three times that of TCN(k=0.02066 min^(-1)).It also shows excellent stability in the 5th-cycle measurements.The improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites,accelerated charge transfer from bulk TCN to Cu sites through Cu-N_(x)interaction.Meanwhile,the active sites of Cu single-atoms/clusters could promote the production of·O_(2)^(-),which participates in organic oxidation with strong oxidizing holes(h^(+)).This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.展开更多
目的探讨球囊扩张或血管支架补救治疗对急性大脑中动脉M1段机械取栓治疗失败患者的安全性和有效性,并分析患者预后的影响因素。方法回顾性分析2014年1月至2018年6月中国人民解放军陆军军医大学第二附属医院综合卒中中心和其他19家综合...目的探讨球囊扩张或血管支架补救治疗对急性大脑中动脉M1段机械取栓治疗失败患者的安全性和有效性,并分析患者预后的影响因素。方法回顾性分析2014年1月至2018年6月中国人民解放军陆军军医大学第二附属医院综合卒中中心和其他19家综合卒中中心80例急性大脑中动脉M1段机械取栓治疗失败并行补救治疗达到闭塞血管血流改良脑梗死溶栓分级(modi?ed thrombolysis in cerebral infarction score,m TICI)≥2b级患者的临床资料,根据补救治疗方法将其分为球囊扩张组(30例)和血管支架植入组(50例)。比较两组患者90 d改良Rankin量表(modi?ed Rankin scale,m RS)评分、血管再闭塞率、症状性颅内出血发生率及死亡率,并对影响患者预后的相关因素进行多因素Logistic回归分析。结果球囊扩张组中90 d mRS评分0～2分患者占比明显高于血管支架植入组(P <0.05);两组患者血管再闭塞率、死亡率及症状性颅内出血发生率比较均无显著差异(P_均> 0.05)。多因素Logistic回归分析显示:卒中病史(OR=8.968,95%CI:1.162～69.196,P=0.035)、补救治疗方式(OR=0.243,95%CI:0.066～0.894,P=0.033)、侧支循环(OR=3.873,95%CI:1.029～14.576,P=0.045)及基线美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)评分(OR=0.809,95%CI:0.701～0.934,P=0.004)均为急性大脑中动脉M1段闭塞取栓失败后行补救治疗患者神经功能预后的独立危险因素(P_均<0.05)。结论机械取栓联合球囊扩张能够有效改善急性大脑中动脉M1段闭塞性缺血性脑卒中患者神经功能,并未增加手术风险,且补救治疗方式是影响患者治疗后神经功能的独立危险因素。展开更多
基金financially supported by the National Natural Science Foundation of China(No.U22B20102)Shandong Provincial Natural Science Foundation(No.ZR2023QE218)+3 种基金the Young Taishan Scholars Program of Shandong Province(No.tsqn201909026)Taishan Scholars Project of Shandong Province(No.tstp20230604)the Future Young Scholars Program of Shandong University(No.61440089964189)the Key Laboratory of Organic Compound Pollution Control Engineering(MOE)Foundation(No.20190202)。
文摘Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant oxidation.Here,a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters(MSCs,M=Cu,Pd,Au and Ag)on P-modulated tubular carbon nitride(TCN).The obtained MSCs@TCN demonstrated excellent photocatalytic performances for the degradation of sulfamethazine(SMZ).In particular,the photocatalyst with 2 wt%Cu loading showed ultrahigh SMZ oxidation efficiency(k=0.06110 min^(-1)),almost three times that of TCN(k=0.02066 min^(-1)).It also shows excellent stability in the 5th-cycle measurements.The improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites,accelerated charge transfer from bulk TCN to Cu sites through Cu-N_(x)interaction.Meanwhile,the active sites of Cu single-atoms/clusters could promote the production of·O_(2)^(-),which participates in organic oxidation with strong oxidizing holes(h^(+)).This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.
文摘目的探讨球囊扩张或血管支架补救治疗对急性大脑中动脉M1段机械取栓治疗失败患者的安全性和有效性,并分析患者预后的影响因素。方法回顾性分析2014年1月至2018年6月中国人民解放军陆军军医大学第二附属医院综合卒中中心和其他19家综合卒中中心80例急性大脑中动脉M1段机械取栓治疗失败并行补救治疗达到闭塞血管血流改良脑梗死溶栓分级(modi?ed thrombolysis in cerebral infarction score,m TICI)≥2b级患者的临床资料,根据补救治疗方法将其分为球囊扩张组(30例)和血管支架植入组(50例)。比较两组患者90 d改良Rankin量表(modi?ed Rankin scale,m RS)评分、血管再闭塞率、症状性颅内出血发生率及死亡率,并对影响患者预后的相关因素进行多因素Logistic回归分析。结果球囊扩张组中90 d mRS评分0～2分患者占比明显高于血管支架植入组(P <0.05);两组患者血管再闭塞率、死亡率及症状性颅内出血发生率比较均无显著差异(P_均> 0.05)。多因素Logistic回归分析显示:卒中病史(OR=8.968,95%CI:1.162～69.196,P=0.035)、补救治疗方式(OR=0.243,95%CI:0.066～0.894,P=0.033)、侧支循环(OR=3.873,95%CI:1.029～14.576,P=0.045)及基线美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)评分(OR=0.809,95%CI:0.701～0.934,P=0.004)均为急性大脑中动脉M1段闭塞取栓失败后行补救治疗患者神经功能预后的独立危险因素(P_均<0.05)。结论机械取栓联合球囊扩张能够有效改善急性大脑中动脉M1段闭塞性缺血性脑卒中患者神经功能,并未增加手术风险,且补救治疗方式是影响患者治疗后神经功能的独立危险因素。
