用柠檬酸络合法制备了钙钛矿型 La Fe O3及 La Fe1 - x Cux O3化合物 ,测定了其对酸性红 3B等水溶性染料的光催化降解活性 .利用红外、紫外和光声光谱、正电子寿命谱及光电子能谱等技术分析了 La Fe O3的光催化性能及掺杂对其活性的影...用柠檬酸络合法制备了钙钛矿型 La Fe O3及 La Fe1 - x Cux O3化合物 ,测定了其对酸性红 3B等水溶性染料的光催化降解活性 .利用红外、紫外和光声光谱、正电子寿命谱及光电子能谱等技术分析了 La Fe O3的光催化性能及掺杂对其活性的影响 .结果表明 ,掺杂 Cu2 + 可使 La Fe展开更多
O644 2003043144钙钛矿型LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>的光催化活性研究=Study ofphotocatlytic activity of perovskite type LaFe<sub>1-x</sub>Cu<sub>x&l...O644 2003043144钙钛矿型LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>的光催化活性研究=Study ofphotocatlytic activity of perovskite type LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>[刊,中]/傅希贤（天津大学理学院.天津（300072））,杨秋华…∥高等学校化学学报.-2002,23（2）.-283-286用柠檬酸络合法制备了钙钛矿型LaFeO<sub>3</sub>及LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>化合物,测定了其对酸性红3B等水溶性染料的光催化降解活性。利用红外、紫外和光声光谱、正电子寿命谱及光电子能谱等技术分析了LaFeO<sub>3</sub>的光催化性能及掺杂对其活性的影响。结果表明掺杂Cu<sup>2+</sup>可使LaFeO<sub>3</sub>的光催化活性明显提高。图3表2参13（张志升）展开更多
O641．1 2005043188 水分子光解动力学计算研究=Theoretical study on photo- dissociation of water[刊,中]／阎晓(山东师范大学化学化工与材料科学学院,山东,济南(250014)),陈德展／／山东师范大学学报(自然科学版),-2005,20(2),-51-...O641．1 2005043188 水分子光解动力学计算研究=Theoretical study on photo- dissociation of water[刊,中]／阎晓(山东师范大学化学化工与材料科学学院,山东,济南(250014)),陈德展／／山东师范大学学报(自然科学版),-2005,20(2),-51-53 用现有的Gaussian98量子化学计算程序,在CIS／6-31 +G(d)基组水平上,对H2O分子在光照下分解为H和 OH的反应机理进行了系统研究。首先作出了反应的势能面(PES),然后优化得到了反应物。展开更多
The role of oxygen and the generation of active radicals in the photocatalitic degradation of phenol were investigated using the eosin sensitized TiO2 as photocatalyst under visible light irradiation. Diffuse reflecta...The role of oxygen and the generation of active radicals in the photocatalitic degradation of phenol were investigated using the eosin sensitized TiO2 as photocatalyst under visible light irradiation. Diffuse reflectance spectra show that the absorbancy range of eosin/TiO2 is expanded from 378 nm (TiO2 ) to about 600 nm. The photocatalitic degradation of phenol is almost stopped when the eosin/TiO2 system is saturated with N2 , which indicates the significance of O2 . The addition of NaN 3 (a quencher of single oxygen) causes about a 62% decrease in the phenol degradation. The phenol degradation ratio is dropped from 92% to 75% when the isopropanol (a quencher of hydroxyl radical) is present in the system. The experimental results show that there are singlet oxygen and hydroxyl radical generated in the eosin/TiO2 system under visible light irradiation. The changes of absorbancy indicate that the hydrogen peroxide might be produced. Through the analysis and comparison, it is found that the singlet oxygen is the predominant active radical for the degradation of phenol.展开更多
ZnO/ZnGa_2O_4 composite microspheres with heterojunction were successfully synthesized by one-pot hydrothermal method.These samples were characterized by TG/DTA,XRD,TEM,HRTEM,UV-vis DRS,FL and BET techniques.The resul...ZnO/ZnGa_2O_4 composite microspheres with heterojunction were successfully synthesized by one-pot hydrothermal method.These samples were characterized by TG/DTA,XRD,TEM,HRTEM,UV-vis DRS,FL and BET techniques.The results indicated the as-prepared samples showed better degree of crystalline and large specific surface area.The photocatalytic activity was evaluated by degradation of methyl orange with the concentration of 50 mg/L under the irradiation of simulated sunlight.The effects of molar ratio of Zn to Ga and calcination temperature on the photocatalytic activity were investigated in detail.The results showed that the highest photocatalytic degradation efficiency was observed at the molar ratio of Zn to Ga of 1:0.5 in the starting materials and the calcination temperature of 400 °C.The maximum photocatalytic degradation rate of MO was 97.1% within 60 min under the simulated sunlight irradiation,which is greatly higher than that of ZnO and ZnGa_2O_4.展开更多
文摘用柠檬酸络合法制备了钙钛矿型 La Fe O3及 La Fe1 - x Cux O3化合物 ,测定了其对酸性红 3B等水溶性染料的光催化降解活性 .利用红外、紫外和光声光谱、正电子寿命谱及光电子能谱等技术分析了 La Fe O3的光催化性能及掺杂对其活性的影响 .结果表明 ,掺杂 Cu2 + 可使 La Fe
文摘O644 2003043144钙钛矿型LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>的光催化活性研究=Study ofphotocatlytic activity of perovskite type LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>[刊,中]/傅希贤（天津大学理学院.天津（300072））,杨秋华…∥高等学校化学学报.-2002,23（2）.-283-286用柠檬酸络合法制备了钙钛矿型LaFeO<sub>3</sub>及LaFe<sub>1-x</sub>Cu<sub>x</sub>O<sub>3</sub>化合物,测定了其对酸性红3B等水溶性染料的光催化降解活性。利用红外、紫外和光声光谱、正电子寿命谱及光电子能谱等技术分析了LaFeO<sub>3</sub>的光催化性能及掺杂对其活性的影响。结果表明掺杂Cu<sup>2+</sup>可使LaFeO<sub>3</sub>的光催化活性明显提高。图3表2参13（张志升）
文摘O641．1 2005043188 水分子光解动力学计算研究=Theoretical study on photo- dissociation of water[刊,中]／阎晓(山东师范大学化学化工与材料科学学院,山东,济南(250014)),陈德展／／山东师范大学学报(自然科学版),-2005,20(2),-51-53 用现有的Gaussian98量子化学计算程序,在CIS／6-31 +G(d)基组水平上,对H2O分子在光照下分解为H和 OH的反应机理进行了系统研究。首先作出了反应的势能面(PES),然后优化得到了反应物。
基金Project(8451063201001261) supported by the Guangdong Natural Science Fund Committee,ChinaProject(LYM08022) supported by the Foundation for Distinguished Young Talents in Higher Education of Guangdong,China+1 种基金Project (2007A032400001, 2008A030202010) supported by the Scientific and Technological Planning of Guangdong Province,ChinaProject(216113132) supported by the Scientific Research Cultivation and Innovation Fund, Jinan University,China
文摘The role of oxygen and the generation of active radicals in the photocatalitic degradation of phenol were investigated using the eosin sensitized TiO2 as photocatalyst under visible light irradiation. Diffuse reflectance spectra show that the absorbancy range of eosin/TiO2 is expanded from 378 nm (TiO2 ) to about 600 nm. The photocatalitic degradation of phenol is almost stopped when the eosin/TiO2 system is saturated with N2 , which indicates the significance of O2 . The addition of NaN 3 (a quencher of single oxygen) causes about a 62% decrease in the phenol degradation. The phenol degradation ratio is dropped from 92% to 75% when the isopropanol (a quencher of hydroxyl radical) is present in the system. The experimental results show that there are singlet oxygen and hydroxyl radical generated in the eosin/TiO2 system under visible light irradiation. The changes of absorbancy indicate that the hydrogen peroxide might be produced. Through the analysis and comparison, it is found that the singlet oxygen is the predominant active radical for the degradation of phenol.
基金Projects(21306041,21271071)supported by the National Natural Science Foundation of ChinaProject(15A076)supported by the Scientific Research Foundation of Hunan Provincial Education Department of China
文摘ZnO/ZnGa_2O_4 composite microspheres with heterojunction were successfully synthesized by one-pot hydrothermal method.These samples were characterized by TG/DTA,XRD,TEM,HRTEM,UV-vis DRS,FL and BET techniques.The results indicated the as-prepared samples showed better degree of crystalline and large specific surface area.The photocatalytic activity was evaluated by degradation of methyl orange with the concentration of 50 mg/L under the irradiation of simulated sunlight.The effects of molar ratio of Zn to Ga and calcination temperature on the photocatalytic activity were investigated in detail.The results showed that the highest photocatalytic degradation efficiency was observed at the molar ratio of Zn to Ga of 1:0.5 in the starting materials and the calcination temperature of 400 °C.The maximum photocatalytic degradation rate of MO was 97.1% within 60 min under the simulated sunlight irradiation,which is greatly higher than that of ZnO and ZnGa_2O_4.
