铁原子掺入氧化锌可大幅增加其光催化性能从而提高了除污能力.该文通过行星球磨结合高温固溶掺杂的方法制备Zn_(1-x)Fe_(x)O材料.通过紫外分光光度计,X射线粉末衍射实验和键弛豫理论,定量分析了Fe^(3+)掺杂对Zn-O键弛豫动力学及其光催...铁原子掺入氧化锌可大幅增加其光催化性能从而提高了除污能力.该文通过行星球磨结合高温固溶掺杂的方法制备Zn_(1-x)Fe_(x)O材料.通过紫外分光光度计,X射线粉末衍射实验和键弛豫理论,定量分析了Fe^(3+)掺杂对Zn-O键弛豫动力学及其光催化效率的影响.研究表明:当Fe^(3+)掺杂浓度为10%时,1 g Zn_(1-x)Fe_(x)O材料在2.5 h内,光降解亚甲基蓝可达到66%,比纯ZnO高出52%;掺杂浓度在10%以内时,Zn_(1-x)Fe_(x)O材料中Zn-O键的单键能和禁带宽度均随着Fe^(3+)掺杂浓度的增加而减小;定量获取了不同浓度下Zn-O键的配位数、单键能和禁带宽度.为Zn_(1-x)Fe_(x)O材料的制备及其光催化性能的定量研究提供了一种简单、易控且低成本的新方法.展开更多
A novel soluble π-conjugated polymer, poly[(3-octanoylpyrrole-2,5-diyl)-p-(N,N-dimethylamino)benzylidene](POPDMABE), was synthesized firstly by the condensation of 3-octanoylpyrrole with para-dimethylaminobenzaldehyd...A novel soluble π-conjugated polymer, poly[(3-octanoylpyrrole-2,5-diyl)-p-(N,N-dimethylamino)benzylidene](POPDMABE), was synthesized firstly by the condensation of 3-octanoylpyrrole with para-dimethylaminobenzaldehyde. The chemical structure of the polymer was characterized by FTIR and 1H NMR spectrometries. The polymer is a potential nonlinear optical(NLO) material. According to the function of optical forbidden band gap(E_g) and photon energy(hν), the optical forbidden band gaps of the polymer before and after ion implantation were calculated. The resonant third-order nonlinear optical properties of POPDMABE before and after ion implantation were also studied by using the degenerate four-wave mixing(DFWM) technique at 532 nm. When the energy is 25 keV and the dose is 2.2×10 17 ions/cm 2, the {polymer′s} optical forbidden band gap is about 1.63 eV which is smaller than that of the non-implanted sample(1.98 eV) and the resonant third-order NLO susceptibility of POPDMABE is about 4.3×10 -7 esu, 1 order of magnitude higher than that of the non-implanted sample(4.1×10 -8 esu). The results show that nitrogen ion implantation is an effective method to improve the resonant third-order NLO property of the polymer.展开更多
文摘铁原子掺入氧化锌可大幅增加其光催化性能从而提高了除污能力.该文通过行星球磨结合高温固溶掺杂的方法制备Zn_(1-x)Fe_(x)O材料.通过紫外分光光度计,X射线粉末衍射实验和键弛豫理论,定量分析了Fe^(3+)掺杂对Zn-O键弛豫动力学及其光催化效率的影响.研究表明:当Fe^(3+)掺杂浓度为10%时,1 g Zn_(1-x)Fe_(x)O材料在2.5 h内,光降解亚甲基蓝可达到66%,比纯ZnO高出52%;掺杂浓度在10%以内时,Zn_(1-x)Fe_(x)O材料中Zn-O键的单键能和禁带宽度均随着Fe^(3+)掺杂浓度的增加而减小;定量获取了不同浓度下Zn-O键的配位数、单键能和禁带宽度.为Zn_(1-x)Fe_(x)O材料的制备及其光催化性能的定量研究提供了一种简单、易控且低成本的新方法.
文摘A novel soluble π-conjugated polymer, poly[(3-octanoylpyrrole-2,5-diyl)-p-(N,N-dimethylamino)benzylidene](POPDMABE), was synthesized firstly by the condensation of 3-octanoylpyrrole with para-dimethylaminobenzaldehyde. The chemical structure of the polymer was characterized by FTIR and 1H NMR spectrometries. The polymer is a potential nonlinear optical(NLO) material. According to the function of optical forbidden band gap(E_g) and photon energy(hν), the optical forbidden band gaps of the polymer before and after ion implantation were calculated. The resonant third-order nonlinear optical properties of POPDMABE before and after ion implantation were also studied by using the degenerate four-wave mixing(DFWM) technique at 532 nm. When the energy is 25 keV and the dose is 2.2×10 17 ions/cm 2, the {polymer′s} optical forbidden band gap is about 1.63 eV which is smaller than that of the non-implanted sample(1.98 eV) and the resonant third-order NLO susceptibility of POPDMABE is about 4.3×10 -7 esu, 1 order of magnitude higher than that of the non-implanted sample(4.1×10 -8 esu). The results show that nitrogen ion implantation is an effective method to improve the resonant third-order NLO property of the polymer.
